{"id":860,"date":"2023-04-11T21:21:17","date_gmt":"2023-04-11T12:21:17","guid":{"rendered":"http:\/\/edu.ujhb.org\/?p=860"},"modified":"2023-04-11T21:21:17","modified_gmt":"2023-04-11T12:21:17","slug":"java%e5%85%a5%e9%97%a8%ef%bc%88%e4%b8%ad%e6%96%87%e7%89%88%ef%bc%89","status":"publish","type":"post","link":"https:\/\/edu.ujhb.org\/?p=860","title":{"rendered":"Java\u5165\u95e8\uff08\u4e2d\u6587\u7248\uff09"},"content":{"rendered":"\n<p>\u6211\u662f\u8981\u505aIT\u6559\u7a0b\u7684\u89c6\u9891\uff0c\u4f60\u80fd\u5426\u6839\u636e\u7f51\u7ad9\u7684\u5185\u5bb9\uff0c\u4e3a\u6211\u5b89\u6392\u89c6\u9891\u6559\u7a0b\u7684\u6587\u5b57\u5185\u5bb9\u3002\u6211\u4eec\u5148\u4eceJava\u6559\u7a0b\u5f00\u59cb\uff0c\u4f60\u5148\u4e3a\u6211\u5217\u51fa\u8981\u8bb2\u89e3\u7684\u5185\u5bb9\u4e00\u89c8\u3002<\/p>\n\n\n\n<p>\u5f53\u7136\u53ef\u4ee5\uff01\u4ee5\u4e0b\u662fJava\u6559\u7a0b\u7684\u5927\u81f4\u5185\u5bb9\u6982\u89c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Java\u4ecb\u7ecd\u548c\u73af\u5883\u642d\u5efa<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ec0\u4e48\u662fJava\u4ee5\u53ca\u5b83\u7684\u5386\u53f2\u80cc\u666f<\/li>\n\n\n\n<li>\u5b89\u88c5Java\u5f00\u53d1\u73af\u5883\uff08JDK\uff09<\/li>\n\n\n\n<li>\u914d\u7f6eJava\u5f00\u53d1\u73af\u5883<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>Java\u57fa\u7840\u8bed\u6cd5<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u636e\u7c7b\u578b\u548c\u53d8\u91cf<\/li>\n\n\n\n<li>\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f<\/li>\n\n\n\n<li>\u63a7\u5236\u6d41\u8bed\u53e5\uff08if\u8bed\u53e5\u3001for\u5faa\u73af\u3001while\u5faa\u73af\u7b49\uff09<\/li>\n\n\n\n<li>\u6570\u7ec4<\/li>\n\n\n\n<li>\u65b9\u6cd5<\/li>\n\n\n\n<li>\u7c7b\u548c\u5bf9\u8c61<\/li>\n\n\n\n<li>\u7ee7\u627f\u548c\u591a\u6001<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c01\u88c5<\/li>\n\n\n\n<li>\u7ee7\u627f<\/li>\n\n\n\n<li>\u591a\u6001<\/li>\n\n\n\n<li>\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3<\/li>\n\n\n\n<li>\u5185\u90e8\u7c7b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\" start=\"4\">\n<li>Java\u5e38\u7528\u7c7b\u5e93<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b57\u7b26\u4e32<\/li>\n\n\n\n<li>\u65f6\u95f4\u548c\u65e5\u671f<\/li>\n\n\n\n<li>\u96c6\u5408\u7c7b<\/li>\n\n\n\n<li>\u6587\u4ef6IO\u64cd\u4f5c<\/li>\n\n\n\n<li>\u5f02\u5e38\u5904\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\" start=\"5\">\n<li>Java\u9ad8\u7ea7\u7279\u6027<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6cdb\u578b<\/li>\n\n\n\n<li>\u53cd\u5c04<\/li>\n\n\n\n<li>\u6ce8\u89e3<\/li>\n\n\n\n<li>\u679a\u4e3e<\/li>\n\n\n\n<li>\u591a\u7ebf\u7a0b\u7f16\u7a0b<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0a\u662fJava\u6559\u7a0b\u7684\u4e3b\u8981\u5185\u5bb9\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u8fd9\u4e2a\u5927\u7eb2\u6765\u5236\u5b9a\u4f60\u7684\u89c6\u9891\u6559\u7a0b\u8ba1\u5212\uff0c\u6ce8\u610f\u8ba9\u4f60\u7684\u8bb2\u89e3\u6709\u9002\u5f53\u7684\u6df1\u5ea6\u548c\u5e7f\u5ea6\uff0c\u4ee5\u4fbf\u8ba9\u5b66\u4e60\u8005\u5168\u9762\u638c\u63e1Java\u7f16\u7a0b\u7684\u57fa\u7840\u77e5\u8bc6\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91ca\u4ec0\u4e48\u662fJava\u4ee5\u53ca\u5b83\u7684\u5386\u53f2\u80cc\u666f<\/p>\n\n\n\n<p>Java\u662f\u4e00\u79cd\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00\uff0c\u6700\u521d\u7531Sun Microsystems\uff08\u540e\u88abOracle\u6536\u8d2d\uff09\u7684\u8a79\u59c6\u65af\u00b7\u9ad8\u65af\u6797\uff08James Gosling\uff09\u7b49\u4eba\u4e8e20\u4e16\u7eaa90\u5e74\u4ee3\u521d\u671f\u5f00\u53d1\u800c\u6210\u3002Java\u8bed\u8a00\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u4ee5\u5176\u7b80\u5355\u3001\u5b89\u5168\u3001\u53ef\u79fb\u690d\u548c\u8de8\u5e73\u53f0\u7684\u7279\u6027\u800c\u95fb\u540d\u4e8e\u4e16\u3002<\/p>\n\n\n\n<p>Java\u8bed\u8a00\u6700\u521d\u7684\u8bbe\u8ba1\u76ee\u6807\u662f\u4e3a\u5d4c\u5165\u5f0f\u8bbe\u5907\u7f16\u5199\u5e94\u7528\u7a0b\u5e8f\uff0c\u4f46\u5f88\u5feb\u5c31\u53d1\u73b0Java\u5177\u6709\u6781\u9ad8\u7684\u53ef\u79fb\u690d\u6027\uff0c\u56e0\u6b64\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8eWeb\u3001\u4f01\u4e1a\u5e94\u7528\u7a0b\u5e8f\u3001\u684c\u9762\u5e94\u7528\u7a0b\u5e8f\u3001\u79fb\u52a8\u5e94\u7528\u7a0b\u5e8f\u548c\u6e38\u620f\u5f00\u53d1\u7b49\u9886\u57df\u3002<\/p>\n\n\n\n<p>Java\u5386\u53f2\u53ef\u4ee5\u8ffd\u6eaf\u523020\u4e16\u7eaa90\u5e74\u4ee3\u521d\u671f\uff0c\u5f53\u65f6Sun Microsystems\u516c\u53f8\u7684\u4e00\u7ec4\u5f00\u53d1\u4eba\u5458\u5f00\u59cb\u8bbe\u8ba1\u4e00\u79cd\u540d\u4e3a\u201cOak\u201d\u7684\u8bed\u8a00\uff0c\u7528\u4e8e\u5d4c\u5165\u5f0f\u7cfb\u7edf\u7684\u5f00\u53d1\u3002\u540e\u6765\uff0c\u8be5\u8bed\u8a00\u5728\u8fdb\u884c\u4e86\u51e0\u6b21\u4fee\u6539\u548c\u6539\u8fdb\u540e\uff0c\u6539\u540d\u4e3aJava\uff0c\u5e76\u4e8e1995\u5e74\u6b63\u5f0f\u53d1\u5e03\u3002<\/p>\n\n\n\n<p>\u5728\u53d1\u5e03\u4e4b\u521d\uff0cJava\u8bed\u8a00\u5f15\u8d77\u4e86\u5de8\u5927\u7684\u8f70\u52a8\uff0c\u56e0\u4e3a\u5b83\u5177\u6709\u5f88\u591a\u4f18\u79c0\u7684\u7279\u6027\uff0c\u5982\u8de8\u5e73\u53f0\u3001\u53ef\u79fb\u690d\u6027\u548c\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7b49\u3002\u8fd9\u4e9b\u7279\u6027\u4f7f\u5f97Java\u6210\u4e3a\u4e00\u79cd\u72ec\u7279\u7684\u8bed\u8a00\uff0c\u5e76\u9010\u6e10\u53d1\u5c55\u6210\u4e3a\u6700\u53d7\u6b22\u8fce\u7684\u7f16\u7a0b\u8bed\u8a00\u4e4b\u4e00\u3002\u5982\u4eca\uff0cJava\u5df2\u6210\u4e3a\u8bb8\u591a\u4f01\u4e1a\u548c\u7ec4\u7ec7\u7684\u9996\u9009\u7f16\u7a0b\u8bed\u8a00\uff0c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5404\u79cd\u9886\u57df\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91ca\u5982\u4f55\u5728Windows\u5b89\u88c5Java\u5f00\u53d1\u73af\u5883\uff08JDK\uff09<\/p>\n\n\n\n<p>\u5728Windows\u4e0a\u5b89\u88c5Java\u5f00\u53d1\u73af\u5883\uff08JDK\uff09\u975e\u5e38\u7b80\u5355\u3002\u4e0b\u9762\u662f\u5177\u4f53\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6253\u5f00Oracle\u5b98\u65b9\u7f51\u7ad9\uff08<a href=\"https:\/\/www.oracle.com\/java\/technologies\/javase-downloads.html%EF%BC%89%EF%BC%8C%E9%80%89%E6%8B%A9%E9%80%82%E5%90%88%E4%BD%A0%E7%9A%84%E6%93%8D%E4%BD%9C%E7%B3%BB%E7%BB%9F%E7%89%88%E6%9C%AC%E7%9A%84JDK%E4%B8%8B%E8%BD%BD%E9%93%BE%E6%8E%A5%E3%80%82\">https:\/\/www.oracle.com\/java\/technologies\/javase-downloads.html\uff09\uff0c\u9009\u62e9\u9002\u5408\u4f60\u7684\u64cd\u4f5c\u7cfb\u7edf\u7248\u672c\u7684JDK\u4e0b\u8f7d\u94fe\u63a5\u3002<\/a><\/li>\n\n\n\n<li>\u5b89\u88c5JDK\u3002\u4e0b\u8f7d\u5b8c\u6210\u540e\uff0c\u53cc\u51fb\u4e0b\u8f7d\u7684JDK\u5b89\u88c5\u6587\u4ef6\uff08.exe\u6587\u4ef6\uff09\uff0c\u6309\u7167\u63d0\u793a\u5b8c\u6210\u5b89\u88c5\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cJDK\u4f1a\u88ab\u5b89\u88c5\u5728&#8221;C:\\Program Files\\Java&#8221;\u76ee\u5f55\u4e0b\u3002<\/li>\n\n\n\n<li>\u914d\u7f6e\u73af\u5883\u53d8\u91cf\u3002\u4e3a\u4e86\u8ba9\u7cfb\u7edf\u80fd\u591f\u627e\u5230Java\u5f00\u53d1\u73af\u5883\uff0c\u9700\u8981\u5728\u7cfb\u7edf\u7684\u73af\u5883\u53d8\u91cf\u4e2d\u914d\u7f6eJava\u7684\u5b89\u88c5\u8def\u5f84\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1aa. \u53f3\u952e\u70b9\u51fb\u201c\u8ba1\u7b97\u673a\u201d\uff08\u6216\u8005\u201c\u6211\u7684\u7535\u8111\u201d\uff09\u56fe\u6807\uff0c\u9009\u62e9\u201c\u5c5e\u6027\u201d\u3002b. \u5728\u5de6\u4fa7\u9762\u677f\u4e2d\uff0c\u9009\u62e9\u201c\u9ad8\u7ea7\u7cfb\u7edf\u8bbe\u7f6e\u201d\u3002c. \u5728\u201c\u9ad8\u7ea7\u201d\u9009\u9879\u5361\u4e0b\uff0c\u70b9\u51fb\u201c\u73af\u5883\u53d8\u91cf\u201d\u6309\u94ae\u3002d. \u5728\u201c\u7cfb\u7edf\u53d8\u91cf\u201d\u533a\u57df\u4e2d\uff0c\u627e\u5230\u201cPath\u201d\u53d8\u91cf\uff0c\u53cc\u51fb\u6253\u5f00\u7f16\u8f91\u754c\u9762\u3002e. \u5728\u7f16\u8f91\u754c\u9762\u7684\u201c\u53d8\u91cf\u503c\u201d\u6587\u672c\u6846\u4e2d\uff0c\u6dfb\u52a0Java\u7684bin\u76ee\u5f55\u7684\u8def\u5f84\u3002\u4f8b\u5982\uff0c\u5982\u679cJDK\u5b89\u88c5\u5728\u9ed8\u8ba4\u76ee\u5f55\u4e0b\uff0c\u5e94\u8be5\u6dfb\u52a0\u201cC:\\Program Files\\Java\\jdk1.8.0_241\\bin\u201d\uff08\u6ce8\u610f\u7248\u672c\u53f7\u53ef\u80fd\u4f1a\u4e0d\u540c\uff09\u3002f. \u70b9\u51fb\u201c\u786e\u5b9a\u201d\u4fdd\u5b58\u4fee\u6539\u3002<\/li>\n\n\n\n<li>\u9a8c\u8bc1\u662f\u5426\u5b89\u88c5\u6210\u529f\u3002\u6253\u5f00\u547d\u4ee4\u63d0\u793a\u7b26\u7a97\u53e3\uff08Win+R\uff0c\u8f93\u5165&#8221;cmd&#8221;\uff0c\u6309\u56de\u8f66\u952e\uff09\uff0c\u8f93\u5165&#8221;java -version&#8221;\u547d\u4ee4\uff0c\u5982\u679c\u80fd\u591f\u6b63\u786e\u663e\u793aJava\u7248\u672c\u4fe1\u606f\uff0c\u5219\u8bf4\u660e\u5b89\u88c5\u6210\u529f\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u6837\uff0c\u4f60\u5c31\u6210\u529f\u5730\u5728Windows\u4e0a\u5b89\u88c5\u4e86Java\u5f00\u53d1\u73af\u5883\u3002\u73b0\u5728\u4f60\u53ef\u4ee5\u5f00\u59cb\u7f16\u5199\u548c\u8fd0\u884cJava\u7a0b\u5e8f\u4e86\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91ca\u5728Linux\u5b89\u88c5Java\u5f00\u53d1\u73af\u5883\uff08JDK\uff09<\/p>\n\n\n\n<p>\u5728Linux\u4e0a\u5b89\u88c5Java\u5f00\u53d1\u73af\u5883\uff08JDK\uff09\u4e5f\u5f88\u7b80\u5355\uff0c\u53ea\u9700\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6253\u5f00Oracle\u5b98\u65b9\u7f51\u7ad9\uff08<a href=\"https:\/\/www.oracle.com\/java\/technologies\/javase-downloads.html%EF%BC%89%EF%BC%8C%E9%80%89%E6%8B%A9%E9%80%82%E5%90%88%E4%BD%A0%E7%9A%84%E6%93%8D%E4%BD%9C%E7%B3%BB%E7%BB%9F%E7%89%88%E6%9C%AC%E7%9A%84JDK%E4%B8%8B%E8%BD%BD%E9%93%BE%E6%8E%A5%E3%80%82%E6%B3%A8%E6%84%8F%EF%BC%8CLinux%E4%B8%8A%E4%B8%80%E8%88%AC%E4%BD%BF%E7%94%A8.tar.gz%E6%88%96.rpm%E6%A0%BC%E5%BC%8F%E7%9A%84%E5%AE%89%E8%A3%85%E5%8C%85%E3%80%82\">https:\/\/www.oracle.com\/java\/technologies\/javase-downloads.html\uff09\uff0c\u9009\u62e9\u9002\u5408\u4f60\u7684\u64cd\u4f5c\u7cfb\u7edf\u7248\u672c\u7684JDK\u4e0b\u8f7d\u94fe\u63a5\u3002\u6ce8\u610f\uff0cLinux\u4e0a\u4e00\u822c\u4f7f\u7528.tar.gz\u6216.rpm\u683c\u5f0f\u7684\u5b89\u88c5\u5305\u3002<\/a><\/li>\n\n\n\n<li>\u4e0b\u8f7d\u5b8c\u6210\u540e\uff0c\u6253\u5f00\u7ec8\u7aef\uff08Terminal\uff09\u7a97\u53e3\uff0c\u8fdb\u5165\u4e0b\u8f7d\u76ee\u5f55\uff0c\u89e3\u538b\u5b89\u88c5\u5305\u3002\u89e3\u538b\u547d\u4ee4\u4e3a\uff1aCopy code<code>tar -zxvf jdk-11.0.2_linux-x64_bin.tar.gz <\/code>\u6ce8\u610f\uff0c\u8fd9\u91cc\u7684\u201cjdk-11.0.2_linux-x64_bin.tar.gz\u201d\u5e94\u8be5\u66ff\u6362\u4e3a\u4f60\u4e0b\u8f7d\u7684\u5b9e\u9645\u6587\u4ef6\u540d\u3002<\/li>\n\n\n\n<li>\u5c06\u89e3\u538b\u540e\u7684JDK\u76ee\u5f55\u79fb\u52a8\u5230\u4e00\u4e2a\u5408\u9002\u7684\u4f4d\u7f6e\uff0c\u6bd4\u5982\/opt\u76ee\u5f55\u4e0b\uff1abashCopy code<code>sudo mv jdk-11.0.2 \/opt\/<\/code><\/li>\n\n\n\n<li>\u914d\u7f6e\u73af\u5883\u53d8\u91cf\u3002\u4e3a\u4e86\u8ba9\u7cfb\u7edf\u80fd\u591f\u627e\u5230Java\u5f00\u53d1\u73af\u5883\uff0c\u9700\u8981\u5728\u7cfb\u7edf\u7684\u73af\u5883\u53d8\u91cf\u4e2d\u914d\u7f6eJava\u7684\u5b89\u88c5\u8def\u5f84\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1aa. \u6253\u5f00\/etc\/profile\u6587\u4ef6\uff1abashCopy code<code>sudo nano \/etc\/profile <\/code>b. \u5728\u6587\u4ef6\u672b\u5c3e\u6dfb\u52a0\u5982\u4e0b\u4ee3\u7801\uff1abashCopy code<code>export JAVA_HOME=\/opt\/jdk-11.0.2 export PATH=$JAVA_HOME\/bin:$PATH <\/code>\u6ce8\u610f\uff0c\u8fd9\u91cc\u7684\/opt\/jdk-11.0.2\u5e94\u8be5\u66ff\u6362\u4e3a\u4f60\u5b9e\u9645\u7684\u5b89\u88c5\u76ee\u5f55\u3002c. \u4fdd\u5b58\u5e76\u5173\u95ed\u6587\u4ef6\u3002d. \u5237\u65b0\u73af\u5883\u53d8\u91cf\uff1abashCopy code<code>source \/etc\/profile<\/code><\/li>\n\n\n\n<li>\u9a8c\u8bc1\u662f\u5426\u5b89\u88c5\u6210\u529f\u3002\u6253\u5f00\u7ec8\u7aef\u7a97\u53e3\uff0c\u8f93\u5165&#8221;java -version&#8221;\u547d\u4ee4\uff0c\u5982\u679c\u80fd\u591f\u6b63\u786e\u663e\u793aJava\u7248\u672c\u4fe1\u606f\uff0c\u5219\u8bf4\u660e\u5b89\u88c5\u6210\u529f\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u6837\uff0c\u4f60\u5c31\u6210\u529f\u5730\u5728Linux\u4e0a\u5b89\u88c5\u4e86Java\u5f00\u53d1\u73af\u5883\u3002\u73b0\u5728\u4f60\u53ef\u4ee5\u5f00\u59cb\u7f16\u5199\u548c\u8fd0\u884cJava\u7a0b\u5e8f\u4e86\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91ca\u5728Mac\u5b89\u88c5Java\u5f00\u53d1\u73af\u5883\uff08JDK\uff09<\/p>\n\n\n\n<p>\u5728Mac\u4e0a\u5b89\u88c5Java\u5f00\u53d1\u73af\u5883\uff08JDK\uff09\u4e5f\u5f88\u7b80\u5355\uff0c\u53ea\u9700\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6253\u5f00Oracle\u5b98\u65b9\u7f51\u7ad9\uff08<a href=\"https:\/\/www.oracle.com\/java\/technologies\/javase-downloads.html%EF%BC%89%EF%BC%8C%E9%80%89%E6%8B%A9%E9%80%82%E5%90%88%E4%BD%A0%E7%9A%84%E6%93%8D%E4%BD%9C%E7%B3%BB%E7%BB%9F%E7%89%88%E6%9C%AC%E7%9A%84JDK%E4%B8%8B%E8%BD%BD%E9%93%BE%E6%8E%A5%E3%80%82%E6%B3%A8%E6%84%8F%EF%BC%8CMac%E4%B8%8A%E4%B8%80%E8%88%AC%E4%BD%BF%E7%94%A8.dmg%E6%A0%BC%E5%BC%8F%E7%9A%84%E5%AE%89%E8%A3%85%E5%8C%85%E3%80%82\">https:\/\/www.oracle.com\/java\/technologies\/javase-downloads.html\uff09\uff0c\u9009\u62e9\u9002\u5408\u4f60\u7684\u64cd\u4f5c\u7cfb\u7edf\u7248\u672c\u7684JDK\u4e0b\u8f7d\u94fe\u63a5\u3002\u6ce8\u610f\uff0cMac\u4e0a\u4e00\u822c\u4f7f\u7528.dmg\u683c\u5f0f\u7684\u5b89\u88c5\u5305\u3002<\/a><\/li>\n\n\n\n<li>\u4e0b\u8f7d\u5b8c\u6210\u540e\uff0c\u53cc\u51fb\u4e0b\u8f7d\u7684JDK\u5b89\u88c5\u6587\u4ef6\uff0c\u6309\u7167\u63d0\u793a\u5b8c\u6210\u5b89\u88c5\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cJDK\u4f1a\u88ab\u5b89\u88c5\u5728&#8221;\/Library\/Java\/JavaVirtualMachines&#8221;\u76ee\u5f55\u4e0b\u3002<\/li>\n\n\n\n<li>\u914d\u7f6e\u73af\u5883\u53d8\u91cf\u3002\u4e3a\u4e86\u8ba9\u7cfb\u7edf\u80fd\u591f\u627e\u5230Java\u5f00\u53d1\u73af\u5883\uff0c\u9700\u8981\u5728\u7cfb\u7edf\u7684\u73af\u5883\u53d8\u91cf\u4e2d\u914d\u7f6eJava\u7684\u5b89\u88c5\u8def\u5f84\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1aa. \u6253\u5f00\u7ec8\u7aef\uff08Terminal\uff09\u7a97\u53e3\u3002b. \u6253\u5f00.bash_profile\u6587\u4ef6\uff1abashCopy code<code>nano ~\/.bash_profile <\/code>c. \u5728\u6587\u4ef6\u672b\u5c3e\u6dfb\u52a0\u5982\u4e0b\u4ee3\u7801\uff1abashCopy code<code>export JAVA_HOME=$(\/usr\/libexec\/java_home) export PATH=$JAVA_HOME\/bin:$PATH <\/code>d. \u4fdd\u5b58\u5e76\u5173\u95ed\u6587\u4ef6\u3002e. \u5237\u65b0\u73af\u5883\u53d8\u91cf\uff1abashCopy code<code>source ~\/.bash_profile<\/code><\/li>\n\n\n\n<li>\u9a8c\u8bc1\u662f\u5426\u5b89\u88c5\u6210\u529f\u3002\u6253\u5f00\u7ec8\u7aef\u7a97\u53e3\uff0c\u8f93\u5165&#8221;java -version&#8221;\u547d\u4ee4\uff0c\u5982\u679c\u80fd\u591f\u6b63\u786e\u663e\u793aJava\u7248\u672c\u4fe1\u606f\uff0c\u5219\u8bf4\u660e\u5b89\u88c5\u6210\u529f\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u6837\uff0c\u4f60\u5c31\u6210\u529f\u5730\u5728Mac\u4e0a\u5b89\u88c5\u4e86Java\u5f00\u53d1\u73af\u5883\u3002\u73b0\u5728\u4f60\u53ef\u4ee5\u5f00\u59cb\u7f16\u5199\u548c\u8fd0\u884cJava\u7a0b\u5e8f\u4e86\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91ca\u914d\u7f6eJava\u5f00\u53d1\u73af\u5883<\/p>\n\n\n\n<p>\u914d\u7f6eJava\u5f00\u53d1\u73af\u5883\u662f\u6307\u5728\u7535\u8111\u4e0a\u5b89\u88c5Java\u5f00\u53d1\u5de5\u5177\u548c\u5fc5\u8981\u7684\u5e93\u6587\u4ef6\uff0c\u4ee5\u4fbf\u80fd\u591f\u7f16\u5199\u3001\u7f16\u8bd1\u548c\u8fd0\u884cJava\u7a0b\u5e8f\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5b89\u88c5Java\u5f00\u53d1\u73af\u5883\uff08JDK\uff09\u3002Java\u5f00\u53d1\u73af\u5883\uff08JDK\uff09\u662f\u5f00\u53d1Java\u7a0b\u5e8f\u7684\u5fc5\u5907\u5de5\u5177\uff0c\u56e0\u6b64\u9700\u8981\u9996\u5148\u5b89\u88c5JDK\u3002\u5b89\u88c5\u65b9\u6cd5\u53ef\u4ee5\u53c2\u8003\u64cd\u4f5c\u7cfb\u7edf\u5bf9\u5e94\u7684\u5b89\u88c5\u6559\u7a0b\u3002<\/li>\n\n\n\n<li>\u914d\u7f6e\u73af\u5883\u53d8\u91cf\u3002\u4e3a\u4e86\u8ba9\u7cfb\u7edf\u80fd\u591f\u627e\u5230Java\u5f00\u53d1\u73af\u5883\uff0c\u9700\u8981\u5728\u7cfb\u7edf\u7684\u73af\u5883\u53d8\u91cf\u4e2d\u914d\u7f6eJava\u7684\u5b89\u88c5\u8def\u5f84\u3002\u5177\u4f53\u65b9\u6cd5\u5982\u4e0b\uff1aa. Windows\u73af\u5883\u4e0b\uff1ai. \u6253\u5f00\u201c\u63a7\u5236\u9762\u677f\u201d\uff0c\u8fdb\u5165\u201c\u7cfb\u7edf\u548c\u5b89\u5168\u201d\uff0c\u9009\u62e9\u201c\u7cfb\u7edf\u201d\u3002ii. \u5728\u5de6\u4fa7\u9762\u677f\u4e2d\uff0c\u9009\u62e9\u201c\u9ad8\u7ea7\u7cfb\u7edf\u8bbe\u7f6e\u201d\u3002iii. \u5728\u201c\u9ad8\u7ea7\u201d\u9009\u9879\u5361\u4e0b\uff0c\u70b9\u51fb\u201c\u73af\u5883\u53d8\u91cf\u201d\u6309\u94ae\u3002iv. \u5728\u201c\u7cfb\u7edf\u53d8\u91cf\u201d\u533a\u57df\u4e2d\uff0c\u627e\u5230\u201cPath\u201d\u53d8\u91cf\uff0c\u53cc\u51fb\u6253\u5f00\u7f16\u8f91\u754c\u9762\u3002v. \u5728\u7f16\u8f91\u754c\u9762\u7684\u201c\u53d8\u91cf\u503c\u201d\u6587\u672c\u6846\u4e2d\uff0c\u6dfb\u52a0Java\u7684bin\u76ee\u5f55\u7684\u8def\u5f84\u3002\u4f8b\u5982\uff0c\u5982\u679cJDK\u5b89\u88c5\u5728\u9ed8\u8ba4\u76ee\u5f55\u4e0b\uff0c\u5e94\u8be5\u6dfb\u52a0\u201cC:\\Program Files\\Java\\jdk1.8.0_241\\bin\u201d\uff08\u6ce8\u610f\u7248\u672c\u53f7\u53ef\u80fd\u4f1a\u4e0d\u540c\uff09\u3002vi. \u70b9\u51fb\u201c\u786e\u5b9a\u201d\u4fdd\u5b58\u4fee\u6539\u3002b. Linux\u548cMac\u73af\u5883\u4e0b\uff1ai. \u6253\u5f00\u7ec8\u7aef\uff08Terminal\uff09\u7a97\u53e3\u3002ii. \u6253\u5f00.bash_profile\u6587\u4ef6\uff1agoCopy code<code> ``` nano ~\/.bash_profile ``` <\/code>iii. \u5728\u6587\u4ef6\u672b\u5c3e\u6dfb\u52a0\u5982\u4e0b\u4ee3\u7801\uff1abashCopy code<code> ``` export JAVA_HOME=$(\/usr\/libexec\/java_home) export PATH=$JAVA_HOME\/bin:$PATH ``` <\/code>iv. \u4fdd\u5b58\u5e76\u5173\u95ed\u6587\u4ef6\u3002v. \u5237\u65b0\u73af\u5883\u53d8\u91cf\uff1agoCopy code<code> ``` source ~\/.bash_profile ```<\/code><\/li>\n\n\n\n<li>\u5b89\u88c5\u5f00\u53d1\u5de5\u5177\u3002Java\u5f00\u53d1\u5de5\u5177\u53ef\u4ee5\u5e2e\u52a9\u4f60\u66f4\u8f7b\u677e\u5730\u7f16\u5199Java\u7a0b\u5e8f\u3002\u5e38\u7528\u7684Java\u5f00\u53d1\u5de5\u5177\u6709Eclipse\u3001IntelliJ IDEA\u3001NetBeans\u7b49\uff0c\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u559c\u597d\u548c\u9700\u8981\u8fdb\u884c\u9009\u62e9\u548c\u5b89\u88c5\u3002<\/li>\n\n\n\n<li>\u9a8c\u8bc1\u662f\u5426\u914d\u7f6e\u6210\u529f\u3002\u6253\u5f00\u7ec8\u7aef\uff08Terminal\uff09\u7a97\u53e3\uff0c\u8f93\u5165\u201cjava -version\u201d\u547d\u4ee4\uff0c\u5982\u679c\u80fd\u591f\u6b63\u786e\u663e\u793aJava\u7248\u672c\u4fe1\u606f\uff0c\u5219\u8bf4\u660e\u914d\u7f6e\u6210\u529f\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u8fd9\u6837\uff0c\u4f60\u5c31\u6210\u529f\u5730\u914d\u7f6e\u4e86Java\u5f00\u53d1\u73af\u5883\u3002\u73b0\u5728\u4f60\u53ef\u4ee5\u5f00\u59cb\u7f16\u5199\u548c\u8fd0\u884cJava\u7a0b\u5e8f\u4e86\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u6570\u636e\u7c7b\u578b\u548c\u53d8\u91cf<\/p>\n\n\n\n<p>Java\u662f\u4e00\u79cd\u5f3a\u7c7b\u578b\u8bed\u8a00\uff0c\u6bcf\u4e2a\u53d8\u91cf\u90fd\u5fc5\u987b\u5148\u58f0\u660e\u5176\u6570\u636e\u7c7b\u578b\uff0c\u7136\u540e\u624d\u80fd\u4f7f\u7528\u3002Java\u652f\u6301\u7684\u6570\u636e\u7c7b\u578b\u5305\u62ec\u57fa\u672c\u6570\u636e\u7c7b\u578b\u548c\u5f15\u7528\u6570\u636e\u7c7b\u578b\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u6570\u636e\u7c7b\u578b Java\u57fa\u672c\u6570\u636e\u7c7b\u578b\u5305\u62ec\u4ee5\u4e0b8\u79cd\u7c7b\u578b\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6574\u578b\uff08int\u3001short\u3001long\u3001byte\uff09\uff1a\u8868\u793a\u6574\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e8c\u8fdb\u5236\u3001\u516b\u8fdb\u5236\u3001\u5341\u8fdb\u5236\u548c\u5341\u516d\u8fdb\u5236\u8868\u793a\u3002<\/li>\n\n\n\n<li>\u6d6e\u70b9\u578b\uff08float\u3001double\uff09\uff1a\u8868\u793a\u5b9e\u6570\uff0c\u4f7f\u7528\u6d6e\u70b9\u6570\u8868\u793a\u6cd5\u8868\u793a\u3002<\/li>\n\n\n\n<li>\u5b57\u7b26\u578b\uff08char\uff09\uff1a\u8868\u793a\u5355\u4e2a\u5b57\u7b26\uff0c\u4f7f\u7528\u5355\u5f15\u53f7\u8868\u793a\u3002<\/li>\n\n\n\n<li>\u5e03\u5c14\u578b\uff08boolean\uff09\uff1a\u8868\u793a\u903b\u8f91\u503c\uff0c\u53d6\u503c\u4e3atrue\u6216false\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5f15\u7528\u6570\u636e\u7c7b\u578b Java\u5f15\u7528\u6570\u636e\u7c7b\u578b\u5305\u62ec\u4ee5\u4e0b\u7c7b\u578b\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7c7b\uff08class\uff09\uff1a\u8868\u793a\u4e00\u4e2a\u7c7b\u3002<\/li>\n\n\n\n<li>\u63a5\u53e3\uff08interface\uff09\uff1a\u8868\u793a\u4e00\u4e2a\u63a5\u53e3\u3002<\/li>\n\n\n\n<li>\u6570\u7ec4\uff08array\uff09\uff1a\u8868\u793a\u4e00\u4e2a\u6570\u7ec4\u3002<\/li>\n\n\n\n<li>\u679a\u4e3e\uff08enum\uff09\uff1a\u8868\u793a\u4e00\u4e2a\u679a\u4e3e\u7c7b\u578b\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u53d8\u91cf \u5728Java\u4e2d\uff0c\u53d8\u91cf\u662f\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u503c\u7684\u5bb9\u5668\uff0c\u53ef\u4ee5\u5206\u4e3a\u5c40\u90e8\u53d8\u91cf\u548c\u6210\u5458\u53d8\u91cf\uff08\u4e5f\u79f0\u4e3a\u5b9e\u4f8b\u53d8\u91cf\u6216\u7c7b\u53d8\u91cf\uff09\u3002\n<ul class=\"wp-block-list\">\n<li>\u5c40\u90e8\u53d8\u91cf\uff1a\u5728\u65b9\u6cd5\u6216\u8bed\u53e5\u5757\u5185\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u53ea\u5728\u8be5\u65b9\u6cd5\u6216\u8bed\u53e5\u5757\u5185\u6709\u6548\u3002<\/li>\n\n\n\n<li>\u6210\u5458\u53d8\u91cf\uff1a\u5728\u7c7b\u5185\u90e8\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u53ef\u88ab\u7c7b\u7684\u6240\u6709\u65b9\u6cd5\u548c\u8bed\u53e5\u5757\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u5728\u58f0\u660e\u53d8\u91cf\u65f6\uff0c\u9700\u8981\u6307\u5b9a\u53d8\u91cf\u7684\u6570\u636e\u7c7b\u578b\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>int age = 20;  \/\/ \u5b9a\u4e49\u4e00\u4e2a\u6574\u578b\u53d8\u91cfage\uff0c\u521d\u59cb\u503c\u4e3a20\ndouble salary = 1000.0;  \/\/ \u5b9a\u4e49\u4e00\u4e2a\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b\u53d8\u91cfsalary\uff0c\u521d\u59cb\u503c\u4e3a1000.0\nchar gender = 'M';  \/\/ \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u578b\u53d8\u91cfgender\uff0c\u521d\u59cb\u503c\u4e3a'M'\nboolean isEmployed = true;  \/\/ \u5b9a\u4e49\u4e00\u4e2a\u5e03\u5c14\u578b\u53d8\u91cfisEmployed\uff0c\u521d\u59cb\u503c\u4e3atrue\n<\/code><\/pre>\n\n\n\n<p>\u53d8\u91cf\u7684\u503c\u53ef\u4ee5\u968f\u65f6\u4fee\u6539\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>age = 30;  \/\/ \u5c06age\u53d8\u91cf\u7684\u503c\u4fee\u6539\u4e3a30\nsalary = 2000.0;  \/\/ \u5c06salary\u53d8\u91cf\u7684\u503c\u4fee\u6539\u4e3a2000.0\n<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u5c31\u662fJava\u6570\u636e\u7c7b\u578b\u548c\u53d8\u91cf\u7684\u57fa\u672c\u6982\u5ff5\u3002\u5728\u7f16\u5199Java\u7a0b\u5e8f\u65f6\uff0c\u9700\u8981\u6839\u636e\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7c7b\u578b\u548c\u53d8\u91cf\u6765\u5b58\u50a8\u548c\u5904\u7406\u6570\u636e\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f<\/p>\n\n\n\n<p>Java\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f\u662fJava\u4e2d\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u7528\u4e8e\u8fdb\u884c\u5404\u79cd\u6570\u5b66\u548c\u903b\u8f91\u8fd0\u7b97\u3002\u4e0b\u9762\u5206\u522b\u5bf9Java\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f\u8fdb\u884c\u8be6\u7ec6\u89e3\u91ca\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Java\u8fd0\u7b97\u7b26 Java\u8fd0\u7b97\u7b26\u662f\u7528\u4e8e\u5728\u8868\u8fbe\u5f0f\u4e2d\u6267\u884c\u5404\u79cd\u6570\u5b66\u3001\u6bd4\u8f83\u548c\u903b\u8f91\u8fd0\u7b97\u7684\u7b26\u53f7\u6216\u5173\u952e\u5b57\u3002Java\u8fd0\u7b97\u7b26\u5206\u4e3a\u4ee5\u4e0b\u51e0\u7c7b\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7b97\u672f\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u6267\u884c\u57fa\u672c\u7b97\u672f\u8fd0\u7b97\uff0c\u5982\u52a0\u3001\u51cf\u3001\u4e58\u3001\u9664\u3001\u53d6\u4f59\u7b49\u3002\u4f8b\u5982\uff1a+\u3001-\u3001*\u3001\/\u3001%\u3002<\/li>\n\n\n\n<li>\u5173\u7cfb\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u7684\u5927\u5c0f\u5173\u7cfb\uff0c\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\u3002\u4f8b\u5982\uff1a&lt;\u3001&gt;\u3001&lt;=\u3001&gt;=\u3001==\u3001!=\u3002<\/li>\n\n\n\n<li>\u903b\u8f91\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u7ec4\u5408\u548c\u64cd\u4f5c\u903b\u8f91\u503c\uff0c\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\u3002\u4f8b\u5982\uff1a&amp;&amp;\uff08\u903b\u8f91\u4e0e\uff09\u3001||\uff08\u903b\u8f91\u6216\uff09\u3001\uff01\uff08\u903b\u8f91\u975e\uff09\u3002<\/li>\n\n\n\n<li>\u8d4b\u503c\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u5c06\u4e00\u4e2a\u503c\u8d4b\u7ed9\u4e00\u4e2a\u53d8\u91cf\u3002\u4f8b\u5982\uff1a=\u3001+=\u3001-=\u3001*=\u3001\/=\u3002<\/li>\n\n\n\n<li>\u4f4d\u8fd0\u7b97\u7b26\uff1a\u7528\u4e8e\u5bf9\u4e8c\u8fdb\u5236\u6570\u8fdb\u884c\u4f4d\u8fd0\u7b97\u3002\u4f8b\u5982\uff1a&amp;\u3001|\u3001^\u3001~\u3001&lt;&lt;\u3001&gt;&gt;\u3001&gt;&gt;&gt;\u3002<\/li>\n\n\n\n<li>\u5176\u4ed6\u8fd0\u7b97\u7b26\uff1a\u5305\u62ec\u4e09\u5143\u8fd0\u7b97\u7b26\uff08?:\uff09\u3001 instanceof\u8fd0\u7b97\u7b26\uff08\u7528\u4e8e\u6d4b\u8bd5\u5bf9\u8c61\u662f\u5426\u662f\u7c7b\u7684\u5b9e\u4f8b\uff09\u3001++\uff08\u81ea\u589e\uff09\u548c&#8211;\uff08\u81ea\u51cf\uff09\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Java\u8868\u8fbe\u5f0f Java\u8868\u8fbe\u5f0f\u662f\u7531\u8fd0\u7b97\u7b26\u3001\u64cd\u4f5c\u6570\u548c\u5176\u4ed6\u8868\u8fbe\u5f0f\u7ec4\u6210\u7684\u7ed3\u6784\u3002Java\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5305\u542b\u5404\u79cd\u7c7b\u578b\u7684\u8fd0\u7b97\u7b26\uff0c\u4f8b\u5982\u7b97\u672f\u8fd0\u7b97\u7b26\u3001\u903b\u8f91\u8fd0\u7b97\u7b26\u3001\u5173\u7cfb\u8fd0\u7b97\u7b26\u7b49\u3002Java\u8868\u8fbe\u5f0f\u53ef\u4ee5\u8fd4\u56de\u4e00\u4e2a\u503c\uff0c\u8fd9\u4e2a\u503c\u53ef\u4ee5\u662f\u5404\u79cd\u7c7b\u578b\u7684\u6570\u636e\uff0c\u4f8b\u5982\u6574\u6570\u3001\u6d6e\u70b9\u6570\u3001\u5e03\u5c14\u503c\u3001\u5b57\u7b26\u7b49\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e0b\u9762\u662f\u4e00\u4e9bJava\u8868\u8fbe\u5f0f\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2 + 3 \/\/ \u8fd4\u56de\u6574\u65705<\/li>\n\n\n\n<li>10 % 3 \/\/ \u8fd4\u56de\u6574\u65701<\/li>\n\n\n\n<li>true &amp;&amp; false \/\/ \u8fd4\u56de\u5e03\u5c14\u503cfalse<\/li>\n\n\n\n<li>&#8216;a&#8217; == &#8216;b&#8217; \/\/ \u8fd4\u56de\u5e03\u5c14\u503cfalse<\/li>\n\n\n\n<li>(10 &gt; 5) ? &#8220;yes&#8221; : &#8220;no&#8221; \/\/ \u8fd4\u56de\u5b57\u7b26\u4e32&#8221;yes&#8221;<\/li>\n<\/ul>\n\n\n\n<p>Java\u8868\u8fbe\u5f0f\u53ef\u4ee5\u7528\u5728\u5404\u79cd\u8bed\u53e5\u4e2d\uff0c\u4f8b\u5982\u8d4b\u503c\u8bed\u53e5\u3001\u6761\u4ef6\u8bed\u53e5\u3001\u5faa\u73af\u8bed\u53e5\u7b49\uff0c\u7528\u4e8e\u5b9e\u73b0\u5404\u79cd\u7b97\u6cd5\u548c\u903b\u8f91\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u5c31\u662fJava\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f\u7684\u57fa\u672c\u6982\u5ff5\u3002\u5728\u7f16\u5199Java\u7a0b\u5e8f\u65f6\uff0c\u9700\u8981\u7075\u6d3b\u8fd0\u7528\u5404\u79cd\u8fd0\u7b97\u7b26\u548c\u8868\u8fbe\u5f0f\uff0c\u4ee5\u5b9e\u73b0\u5404\u79cd\u7b97\u6cd5\u548c\u903b\u8f91\u64cd\u4f5c\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u63a7\u5236\u6d41\u8bed\u53e5if<\/p>\n\n\n\n<p>Java\u4e2d\u7684if\u8bed\u53e5\u662f\u4e00\u79cd\u7528\u4e8e\u63a7\u5236\u7a0b\u5e8f\u6d41\u7a0b\u7684\u6761\u4ef6\u8bed\u53e5\u3002if\u8bed\u53e5\u6839\u636e\u7ed9\u5b9a\u7684\u6761\u4ef6\u6765\u51b3\u5b9a\u662f\u5426\u6267\u884c\u7279\u5b9a\u7684\u4ee3\u7801\u5757\u3002\u4ee5\u4e0b\u662fif\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">rubyCopy code<code>if (\u6761\u4ef6) {\n    \/\/ \u6761\u4ef6\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728if\u8bed\u53e5\u4e2d\uff0c\u6761\u4ef6\u662f\u4e00\u4e2a\u5e03\u5c14\u8868\u8fbe\u5f0f\uff0c\u5b83\u7684\u503c\u4e3atrue\u6216false\u3002\u5982\u679c\u6761\u4ef6\u4e3atrue\uff0c\u5219\u6267\u884c\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\uff1b\u5426\u5219\uff0c\u8df3\u8fc7\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\uff0c\u7ee7\u7eed\u6267\u884c\u540e\u9762\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<p>if\u8bed\u53e5\u53ef\u4ee5\u4f7f\u7528else\u5b50\u53e5\u6765\u63d0\u4f9b\u5728\u6761\u4ef6\u4e3afalse\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">rubyCopy code<code>if (\u6761\u4ef6) {\n    \/\/ \u6761\u4ef6\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n} else {\n    \/\/ \u6761\u4ef6\u4e3afalse\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u6761\u4ef6\u4e3atrue\uff0c\u5219\u6267\u884cif\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\uff1b\u5426\u5219\uff0c\u6267\u884celse\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\u3002<\/p>\n\n\n\n<p>if\u8bed\u53e5\u53ef\u4ee5\u5d4c\u5957\u4f7f\u7528\uff0c\u5373\u5728if\u4ee3\u7801\u5757\u4e2d\u5d4c\u5957if\u8bed\u53e5\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">rubyCopy code<code>if (\u6761\u4ef61) {\n    \/\/ \u6761\u4ef61\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n    if (\u6761\u4ef62) {\n        \/\/ \u6761\u4ef62\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n    }\n} else {\n    \/\/ \u6761\u4ef61\u4e3afalse\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u6761\u4ef61\u4e3atrue\uff0c\u5219\u6267\u884c\u5916\u5c42if\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\uff1b\u5982\u679c\u6761\u4ef61\u4e3afalse\uff0c\u5219\u6267\u884celse\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\u3002\u5982\u679c\u6761\u4ef61\u4e3atrue\uff0c\u5e76\u4e14\u6761\u4ef62\u4e5f\u4e3atrue\uff0c\u5219\u6267\u884c\u5185\u5c42if\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\u3002<\/p>\n\n\n\n<p>if\u8bed\u53e5\u8fd8\u53ef\u4ee5\u4f7f\u7528else if\u5b50\u53e5\u6765\u6d4b\u8bd5\u591a\u4e2a\u6761\u4ef6\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">rubyCopy code<code>if (\u6761\u4ef61) {\n    \/\/ \u6761\u4ef61\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n} else if (\u6761\u4ef62) {\n    \/\/ \u6761\u4ef62\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n} else if (\u6761\u4ef63) {\n    \/\/ \u6761\u4ef63\u4e3atrue\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n} else {\n    \/\/ \u6240\u6709\u6761\u4ef6\u90fd\u4e3afalse\u65f6\u6267\u884c\u7684\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u6761\u4ef61\u4e3atrue\uff0c\u5219\u6267\u884c\u7b2c\u4e00\u4e2aif\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\uff1b\u5982\u679c\u6761\u4ef61\u4e3afalse\uff0c\u5e76\u4e14\u6761\u4ef62\u4e3atrue\uff0c\u5219\u6267\u884c\u7b2c\u4e8c\u4e2aelse if\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\uff1b\u4ee5\u6b64\u7c7b\u63a8\u3002\u5982\u679c\u6240\u6709\u6761\u4ef6\u90fd\u4e3afalse\uff0c\u5219\u6267\u884celse\u4ee3\u7801\u5757\u4e2d\u7684\u8bed\u53e5\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u5c31\u662fif\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\u548c\u7528\u6cd5\u3002if\u8bed\u53e5\u662fJava\u4e2d\u6700\u57fa\u672c\u548c\u5e38\u7528\u7684\u63a7\u5236\u6d41\u8bed\u53e5\u4e4b\u4e00\uff0c\u5728\u7f16\u5199Java\u7a0b\u5e8f\u65f6\u9700\u8981\u719f\u7ec3\u638c\u63e1\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u63a7\u5236\u6d41\u8bed\u53e5for<\/p>\n\n\n\n<p>Java\u4e2d\u7684for\u8bed\u53e5\u662f\u4e00\u79cd\u7528\u4e8e\u5faa\u73af\u6267\u884c\u7279\u5b9a\u4ee3\u7801\u5757\u7684\u63a7\u5236\u6d41\u8bed\u53e5\u3002for\u8bed\u53e5\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5faa\u73af\u8ba1\u6570\u5668\uff0c\u7528\u4e8e\u63a7\u5236\u5faa\u73af\u7684\u6b21\u6570\u3002\u4ee5\u4e0b\u662ffor\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopy code<code>for (\u521d\u59cb\u5316\u8868\u8fbe\u5f0f; \u5faa\u73af\u6761\u4ef6; \u66f4\u65b0\u8868\u8fbe\u5f0f) {\n    \/\/ \u5faa\u73af\u4f53\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728for\u8bed\u53e5\u4e2d\uff0c\u521d\u59cb\u5316\u8868\u8fbe\u5f0f\u662f\u5728\u5faa\u73af\u5f00\u59cb\u4e4b\u524d\u6267\u884c\u7684\u8868\u8fbe\u5f0f\uff0c\u7528\u4e8e\u521d\u59cb\u5316\u5faa\u73af\u8ba1\u6570\u5668\u3002\u5faa\u73af\u6761\u4ef6\u662f\u4e00\u4e2a\u5e03\u5c14\u8868\u8fbe\u5f0f\uff0c\u7528\u4e8e\u6d4b\u8bd5\u5faa\u73af\u8ba1\u6570\u5668\u7684\u503c\u662f\u5426\u6ee1\u8db3\u6761\u4ef6\u3002\u66f4\u65b0\u8868\u8fbe\u5f0f\u662f\u5728\u6bcf\u6b21\u5faa\u73af\u7ed3\u675f\u4e4b\u524d\u6267\u884c\u7684\u8868\u8fbe\u5f0f\uff0c\u7528\u4e8e\u66f4\u65b0\u5faa\u73af\u8ba1\u6570\u5668\u7684\u503c\u3002\u5faa\u73af\u4f53\u4ee3\u7801\u5757\u662f\u5728\u6bcf\u6b21\u5faa\u73af\u4e2d\u6267\u884c\u7684\u8bed\u53e5\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff0c\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528for\u8bed\u53e5\u5faa\u73af\u8f93\u51fa\u6570\u5b57\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">cssCopy code<code>for (int i = 0; i &lt; 10; i++) {\n    System.out.println(i);\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5faa\u73af\u8ba1\u6570\u5668i\u7684\u521d\u59cb\u503c\u4e3a0\uff0c\u5faa\u73af\u6761\u4ef6\u662fi\u5c0f\u4e8e10\uff0c\u66f4\u65b0\u8868\u8fbe\u5f0f\u662f\u6bcf\u6b21\u5faa\u73afi\u7684\u503c\u52a01\u3002\u56e0\u6b64\uff0c\u8fd9\u4e2afor\u8bed\u53e5\u5c06\u4f1a\u5faa\u73af10\u6b21\uff0c\u5206\u522b\u8f93\u51fa0\u52309\u7684\u6570\u5b57\u3002<\/p>\n\n\n\n<p>for\u8bed\u53e5\u53ef\u4ee5\u5d4c\u5957\u4f7f\u7528\uff0c\u5373\u5728for\u5faa\u73af\u4f53\u4ee3\u7801\u5757\u4e2d\u5d4c\u5957for\u8bed\u53e5\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>for (int i = 0; i &lt; 5; i++) {\n    for (int j = 0; j &lt; 5; j++) {\n        System.out.println(i + \",\" + j);\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5916\u5c42\u5faa\u73af\u8ba1\u6570\u5668i\u7684\u521d\u59cb\u503c\u4e3a0\uff0c\u5faa\u73af\u6761\u4ef6\u662fi\u5c0f\u4e8e5\uff0c\u66f4\u65b0\u8868\u8fbe\u5f0f\u662f\u6bcf\u6b21\u5faa\u73afi\u7684\u503c\u52a01\u3002\u5185\u5c42\u5faa\u73af\u8ba1\u6570\u5668j\u7684\u521d\u59cb\u503c\u4e3a0\uff0c\u5faa\u73af\u6761\u4ef6\u662fj\u5c0f\u4e8e5\uff0c\u66f4\u65b0\u8868\u8fbe\u5f0f\u662f\u6bcf\u6b21\u5faa\u73afj\u7684\u503c\u52a01\u3002\u56e0\u6b64\uff0c\u8fd9\u4e2afor\u8bed\u53e5\u5c06\u4f1a\u5faa\u73af25\u6b21\uff0c\u8f93\u51fa\u6240\u6709\u7684\u7ec4\u5408\u6570\u3002<\/p>\n\n\n\n<p>for\u8bed\u53e5\u8fd8\u53ef\u4ee5\u4f7f\u7528foreach\u8bed\u53e5\u6765\u904d\u5386\u6570\u7ec4\u6216\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">cCopy code<code>int[] array = {1, 2, 3, 4, 5};\nfor (int i : array) {\n    System.out.println(i);\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4f7f\u7528foreach\u8bed\u53e5\u5faa\u73af\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff0c\u5e76\u8f93\u51fa\u6bcf\u4e2a\u5143\u7d20\u7684\u503c\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u5c31\u662ffor\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\u548c\u7528\u6cd5\u3002for\u8bed\u53e5\u662fJava\u4e2d\u6700\u5e38\u7528\u7684\u63a7\u5236\u6d41\u8bed\u53e5\u4e4b\u4e00\uff0c\u5728\u7f16\u5199Java\u7a0b\u5e8f\u65f6\u9700\u8981\u719f\u7ec3\u638c\u63e1\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u63a7\u5236\u6d41\u8bed\u53e5while<\/p>\n\n\n\n<p>Java\u4e2d\u7684while\u8bed\u53e5\u662f\u4e00\u79cd\u7528\u4e8e\u5faa\u73af\u6267\u884c\u7279\u5b9a\u4ee3\u7801\u5757\u7684\u63a7\u5236\u6d41\u8bed\u53e5\u3002while\u8bed\u53e5\u6839\u636e\u7ed9\u5b9a\u7684\u6761\u4ef6\u5faa\u73af\u6267\u884c\u4ee3\u7801\u5757\uff0c\u76f4\u5230\u6761\u4ef6\u4e0d\u518d\u6210\u7acb\u3002\u4ee5\u4e0b\u662fwhile\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>while (\u5faa\u73af\u6761\u4ef6) {\n    \/\/ \u5faa\u73af\u4f53\u4ee3\u7801\u5757\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728while\u8bed\u53e5\u4e2d\uff0c\u5faa\u73af\u6761\u4ef6\u662f\u4e00\u4e2a\u5e03\u5c14\u8868\u8fbe\u5f0f\uff0c\u7528\u4e8e\u6d4b\u8bd5\u5faa\u73af\u6761\u4ef6\u662f\u5426\u6210\u7acb\u3002\u5982\u679c\u5faa\u73af\u6761\u4ef6\u4e3atrue\uff0c\u5219\u6267\u884c\u5faa\u73af\u4f53\u4ee3\u7801\u5757\uff1b\u5426\u5219\uff0c\u8df3\u8fc7\u5faa\u73af\u4f53\u4ee3\u7801\u5757\uff0c\u7ee7\u7eed\u6267\u884c\u540e\u9762\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff0c\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528while\u8bed\u53e5\u5faa\u73af\u8f93\u51fa\u6570\u5b57\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">cssCopy code<code>int i = 0;\nwhile (i &lt; 10) {\n    System.out.println(i);\n    i++;\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u53d8\u91cfi\u7684\u521d\u59cb\u503c\u4e3a0\uff0c\u5faa\u73af\u6761\u4ef6\u662fi\u5c0f\u4e8e10\u3002\u5728\u6bcf\u6b21\u5faa\u73af\u4e2d\uff0c\u5982\u679ci\u5c0f\u4e8e10\uff0c\u5219\u6267\u884c\u5faa\u73af\u4f53\u4ee3\u7801\u5757\uff0c\u8f93\u51fai\u7684\u503c\uff0c\u5e76\u5c06i\u52a01\uff1b\u5426\u5219\u8df3\u8fc7\u5faa\u73af\u4f53\u4ee3\u7801\u5757\uff0c\u7ee7\u7eed\u6267\u884c\u540e\u9762\u7684\u4ee3\u7801\u3002\u56e0\u6b64\uff0c\u8fd9\u4e2awhile\u8bed\u53e5\u5c06\u4f1a\u5faa\u73af10\u6b21\uff0c\u5206\u522b\u8f93\u51fa0\u52309\u7684\u6570\u5b57\u3002<\/p>\n\n\n\n<p>while\u8bed\u53e5\u53ef\u4ee5\u5d4c\u5957\u4f7f\u7528\uff0c\u5373\u5728while\u5faa\u73af\u4f53\u4ee3\u7801\u5757\u4e2d\u5d4c\u5957while\u8bed\u53e5\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>int i = 0;\nwhile (i &lt; 5) {\n    int j = 0;\n    while (j &lt; 5) {\n        System.out.println(i + \",\" + j);\n        j++;\n    }\n    i++;\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5916\u5c42\u5faa\u73af\u8ba1\u6570\u5668i\u7684\u521d\u59cb\u503c\u4e3a0\uff0c\u5faa\u73af\u6761\u4ef6\u662fi\u5c0f\u4e8e5\u3002\u5185\u5c42\u5faa\u73af\u8ba1\u6570\u5668j\u7684\u521d\u59cb\u503c\u4e3a0\uff0c\u5faa\u73af\u6761\u4ef6\u662fj\u5c0f\u4e8e5\u3002\u56e0\u6b64\uff0c\u8fd9\u4e2awhile\u8bed\u53e5\u5c06\u4f1a\u5faa\u73af25\u6b21\uff0c\u8f93\u51fa\u6240\u6709\u7684\u7ec4\u5408\u6570\u3002<\/p>\n\n\n\n<p>while\u8bed\u53e5\u8fd8\u53ef\u4ee5\u4f7f\u7528do-while\u8bed\u53e5\u6765\u5b9e\u73b0\u81f3\u5c11\u6267\u884c\u4e00\u6b21\u7684\u5faa\u73af\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>int i = 0;\ndo {\n    System.out.println(i);\n    i++;\n} while (i &lt; 10);\n<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u53d8\u91cfi\u7684\u521d\u59cb\u503c\u4e3a0\uff0c\u5faa\u73af\u6761\u4ef6\u662fi\u5c0f\u4e8e10\u3002\u5728\u6267\u884c\u5faa\u73af\u4e4b\u524d\uff0c\u5148\u6267\u884c\u4e00\u6b21\u5faa\u73af\u4f53\u4ee3\u7801\u5757\u3002\u56e0\u6b64\uff0c\u8fd9\u4e2ado-while\u8bed\u53e5\u5c06\u4f1a\u5faa\u73af10\u6b21\uff0c\u5206\u522b\u8f93\u51fa0\u52309\u7684\u6570\u5b57\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u5c31\u662fwhile\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\u548c\u7528\u6cd5\u3002while\u8bed\u53e5\u662fJava\u4e2d\u6700\u5e38\u7528\u7684\u63a7\u5236\u6d41\u8bed\u53e5\u4e4b\u4e00\uff0c\u5728\u7f16\u5199Java\u7a0b\u5e8f\u65f6\u9700\u8981\u719f\u7ec3\u638c\u63e1\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u7684\u6570\u7ec4<\/p>\n\n\n\n<p>Java\u7684\u6570\u7ec4\u662f\u4e00\u79cd\u7528\u4e8e\u5b58\u50a8\u591a\u4e2a\u76f8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u6570\u636e\u7ed3\u6784\u3002\u6570\u7ec4\u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u6574\u6570\u3001\u6d6e\u70b9\u6570\u3001\u5b57\u7b26\u3001\u5e03\u5c14\u503c\u7b49\u3002\u5728Java\u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5177\u6709\u957f\u5ea6\u5c5e\u6027\u548c\u5404\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u64cd\u4f5c\u6570\u7ec4\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662fJava\u6570\u7ec4\u7684\u57fa\u672c\u6982\u5ff5\u548c\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u58f0\u660e\u6570\u7ec4 \u5728Java\u4e2d\u58f0\u660e\u4e00\u4e2a\u6570\u7ec4\u9700\u8981\u6307\u5b9a\u6570\u7ec4\u7684\u7c7b\u578b\u548c\u6570\u7ec4\u540d\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u662f\u58f0\u660e\u4e00\u4e2a\u6574\u578b\u6570\u7ec4\u7684\u8bed\u53e5\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>int[] myArray;\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u8bed\u53e5\u58f0\u660e\u4e86\u4e00\u4e2a\u540d\u4e3amyArray\u7684\u6574\u578b\u6570\u7ec4\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u521b\u5efa\u6570\u7ec4 \u5728\u58f0\u660e\u6570\u7ec4\u4e4b\u540e\uff0c\u9700\u8981\u521b\u5efa\u6570\u7ec4\u5e76\u4e3a\u5176\u5206\u914d\u5185\u5b58\u7a7a\u95f4\u3002\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528new\u5173\u952e\u5b57\u6765\u521b\u5efa\u6570\u7ec4\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u662f\u521b\u5efa\u4e00\u4e2a\u5305\u542b5\u4e2a\u6574\u6570\u7684\u6570\u7ec4\u7684\u8bed\u53e5\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>myArray = new int[5];\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u8bed\u53e5\u521b\u5efa\u4e86\u4e00\u4e2a\u5305\u542b5\u4e2a\u6574\u6570\u7684\u6574\u578b\u6570\u7ec4\uff0c\u5e76\u5c06\u5176\u8d4b\u503c\u7ed9myArray\u53d8\u91cf\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u521d\u59cb\u5316\u6570\u7ec4 \u5728\u521b\u5efa\u6570\u7ec4\u4e4b\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0b\u6807\uff08\u7d22\u5f15\uff09\u6765\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u6570\u7ec4\u7684\u4e0b\u6807\u4ece0\u5f00\u59cb\uff0c\u4f8b\u5982\uff0cmyArray[0]\u8868\u793a\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0cmyArray[1]\u8868\u793a\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002\u53ef\u4ee5\u4f7f\u7528\u8d4b\u503c\u8bed\u53e5\u521d\u59cb\u5316\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u662f\u521d\u59cb\u5316\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u7684\u8bed\u53e5\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">cssCopy code<code>myArray[0] = 1;\nmyArray[1] = 2;\nmyArray[2] = 3;\nmyArray[3] = 4;\nmyArray[4] = 5;\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u8bed\u53e5\u5c061\u30012\u30013\u30014\u548c5\u5206\u522b\u8d4b\u503c\u7ed9\u6570\u7ec4\u4e2d\u7684\u524d5\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"4\">\n<li>\u6570\u7ec4\u7684\u957f\u5ea6 \u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528length\u5c5e\u6027\u6765\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u662f\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u7684\u8bed\u53e5\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">goCopy code<code>int len = myArray.length;\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u8bed\u53e5\u83b7\u53d6myArray\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5e76\u5c06\u5176\u8d4b\u503c\u7ed9\u53d8\u91cflen\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"5\">\n<li>\u904d\u5386\u6570\u7ec4 \u53ef\u4ee5\u4f7f\u7528for\u5faa\u73af\u6765\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u662f\u904d\u5386\u6570\u7ec4\u4e2d\u6240\u6709\u5143\u7d20\u7684\u8bed\u53e5\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">cssCopy code<code>for (int i = 0; i &lt; myArray.length; i++) {\n    System.out.println(myArray[i]);\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u8bed\u53e5\u5c06myArray\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u4f9d\u6b21\u8f93\u51fa\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"6\">\n<li>\u591a\u7ef4\u6570\u7ec4 Java\u4e2d\u7684\u6570\u7ec4\u53ef\u4ee5\u662f\u591a\u7ef4\u7684\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u662f\u4e00\u4e2a\u4e8c\u7ef4\u6574\u578b\u6570\u7ec4\u7684\u58f0\u660e\u548c\u521d\u59cb\u5316\u8bed\u53e5\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">cssCopy code<code>int[][] myArray = new int[3][3];\nmyArray[0][0] = 1;\nmyArray[0][1] = 2;\nmyArray[0][2] = 3;\nmyArray[1][0] = 4;\nmyArray[1][1] = 5;\nmyArray[1][2] = 6;\nmyArray[2][0] = 7;\nmyArray[2][1] = 8;\nmyArray[2][2] = 9;\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u8bed\u53e5\u58f0\u660e\u5e76\u521d\u59cb\u5316\u4e86<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u7684\u5176\u4ed6\u590d\u6742\u6570\u636e\u7c7b\u578b<\/p>\n\n\n\n<p>\u9664\u4e86\u6570\u7ec4\uff0cJava\u8fd8\u6709\u5176\u4ed6\u7684\u590d\u6742\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u7c7b\u3001\u63a5\u53e3\u3001\u679a\u4e3e\u548c\u6ce8\u89e3\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7c7b Java\u4e2d\u7684\u7c7b\u662f\u4e00\u79cd\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5b83\u5305\u542b\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u7c7b\u53ef\u4ee5\u770b\u4f5c\u662f\u4e00\u79cd\u84dd\u56fe\uff0c\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u3002\u901a\u8fc7\u5b9a\u4e49\u7c7b\uff0c\u53ef\u4ee5\u5c01\u88c5\u6570\u636e\u548c\u884c\u4e3a\uff0c\u5e76\u91cd\u590d\u4f7f\u7528\u8fd9\u4e9b\u5c01\u88c5\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u7c7b\u7684\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>public class Person {\n    private String name;\n    private int age;\n\n    public Person(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    public String getName() {\n        return this.name;\n    }\n\n    public int getAge() {\n        return this.age;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public void setAge(int age) {\n        this.age = age;\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u7c7b\u540d\u4e3aPerson\uff0c\u5305\u542b\u4e86\u4e24\u4e2a\u79c1\u6709\u5c5e\u6027\uff1aname\u548cage\u3002\u7c7b\u8fd8\u5305\u542b\u4e86\u4e00\u4e2a\u6784\u9020\u51fd\u6570\u548c\u56db\u4e2a\u65b9\u6cd5\uff1agetName\u3001getAge\u3001setName\u548csetAge\u3002\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u83b7\u53d6\u548c\u8bbe\u7f6e\u5bf9\u8c61\u7684\u5c5e\u6027\u503c\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u63a5\u53e3 Java\u4e2d\u7684\u63a5\u53e3\u662f\u4e00\u79cd\u7ea6\u675f\uff0c\u7528\u4e8e\u5b9a\u4e49\u4e00\u7ec4\u65b9\u6cd5\u7684\u89c4\u8303\uff0c\u800c\u4e0d\u5305\u542b\u4efb\u4f55\u5177\u4f53\u7684\u5b9e\u73b0\u3002\u63a5\u53e3\u4e2d\u7684\u6240\u6709\u65b9\u6cd5\u90fd\u662f\u516c\u5171\u7684\u3001\u62bd\u8c61\u7684\u548c\u65e0\u72b6\u6001\u7684\uff0c\u53ef\u4ee5\u88ab\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u8986\u76d6\u548c\u91cd\u5199\u3002\u901a\u8fc7\u63a5\u53e3\uff0c\u53ef\u4ee5\u5b9e\u73b0\u591a\u6001\u548c\u7075\u6d3b\u7684\u7a0b\u5e8f\u8bbe\u8ba1\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u63a5\u53e3\u7684\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public interface Animal {\n    void eat();\n    void sleep();\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u63a5\u53e3\u540d\u4e3aAnimal\uff0c\u5305\u542b\u4e86\u4e24\u4e2a\u65b9\u6cd5\uff1aeat\u548csleep\u3002\u4efb\u4f55\u5b9e\u73b0Animal\u63a5\u53e3\u7684\u7c7b\u90fd\u5fc5\u987b\u5b9e\u73b0\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u679a\u4e3e Java\u4e2d\u7684\u679a\u4e3e\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u8868\u793a\u56fa\u5b9a\u6570\u91cf\u7684\u5e38\u91cf\u503c\u3002\u679a\u4e3e\u4e2d\u7684\u6bcf\u4e2a\u503c\u90fd\u662f\u552f\u4e00\u7684\uff0c\u5e76\u5177\u6709\u81ea\u5df1\u7684\u540d\u79f0\u3002\u679a\u4e3e\u53ef\u4ee5\u7528\u4e8e\u521b\u5efa\u7c7b\u578b\u5b89\u5168\u7684\u5e38\u91cf\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u679a\u4e3e\u7684\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>public enum Weekday {\n    MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY;\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u679a\u4e3e\u540d\u4e3aWeekday\uff0c\u5305\u542b\u4e86\u4e03\u4e2a\u503c\uff1aMONDAY\u3001TUESDAY\u3001WEDNESDAY\u3001THURSDAY\u3001FRIDAY\u3001SATURDAY\u548cSUNDAY\u3002\u6bcf\u4e2a\u503c\u90fd\u662f\u552f\u4e00\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7\u679a\u4e3e\u540d\u79f0\u6765\u5f15\u7528\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"4\">\n<li>\u6ce8\u89e3 Java\u4e2d\u7684\u6ce8\u89e3\u662f\u4e00\u79cd\u5143\u6570\u636e\uff0c\u7528\u4e8e\u63cf\u8ff0\u7a0b\u5e8f\u4e2d\u7684\u6570\u636e\u3001\u7c7b\u3001\u65b9\u6cd5\u548c\u53d8\u91cf\u3002\u6ce8\u89e3\u53ef\u4ee5\u7528\u4e8e\u63d0\u4f9b\u4fe1\u606f\u3001\u6307\u793a\u7f16\u8bd1\u5668\u3001\u751f\u6210\u6587\u6863\u548c\u6267\u884c\u5176\u4ed6\u7279\u6b8a\u4efb\u52a1\u3002Java\u4e2d\u7684\u6ce8\u89e3\u4ee5@\u7b26\u53f7\u5f00\u5934\uff0c\u53ef\u4ee5\u7528\u4e8e\u7c7b\u3001\u65b9\u6cd5\u3001\u53d8\u91cf\u7b49\u5404\u79cd\u5143\u7d20\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u6ce8\u89e3\u7684\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopy code<code>public @interface MyAnnotation {\n    String name();\n    String value();\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u6ce8\u89e3\u540d\u4e3aMyAnnotation\uff0c\u5305<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u7684\u51fd\u6570\u548c\u65b9\u6cd5<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u51fd\u6570\u548c\u65b9\u6cd5\u662f\u7528\u4e8e\u6267\u884c\u7279\u5b9a\u4efb\u52a1\u7684\u4ee3\u7801\u5757\u3002\u5b83\u4eec\u90fd\u662f\u4ee3\u7801\u7684\u91cd\u7528\u673a\u5236\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u51fd\u6570\u6216\u65b9\u6cd5\u6765\u6267\u884c\u7279\u5b9a\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u51fd\u6570 \u5728Java\u4e2d\uff0c\u51fd\u6570\u901a\u5e38\u662f\u6307\u9759\u6001\u65b9\u6cd5\uff0c\u5b83\u4eec\u5c5e\u4e8e\u7c7b\u800c\u4e0d\u5c5e\u4e8e\u5bf9\u8c61\u3002\u51fd\u6570\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u8c03\u7528\uff0c\u800c\u4e0d\u9700\u8981\u521b\u5efa\u5bf9\u8c61\u3002\u51fd\u6570\u53ef\u4ee5\u6709\u8fd4\u56de\u503c\uff0c\u4e5f\u53ef\u4ee5\u662fvoid\u7c7b\u578b\uff08\u5373\u6ca1\u6709\u8fd4\u56de\u503c\uff09\u3002\u51fd\u6570\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopy code<code>[\u8bbf\u95ee\u4fee\u9970\u7b26] [static] \u8fd4\u56de\u7c7b\u578b \u51fd\u6570\u540d(\u53c2\u6570\u5217\u8868) {\n    \/\/ \u51fd\u6570\u4f53\n}\n<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d\uff0c\u8bbf\u95ee\u4fee\u9970\u7b26\u7528\u4e8e\u63a7\u5236\u51fd\u6570\u7684\u53ef\u89c1\u6027\u548c\u8bbf\u95ee\u6743\u9650\u3002static\u5173\u952e\u5b57\u7528\u4e8e\u8868\u793a\u51fd\u6570\u662f\u9759\u6001\u7684\uff0c\u5c5e\u4e8e\u7c7b\u800c\u4e0d\u5c5e\u4e8e\u5bf9\u8c61\u3002\u8fd4\u56de\u7c7b\u578b\u8868\u793a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u7c7b\u578b\uff0c\u53ef\u4ee5\u662f\u4efb\u4f55\u5408\u6cd5\u7684Java\u7c7b\u578b\u3002\u51fd\u6570\u540d\u8868\u793a\u51fd\u6570\u7684\u540d\u79f0\uff0c\u53c2\u6570\u5217\u8868\u7528\u4e8e\u4f20\u9012\u53c2\u6570\u7ed9\u51fd\u6570\u3002\u51fd\u6570\u4f53\u4e2d\u5305\u542b\u4e86\u8981\u6267\u884c\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u51fd\u6570\u7684\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>public static int add(int a, int b) {\n    return a + b;\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u51fd\u6570\u540d\u4e3aadd\uff0c\u8fd4\u56de\u7c7b\u578b\u4e3aint\uff0c\u5305\u542b\u4e24\u4e2a\u53c2\u6570\uff1aa\u548cb\u3002\u51fd\u6570\u4f53\u4e2d\u5305\u542b\u4e86\u5c06a\u548cb\u76f8\u52a0\u5e76\u8fd4\u56de\u7ed3\u679c\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u65b9\u6cd5 \u5728Java\u4e2d\uff0c\u65b9\u6cd5\u901a\u5e38\u662f\u6307\u5c5e\u4e8e\u5bf9\u8c61\u7684\u884c\u4e3a\uff0c\u5b83\u4eec\u5728\u7c7b\u7684\u5185\u90e8\u5b9a\u4e49\uff0c\u5fc5\u987b\u901a\u8fc7\u5bf9\u8c61\u6765\u8c03\u7528\u3002\u65b9\u6cd5\u53ef\u4ee5\u6709\u8fd4\u56de\u503c\uff0c\u4e5f\u53ef\u4ee5\u662fvoid\u7c7b\u578b\u3002\u65b9\u6cd5\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopy code<code>[\u8bbf\u95ee\u4fee\u9970\u7b26] \u8fd4\u56de\u7c7b\u578b \u65b9\u6cd5\u540d(\u53c2\u6570\u5217\u8868) {\n    \/\/ \u65b9\u6cd5\u4f53\n}\n<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d\uff0c\u8bbf\u95ee\u4fee\u9970\u7b26\u7528\u4e8e\u63a7\u5236\u65b9\u6cd5\u7684\u53ef\u89c1\u6027\u548c\u8bbf\u95ee\u6743\u9650\u3002\u8fd4\u56de\u7c7b\u578b\u8868\u793a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\uff0c\u53ef\u4ee5\u662f\u4efb\u4f55\u5408\u6cd5\u7684Java\u7c7b\u578b\u3002\u65b9\u6cd5\u540d\u8868\u793a\u65b9\u6cd5\u7684\u540d\u79f0\uff0c\u53c2\u6570\u5217\u8868\u7528\u4e8e\u4f20\u9012\u53c2\u6570\u7ed9\u65b9\u6cd5\u3002\u65b9\u6cd5\u4f53\u4e2d\u5305\u542b\u4e86\u8981\u6267\u884c\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u65b9\u6cd5\u7684\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public int getAge() {\n    return this.age;\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u65b9\u6cd5\u540d\u4e3agetAge\uff0c\u8fd4\u56de\u7c7b\u578b\u4e3aint\uff0c\u6ca1\u6709\u53c2\u6570\u3002\u65b9\u6cd5\u4f53\u4e2d\u5305\u542b\u4e86\u8fd4\u56de\u5bf9\u8c61\u5c5e\u6027age\u7684\u503c\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<p>\u51fd\u6570\u548c\u65b9\u6cd5\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u8c03\u7528\u65b9\u5f0f\u548c\u4f5c\u7528\u57df\u3002\u51fd\u6570\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u8c03\u7528\uff0c\u800c\u65b9\u6cd5\u5fc5\u987b\u901a\u8fc7\u5bf9\u8c61\u6765\u8c03\u7528\u3002\u51fd\u6570\u662f\u9759\u6001\u7684\uff0c\u5c5e\u4e8e\u7c7b\u800c\u4e0d\u5c5e\u4e8e\u5bf9\u8c61\uff0c\u800c\u65b9\u6cd5\u662f\u52a8\u6001\u7684\uff0c\u5c5e\u4e8e\u5bf9\u8c61\u800c\u4e0d\u5c5e\u4e8e\u7c7b\u3002\u51fd\u6570\u548c\u65b9\u6cd5\u90fd\u53ef\u4ee5\u5728Java\u4e2d\u5b9e\u73b0\u4ee3\u7801\u7684\u91cd\u7528\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u661f\u7cfb\u89e3\u91caJava\u7684\u7c7b\u548c\u5bf9\u8c61<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u7c7b\u548c\u5bf9\u8c61\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u57fa\u672c\u6982\u5ff5\u3002\u7c7b\u662f\u4e00\u4e2a\u6a21\u677f\u6216\u84dd\u56fe\uff0c\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u3002\u5bf9\u8c61\u662f\u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5177\u6709\u81ea\u5df1\u7684\u72b6\u6001\u548c\u884c\u4e3a\u3002\u4ee5\u4e0b\u662f\u5bf9Java\u7c7b\u548c\u5bf9\u8c61\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7c7b \u5728Java\u4e2d\uff0c\u7c7b\u662f\u4e00\u79cd\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u63cf\u8ff0\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u884c\u4e3a\u3002\u7c7b\u53ef\u4ee5\u770b\u4f5c\u662f\u4e00\u79cd\u84dd\u56fe\uff0c\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u3002\u7c7b\u5305\u542b\u4e86\u4e00\u4e9b\u5c5e\u6027\uff08\u4e5f\u79f0\u4e3a\u6210\u5458\u53d8\u91cf\uff09\u548c\u4e00\u4e9b\u65b9\u6cd5\uff08\u4e5f\u79f0\u4e3a\u6210\u5458\u51fd\u6570\uff09\uff0c\u7528\u4e8e\u63cf\u8ff0\u5bf9\u8c61\u7684\u7279\u5f81\u548c\u884c\u4e3a\u3002\u7c7b\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopy code<code>[\u8bbf\u95ee\u4fee\u9970\u7b26] class \u7c7b\u540d {\n    \/\/ \u7c7b\u7684\u5c5e\u6027\uff08\u6210\u5458\u53d8\u91cf\uff09\n    [\u8bbf\u95ee\u4fee\u9970\u7b26] \u7c7b\u578b \u5c5e\u6027\u540d;\n    ...\n\n    \/\/ \u7c7b\u7684\u65b9\u6cd5\uff08\u6210\u5458\u51fd\u6570\uff09\n    [\u8bbf\u95ee\u4fee\u9970\u7b26] \u8fd4\u56de\u7c7b\u578b \u65b9\u6cd5\u540d(\u53c2\u6570\u5217\u8868) {\n        \/\/ \u65b9\u6cd5\u4f53\n    }\n    ...\n}\n<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d\uff0c\u8bbf\u95ee\u4fee\u9970\u7b26\u7528\u4e8e\u63a7\u5236\u7c7b\u7684\u53ef\u89c1\u6027\u548c\u8bbf\u95ee\u6743\u9650\u3002\u6210\u5458\u53d8\u91cf\u548c\u6210\u5458\u51fd\u6570\u90fd\u5c5e\u4e8e\u7c7b\u7684\u6210\u5458\u3002\u6210\u5458\u53d8\u91cf\u7528\u4e8e\u63cf\u8ff0\u5bf9\u8c61\u7684\u72b6\u6001\uff0c\u6210\u5458\u51fd\u6570\u7528\u4e8e\u63cf\u8ff0\u5bf9\u8c61\u7684\u884c\u4e3a\u3002\u53ef\u4ee5\u901a\u8fc7\u5b9e\u4f8b\u5316\u5bf9\u8c61\u6765\u8bbf\u95ee\u6210\u5458\u53d8\u91cf\u548c\u6210\u5458\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u7c7b\u7684\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">typescriptCopy code<code>public class Person {\n    \/\/ \u7c7b\u7684\u5c5e\u6027\uff08\u6210\u5458\u53d8\u91cf\uff09\n    private String name;\n    private int age;\n\n    \/\/ \u7c7b\u7684\u65b9\u6cd5\uff08\u6210\u5458\u51fd\u6570\uff09\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public void setAge(int age) {\n        this.age = age;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public int getAge() {\n        return age;\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u7c7b\u540d\u4e3aPerson\uff0c\u5305\u542b\u4e86\u4e24\u4e2a\u79c1\u6709\u5c5e\u6027\uff1aname\u548cage\u3002\u7c7b\u8fd8\u5305\u542b\u4e86\u56db\u4e2a\u65b9\u6cd5\uff1asetName\u3001setAge\u3001getName\u548cgetAge\u3002\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u83b7\u53d6\u548c\u8bbe\u7f6e\u5bf9\u8c61\u7684\u5c5e\u6027\u503c\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u5bf9\u8c61 \u5728Java\u4e2d\uff0c\u5bf9\u8c61\u662f\u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\u3002\u5bf9\u8c61\u5177\u6709\u81ea\u5df1\u7684\u72b6\u6001\u548c\u884c\u4e3a\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\u6765\u6267\u884c\u7279\u5b9a\u7684\u884c\u4e3a\u3002\u5728Java\u4e2d\uff0c\u901a\u8fc7\u5173\u952e\u5b57new\u6765\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>Person person = new Person();\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u8bed\u53e5\u521b\u5efa\u4e86\u4e00\u4e2aPerson\u7c7b\u7684\u5bf9\u8c61\uff0c\u5e76\u5c06\u5176\u8d4b\u503c\u7ed9person\u53d8\u91cf\u3002\u53ef\u4ee5\u901a\u8fc7person\u5bf9\u8c61\u6765\u8bbf\u95eePerson\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528Person\u7c7b\u7684\u5bf9\u8c61\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopy code<code>Person person = new Person();\nperson.setName(\"Tom\");\nperson.setAge(20);\nSystem.out.println(person.getName() + \" is \" + person.getAge() + \" years old.\");\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2aPerson\u7c7b\u7684\u5bf9\u8c61\uff0c\u5e76\u8bbe\u7f6e\u4e86\u5bf9\u8c61\u7684name\u548cage\u5c5e\u6027\u3002\u7136\u540e\uff0c\u5b83\u8c03\u7528\u5bf9\u8c61\u7684getName\u548cgetAge\u65b9\u6cd5\uff0c\u5e76\u5c06\u7ed3\u679c\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u5c01\u88c5<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u5c01\u88c5\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u7528\u4e8e\u9690\u85cf\u7c7b\u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u4f7f\u5176\u4e0d\u88ab\u5916\u90e8\u8bbf\u95ee\u548c\u4fee\u6539\u3002\u5c01\u88c5\u53ef\u4ee5\u4fdd\u62a4\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u5b89\u5168\u6027\uff0c\u540c\u65f6\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u4ee5\u4e0b\u662fJava\u5c01\u88c5\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8bbf\u95ee\u4fee\u9970\u7b26 \u5728Java\u4e2d\uff0c\u8bbf\u95ee\u4fee\u9970\u7b26\u7528\u4e8e\u63a7\u5236\u7c7b\u3001\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u53ef\u89c1\u6027\u548c\u8bbf\u95ee\u6743\u9650\u3002Java\u4e2d\u6709\u56db\u79cd\u8bbf\u95ee\u4fee\u9970\u7b26\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>public\uff1a\u516c\u5171\u7684\uff0c\u4efb\u4f55\u5730\u65b9\u90fd\u53ef\u4ee5\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li>protected\uff1a\u53d7\u4fdd\u62a4\u7684\uff0c\u53ea\u6709\u540c\u4e00\u5305\u5185\u7684\u7c7b\u548c\u8be5\u7c7b\u7684\u5b50\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li>\u9ed8\u8ba4\uff08\u4e0d\u52a0\u4fee\u9970\u7b26\uff09\uff1a\u5305\u8bbf\u95ee\u6743\u9650\uff0c\u53ea\u6709\u540c\u4e00\u5305\u5185\u7684\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li>private\uff1a\u79c1\u6709\u7684\uff0c\u53ea\u6709\u8be5\u7c7b\u5185\u90e8\u53ef\u4ee5\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u901a\u8fc7\u4f7f\u7528\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u53ef\u4ee5\u9650\u5236\u5bf9\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u4ece\u800c\u5b9e\u73b0\u6570\u636e\u7684\u5c01\u88c5\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u5c01\u88c5\u5c5e\u6027 \u5728Java\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5c06\u5c5e\u6027\u8bbe\u7f6e\u4e3aprivate\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u6765\u9690\u85cf\u7c7b\u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u4f7f\u5176\u4e0d\u80fd\u88ab\u5916\u90e8\u8bbf\u95ee\u548c\u4fee\u6539\u3002\u53ef\u4ee5\u901a\u8fc7public\u7684get\u548cset\u65b9\u6cd5\uff0c\u6765\u8bbf\u95ee\u548c\u4fee\u6539\u5c5e\u6027\u7684\u503c\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">typescriptCopy code<code>public class Person {\n    private String name;\n    private int age;\n\n    public String getName() {\n        return name;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public int getAge() {\n        return age;\n    }\n\n    public void setAge(int age) {\n        if (age &lt; 0) {\n            this.age = 0;\n        } else {\n            this.age = age;\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2aPerson\u7c7b\uff0c\u5e76\u5c06name\u548cage\u5c5e\u6027\u8bbe\u7f6e\u4e3aprivate\u8bbf\u95ee\u4fee\u9970\u7b26\u3002\u901a\u8fc7getName\u548cgetAge\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u5c5e\u6027\u7684\u503c\uff0c\u901a\u8fc7setName\u548csetAge\u65b9\u6cd5\u53ef\u4ee5\u8bbe\u7f6e\u5c5e\u6027\u7684\u503c\u3002setAge\u65b9\u6cd5\u4e2d\u52a0\u5165\u4e86\u5bf9age\u503c\u7684\u6709\u6548\u6027\u68c0\u67e5\uff0c\u786e\u4fddage\u5c5e\u6027\u503c\u59cb\u7ec8\u5927\u4e8e\u7b49\u4e8e0\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u5c01\u88c5\u65b9\u6cd5 \u5728Java\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee\u4fee\u9970\u7b26\u548c\u65b9\u6cd5\u6765\u5b9e\u73b0\u5c01\u88c5\u3002\u4f8b\u5982\uff0c\u5c06\u65b9\u6cd5\u8bbe\u7f6e\u4e3aprivate\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u5c31\u53ef\u4ee5\u5c06\u5176\u9690\u85cf\u5728\u7c7b\u7684\u5185\u90e8\uff0c\u53ea\u80fd\u5728\u7c7b\u7684\u5185\u90e8\u8bbf\u95ee\u548c\u8c03\u7528\u3002\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u5916\u90e8\u8bef\u7528\u6216\u4fee\u6539\u65b9\u6cd5\uff0c\u4ece\u800c\u4fdd\u8bc1\u4ee3\u7801\u7684\u5b89\u5168\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public class MathUtils {\n    private static int add(int a, int b) {\n        return a + b;\n    }\n\n    public static int addPositive(int a, int b) {\n        if (a &lt; 0) {\n            a = 0;\n        }\n        if (b &lt; 0) {\n            b = 0;\n        }\n        return add(a, b);\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2aMathUtils\u7c7b\uff0c\u5e76\u5c06add\u65b9\u6cd5\u8bbe\u7f6e\u4e3aprivate\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u53ea\u80fd\u5728\u7c7b\u7684\u5185\u90e8\u8bbf\u95ee\u548c\u8c03\u7528\u3002\u7136\u540e\uff0c\u901a\u8fc7add<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u7ee7\u627f<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u7ee7\u627f\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u7528\u4e8e\u521b\u5efa\u65b0\u7684\u7c7b\uff0c\u901a\u8fc7\u7ee7\u627f\u5df2\u6709\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4ee5\u4fbf\u5b9e\u73b0\u4ee3\u7801\u7684\u91cd\u7528\u548c\u6269\u5c55\u3002\u7ee7\u627f\u53ef\u4ee5\u5e2e\u52a9\u7a0b\u5e8f\u5458\u907f\u514d\u91cd\u590d\u7f16\u5199\u4ee3\u7801\uff0c\u5e76\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u4ee5\u4e0b\u662fJava\u7ee7\u627f\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7ee7\u627f\u57fa\u672c\u8bed\u6cd5 \u5728Java\u4e2d\uff0c\u4f7f\u7528extends\u5173\u952e\u5b57\u6765\u5b9e\u73b0\u7ee7\u627f\u3002\u7ee7\u627f\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">javascriptCopy code<code>class \u5b50\u7c7b\u540d extends \u7236\u7c7b\u540d {\n    \/\/ \u5b50\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\n}\n<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d\uff0c\u5b50\u7c7b\u662f\u65b0\u521b\u5efa\u7684\u7c7b\uff0c\u7236\u7c7b\u662f\u5df2\u6709\u7684\u7c7b\u3002\u5b50\u7c7b\u5c06\u7ee7\u627f\u7236\u7c7b\u7684\u6240\u6709\u975eprivate\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u901a\u8fc7\u7ee7\u627f\uff0c\u5b50\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u7236\u7c7b\u7684\u516c\u5171\u65b9\u6cd5\u548c\u5c5e\u6027\uff0c\u4ece\u800c\u5b9e\u73b0\u4ee3\u7801\u7684\u91cd\u7528\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u7ee7\u627f\u4e2d\u7684\u65b9\u6cd5\u91cd\u5199 \u5728Java\u4e2d\uff0c\u5b50\u7c7b\u53ef\u4ee5\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5\uff0c\u4ee5\u4fbf\u5b9e\u73b0\u81ea\u5df1\u7684\u884c\u4e3a\u3002\u8fd9\u79cd\u884c\u4e3a\u79f0\u4e3a\u65b9\u6cd5\u91cd\u5199\uff08\u6216\u65b9\u6cd5\u8986\u76d6\uff09\u3002\u5728\u5b50\u7c7b\u4e2d\uff0c\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u548c\u7236\u7c7b\u76f8\u540c\u540d\u79f0\u3001\u76f8\u540c\u53c2\u6570\u5217\u8868\u548c\u76f8\u540c\u8fd4\u56de\u7c7b\u578b\u7684\u65b9\u6cd5\uff0c\u7528\u4e8e\u8986\u76d6\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public class Animal {\n    public void move() {\n        System.out.println(\"\u52a8\u7269\u5728\u79fb\u52a8\");\n    }\n}\n\npublic class Dog extends Animal {\n    public void move() {\n        System.out.println(\"\u72d7\u5728\u8dd1\");\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2aAnimal\u7c7b\u548c\u4e00\u4e2aDog\u7c7b\uff0cDog\u7c7b\u7ee7\u627f\u81eaAnimal\u7c7b\u3002\u5728Dog\u7c7b\u4e2d\uff0c\u91cd\u5199\u4e86\u7236\u7c7b\u7684move\u65b9\u6cd5\uff0c\u7528\u4e8e\u5b9e\u73b0\u81ea\u5df1\u7684\u884c\u4e3a\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u7ee7\u627f\u4e2d\u7684super\u5173\u952e\u5b57 \u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528super\u5173\u952e\u5b57\u6765\u5f15\u7528\u7236\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u901a\u8fc7super\uff0c\u5b50\u7c7b\u53ef\u4ee5\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u3001\u8bbf\u95ee\u7236\u7c7b\u7684\u5c5e\u6027\u548c\u8c03\u7528\u7236\u7c7b\u7684\u65b9\u6cd5\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public class Animal {\n    private String name;\n    private int age;\n\n    public Animal(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    public void showInfo() {\n        System.out.println(\"\u59d3\u540d\uff1a\" + name + \"\uff0c\u5e74\u9f84\uff1a\" + age);\n    }\n}\n\npublic class Dog extends Animal {\n    public Dog(String name, int age) {\n        super(name, age);\n    }\n\n    public void bark() {\n        System.out.println(\"\u6c6a\u6c6a\u6c6a\uff01\");\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2aAnimal\u7c7b\u548c\u4e00\u4e2aDog\u7c7b\uff0cDog\u7c7b\u7ee7\u627f\u81eaAnimal\u7c7b\u3002\u5728Dog\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u4e2d\uff0c\u901a\u8fc7super\u5173\u952e\u5b57\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u7528\u4e8e\u521d\u59cb\u5316\u7236\u7c7b\u7684\u5c5e\u6027\u3002\u5728Dog\u7c7b\u4e2d\uff0c\u8c03\u7528\u7236\u7c7b\u7684showInfo\u65b9\u6cd5\uff0c\u7528\u4e8e\u663e\u793a\u7236\u7c7b\u7684\u5c5e\u6027\u503c\u3002<\/p>\n\n\n\n<p>\u7ee7\u627f\u662fJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u901a\u8fc7\u7ee7\u627f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4ee3\u7801\u7684\u91cd\u7528\u548c\u6269\u5c55\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u591a\u6001<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u591a\u6001\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u7528\u4e8e\u5b9e\u73b0\u4e0d\u540c\u5bf9\u8c61\u4e4b\u95f4\u7684\u4e92\u76f8\u66ff\u4ee3\u548c\u5171\u4eab\u3002\u591a\u6001\u53ef\u4ee5\u4f7f\u7a0b\u5e8f\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u6269\u5c55\uff0c\u540c\u65f6\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u4ee5\u4e0b\u662fJava\u591a\u6001\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u591a\u6001\u7684\u57fa\u672c\u6982\u5ff5 \u591a\u6001\u662f\u6307\u540c\u4e00\u4e2a\u65b9\u6cd5\u540d\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u5bf9\u8c61\u4e2d\u6709\u4e0d\u540c\u7684\u5b9e\u73b0\u3002\u5728Java\u4e2d\uff0c\u591a\u6001\u6709\u4e24\u79cd\u8868\u73b0\u5f62\u5f0f\uff1a\u65b9\u6cd5\u91cd\u8f7d\u548c\u65b9\u6cd5\u8986\u76d6\u3002\u65b9\u6cd5\u91cd\u8f7d\u662f\u6307\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u53ef\u4ee5\u5b9a\u4e49\u591a\u4e2a\u540d\u79f0\u76f8\u540c\u4f46\u53c2\u6570\u5217\u8868\u4e0d\u540c\u7684\u65b9\u6cd5\u3002\u65b9\u6cd5\u8986\u76d6\u662f\u6307\u5728\u5b50\u7c7b\u4e2d\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5\uff0c\u5b9e\u73b0\u81ea\u5df1\u7684\u884c\u4e3a\u3002<\/li>\n\n\n\n<li>\u591a\u6001\u7684\u5b9e\u73b0\u65b9\u6cd5 \u5728Java\u4e2d\uff0c\u591a\u6001\u6709\u4e24\u79cd\u5b9e\u73b0\u65b9\u6cd5\uff1a\u7ee7\u627f\u548c\u63a5\u53e3\u3002\u7ee7\u627f\u662f\u6307\u5b50\u7c7b\u53ef\u4ee5\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5\uff0c\u5b9e\u73b0\u81ea\u5df1\u7684\u884c\u4e3a\uff0c\u4ece\u800c\u5b9e\u73b0\u591a\u6001\u3002\u63a5\u53e3\u662f\u4e00\u7ec4\u62bd\u8c61\u65b9\u6cd5\u7684\u96c6\u5408\uff0c\u901a\u8fc7\u5b9e\u73b0\u63a5\u53e3\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4e0d\u540c\u5bf9\u8c61\u4e4b\u95f4\u7684\u4e92\u76f8\u66ff\u4ee3\u548c\u5171\u4eab\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u7ee7\u627f\u5b9e\u73b0\u591a\u6001\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public class Animal {\n    public void move() {\n        System.out.println(\"\u52a8\u7269\u5728\u79fb\u52a8\");\n    }\n}\n\npublic class Dog extends Animal {\n    public void move() {\n        System.out.println(\"\u72d7\u5728\u8dd1\");\n    }\n}\n\npublic class Cat extends Animal {\n    public void move() {\n        System.out.println(\"\u732b\u5728\u8d70\");\n    }\n}\n\npublic class Test {\n    public static void main(String[] args) {\n        Animal animal1 = new Animal();\n        Animal animal2 = new Dog();\n        Animal animal3 = new Cat();\n\n        animal1.move();\n        animal2.move();\n        animal3.move();\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2aAnimal\u7c7b\u3001\u4e00\u4e2aDog\u7c7b\u548c\u4e00\u4e2aCat\u7c7b\u3002Dog\u548cCat\u7c7b\u90fd\u7ee7\u627f\u81eaAnimal\u7c7b\uff0c\u5e76\u91cd\u5199\u4e86move\u65b9\u6cd5\u3002\u5728Test\u7c7b\u4e2d\uff0c\u5206\u522b\u521b\u5efa\u4e86\u4e00\u4e2aAnimal\u3001\u4e00\u4e2aDog\u548c\u4e00\u4e2aCat\u7684\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528\u5b83\u4eec\u7684move\u65b9\u6cd5\u3002\u7531\u4e8eanimal2\u548canimal3\u7684\u7c7b\u578b\u4e3aAnimal\uff0c\u4f46\u5b83\u4eec\u5206\u522b\u6307\u5411\u4e86Dog\u548cCat\u7684\u5bf9\u8c61\uff0c\u56e0\u6b64\u5728\u8c03\u7528move\u65b9\u6cd5\u65f6\u4f1a\u5206\u522b\u8c03\u7528Dog\u548cCat\u7c7b\u4e2d\u7684move\u65b9\u6cd5\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u591a\u6001\u7684\u4f18\u70b9 \u591a\u6001\u53ef\u4ee5\u4f7f\u7a0b\u5e8f\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u6269\u5c55\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u901a\u8fc7\u591a\u6001\uff0c\u7a0b\u5e8f\u5458\u53ef\u4ee5\u6839\u636e\u9700\u6c42\u66ff\u6362\u4e0d\u540c\u7684\u5bf9\u8c61\uff0c\u800c\u4e0d\u9700\u8981\u4fee\u6539\u73b0\u6709\u7684\u4ee3\u7801\u3002\u8fd9\u6837\u53ef\u4ee5\u7b80\u5316\u7a0b\u5e8f\u7684\u5f00\u53d1\u548c\u7ef4\u62a4\uff0c\u63d0\u9ad8\u4e86\u7a0b\u5e8f\u7684\u53ef\u6269\u5c55\u6027\u548c\u53ef\u91cd\u7528\u6027\u3002<\/li>\n<\/ol>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u62bd\u8c61\u7c7b<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u62bd\u8c61\u7c7b\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u7528\u4e8e\u8868\u793a\u4e00\u7c7b\u5177\u6709\u76f8\u4f3c\u7279\u5f81\u548c\u884c\u4e3a\u7684\u5bf9\u8c61\uff0c\u4f46\u662f\u4e0d\u80fd\u76f4\u63a5\u5b9e\u4f8b\u5316\u3002\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\u548c\u975e\u62bd\u8c61\u65b9\u6cd5\uff0c\u4f46\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316\u3002\u4ee5\u4e0b\u662fJava\u62bd\u8c61\u7c7b\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u62bd\u8c61\u7c7b\u7684\u57fa\u672c\u6982\u5ff5 \u62bd\u8c61\u7c7b\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u7c7b\uff0c\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316\u3002\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\u548c\u975e\u62bd\u8c61\u65b9\u6cd5\u3002\u62bd\u8c61\u65b9\u6cd5\u662f\u6307\u6ca1\u6709\u5b9e\u73b0\u4f53\u7684\u65b9\u6cd5\uff0c\u53ea\u6709\u65b9\u6cd5\u7684\u58f0\u660e\u3002\u62bd\u8c61\u65b9\u6cd5\u5fc5\u987b\u5728\u975e\u62bd\u8c61\u5b50\u7c7b\u4e2d\u5b9e\u73b0\u3002<\/li>\n\n\n\n<li>\u62bd\u8c61\u7c7b\u7684\u57fa\u672c\u8bed\u6cd5 \u5728Java\u4e2d\uff0c\u4f7f\u7528abstract\u5173\u952e\u5b57\u6765\u5b9a\u4e49\u62bd\u8c61\u7c7b\u548c\u62bd\u8c61\u65b9\u6cd5\u3002\u62bd\u8c61\u7c7b\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>abstract class \u7c7b\u540d {\n    \/\/ \u62bd\u8c61\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\n    abstract \u8fd4\u56de\u7c7b\u578b \u65b9\u6cd5\u540d();\n}\n<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d\uff0c\u7c7b\u540d\u662f\u62bd\u8c61\u7c7b\u7684\u540d\u79f0\uff0c\u62bd\u8c61\u65b9\u6cd5\u662f\u6307\u6ca1\u6709\u5b9e\u73b0\u4f53\u7684\u65b9\u6cd5\uff0c\u53ea\u6709\u65b9\u6cd5\u7684\u58f0\u660e\u3002\u62bd\u8c61\u65b9\u6cd5\u5fc5\u987b\u4ee5\u5206\u53f7\u7ed3\u5c3e\uff0c\u4e0d\u80fd\u5305\u542b\u65b9\u6cd5\u4f53\u3002\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5305\u542b\u975e\u62bd\u8c61\u65b9\u6cd5\uff0c\u4e5f\u53ef\u4ee5\u5305\u542b\u5c5e\u6027\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u62bd\u8c61\u7c7b\u7684\u4f5c\u7528 \u62bd\u8c61\u7c7b\u53ef\u4ee5\u88ab\u7528\u4e8e\u8868\u793a\u4e00\u7c7b\u5177\u6709\u76f8\u4f3c\u7279\u5f81\u548c\u884c\u4e3a\u7684\u5bf9\u8c61\uff0c\u4f46\u662f\u4e0d\u80fd\u76f4\u63a5\u5b9e\u4f8b\u5316\u3002\u62bd\u8c61\u7c7b\u53ef\u4ee5\u88ab\u7528\u4e8e\u5b9a\u4e49\u4e00\u4e2a\u901a\u7528\u7684\u6a21\u677f\uff0c\u5b50\u7c7b\u53ef\u4ee5\u901a\u8fc7\u7ee7\u627f\u62bd\u8c61\u7c7b\uff0c\u5e76\u5b9e\u73b0\u62bd\u8c61\u65b9\u6cd5\u6765\u5b9e\u73b0\u81ea\u5df1\u7684\u884c\u4e3a\u3002\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5728OOP\u4e2d\u8d77\u5230\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u540c\u65f6\u8fd8\u53ef\u4ee5\u5e2e\u52a9\u7a0b\u5e8f\u5458\u5b9e\u73b0\u4ee3\u7801\u7684\u91cd\u7528\u548c\u6269\u5c55\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u62bd\u8c61\u7c7b\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>abstract class Shape {\n    protected int x, y;\n    public void move(int x, int y) {\n        this.x = x;\n        this.y = y;\n    }\n    public abstract void draw();\n}\n\nclass Circle extends Shape {\n    private int radius;\n    public Circle(int x, int y, int radius) {\n        this.x = x;\n        this.y = y;\n        this.radius = radius;\n    }\n    public void draw() {\n        System.out.println(\"\u753b\u4e00\u4e2a\u5706\uff0c\u534a\u5f84\u4e3a\uff1a\" + radius);\n    }\n}\n\npublic class Test {\n    public static void main(String[] args) {\n        Shape shape = new Circle(10, 10, 5);\n        shape.move(20, 20);\n        shape.draw();\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u62bd\u8c61\u7c7bShape\uff0c\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5draw\u548c\u4e00\u4e2a\u975e\u62bd\u8c61\u65b9\u6cd5move\u3002Circle\u7c7b\u7ee7\u627f\u81eaShape\u7c7b\uff0c\u5e76\u91cd\u5199\u4e86draw\u65b9\u6cd5\u3002\u5728Test\u7c7b\u4e2d\uff0c\u521b\u5efa\u4e86\u4e00\u4e2aCircle\u5bf9\u8c61\uff0c\u8d4b\u503c\u7ed9\u4e00\u4e2aShape\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u901a\u8fc7move\u548cdraw\u65b9\u6cd5\u5bf9\u5176\u8fdb\u884c\u64cd\u4f5c\u3002\u7531\u4e8eShape\u7c7b\u662f\u62bd\u8c61\u7c7b\uff0c\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316\uff0c\u56e0\u6b64\u53ea\u80fd\u4f7f\u7528\u5b83\u7684\u5b50\u7c7b\u8fdb\u884c\u5b9e\u4f8b\u5316\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u4f7f\u7528\u62bd\u8c61\u7c7b\u6765\u5b9e\u73b0<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u63a5\u53e3<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u63a5\u53e3\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u7528\u4e8e\u5b9a\u4e49\u4e00\u7ec4\u62bd\u8c61\u65b9\u6cd5\u7684\u96c6\u5408\uff0c\u4efb\u4f55\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u7c7b\u90fd\u5fc5\u987b\u5b9e\u73b0\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u6240\u6709\u65b9\u6cd5\u3002\u63a5\u53e3\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u591a\u6001\u548c\u4ee3\u7801\u590d\u7528\u3002\u4ee5\u4e0b\u662fJava\u63a5\u53e3\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u63a5\u53e3\u7684\u57fa\u672c\u6982\u5ff5 \u63a5\u53e3\u662f\u4e00\u79cd\u62bd\u8c61\u7c7b\u578b\uff0c\u53ea\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\u7684\u5b9a\u4e49\u3002\u63a5\u53e3\u6ca1\u6709\u5b9e\u73b0\u4f53\uff0c\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316\u3002\u5728Java\u4e2d\uff0c\u4f7f\u7528interface\u5173\u952e\u5b57\u6765\u5b9a\u4e49\u63a5\u53e3\uff0c\u63a5\u53e3\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>interface \u63a5\u53e3\u540d {\n    \/\/ \u63a5\u53e3\u7684\u62bd\u8c61\u65b9\u6cd5\n}\n<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d\uff0c\u63a5\u53e3\u540d\u662f\u63a5\u53e3\u7684\u540d\u79f0\uff0c\u63a5\u53e3\u4e2d\u5305\u542b\u4e00\u7ec4\u62bd\u8c61\u65b9\u6cd5\u7684\u5b9a\u4e49\uff0c\u65b9\u6cd5\u540d\u548c\u53c2\u6570\u5217\u8868\u9700\u8981\u5728\u5177\u4f53\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u4e2d\u5b9e\u73b0\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u63a5\u53e3\u7684\u5b9e\u73b0\u65b9\u6cd5 \u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528implements\u5173\u952e\u5b57\u6765\u5b9e\u73b0\u63a5\u53e3\u3002\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u5fc5\u987b\u5b9e\u73b0\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u6240\u6709\u62bd\u8c61\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u5b9e\u73b0\u63a5\u53e3\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>interface Shape {\n    public void draw();\n}\n\nclass Circle implements Shape {\n    public void draw() {\n        System.out.println(\"\u753b\u4e00\u4e2a\u5706\");\n    }\n}\n\npublic class Test {\n    public static void main(String[] args) {\n        Shape shape = new Circle();\n        shape.draw();\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u63a5\u53e3Shape\uff0c\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5draw\u3002Circle\u7c7b\u5b9e\u73b0\u4e86Shape\u63a5\u53e3\uff0c\u5e76\u5b9e\u73b0\u4e86draw\u65b9\u6cd5\u3002\u5728Test\u7c7b\u4e2d\uff0c\u521b\u5efa\u4e86\u4e00\u4e2aCircle\u5bf9\u8c61\uff0c\u8d4b\u503c\u7ed9\u4e00\u4e2aShape\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u901a\u8fc7draw\u65b9\u6cd5\u5bf9\u5176\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u63a5\u53e3\u7684\u4f18\u70b9 \u63a5\u53e3\u53ef\u4ee5\u5e2e\u52a9\u7a0b\u5e8f\u5458\u5b9e\u73b0\u4ee3\u7801\u7684\u91cd\u7528\u548c\u6269\u5c55\u3002\u901a\u8fc7\u63a5\u53e3\uff0c\u7a0b\u5e8f\u5458\u53ef\u4ee5\u5b9a\u4e49\u4e00\u7ec4\u6807\u51c6\u7684\u65b9\u6cd5\uff0c\u4efb\u4f55\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u7c7b\u90fd\u5fc5\u987b\u5b9e\u73b0\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u6240\u6709\u65b9\u6cd5\u3002\u8fd9\u6837\u53ef\u4ee5\u5b9e\u73b0\u4e0d\u540c\u5bf9\u8c61\u4e4b\u95f4\u7684\u4e92\u76f8\u66ff\u4ee3\u548c\u5171\u4eab\u3002\u63a5\u53e3\u8fd8\u53ef\u4ee5\u5b9e\u73b0\u591a\u6001\uff0c\u63d0\u9ad8\u4e86\u7a0b\u5e8f\u7684\u7075\u6d3b\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u63a5\u53e3\u662fJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u901a\u8fc7\u63a5\u53e3\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4ee3\u7801\u7684\u91cd\u7528\u548c\u6269\u5c55\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u540c\u65f6\u8fd8\u53ef\u4ee5\u5e2e\u52a9\u7a0b\u5e8f\u5458\u5b9e\u73b0\u591a\u6001\u548c\u4ee3\u7801\u590d\u7528\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u5185\u90e8\u7c7b<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u5185\u90e8\u7c7b\u662f\u4e00\u79cd\u5b9a\u4e49\u5728\u53e6\u4e00\u4e2a\u7c7b\u4e2d\u7684\u7c7b\u3002\u5185\u90e8\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u5305\u542b\u5b83\u7684\u5916\u90e8\u7c7b\u7684\u6240\u6709\u6210\u5458\uff0c\u5305\u62ec\u79c1\u6709\u6210\u5458\u3002\u5185\u90e8\u7c7b\u6709\u56db\u79cd\u7c7b\u578b\uff1a\u6210\u5458\u5185\u90e8\u7c7b\u3001\u5c40\u90e8\u5185\u90e8\u7c7b\u3001\u533f\u540d\u5185\u90e8\u7c7b\u548c\u9759\u6001\u5185\u90e8\u7c7b\u3002\u4ee5\u4e0b\u662fJava\u5185\u90e8\u7c7b\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6210\u5458\u5185\u90e8\u7c7b \u6210\u5458\u5185\u90e8\u7c7b\u662f\u5b9a\u4e49\u5728\u53e6\u4e00\u4e2a\u7c7b\u4e2d\u7684\u7c7b\uff0c\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u7c7b\u7684\u6240\u6709\u6210\u5458\uff0c\u5305\u62ec\u79c1\u6709\u6210\u5458\u3002\u6210\u5458\u5185\u90e8\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u88ab\u5916\u90e8\u7c7b\u5b9e\u4f8b\u5316\uff0c\u4e5f\u53ef\u4ee5\u88ab\u5916\u90e8\u7c7b\u7684\u9759\u6001\u65b9\u6cd5\u548c\u9759\u6001\u53d8\u91cf\u8c03\u7528\u3002\u4ee5\u4e0b\u662f\u6210\u5458\u5185\u90e8\u7c7b\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public class OuterClass {\n    private int x = 10;\n    class InnerClass {\n        public void printX() {\n            System.out.println(x);\n        }\n    }\n}\n\npublic class Test {\n    public static void main(String[] args) {\n        OuterClass outer = new OuterClass();\n        OuterClass.InnerClass inner = outer.new InnerClass();\n        inner.printX();\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2aOuterClass\u7c7b\u548c\u4e00\u4e2aInnerClass\u5185\u90e8\u7c7b\u3002InnerClass\u7c7b\u53ef\u4ee5\u8bbf\u95eeOuterClass\u7c7b\u7684\u79c1\u6709\u6210\u5458\u53d8\u91cfx\uff0c\u901a\u8fc7new\u5173\u952e\u5b57\u521b\u5efa\u4e86InnerClass\u7684\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528\u4e86printX\u65b9\u6cd5\uff0c\u8f93\u51fa\u4e86OuterClass\u7c7b\u4e2d\u7684x\u53d8\u91cf\u7684\u503c\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u5c40\u90e8\u5185\u90e8\u7c7b \u5c40\u90e8\u5185\u90e8\u7c7b\u662f\u5b9a\u4e49\u5728\u65b9\u6cd5\u5185\u90e8\u7684\u7c7b\uff0c\u53ea\u80fd\u5728\u65b9\u6cd5\u5185\u90e8\u4f7f\u7528\u3002\u5c40\u90e8\u5185\u90e8\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u65b9\u6cd5\u5185\u7684\u53d8\u91cf\uff0c\u4f46\u662f\u5fc5\u987b\u662ffinal\u53d8\u91cf\u3002\u4ee5\u4e0b\u662f\u5c40\u90e8\u5185\u90e8\u7c7b\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public class OuterClass {\n    public void print() {\n        final int x = 10;\n        class InnerClass {\n            public void printX() {\n                System.out.println(x);\n            }\n        }\n        InnerClass inner = new InnerClass();\n        inner.printX();\n    }\n}\n\npublic class Test {\n    public static void main(String[] args) {\n        OuterClass outer = new OuterClass();\n        outer.print();\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2aOuterClass\u7c7b\u548c\u4e00\u4e2a\u5c40\u90e8\u5185\u90e8\u7c7bInnerClass\u3002InnerClass\u7c7b\u8bbf\u95ee\u4e86\u5916\u90e8\u65b9\u6cd5print\u4e2d\u7684final\u53d8\u91cfx\uff0c\u901a\u8fc7new\u5173\u952e\u5b57\u521b\u5efa\u4e86InnerClass\u7684\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528\u4e86printX\u65b9\u6cd5\uff0c\u8f93\u51fa\u4e86x\u53d8\u91cf\u7684\u503c\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u533f\u540d\u5185\u90e8\u7c7b \u533f\u540d\u5185\u90e8\u7c7b\u662f\u6ca1\u6709\u540d\u5b57\u7684\u5185\u90e8\u7c7b\uff0c\u901a\u5e38\u7528\u4e8e\u521b\u5efa\u53ea\u9700\u8981\u4f7f\u7528\u4e00\u6b21\u7684\u7c7b\u3002\u533f\u540d\u5185\u90e8\u7c7b\u53ef\u4ee5\u76f4\u63a5\u5b9e\u73b0\u63a5\u53e3\u6216\u7ee7\u627f\u7236\u7c7b\uff0c\u4e0d\u9700\u8981\u663e\u5f0f\u5730\u5b9a\u4e49\u4e00\u4e2a\u65b0\u7684\u7c7b\u3002\u4ee5\u4e0b\u662f\u533f\u540d\u5185\u90e8\u7c7b\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>interface Shape {\n    public void draw();\n}\n\npublic class Test {\n    public static void main(String[] args) {\n        Shape shape = new Shape() {\n            public void draw() {\n                System.out.println(\"\u753b\u4e00\u4e2a\u5706\");\n            }\n        };\n        shape.draw();\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u63a5\u53e3Shape\u548c\u4e00\u4e2a\u533f\u540d\u5185\u90e8\u7c7b\uff0c\u76f4\u63a5\u5b9e\u73b0\u4e86Shape\u63a5\u53e3\uff0c\u5e76\u91cd\u5199\u4e86draw\u65b9\u6cd5\u3002\u5728Test\u7c7b\u4e2d\uff0c\u901a\u8fc7\u521b\u5efa\u4e00\u4e2aShape\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u5e76<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u5e38\u7528\u7c7b\u5e93\u7684\u5b57\u7b26\u4e32<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u4e00\u79cd\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u5b58\u50a8\u548c\u64cd\u4f5c\u6587\u672c\u6570\u636e\u3002Java\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5b57\u7b26\u4e32\u7c7b\u5e93\uff08String\u7c7b\u548cStringBuilder\u7c7b\uff09\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662fJava\u5e38\u7528\u7c7b\u5e93\u7684\u5b57\u7b26\u4e32\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>String\u7c7b String\u7c7b\u662fJava\u4e2d\u7528\u4e8e\u8868\u793a\u5b57\u7b26\u4e32\u7684\u7c7b\uff0c\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\u3002String\u7c7b\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u4e00\u65e6\u521b\u5efa\u4e86\u4e00\u4e2aString\u5bf9\u8c61\uff0c\u5c31\u4e0d\u80fd\u6539\u53d8\u5b83\u7684\u503c\u3002\u4ee5\u4e0b\u662fString\u7c7b\u7684\u4e00\u4e9b\u5e38\u7528\u65b9\u6cd5\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>length(): \u8fd4\u56de\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u3002<\/li>\n\n\n\n<li>charAt(int index): \u8fd4\u56de\u6307\u5b9a\u4f4d\u7f6e\u7684\u5b57\u7b26\u3002<\/li>\n\n\n\n<li>equals(String str): \u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u76f8\u7b49\u3002<\/li>\n\n\n\n<li>toLowerCase(): \u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5c0f\u5199\u5b57\u6bcd\u3002<\/li>\n\n\n\n<li>toUpperCase(): \u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5927\u5199\u5b57\u6bcd\u3002<\/li>\n\n\n\n<li>trim(): \u53bb\u6389\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u683c\u3002<\/li>\n\n\n\n<li>substring(int beginIndex, int endIndex): \u8fd4\u56de\u4ecebeginIndex\u5f00\u59cb\u5230endIndex-1\u4f4d\u7f6e\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528String\u7c7b\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public class Test {\n    public static void main(String[] args) {\n        String str1 = \"Hello World\";\n        System.out.println(str1.length()); \/\/ \u8f93\u51fa\uff1a11\n        System.out.println(str1.charAt(1)); \/\/ \u8f93\u51fa\uff1ae\n        System.out.println(str1.equals(\"hello world\")); \/\/ \u8f93\u51fa\uff1afalse\n        System.out.println(str1.toLowerCase()); \/\/ \u8f93\u51fa\uff1ahello world\n        System.out.println(str1.toUpperCase()); \/\/ \u8f93\u51fa\uff1aHELLO WORLD\n        System.out.println(str1.trim()); \/\/ \u8f93\u51fa\uff1aHello World\n        System.out.println(str1.substring(1, 5)); \/\/ \u8f93\u51fa\uff1aello\n    }\n}\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>StringBuilder\u7c7b StringBuilder\u7c7b\u662fJava\u4e2d\u7528\u4e8e\u8868\u793a\u53ef\u53d8\u5b57\u7b26\u4e32\u7684\u7c7b\uff0c\u53ef\u4ee5\u52a8\u6001\u4fee\u6539\u5b57\u7b26\u4e32\u7684\u503c\u3002StringBuilder\u7c7b\u7684\u65b9\u6cd5\u548cString\u7c7b\u7c7b\u4f3c\uff0c\u4f46\u662fStringBuilder\u7c7b\u7684\u65b9\u6cd5\u662f\u53ef\u53d8\u7684\u3002\u4ee5\u4e0b\u662fStringBuilder\u7c7b\u7684\u4e00\u4e9b\u5e38\u7528\u65b9\u6cd5\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>append(String str): \u5728\u5b57\u7b26\u4e32\u672b\u5c3e\u6dfb\u52a0\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n<li>insert(int offset, String str): \u5728\u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n<li>delete(int start, int end): \u5220\u9664\u6307\u5b9a\u4f4d\u7f6e\u7684\u5b57\u7b26\u3002<\/li>\n\n\n\n<li>reverse(): \u53cd\u8f6c\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528StringBuilder\u7c7b\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public class Test {\n    public static void main(String[] args) {\n        StringBuilder str2 = new StringBuilder(\"Hello World\");\n        str2.append(\", Java\");\n        System.out.println(str2); \/\/ \u8f93\u51fa\uff1aHello World, Java\n        str2.insert(5, \"Nice \");\n        System.out.println(str2); \/\/ \u8f93\u51fa\uff1aHello Nice World, Java\n        str2.delete(5, 10);\n        System.out.println(str2); \/\/ \u8f93\u51fa\uff1aHello World, Java\n        str2.reverse();\n        System.out.println(str2); \/\/ \u8f93\u51fa\uff1aavaJ ,dlroW olleH\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>Java\u7684\u5b57\u7b26\u4e32\u7c7b\u5e93\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7a0b\u5e8f\u5458\u5b9e\u73b0\u5404\u79cd\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u3002\u5728\u5b9e\u9645\u7f16\u7a0b\u4e2d\uff0c\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u548c\u573a\u666f\uff0c\u9009\u62e9\u5408\u9002\u7684\u5b57\u7b26\u4e32\u7c7b\u5e93\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u5e38\u7528\u7c7b\u5e93\u7684\u65e5\u671f\u548c\u65f6\u95f4<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u65e5\u671f\u548c\u65f6\u95f4\u662f\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\u4e4b\u4e00\uff0c\u7528\u4e8e\u5904\u7406\u65f6\u95f4\u76f8\u5173\u7684\u64cd\u4f5c\u3002Java\u63d0\u4f9b\u4e86\u4e00\u4e2a\u65e5\u671f\u548c\u65f6\u95f4\u7c7b\u5e93\uff08java.time\u5305\uff09\u6765\u5b9e\u73b0\u65e5\u671f\u548c\u65f6\u95f4\u7684\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662fJava\u5e38\u7528\u7c7b\u5e93\u7684\u65e5\u671f\u548c\u65f6\u95f4\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>LocalDate\u7c7b LocalDate\u7c7b\u7528\u4e8e\u8868\u793a\u4e00\u4e2a\u65e5\u671f\uff0c\u4e0d\u5305\u542b\u65f6\u95f4\u548c\u65f6\u533a\u4fe1\u606f\u3002LocalDate\u7c7b\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u65e5\u671f\u64cd\u4f5c\u65b9\u6cd5\uff0c\u4f8b\u5982\u83b7\u53d6\u5e74\u3001\u6708\u3001\u65e5\u7b49\u4fe1\u606f\uff0c\u8ba1\u7b97\u4e24\u4e2a\u65e5\u671f\u4e4b\u95f4\u7684\u5929\u6570\u7b49\u3002\u4ee5\u4e0b\u662fLocalDate\u7c7b\u7684\u4e00\u4e9b\u5e38\u7528\u65b9\u6cd5\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>now(): \u8fd4\u56de\u5f53\u524d\u65e5\u671f\u3002<\/li>\n\n\n\n<li>getYear(): \u8fd4\u56de\u5e74\u4efd\u3002<\/li>\n\n\n\n<li>getMonth(): \u8fd4\u56de\u6708\u4efd\u3002<\/li>\n\n\n\n<li>getDayOfMonth(): \u8fd4\u56de\u6708\u4e2d\u7684\u5929\u6570\u3002<\/li>\n\n\n\n<li>plusDays(long daysToAdd): \u5728\u5f53\u524d\u65e5\u671f\u4e0a\u52a0\u4e0a\u6307\u5b9a\u5929\u6570\u3002<\/li>\n\n\n\n<li>minusDays(long daysToSubtract): \u5728\u5f53\u524d\u65e5\u671f\u4e0a\u51cf\u53bb\u6307\u5b9a\u5929\u6570\u3002<\/li>\n\n\n\n<li>isAfter(LocalDate other): \u5224\u65ad\u5f53\u524d\u65e5\u671f\u662f\u5426\u5728\u53e6\u4e00\u4e2a\u65e5\u671f\u4e4b\u540e\u3002<\/li>\n\n\n\n<li>isBefore(LocalDate other): \u5224\u65ad\u5f53\u524d\u65e5\u671f\u662f\u5426\u5728\u53e6\u4e00\u4e2a\u65e5\u671f\u4e4b\u524d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528LocalDate\u7c7b\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>import java.time.LocalDate;\nimport java.time.Month;\n\npublic class Test {\n    public static void main(String[] args) {\n        LocalDate date1 = LocalDate.now();\n        System.out.println(date1); \/\/ \u8f93\u51fa\u5f53\u524d\u65e5\u671f\uff0c\u4f8b\u5982\uff1a2023-04-11\n        LocalDate date2 = LocalDate.of(2022, Month.DECEMBER, 31);\n        System.out.println(date2); \/\/ \u8f93\u51fa\u6307\u5b9a\u65e5\u671f\uff0c\u4f8b\u5982\uff1a2022-12-31\n        System.out.println(date1.getYear()); \/\/ \u8f93\u51fa\u5e74\u4efd\uff0c\u4f8b\u5982\uff1a2023\n        System.out.println(date1.getMonth()); \/\/ \u8f93\u51fa\u6708\u4efd\uff0c\u4f8b\u5982\uff1aAPRIL\n        System.out.println(date1.getDayOfMonth()); \/\/ \u8f93\u51fa\u6708\u4e2d\u7684\u5929\u6570\uff0c\u4f8b\u5982\uff1a11\n        LocalDate date3 = date1.plusDays(7);\n        System.out.println(date3); \/\/ \u8f93\u51fa\u5f53\u524d\u65e5\u671f\u52a0\u4e0a7\u5929\u540e\u7684\u65e5\u671f\uff0c\u4f8b\u5982\uff1a2023-04-18\n        System.out.println(date3.isAfter(date2)); \/\/ \u8f93\u51fatrue\uff0c\u56e0\u4e3adate3\u5728date2\u4e4b\u540e\n        System.out.println(date2.isBefore(date1)); \/\/ \u8f93\u51fatrue\uff0c\u56e0\u4e3adate2\u5728date1\u4e4b\u524d\n    }\n}\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>LocalTime\u7c7b LocalTime\u7c7b\u7528\u4e8e\u8868\u793a\u4e00\u4e2a\u65f6\u95f4\uff0c\u4e0d\u5305\u542b\u65e5\u671f\u548c\u65f6\u533a\u4fe1\u606f\u3002LocalTime\u7c7b\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u65f6\u95f4\u64cd\u4f5c\u65b9\u6cd5\uff0c\u4f8b\u5982\u83b7\u53d6\u5c0f\u65f6\u3001\u5206\u949f\u3001\u79d2\u7b49\u4fe1\u606f\uff0c\u8ba1\u7b97\u4e24\u4e2a\u65f6\u95f4\u4e4b\u95f4\u7684\u5dee\u503c\u7b49\u3002\u4ee5\u4e0b\u662fLocalTime\u7c7b\u7684\u4e00\u4e9b\u5e38\u7528\u65b9\u6cd5\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>now(): \u8fd4\u56de\u5f53\u524d\u65f6\u95f4\u3002<\/li>\n\n\n\n<li>getHour(): \u8fd4\u56de\u5c0f\u65f6\u6570\u3002<\/li>\n\n\n\n<li>getMinute(): \u8fd4\u56de\u5206\u949f\u6570\u3002<\/li>\n\n\n\n<li>getSecond(): \u8fd4\u56de\u79d2\u6570\u3002<\/li>\n\n\n\n<li>plusHours(long hoursToAdd): \u5728\u5f53\u524d\u65f6\u95f4\u4e0a\u52a0\u4e0a\u6307\u5b9a\u5c0f\u65f6\u6570\u3002<\/li>\n\n\n\n<li>minusMinutes(long minutesToSubtract): \u5728\u5f53\u524d\u65f6\u95f4\u4e0a\u51cf\u53bb\u6307\u5b9a\u5206\u949f\u6570\u3002<\/li>\n\n\n\n<li>isAfter(LocalTime other): \u5224\u65ad\u5f53\u524d\u65f6\u95f4\u662f\u5426\u5728\u53e6\u4e00\u4e2a\u65f6\u95f4\u4e4b\u540e\u3002<\/li>\n\n\n\n<li>isBefore(LocalTime other): \u5224\u65ad\u5f53\u524d\u65f6\u95f4\u662f\u5426\u5728\u53e6\u4e00\u4e2a\u65f6\u95f4\u4e4b\u524d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528LocalTime\u7c7b\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>import java.time.LocalTime;\n\npublic class Test {\n    public static void main(String[] args) {\n        LocalTime time1 = LocalTime.now();\n        System.out.println(time1); \/\/ \u8f93\u51fa\u5f53\u524d\u65f6\u95f4\uff0c\u4f8b\u5982\uff1a11:21:31.234\n        System.out.println(time1.get\n<\/code><\/pre>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u5e38\u7528\u7c7b\u5e93\u7684\u96c6\u5408\u7c7b<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u96c6\u5408\u7c7b\u662f\u4e00\u7ec4\u7c7b\uff0c\u7528\u4e8e\u5b58\u50a8\u4e00\u7ec4\u76f8\u5173\u7684\u5bf9\u8c61\u3002Java\u96c6\u5408\u7c7b\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u6570\u636e\u7ed3\u6784\u548c\u7b97\u6cd5\uff0c\u53ef\u4ee5\u9ad8\u6548\u5730\u64cd\u4f5c\u6570\u636e\u3002\u4ee5\u4e0b\u662fJava\u5e38\u7528\u7c7b\u5e93\u7684\u96c6\u5408\u7c7b\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>ArrayList\u7c7b ArrayList\u7c7b\u662fJava\u4e2d\u7528\u4e8e\u8868\u793a\u53ef\u53d8\u6570\u7ec4\u7684\u7c7b\uff0c\u53ef\u4ee5\u52a8\u6001\u5730\u6dfb\u52a0\u3001\u5220\u9664\u548c\u4fee\u6539\u6570\u7ec4\u5143\u7d20\u3002ArrayList\u7c7b\u662f\u57fa\u4e8e\u6570\u7ec4\u5b9e\u73b0\u7684\uff0c\u5177\u6709\u52a8\u6001\u589e\u957f\u7684\u80fd\u529b\u3002\u4ee5\u4e0b\u662fArrayList\u7c7b\u7684\u4e00\u4e9b\u5e38\u7528\u65b9\u6cd5\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>add(E e): \u5728\u6570\u7ec4\u672b\u5c3e\u6dfb\u52a0\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n\n\n\n<li>get(int index): \u8fd4\u56de\u6307\u5b9a\u4f4d\u7f6e\u7684\u5143\u7d20\u3002<\/li>\n\n\n\n<li>set(int index, E element): \u4fee\u6539\u6307\u5b9a\u4f4d\u7f6e\u7684\u5143\u7d20\u3002<\/li>\n\n\n\n<li>remove(int index): \u5220\u9664\u6307\u5b9a\u4f4d\u7f6e\u7684\u5143\u7d20\u3002<\/li>\n\n\n\n<li>size(): \u8fd4\u56de\u6570\u7ec4\u7684\u5927\u5c0f\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528ArrayList\u7c7b\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>import java.util.ArrayList;\n\npublic class Test {\n    public static void main(String[] args) {\n        ArrayList&lt;String&gt; list1 = new ArrayList&lt;String&gt;();\n        list1.add(\"Java\");\n        list1.add(\"Python\");\n        list1.add(\"C++\");\n        System.out.println(list1); \/\/ \u8f93\u51fa\uff1a[Java, Python, C++]\n        System.out.println(list1.get(1)); \/\/ \u8f93\u51fa\uff1aPython\n        list1.set(1, \"JavaScript\");\n        System.out.println(list1); \/\/ \u8f93\u51fa\uff1a[Java, JavaScript, C++]\n        list1.remove(2);\n        System.out.println(list1); \/\/ \u8f93\u51fa\uff1a[Java, JavaScript]\n        System.out.println(list1.size()); \/\/ \u8f93\u51fa\uff1a2\n    }\n}\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>HashMap\u7c7b HashMap\u7c7b\u662fJava\u4e2d\u7528\u4e8e\u8868\u793a\u952e\u503c\u5bf9\u6620\u5c04\u5173\u7cfb\u7684\u7c7b\uff0c\u53ef\u4ee5\u52a8\u6001\u5730\u6dfb\u52a0\u3001\u5220\u9664\u548c\u4fee\u6539\u952e\u503c\u5bf9\u3002HashMap\u7c7b\u57fa\u4e8e\u54c8\u5e0c\u8868\u5b9e\u73b0\uff0c\u5177\u6709\u5feb\u901f\u67e5\u627e\u7684\u80fd\u529b\u3002\u4ee5\u4e0b\u662fHashMap\u7c7b\u7684\u4e00\u4e9b\u5e38\u7528\u65b9\u6cd5\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>put(K key, V value): \u6dfb\u52a0\u4e00\u4e2a\u952e\u503c\u5bf9\u3002<\/li>\n\n\n\n<li>get(Object key): \u8fd4\u56de\u6307\u5b9a\u952e\u7684\u503c\u3002<\/li>\n\n\n\n<li>remove(Object key): \u5220\u9664\u6307\u5b9a\u952e\u7684\u503c\u3002<\/li>\n\n\n\n<li>containsKey(Object key): \u5224\u65ad\u662f\u5426\u5305\u542b\u6307\u5b9a\u952e\u3002<\/li>\n\n\n\n<li>size(): \u8fd4\u56de\u952e\u503c\u5bf9\u7684\u6570\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528HashMap\u7c7b\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>import java.util.HashMap;\n\npublic class Test {\n    public static void main(String[] args) {\n        HashMap&lt;String, Integer&gt; map1 = new HashMap&lt;String, Integer&gt;();\n        map1.put(\"Java\", 100);\n        map1.put(\"Python\", 90);\n        map1.put(\"C++\", 80);\n        System.out.println(map1); \/\/ \u8f93\u51fa\uff1a{Java=100, Python=90, C++=80}\n        System.out.println(map1.get(\"Java\")); \/\/ \u8f93\u51fa\uff1a100\n        map1.remove(\"C++\");\n        System.out.println(map1); \/\/ \u8f93\u51fa\uff1a{Java=100, Python=90}\n        System.out.println(map1.containsKey(\"Python\")); \/\/ \u8f93\u51fa\uff1atrue\n        System.out.println(map1.size()); \/\/ \u8f93\u51fa\uff1a2\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>Java\u7684\u96c6\u5408\u7c7b\u5e93\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u6570\u636e\u7ed3\u6784\u548c\u7b97\u6cd5\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7a0b\u5e8f\u5458\u9ad8\u6548\u5730\u64cd\u4f5c\u6570\u636e\u3002\u5728\u5b9e\u9645\u7f16\u7a0b\u4e2d\uff0c\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u548c\u573a\u666f\uff0c\u9009\u62e9\u5408\u9002\u7684\u96c6\u5408\u7c7b\u6765\u5b58\u50a8\u548c\u64cd\u4f5c\u6570\u636e\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u5e38\u7528\u7c7b\u5e93\u7684\u6587\u4ef6IO\u64cd\u4f5c<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u6587\u4ef6IO\u64cd\u4f5c\u662f\u5e38\u89c1\u7684\u64cd\u4f5c\u4e4b\u4e00\uff0c\u7528\u4e8e\u8bfb\u53d6\u548c\u5199\u5165\u6587\u4ef6\u3002Java\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6587\u4ef6IO\u7c7b\u5e93\uff08java.io\u5305\u548cjava.nio\u5305\uff09\u6765\u5b9e\u73b0\u6587\u4ef6IO\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662fJava\u5e38\u7528\u7c7b\u5e93\u7684\u6587\u4ef6IO\u64cd\u4f5c\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6587\u4ef6\u8bfb\u53d6\u64cd\u4f5c Java\u4e2d\u8bfb\u53d6\u6587\u4ef6\u7684\u65b9\u5f0f\u6709\u591a\u79cd\uff0c\u4f8b\u5982\u4f7f\u7528FileInputStream\u3001BufferedReader\u3001Scanner\u7b49\u7c7b\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528FileInputStream\u7c7b\u8bfb\u53d6\u6587\u4ef6\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>import java.io.FileInputStream;\nimport java.io.IOException;\n\npublic class Test {\n    public static void main(String[] args) {\n        try {\n            FileInputStream fis = new FileInputStream(\"test.txt\");\n            int data;\n            while ((data = fis.read()) != -1) {\n                System.out.print((char) data);\n            }\n            fis.close();\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u6587\u4ef6\u5199\u5165\u64cd\u4f5c Java\u4e2d\u5199\u5165\u6587\u4ef6\u7684\u65b9\u5f0f\u4e5f\u6709\u591a\u79cd\uff0c\u4f8b\u5982\u4f7f\u7528FileOutputStream\u3001BufferedWriter\u7b49\u7c7b\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528FileOutputStream\u7c7b\u5199\u5165\u6587\u4ef6\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>import java.io.FileOutputStream;\nimport java.io.IOException;\n\npublic class Test {\n    public static void main(String[] args) {\n        try {\n            FileOutputStream fos = new FileOutputStream(\"test.txt\");\n            String str = \"Hello, Java!\";\n            byte[] bytes = str.getBytes();\n            fos.write(bytes);\n            fos.close();\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u6587\u4ef6\u590d\u5236\u64cd\u4f5c Java\u4e2d\u5b9e\u73b0\u6587\u4ef6\u590d\u5236\u53ef\u4ee5\u4f7f\u7528FileInputStream\u548cFileOutputStream\u7c7b\uff0c\u5c06\u6e90\u6587\u4ef6\u7684\u6570\u636e\u8bfb\u53d6\u5230\u7f13\u51b2\u533a\uff0c\u518d\u5199\u5165\u76ee\u6807\u6587\u4ef6\u4e2d\u3002\u4ee5\u4e0b\u662f\u6587\u4ef6\u590d\u5236\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>import java.io.FileInputStream;\nimport java.io.FileOutputStream;\nimport java.io.IOException;\n\npublic class Test {\n    public static void main(String[] args) {\n        try {\n            FileInputStream fis = new FileInputStream(\"source.txt\");\n            FileOutputStream fos = new FileOutputStream(\"target.txt\");\n            byte[] buffer = new byte[1024];\n            int len;\n            while ((len = fis.read(buffer)) != -1) {\n                fos.write(buffer, 0, len);\n            }\n            fis.close();\n            fos.close();\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"4\">\n<li>\u6587\u4ef6\u8def\u5f84\u64cd\u4f5c Java\u4e2d\u53ef\u4ee5\u4f7f\u7528File\u7c7b\u6765\u64cd\u4f5c\u6587\u4ef6\u8def\u5f84\u3002\u4ee5\u4e0b\u662fFile\u7c7b\u7684\u4e00\u4e9b\u5e38\u7528\u65b9\u6cd5\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>exists(): \u5224\u65ad\u6587\u4ef6\u662f\u5426\u5b58\u5728\u3002<\/li>\n\n\n\n<li>isDirectory(): \u5224\u65ad\u662f\u5426\u662f\u76ee\u5f55\u3002<\/li>\n\n\n\n<li>isFile(): \u5224\u65ad\u662f\u5426\u662f\u6587\u4ef6\u3002<\/li>\n\n\n\n<li>mkdir(): \u521b\u5efa\u76ee\u5f55\u3002<\/li>\n\n\n\n<li>createNewFile(): \u521b\u5efa\u6587\u4ef6\u3002<\/li>\n\n\n\n<li>delete(): \u5220\u9664\u6587\u4ef6\u6216\u76ee\u5f55\u3002<\/li>\n\n\n\n<li>list(): \u8fd4\u56de\u76ee\u5f55\u4e2d\u7684\u6587\u4ef6\u540d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528File\u7c7b\u64cd\u4f5c\u6587\u4ef6\u8def\u5f84\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>import java.io.File;\n\npublic class Test {\n    public static void main(String[] args) {\n        File file1 = new File(\"test.txt\");\n        System.out.println(file1.exists()); \/\/ \u8f93\u51fa\uff1atrue\n        System.out.println(file1.isDirectory()); \/\/ \u8f93\u51fa\uff1afalse\n        System.out.println(file1.isFile()); \/\/ \u8f93\u51fa\uff1atrue\n        File file2 = new File(\"mydir\");\n        System.out.println(file2.exists()); \/\/ \u8f93\u51fa\uff1afalse\n        file2.mkdir();\n        System.out.println(file2.exists()); \/\/ \u8f93\u51fa\uff1atrue\n        File file3 = new File(\"mydir\/test.txt\");\n        try {\n            file3.createNewFile();\n            System.out.println(file3.exists()); \/\/ \u8f93\u51fa\uff1atrue\n        } catch (IOException e) {\n            e\n<\/code><\/pre>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u5e38\u7528\u7c7b\u5e93\u7684\u5f02\u5e38\u5904\u7406<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u5f02\u5e38\u5904\u7406\u662f\u5e38\u89c1\u7684\u7f16\u7a0b\u6280\u672f\u4e4b\u4e00\uff0c\u7528\u4e8e\u5728\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u5904\u7406\u53ef\u80fd\u51fa\u73b0\u7684\u5f02\u5e38\u60c5\u51b5\u3002Java\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5f02\u5e38\u5904\u7406\u673a\u5236\u6765\u5904\u7406\u7a0b\u5e8f\u4e2d\u51fa\u73b0\u7684\u5f02\u5e38\u3002\u4ee5\u4e0b\u662fJava\u5e38\u7528\u7c7b\u5e93\u7684\u5f02\u5e38\u5904\u7406\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5f02\u5e38\u7c7b\u578b Java\u4e2d\u7684\u5f02\u5e38\u5206\u4e3a\u4e24\u79cd\u7c7b\u578b\uff1aChecked Exception\u548cUnchecked Exception\u3002Checked Exception\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u663e\u793a\u5730\u8fdb\u884c\u6355\u83b7\u6216\u58f0\u660e\u629b\u51fa\uff0c\u4f8b\u5982IOException\u3001ClassNotFoundException\u7b49\uff1b\u800cUnchecked Exception\u5219\u4e0d\u9700\u8981\u663e\u5f0f\u5730\u8fdb\u884c\u6355\u83b7\u6216\u58f0\u660e\u629b\u51fa\uff0c\u4f8b\u5982NullPointerException\u3001ArrayIndexOutOfBoundsException\u7b49\u3002<\/li>\n\n\n\n<li>\u5f02\u5e38\u5904\u7406\u673a\u5236 Java\u7684\u5f02\u5e38\u5904\u7406\u673a\u5236\u5305\u542b\u4e86try-catch\u8bed\u53e5\u5757\u3001finally\u8bed\u53e5\u5757\u548cthrow\u8bed\u53e5\u3002\u4ee5\u4e0b\u662f\u5404\u4e2a\u8bed\u53e5\u5757\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>try-catch\u8bed\u53e5\u5757\uff1a\u7528\u4e8e\u6355\u83b7\u548c\u5904\u7406\u5f02\u5e38\u3002try\u8bed\u53e5\u5757\u5305\u542b\u53ef\u80fd\u51fa\u73b0\u5f02\u5e38\u7684\u4ee3\u7801\uff0ccatch\u8bed\u53e5\u5757\u7528\u4e8e\u5904\u7406\u5f02\u5e38\u60c5\u51b5\u3002\u53ef\u4ee5\u5728try\u8bed\u53e5\u5757\u4e2d\u6355\u83b7\u591a\u4e2a\u5f02\u5e38\uff0c\u4e5f\u53ef\u4ee5\u5728catch\u8bed\u53e5\u5757\u4e2d\u6839\u636e\u5f02\u5e38\u7c7b\u578b\u8fdb\u884c\u4e0d\u540c\u7684\u5904\u7406\u3002\u4ee5\u4e0b\u662ftry-catch\u8bed\u53e5\u5757\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-preformatted\">phpCopy code<code>try {\n    \/\/ \u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (ExceptionType1 e) {\n    \/\/ \u5904\u7406\u5f02\u5e38\u7c7b\u578b1\u7684\u60c5\u51b5\n} catch (ExceptionType2 e) {\n    \/\/ \u5904\u7406\u5f02\u5e38\u7c7b\u578b2\u7684\u60c5\u51b5\n} catch (Exception e) {\n    \/\/ \u5904\u7406\u5176\u4ed6\u5f02\u5e38\u7c7b\u578b\u7684\u60c5\u51b5\n}\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>finally\u8bed\u53e5\u5757\uff1a\u7528\u4e8e\u5728try-catch\u8bed\u53e5\u5757\u6267\u884c\u7ed3\u675f\u540e\u6267\u884c\u4e00\u4e9b\u6e05\u7406\u64cd\u4f5c\uff0c\u4f8b\u5982\u5173\u95ed\u6587\u4ef6\u3001\u91ca\u653e\u8d44\u6e90\u7b49\u3002\u65e0\u8bbatry-catch\u8bed\u53e5\u5757\u4e2d\u662f\u5426\u51fa\u73b0\u5f02\u5e38\uff0cfinally\u8bed\u53e5\u5757\u90fd\u4f1a\u88ab\u6267\u884c\u3002\u4ee5\u4e0b\u662ffinally\u8bed\u53e5\u5757\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-preformatted\">phpCopy code<code>try {\n    \/\/ \u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (Exception e) {\n    \/\/ \u5904\u7406\u5f02\u5e38\u7684\u60c5\u51b5\n} finally {\n    \/\/ \u6e05\u7406\u64cd\u4f5c\n}\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>throw\u8bed\u53e5\uff1a\u7528\u4e8e\u629b\u51fa\u5f02\u5e38\u3002\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u4f7f\u7528throw\u8bed\u53e5\u629b\u51fa\u81ea\u5b9a\u4e49\u7684\u5f02\u5e38\u6216Java\u5185\u7f6e\u7684\u5f02\u5e38\u7c7b\u578b\u3002\u4ee5\u4e0b\u662fthrow\u8bed\u53e5\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>if (x &lt; 0) {\n    throw new IllegalArgumentException(\"x must be positive\");\n}\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u81ea\u5b9a\u4e49\u5f02\u5e38 Java\u4e2d\u53ef\u4ee5\u4f7f\u7528\u81ea\u5b9a\u4e49\u5f02\u5e38\u6765\u8868\u793a\u7279\u5b9a\u7684\u5f02\u5e38\u60c5\u51b5\u3002\u81ea\u5b9a\u4e49\u5f02\u5e38\u9700\u8981\u7ee7\u627f\u81eaException\u7c7b\u6216\u5b83\u7684\u5b50\u7c7b\u3002\u4ee5\u4e0b\u662f\u81ea\u5b9a\u4e49\u5f02\u5e38\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>public class MyException extends Exception {\n    public MyException(String message) {\n        super(message);\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u5b9e\u9645\u7f16\u7a0b\u4e2d\uff0c\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u548c\u573a\u666f\uff0c\u9009\u62e9\u5408\u9002\u7684\u5f02\u5e38\u5904\u7406\u65b9\u5f0f\u6765\u4fdd\u8bc1\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u6cdb\u578b<\/p>\n\n\n\n<p>Java\u4e2d\u7684\u6cdb\u578b\u662f\u4e00\u79cd\u9ad8\u7ea7\u7279\u6027\uff0c\u7528\u4e8e\u5c06\u7c7b\u578b\u53c2\u6570\u5316\u3002\u6cdb\u578b\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u91cd\u7528\uff0c\u53ef\u4ee5\u5728\u7f16\u8bd1\u65f6\u68c0\u67e5\u7c7b\u578b\u5b89\u5168\uff0c\u907f\u514d\u4e86\u7c7b\u578b\u8f6c\u6362\u9519\u8bef\u3002\u4ee5\u4e0b\u662fJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u6cdb\u578b\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6cdb\u578b\u7c7b \u6cdb\u578b\u7c7b\u662f\u4f7f\u7528\u6cdb\u578b\u7684\u7c7b\uff0c\u53ef\u4ee5\u5728\u7c7b\u5b9a\u4e49\u65f6\u6307\u5b9a\u4e00\u4e2a\u6216\u591a\u4e2a\u7c7b\u578b\u53c2\u6570\u3002\u4ee5\u4e0b\u662f\u6cdb\u578b\u7c7b\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>public class MyList&lt;E&gt; {\n    private E[] elements;\n\n    public MyList(int size) {\n        elements = (E[]) new Object[size];\n    }\n\n    public void add(E element) {\n        \/\/ \u6dfb\u52a0\u5143\u7d20\n    }\n\n    public E get(int index) {\n        \/\/ \u83b7\u53d6\u5143\u7d20\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u5b9a\u4e49\u6cdb\u578b\u7c7b\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u4efb\u610f\u6807\u8bc6\u7b26\u6765\u8868\u793a\u7c7b\u578b\u53c2\u6570\u3002\u4f8b\u5982E\u3001T\u3001K\u3001V\u7b49\u3002\u6cdb\u578b\u7c7b\u7684\u5b9e\u4f8b\u5316\u65f6\u9700\u8981\u6307\u5b9a\u7c7b\u578b\u53c2\u6570\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">vbnetCopy code<code>MyList&lt;String&gt; list = new MyList&lt;String&gt;(10);\nlist.add(\"Java\");\nString str = list.get(0);\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u6cdb\u578b\u65b9\u6cd5 \u6cdb\u578b\u65b9\u6cd5\u662f\u4f7f\u7528\u6cdb\u578b\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728\u65b9\u6cd5\u5b9a\u4e49\u65f6\u6307\u5b9a\u4e00\u4e2a\u6216\u591a\u4e2a\u7c7b\u578b\u53c2\u6570\u3002\u4ee5\u4e0b\u662f\u6cdb\u578b\u65b9\u6cd5\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">csharpCopy code<code>public class Test {\n    public &lt;T&gt; void printArray(T[] array) {\n        for (T element : array) {\n            System.out.println(element);\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u5b9a\u4e49\u6cdb\u578b\u65b9\u6cd5\u65f6\uff0c\u9700\u8981\u5728\u65b9\u6cd5\u8fd4\u56de\u7c7b\u578b\u4e4b\u524d\u4f7f\u7528\u7c7b\u578b\u53c2\u6570\uff0c\u4f8b\u5982&lt;T&gt;\u3002\u8c03\u7528\u6cdb\u578b\u65b9\u6cd5\u65f6\uff0c\u53ef\u4ee5\u663e\u793a\u5730\u6307\u5b9a\u7c7b\u578b\u53c2\u6570\uff0c\u4e5f\u53ef\u4ee5\u8ba9\u7f16\u8bd1\u5668\u81ea\u52a8\u63a8\u65ad\u7c7b\u578b\u53c2\u6570\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopy code<code>Test t = new Test();\nInteger[] nums = {1, 2, 3};\nString[] strs = {\"Java\", \"Python\", \"C++\"};\nt.printArray(nums);\nt.printArray(strs);\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u901a\u914d\u7b26 \u901a\u914d\u7b26\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u7c7b\u578b\u53c2\u6570\uff0c\u7528\u4e8e\u8868\u793a\u67d0\u4e2a\u7c7b\u578b\u7684\u5b50\u7c7b\u3002\u5728Java\u4e2d\uff0c\u6709\u4e24\u79cd\u901a\u914d\u7b26\uff1a\uff1f\u548c? extends T\u3002\uff1f\u8868\u793a\u4efb\u610f\u7c7b\u578b\uff0c? extends T\u8868\u793aT\u7c7b\u578b\u7684\u5b50\u7c7b\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u901a\u914d\u7b26\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">typescriptCopy code<code>public class Test {\n    public void printList(List&lt;?&gt; list) {\n        for (Object element : list) {\n            System.out.println(element);\n        }\n    }\n\n    public void printList2(List&lt;? extends Number&gt; list) {\n        for (Number element : list) {\n            System.out.println(element);\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u4f7f\u7528\u901a\u914d\u7b26\u65f6\uff0c\u53ef\u4ee5\u8ba9\u65b9\u6cd5\u63a5\u53d7\u4efb\u610f\u7c7b\u578b\u7684\u5217\u8868\uff0c\u6216\u8005\u9650\u5236\u5217\u8868\u5143\u7d20\u7684\u7c7b\u578b\u5fc5\u987b\u662f\u67d0\u4e2a\u7c7b\u578b\u7684\u5b50\u7c7b\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopy code<code>Test t = new Test();\nList&lt;String&gt; list1 = new ArrayList&lt;String&gt;();\nList&lt;Integer&gt; list2 = new ArrayList&lt;Integer&gt;();\nt.printList(list1);\nt.printList(list2);\nt.printList2(list2);\n<\/code><\/pre>\n\n\n\n<p>Java\u7684\u6cdb\u578b\u673a\u5236\u63d0\u4f9b\u4e86\u4e00\u79cd\u5f3a\u7c7b\u578b\u68c0\u67e5\u673a\u5236\uff0c\u53ef\u4ee5\u5728\u7f16\u8bd1\u65f6\u68c0\u67e5\u7c7b\u578b\u5b89\u5168\uff0c\u907f\u514d\u4e86\u7c7b\u578b\u8f6c\u6362\u9519\u8bef\uff0c\u589e\u5f3a\u4e86\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u53cd\u5c04<\/p>\n\n\n\n<p>Java\u4e2d\u7684\u53cd\u5c04\u662f\u4e00\u79cd\u9ad8\u7ea7\u7279\u6027\uff0c\u7528\u4e8e\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u83b7\u53d6\u7c7b\u7684\u4fe1\u606f\u3001\u64cd\u4f5c\u5bf9\u8c61\u3001\u8c03\u7528\u65b9\u6cd5\u7b49\u3002Java\u53cd\u5c04\u673a\u5236\u662fJava\u8bed\u8a00\u7684\u52a8\u6001\u6027\u548c\u6269\u5c55\u6027\u7684\u91cd\u8981\u4f53\u73b0\u3002\u4ee5\u4e0b\u662fJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u53cd\u5c04\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u83b7\u53d6\u7c7b\u7684\u4fe1\u606f Java\u53cd\u5c04\u53ef\u4ee5\u83b7\u53d6\u4e00\u4e2a\u7c7b\u7684\u4fe1\u606f\uff0c\u4f8b\u5982\u7c7b\u7684\u540d\u79f0\u3001\u7236\u7c7b\u3001\u63a5\u53e3\u3001\u5b57\u6bb5\u3001\u65b9\u6cd5\u7b49\u3002\u53ef\u4ee5\u4f7f\u7528Class\u7c7b\u4e2d\u7684\u5404\u79cd\u65b9\u6cd5\u6765\u83b7\u53d6\u7c7b\u7684\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u83b7\u53d6\u7c7b\u4fe1\u606f\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">lessCopy code<code>Class&lt;?&gt; cls = Test.class;\nSystem.out.println(\"Class name: \" + cls.getName());\nSystem.out.println(\"Superclass name: \" + cls.getSuperclass().getName());\nSystem.out.println(\"Interfaces: \");\nfor (Class&lt;?&gt; interfaceClass : cls.getInterfaces()) {\n    System.out.println(\"\\t\" + interfaceClass.getName());\n}\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u521b\u5efa\u5bf9\u8c61 Java\u53cd\u5c04\u53ef\u4ee5\u901a\u8fc7Class\u5bf9\u8c61\u6765\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u7684\u5b9e\u4f8b\u3002\u53ef\u4ee5\u4f7f\u7528newInstance()\u65b9\u6cd5\u6765\u521b\u5efa\u4e00\u4e2a\u7c7b\u7684\u5b9e\u4f8b\u3002\u4ee5\u4e0b\u662f\u521b\u5efa\u5bf9\u8c61\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">vbnetCopy code<code>Class&lt;?&gt; cls = Test.class;\nObject obj = cls.newInstance();\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u64cd\u4f5c\u5b57\u6bb5 Java\u53cd\u5c04\u53ef\u4ee5\u83b7\u53d6\u548c\u8bbe\u7f6e\u5bf9\u8c61\u7684\u5b57\u6bb5\u503c\u3002\u53ef\u4ee5\u4f7f\u7528getField()\u3001getDeclaredField()\u3001setField()\u3001setDeclaredField()\u7b49\u65b9\u6cd5\u6765\u83b7\u53d6\u548c\u8bbe\u7f6e\u5b57\u6bb5\u503c\u3002\u4ee5\u4e0b\u662f\u64cd\u4f5c\u5b57\u6bb5\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">vbnetCopy code<code>Class&lt;?&gt; cls = Test.class;\nObject obj = cls.newInstance();\nField field = cls.getDeclaredField(\"name\");\nfield.setAccessible(true);\nfield.set(obj, \"Java\");\nString name = (String) field.get(obj);\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"4\">\n<li>\u8c03\u7528\u65b9\u6cd5 Java\u53cd\u5c04\u53ef\u4ee5\u8c03\u7528\u4e00\u4e2a\u5bf9\u8c61\u7684\u65b9\u6cd5\u3002\u53ef\u4ee5\u4f7f\u7528getMethod()\u3001getDeclaredMethod()\u3001invoke()\u7b49\u65b9\u6cd5\u6765\u8c03\u7528\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u8c03\u7528\u65b9\u6cd5\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">vbnetCopy code<code>Class&lt;?&gt; cls = Test.class;\nObject obj = cls.newInstance();\nMethod method = cls.getDeclaredMethod(\"sayHello\", String.class);\nmethod.setAccessible(true);\nString result = (String) method.invoke(obj, \"Java\");\nSystem.out.println(result);\n<\/code><\/pre>\n\n\n\n<p>Java\u7684\u53cd\u5c04\u673a\u5236\u4e3a\u7a0b\u5e8f\u63d0\u4f9b\u4e86\u52a8\u6001\u6027\u548c\u6269\u5c55\u6027\uff0c\u4f7f\u5f97\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\u53ef\u4ee5\u52a8\u6001\u5730\u52a0\u8f7d\u548c\u6267\u884c\u7c7b\u3001\u5bf9\u8c61\u3001\u65b9\u6cd5\u7b49\u3002\u53cd\u5c04\u7684\u4f7f\u7528\u9700\u8981\u614e\u91cd\uff0c\u4e0d\u5f53\u7684\u4f7f\u7528\u53ef\u80fd\u4f1a\u5f71\u54cd\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u6ce8\u89e3<\/p>\n\n\n\n<p>Java\u4e2d\u7684\u6ce8\u89e3\u662f\u4e00\u79cd\u9ad8\u7ea7\u7279\u6027\uff0c\u7528\u4e8e\u7ed9\u7a0b\u5e8f\u5143\u7d20\u6dfb\u52a0\u5143\u6570\u636e\uff08metadata\uff09\u548c\u8bf4\u660e\u4fe1\u606f\u3002Java\u6ce8\u89e3\u53ef\u4ee5\u5728\u7f16\u8bd1\u65f6\u548c\u8fd0\u884c\u65f6\u88ab\u5904\u7406\uff0c\u53ef\u4ee5\u7528\u4e8e\u751f\u6210\u6587\u6863\u3001\u7f16\u8bd1\u68c0\u67e5\u3001\u8fd0\u884c\u65f6\u5904\u7406\u7b49\u3002\u4ee5\u4e0b\u662fJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u6ce8\u89e3\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5b9a\u4e49\u6ce8\u89e3 Java\u6ce8\u89e3\u7684\u5b9a\u4e49\u7c7b\u4f3c\u4e8eJava\u63a5\u53e3\uff0c\u4f7f\u7528@interface\u5173\u952e\u5b57\u6765\u5b9a\u4e49\u3002\u6ce8\u89e3\u7684\u6210\u5458\u53d8\u91cf\u4f7f\u7528\u65b9\u6cd5\u7684\u5f62\u5f0f\u6765\u5b9a\u4e49\u3002\u4ee5\u4e0b\u662f\u5b9a\u4e49\u6ce8\u89e3\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">lessCopy code<code>@Target(ElementType.METHOD)\n@Retention(RetentionPolicy.RUNTIME)\npublic @interface MyAnnotation {\n    String name();\n    int age() default 0;\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u5b9a\u4e49\u6ce8\u89e3\u65f6\uff0c\u9700\u8981\u6307\u5b9a\u6ce8\u89e3\u7684\u4f7f\u7528\u8303\u56f4\u548c\u751f\u547d\u5468\u671f\u3002\u53ef\u4ee5\u4f7f\u7528@Target\u548c@Retention\u6ce8\u89e3\u6765\u6307\u5b9a\u3002@Target\u6ce8\u89e3\u6307\u5b9a\u4e86\u6ce8\u89e3\u7684\u4f7f\u7528\u8303\u56f4\uff0c\u4f8b\u5982\u7c7b\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\u7b49\u3002@Retention\u6ce8\u89e3\u6307\u5b9a\u4e86\u6ce8\u89e3\u7684\u751f\u547d\u5468\u671f\uff0c\u4f8b\u5982\u6e90\u4ee3\u7801\u3001\u7f16\u8bd1\u65f6\u3001\u8fd0\u884c\u65f6\u7b49\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u5e94\u7528\u6ce8\u89e3 Java\u6ce8\u89e3\u53ef\u4ee5\u5e94\u7528\u4e8e\u7c7b\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\u7b49\u7a0b\u5e8f\u5143\u7d20\u4e2d\u3002\u53ef\u4ee5\u4f7f\u7528@\u7b26\u53f7\u6765\u5e94\u7528\u6ce8\u89e3\u3002\u4ee5\u4e0b\u662f\u5e94\u7528\u6ce8\u89e3\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">kotlinCopy code<code>@MyAnnotation(name = \"Java\", age = 20)\npublic class Test {\n    @MyAnnotation(name = \"Java\", age = 20)\n    public void sayHello(String name) {\n        System.out.println(\"Hello \" + name);\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u5e94\u7528\u6ce8\u89e3\u65f6\uff0c\u9700\u8981\u63d0\u4f9b\u6ce8\u89e3\u7684\u6210\u5458\u53d8\u91cf\u7684\u503c\u3002\u53ef\u4ee5\u4f7f\u7528\u7b49\u53f7\u6765\u6307\u5b9a\u6210\u5458\u53d8\u91cf\u7684\u503c\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u9ed8\u8ba4\u503c\u3002\u6ce8\u89e3\u7684\u6210\u5458\u53d8\u91cf\u53ef\u4ee5\u662f\u57fa\u672c\u7c7b\u578b\u3001\u5b57\u7b26\u4e32\u3001\u679a\u4e3e\u3001\u6ce8\u89e3\u3001\u6570\u7ec4\u7b49\u7c7b\u578b\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u5904\u7406\u6ce8\u89e3 Java\u6ce8\u89e3\u53ef\u4ee5\u5728\u7f16\u8bd1\u65f6\u3001\u8fd0\u884c\u65f6\u88ab\u5904\u7406\u3002\u53ef\u4ee5\u4f7f\u7528Java\u53cd\u5c04\u673a\u5236\u6765\u5904\u7406\u6ce8\u89e3\u3002\u4ee5\u4e0b\u662f\u5904\u7406\u6ce8\u89e3\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">kotlinCopy code<code>Class&lt;?&gt; cls = Test.class;\nMyAnnotation annotation = cls.getAnnotation(MyAnnotation.class);\nif (annotation != null) {\n    String name = annotation.name();\n    int age = annotation.age();\n    System.out.println(\"Name: \" + name);\n    System.out.println(\"Age: \" + age);\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u5904\u7406\u6ce8\u89e3\u65f6\uff0c\u9700\u8981\u4f7f\u7528Class\u7c7b\u7684getAnnotation()\u65b9\u6cd5\u6765\u83b7\u53d6\u6ce8\u89e3\u4fe1\u606f\u3002\u53ef\u4ee5\u6839\u636e\u6ce8\u89e3\u7684\u6210\u5458\u53d8\u91cf\u7684\u503c\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002<\/p>\n\n\n\n<p>Java\u7684\u6ce8\u89e3\u673a\u5236\u63d0\u4f9b\u4e86\u4e00\u79cd\u4fbf\u6377\u7684\u65b9\u5f0f\u6765\u4e3a\u7a0b\u5e8f\u5143\u7d20\u6dfb\u52a0\u8bf4\u660e\u4fe1\u606f\u3002\u6ce8\u89e3\u7684\u4f7f\u7528\u9700\u8981\u614e\u91cd\uff0c\u4e0d\u5f53\u7684\u4f7f\u7528\u53ef\u80fd\u4f1a\u5f71\u54cd\u7a0b\u5e8f\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u679a\u4e3e<\/p>\n\n\n\n<p>Java\u4e2d\u7684\u679a\u4e3e\u662f\u4e00\u79cd\u9ad8\u7ea7\u7279\u6027\uff0c\u7528\u4e8e\u8868\u793a\u6709\u9650\u4e2a\u6570\u7684\u5e38\u91cf\u96c6\u5408\u3002\u679a\u4e3e\u5728Java\u4e2d\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u7c7b\uff0c\u53ef\u4ee5\u6709\u81ea\u5df1\u7684\u5b57\u6bb5\u3001\u65b9\u6cd5\u548c\u6784\u9020\u51fd\u6570\u3002Java\u679a\u4e3e\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u4ee5\u4e0b\u662fJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u679a\u4e3e\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5b9a\u4e49\u679a\u4e3e Java\u679a\u4e3e\u4f7f\u7528enum\u5173\u952e\u5b57\u6765\u5b9a\u4e49\uff0c\u679a\u4e3e\u5e38\u91cf\u4f7f\u7528\u5927\u5199\u5b57\u6bcd\u8868\u793a\u3002\u4ee5\u4e0b\u662f\u5b9a\u4e49\u679a\u4e3e\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>public enum Weekday {\n    MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY;\n}\n<\/code><\/pre>\n\n\n\n<p>\u5728\u5b9a\u4e49\u679a\u4e3e\u65f6\uff0c\u53ef\u4ee5\u4e3a\u679a\u4e3e\u5e38\u91cf\u5b9a\u4e49\u5b57\u6bb5\u3001\u65b9\u6cd5\u548c\u6784\u9020\u51fd\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">arduinoCopy code<code>public enum Weekday {\n    MONDAY(\"\u661f\u671f\u4e00\"), TUESDAY(\"\u661f\u671f\u4e8c\"), WEDNESDAY(\"\u661f\u671f\u4e09\"), THURSDAY(\"\u661f\u671f\u56db\"), FRIDAY(\"\u661f\u671f\u4e94\"), SATURDAY(\"\u661f\u671f\u516d\"), SUNDAY(\"\u661f\u671f\u65e5\");\n\n    private String name;\n\n    private Weekday(String name) {\n        this.name = name;\n    }\n\n    public String getName() {\n        return name;\n    }\n}\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u4f7f\u7528\u679a\u4e3e Java\u679a\u4e3e\u53ef\u4ee5\u50cf\u5176\u4ed6\u7c7b\u4e00\u6837\u4f7f\u7528\u3002\u53ef\u4ee5\u4f7f\u7528\u679a\u4e3e\u5e38\u91cf\u6765\u521b\u5efa\u679a\u4e3e\u5bf9\u8c61\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u679a\u4e3e\u5e38\u91cf\u8c03\u7528\u679a\u4e3e\u7684\u65b9\u6cd5\u548c\u5b57\u6bb5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u679a\u4e3e\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>Weekday day = Weekday.MONDAY;\nString name = day.getName();\nSystem.out.println(name);\n<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u679a\u4e3e\u5e38\u91cf Java\u679a\u4e3e\u5e38\u91cf\u53ef\u4ee5\u5305\u542b\u81ea\u5df1\u7684\u5b57\u6bb5\u548c\u65b9\u6cd5\u3002\u679a\u4e3e\u5e38\u91cf\u4e5f\u53ef\u4ee5\u91cd\u8f7d\u65b9\u6cd5\uff0c\u4f7f\u6bcf\u4e2a\u5e38\u91cf\u62e5\u6709\u4e0d\u540c\u7684\u884c\u4e3a\u3002\u4ee5\u4e0b\u662f\u679a\u4e3e\u5e38\u91cf\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">typescriptCopy code<code>public enum Weekday {\n    MONDAY(\"\u661f\u671f\u4e00\") {\n        @Override\n        public void sayHello() {\n            System.out.println(\"Hello, Monday\");\n        }\n    }, \n    TUESDAY(\"\u661f\u671f\u4e8c\") {\n        @Override\n        public void sayHello() {\n            System.out.println(\"Hello, Tuesday\");\n        }\n    }, \n    WEDNESDAY(\"\u661f\u671f\u4e09\") {\n        @Override\n        public void sayHello() {\n            System.out.println(\"Hello, Wednesday\");\n        }\n    }, \n    THURSDAY(\"\u661f\u671f\u56db\") {\n        @Override\n        public void sayHello() {\n            System.out.println(\"Hello, Thursday\");\n        }\n    }, \n    FRIDAY(\"\u661f\u671f\u4e94\") {\n        @Override\n        public void sayHello() {\n            System.out.println(\"Hello, Friday\");\n        }\n    }, \n    SATURDAY(\"\u661f\u671f\u516d\") {\n        @Override\n        public void sayHello() {\n            System.out.println(\"Hello, Saturday\");\n        }\n    }, \n    SUNDAY(\"\u661f\u671f\u65e5\") {\n        @Override\n        public void sayHello() {\n            System.out.println(\"Hello, Sunday\");\n        }\n    };\n\n    private String name;\n\n    private Weekday(String name) {\n        this.name = name;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public abstract void sayHello();\n}\n<\/code><\/pre>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>\u8bf7\u8be6\u7ec6\u89e3\u91caJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u591a\u7ebf\u7a0b\u7a0b\u5e8f<\/p>\n\n\n\n<p>Java\u4e2d\u7684\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u662f\u4e00\u79cd\u9ad8\u7ea7\u7279\u6027\uff0c\u7528\u4e8e\u540c\u65f6\u6267\u884c\u591a\u4e2a\u7ebf\u7a0b\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u5e76\u53d1\u6027\u548c\u6027\u80fd\u3002Java\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u7ee7\u627fThread\u7c7b\u3001\u5b9e\u73b0Runnable\u63a5\u53e3\u3001\u4f7f\u7528\u7ebf\u7a0b\u6c60\u7b49\u65b9\u5f0f\u6765\u521b\u5efa\u7ebf\u7a0b\u3002\u4ee5\u4e0b\u662fJava\u9ad8\u7ea7\u7279\u6027\u4e2d\u7684\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u7684\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7ee7\u627fThread\u7c7b Java\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u7ee7\u627fThread\u7c7b\u6765\u521b\u5efa\u7ebf\u7a0b\u3002\u7ee7\u627fThread\u7c7b\u540e\uff0c\u9700\u8981\u91cd\u5199run()\u65b9\u6cd5\u6765\u5b9e\u73b0\u7ebf\u7a0b\u7684\u903b\u8f91\u3002\u4ee5\u4e0b\u662f\u7ee7\u627fThread\u7c7b\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>public class MyThread extends Thread {\n    @Override\n    public void run() {\n        \/\/ \u7ebf\u7a0b\u903b\u8f91\n    }\n}\n\nMyThread thread = new MyThread();\nthread.start();\n<\/code><\/pre>\n\n\n\n<p>\u5728\u521b\u5efa\u7ebf\u7a0b\u540e\uff0c\u9700\u8981\u4f7f\u7528start()\u65b9\u6cd5\u6765\u542f\u52a8\u7ebf\u7a0b\u3002start()\u65b9\u6cd5\u4f1a\u8c03\u7528run()\u65b9\u6cd5\u6765\u6267\u884c\u7ebf\u7a0b\u7684\u903b\u8f91\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u5b9e\u73b0Runnable\u63a5\u53e3 Java\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0Runnable\u63a5\u53e3\u6765\u521b\u5efa\u7ebf\u7a0b\u3002\u5b9e\u73b0Runnable\u63a5\u53e3\u540e\uff0c\u9700\u8981\u5c06\u5b9e\u73b0\u7c7b\u4f20\u9012\u7ed9Thread\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u6765\u521b\u5efa\u7ebf\u7a0b\u3002\u4ee5\u4e0b\u662f\u5b9e\u73b0Runnable\u63a5\u53e3\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopy code<code>public class MyRunnable implements Runnable {\n    @Override\n    public void run() {\n        \/\/ \u7ebf\u7a0b\u903b\u8f91\n    }\n}\n\nMyRunnable runnable = new MyRunnable();\nThread thread = new Thread(runnable);\nthread.start();\n<\/code><\/pre>\n\n\n\n<p>\u5728\u521b\u5efa\u7ebf\u7a0b\u65f6\uff0c\u9700\u8981\u5c06\u5b9e\u73b0Runnable\u63a5\u53e3\u7684\u5bf9\u8c61\u4f20\u9012\u7ed9Thread\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5b9e\u73b0Runnable\u63a5\u53e3\u6bd4\u7ee7\u627fThread\u7c7b\u66f4\u52a0\u7075\u6d3b\uff0c\u56e0\u4e3a\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\uff0c\u4f46\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u7c7b\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li>\u7ebf\u7a0b\u6c60 Java\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u53ef\u4ee5\u4f7f\u7528\u7ebf\u7a0b\u6c60\u6765\u7ba1\u7406\u548c\u590d\u7528\u7ebf\u7a0b\u3002\u7ebf\u7a0b\u6c60\u53ef\u4ee5\u51cf\u5c11\u7ebf\u7a0b\u7684\u521b\u5efa\u548c\u9500\u6bc1\u6240\u9700\u7684\u5f00\u9500\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u54cd\u5e94\u901f\u5ea6\u3002Java\u7ebf\u7a0b\u6c60\u53ef\u4ee5\u4f7f\u7528Executors\u7c7b\u6765\u521b\u5efa\u3002\u4ee5\u4e0b\u662f\u7ebf\u7a0b\u6c60\u7684\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopy code<code>ExecutorService executor = Executors.newFixedThreadPool(10);\nfor (int i = 0; i &lt; 100; i++) {\n    executor.execute(new MyRunnable());\n}\nexecutor.shutdown();\n<\/code><\/pre>\n\n\n\n<p>\u5728\u521b\u5efa\u7ebf\u7a0b\u6c60\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528execute()\u65b9\u6cd5\u6765\u63d0\u4ea4\u4efb\u52a1\u3002\u5f53\u4efb\u52a1\u5b8c\u6210\u540e\uff0c\u7ebf\u7a0b\u6c60\u4f1a\u590d\u7528\u7ebf\u7a0b\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4f7f\u7528\u7ebf\u7a0b\u6c60\u65f6\u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u6765\u9009\u62e9\u7ebf\u7a0b\u6c60\u7684\u7c7b\u578b\u548c\u5927\u5c0f\uff0c\u907f\u514d\u8d44\u6e90\u7684\u6d6a\u8d39\u548c\u7ebf\u7a0b\u7684\u963b\u585e\u3002<\/p>\n\n\n\n<p>Java\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u8fd8\u6d89\u53ca\u5230\u7ebf\u7a0b\u7684\u72b6\u6001\u3001\u540c\u6b65\u3001\u9501\u3001\u7ebf\u7a0b\u95f4\u901a\u4fe1\u7b49\u65b9\u9762\u7684\u77e5\u8bc6\u3002\u4f7f\u7528\u591a\u7ebf\u7a0b\u65f6\u9700\u8981\u6ce8\u610f\u7ebf\u7a0b\u5b89\u5168\u548c\u6027\u80fd\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&amp;w=64&amp;q=75\" alt=\"gun tei\"\/><\/figure>\n\n\n\n<p>Github\u4e0a\u6709\u54ea\u4e9b\u57fa\u4e8eJava\u7684\u4f18\u79c0\u7cfb\u7edf<\/p>\n\n\n\n<p>Github\u4e0a\u6709\u8bb8\u591a\u57fa\u4e8eJava\u7684\u4f18\u79c0\u7cfb\u7edf\uff0c\u4ee5\u4e0b\u662f\u5176\u4e2d\u4e00\u4e9b\u6bd4\u8f83\u53d7\u6b22\u8fce\u548c\u5e7f\u6cdb\u4f7f\u7528\u7684\u7cfb\u7edf\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Spring Framework\uff1aSpring\u662f\u4e00\u4e2a\u5168\u6808\u5f0f\u7684Java\u5f00\u53d1\u6846\u67b6\uff0c\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u7279\u6027\u548c\u7ec4\u4ef6\uff0c\u5305\u62ec\u4f9d\u8d56\u6ce8\u5165\u3001AOP\u3001ORM\u3001\u4e8b\u52a1\u7ba1\u7406\u3001Web\u5f00\u53d1\u7b49\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u4f01\u4e1a\u7ea7Java\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u3002<\/li>\n\n\n\n<li>Apache Hadoop\uff1aHadoop\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5206\u5e03\u5f0f\u8ba1\u7b97\u7cfb\u7edf\uff0c\u7528\u4e8e\u5b58\u50a8\u548c\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u3002Hadoop\u57fa\u4e8eJava\u8bed\u8a00\u5f00\u53d1\uff0c\u652f\u6301MapReduce\u8ba1\u7b97\u6a21\u578b\u548c\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edfHDFS\u3002<\/li>\n\n\n\n<li>Elasticsearch\uff1aElasticsearch\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5168\u6587\u641c\u7d22\u5f15\u64ce\uff0c\u57fa\u4e8eLucene\u641c\u7d22\u5e93\uff0c\u7528\u4e8e\u5b58\u50a8\u3001\u641c\u7d22\u548c\u5206\u6790\u5927\u89c4\u6a21\u6570\u636e\u3002Elasticsearch\u4f7f\u7528Java\u8bed\u8a00\u7f16\u5199\uff0c\u5177\u6709\u9ad8\u53ef\u7528\u6027\u3001\u9ad8\u6027\u80fd\u548c\u6613\u4e8e\u6269\u5c55\u7684\u7279\u70b9\u3002<\/li>\n\n\n\n<li>Apache Cassandra\uff1aCassandra\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7684NoSQL\u6570\u636e\u5e93\uff0c\u7528\u4e8e\u5b58\u50a8\u5927\u89c4\u6a21\u6570\u636e\u3002Cassandra\u57fa\u4e8eJava\u8bed\u8a00\u5f00\u53d1\uff0c\u5177\u6709\u9ad8\u53ef\u7528\u6027\u3001\u9ad8\u6027\u80fd\u548c\u6613\u4e8e\u6269\u5c55\u7684\u7279\u70b9\u3002<\/li>\n\n\n\n<li>Apache ZooKeeper\uff1aZooKeeper\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7684\u534f\u8c03\u670d\u52a1\uff0c\u7528\u4e8e\u7ba1\u7406\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u914d\u7f6e\u4fe1\u606f\u3001\u5143\u6570\u636e\u548c\u72b6\u6001\u4fe1\u606f\u3002ZooKeeper\u57fa\u4e8eJava\u8bed\u8a00\u5f00\u53d1\uff0c\u5177\u6709\u9ad8\u53ef\u7528\u6027\u3001\u9ad8\u6027\u80fd\u548c\u53ef\u9760\u6027\u7684\u7279\u70b9\u3002<\/li>\n\n\n\n<li>JHipster\uff1aJHipster\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5e94\u7528\u7a0b\u5e8f\u751f\u6210\u5668\uff0c\u7528\u4e8e\u751f\u6210\u73b0\u4ee3\u5316\u7684Web\u5e94\u7528\u7a0b\u5e8f\u3002JHipster\u57fa\u4e8eSpring 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