{"id":1334,"date":"2024-12-15T21:13:58","date_gmt":"2024-12-15T13:13:58","guid":{"rendered":"http:\/\/ericw.top\/?p=1334"},"modified":"2025-09-05T15:31:19","modified_gmt":"2025-09-05T07:31:19","slug":"java%e5%9f%ba%e7%a1%80%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"http:\/\/ericw.top\/?p=1334","title":{"rendered":"JAVA\u57fa\u7840\u7b14\u8bb0 (\u4e0a)"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\" id=\"toc-0\">\u4e00\u3001\u8ba1\u7b97\u673a\u57fa\u7840\u77e5\u8bc6<\/h1>\n\n\n\n<p>\u5728JAVA\u6b63\u5f0f\u5f00\u59cb\u4e4b\u524d\uff0c\u6211\u4eec\u9996\u5148\u4e86\u89e3\u4e00\u4e0b\u8ba1\u7b97\u673a\u77e5\u8bc6<\/p>\n\n\n\n<p>\u8ba1\u7b97\u673a\u5c31\u662f  <strong>\u7535\u8111<\/strong>  <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-1\">1.1 \u8ba1\u7b97\u673a\u7684\u7531\u6765<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"747\" height=\"494\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-1.png\" alt=\"\" class=\"wp-image-1338\" style=\"width:507px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-1.png 747w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-1-300x198.png 300w\" sizes=\"(max-width: 747px) 100vw, 747px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<p><strong>\u7b2c\u4e00\u53f0\u901a\u7528\u8ba1\u7b97\u673a ENIAC<\/strong><\/p>\n\n\n\n<p>\u6218\u4e89\u65f6\u671f\uff0c\u7f8e\u56fd\u56fd\u9632\u90e8\u7528\u5b83\u6765\u8fdb\u884c\u5f39\u9053\u8ba1\u7b97\u3002<\/p>\n\n\n\n<p>\u753118000\u4e2a\u7535\u5b50\u7ba1\u7ec4\u6210\uff0c\u5360\u5730170\u5e73\u65b9\u7c73\uff0c\u91cd\u8fbe30\u5428\uff0c\u8017\u7535\u529f\u7387150\u5343\u74e6\uff0c\u6bcf\u79d2\u8fdb\u884c5000\u6b21\u8fd0\u7b97\u3002<\/p>\n<\/div>\n<\/div>\n\n\n\n<p>\u968f\u7740\u65f6\u4ee3\u8fdb\u6b65\uff0c\u8ba1\u7b97\u673a\u7684\u4f53\u79ef\u4e0d\u65ad\u51cf\u5c0f\uff0c\u5230\u73b0\u5728\u7684\u7b14\u8bb0\u672c\u7535\u8111<\/p>\n\n\n\n<p>\u4f46\u662f\u4ece\u59cb\u81f3\u7ec8\uff0c\u8ba1\u7b97\u673a\u7684\u4f5c\u7528\u6ca1\u6709\u53d8\uff0c\u5c31\u662f<strong>\u6570\u636e\u5904\u7406\u548c\u8fd0\u7b97<\/strong><\/p>\n\n\n\n<p>\u7f16\u7a0b\u5f00\u53d1\u5176\u5b9e\u4e5f\u662f\u4e00\u79cd\u6570\u636e\u5904\u7406\u548c\u8fd0\u7b97\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-2\">1.2 \u8ba1\u7b97\u673a\u4e2d\u6570\u636e\u7684\u5b58\u50a8\u548c\u8fd0\u7b97<\/h2>\n\n\n\n<ul>\n<li>\u7ed3\u8bba\uff1a\u8ba1\u7b97\u673a\u4e2d\u5bf9\u4e8e\u6570\u636e\u7684\u5b58\u50a8\u548c\u8fd0\u7b97\uff0c\u90fd\u662f\u901a\u8fc7\u4e8c\u8fdb\u5236\u6570\u636e\u6765\u5b8c\u6210\u7684\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u4e8c\u8fdb\u5236<\/strong>\uff1a\u4e8c\u8fdb\u5236\u6570\u636e\u5c31\u662f\u75280\u548c1\u4e24\u4e2a\u6570\u7801\u6765\u8868\u793a\u7684<br>\u8fdb\u5236\u89c4\u5219\u662f\u201c\u9022\u4e8c\u8fdb\u4e00\u201d\uff0c\u501f\u4f4d\u89c4\u5219\u662f\u201c\u501f\u4e00\u5f53\u4e8c\u201d\u3002<\/p>\n\n\n\n<p>\u8ba1\u7b97\u673a\u90fd\u662f\u7531\u7535\u8def\u7ec4\u6210\u7684\uff0c\u7535\u8def\u4e00\u822c\u5206\u4e3a\u201c\u901a\u7535\u201d\u548c\u201c\u4e0d\u901a\u7535\u201d<br>\u8ba1\u7b97\u673a\u5e95\u5c42\u90fd\u662f\u786c\u4ef6\u7535\u8def\uff0c\u53ef\u4ee5\u901a\u8fc7\u4e0d\u901a\u7535\uff0c\u901a\u7535\uff0c\u8868\u793a0\u30011\u3002<\/p>\n\n\n\n<p>\u8ba1\u7b97\u673a\u4e2d\u5b58\u50a8\u6570\u636e\u7684\u5355\u4f4d\u662f\u5b57\u8282 byte<br>\u6bcf\u4e2a\u5b57\u8282\u75318\u4f4d\u7ec4\u6210  1 byte=8 bit<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-3\">1.3 \u4eba\u673a\u4ea4\u4e92\u65b9\u5f0f<\/h2>\n\n\n\n<p>\u65e9\u671f\u8ba1\u7b97\u673a\u6ca1\u6709\u56fe\u5f62\u5316\u754c\u9762\uff0c\u90fd\u662f\u4ee5\u6307\u4ee4\u7684\u65b9\u5f0f\u6765\u64cd\u4f5c\u8ba1\u7b97\u673a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"290\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-2-1024x290.png\" alt=\"\" class=\"wp-image-1341\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-2-1024x290.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-2-300x85.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-2-768x218.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-2.png 1310w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u547d\u4ee4\u884c\u7684\u64cd\u4f5c\u65b9\u5f0f  \u8fd0\u884c\u901f\u5ea6\u5feb  \u6d88\u8017\u5185\u5b58\u5c0f  \u5728\u670d\u52a1\u5668\u4e2d\u5e38\u7528\u547d\u4ee4\u884c\u64cd\u4f5c<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-4\">1.4 DOS\u547d\u4ee4\u884c<\/h2>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-1 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"573\" height=\"356\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-3.png\" alt=\"\" class=\"wp-image-1342\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-3.png 573w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-3-300x186.png 300w\" sizes=\"(max-width: 573px) 100vw, 573px\" \/><\/figure>\n\n\n\n<p>\u6309\u4f4fWin+R\uff0c\u5728\u8fd0\u884c\u8f93\u5165\u6846\u4e2d<br>\u8f93\u5165cmd\uff0c\u6572\u56de\u8f66\u3002<br>\u5373\u53ef\u6253\u5f00DOS\u547d\u4ee4\u63d0\u793a\u7b26\u7a97\u53e3<\/p>\n<\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>\u5e38\u7528DOS\u547d\u4ee4<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table aligncenter\"><table><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">                 <strong>\u7b26\u53f7<\/strong>                <\/td><td class=\"has-text-align-left\" data-align=\"left\">                                                      <strong>\u8bf4\u660e<\/strong>                                                      <\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u76d8\u7b26\u540d\u79f0\uff1a<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u76d8\u7b26\u5207\u6362\u3002 E: \u56de\u8f66\uff0c\u8868\u793a\u5207\u6362\u5230E\u76d8<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">dir<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u67e5\u770b\u5f53\u524d\u8def\u5f84\u4e0b\u7684\u5185\u5bb9\u3002<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">cd \u76ee\u5f55<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u8fdb\u5165\u5355\u7ea7\u76ee\u5f55\u3002 cd itheima<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">cd..<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u56de\u9000\u4e0a\u4e00\u7ea7\u76ee\u5f55\u3002<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">cd \u76ee\u5f551\\\u76ee\u5f552\\...<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u8fdb\u5165\u591a\u7ea7\u76ee\u5f55\u3002cd itheima\\JavaSE<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">cd\\<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u56de\u9000\u5230\u76d8\u7b26\u76ee\u5f55<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">cls<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u6e05\u5c4f<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">exit<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u9000\u51fa\u547d\u4ee4\u63d0\u793a\u7b26\u7a97\u53e3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-5\">1.5 Path \u73af\u5883\u53d8\u91cf<\/h2>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-2 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"265\" height=\"379\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-4.png\" alt=\"\" class=\"wp-image-1345\" style=\"width:178px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-4.png 265w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-4-210x300.png 210w\" sizes=\"(max-width: 265px) 100vw, 265px\" \/><\/figure>\n\n\n\n<p><strong>Path\u73af\u5883\u53d8\u91cf<br><\/strong>\u53ef\u4ee5\u7406\u89e3\u4e3a\u7cfb\u7edf\u4e2d\u7684\u4e00\u4e2a\u5927\u7ba1\u5bb6\uff0c\u5e2e\u6211\u4eec\u8bb0\u5f55\u4e86\u5f88\u591a\u8f6f\u4ef6\u7684\u5b8c\u6574\u8def\u5f84<br>\u5f53\u6211\u4eec\u8981\u8fd0\u884c\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u800c\u6ca1\u6709\u544a\u8bc9\u5b83\u7a0b\u5e8f\u6240\u5728\u7684\u5b8c\u6574\u8def\u5f84\u65f6<br>\u7cfb\u7edf\u9664\u4e86\u5728\u5f53\u524d\u76ee\u5f55\u4e0b\u9762\u5bfb\u627e\u6b64\u7a0b\u5e8f\u5916\uff0c\u8fd8\u4f1a\u5230path\u4e2d\u6307\u5b9a\u7684\u8def\u5f84\u53bb\u627e\u3002<\/p>\n<\/div>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-6\">1.6 \u8ba1\u7b97\u673a\u8bed\u8a00<\/h2>\n\n\n\n<p>\u8ba1\u7b97\u673a\u8bed\u8a00\uff1a<strong>\u4eba\u4e0e\u8ba1\u7b97\u673a\u4e4b\u95f4\u6c9f\u901a\u4ea4\u6d41\u7684\u65b9\u5f0f<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u673a\u5668\u8bed\u8a00<\/strong><br>\u673a\u5668\u8bed\u8a00\u5c31\u662f 0\/1 \u4ee3\u7801\uff0c\u8ba1\u7b97\u673a\u53ea\u80fd\u8bc6\u522b 0 \u548c 1 .<br>\u5728\u8ba1\u7b97\u673a\u5185\u90e8\uff0c\u65e0\u8bba\u662f\u4e00\u90e8\u7535\u5f71\u6216\u8005\u4e00\u5f20\u56fe\u7247\uff0c\u6700\u7ec8\u90fd\u662f 0\/1 \u4ee3\u7801\u3002<\/li>\n\n\n\n<li><strong>\u6c47\u7f16\u8bed\u8a00<\/strong><br>\u6c47\u7f16\u8bed\u8a00\u5c31\u662f\u5c06\u9057\u4f20\u82e6\u54c9\u7684\u673a\u5668\u8bed\u8a00\u8f6c\u5316\u4e3a\u82f1\u8bed\u5355\u8bcd<br>\u6bd4\u5982\u8bf4\uff1aadd 1,2;<\/li>\n\n\n\n<li><strong>\u9ad8\u7ea7\u8bed\u8a00<\/strong><br>\u6211\u4eec\u6240\u5b66\u5230\u7684JAVA\u5c31\u662f\u9ad8\u7ea7\u8bed\u8a00\u3002<br><code class=\"prettyprint\" >System.out.println(&quot;\u4f60\u597d\u8001\u94c1&quot;)<\/code><br>\u4f7f\u7528\u666e\u901a\u82f1\u8bed\u8fdb\u884c\u4ee3\u7801\u7f16\u5199\uff0c\u7136\u540e\u901a\u8fc7\u7f16\u8bd1\u5668\u7ffb\u8bd1\u6210\u7c7b\u4f3c\u4e8e\u6c47\u7f16\u8bed\u8a00\u7684\u6307\u4ee4\uff0c\u4e4b\u540e\u7531\u8ba1\u7b97\u673a\u6267\u884c<br><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"157\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-5-1024x157.png\" alt=\"\" class=\"wp-image-1346\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-5-1024x157.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-5-300x46.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-5-768x118.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-5.png 1229w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator aligncenter has-alpha-channel-opacity is-style-default\"\/>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-7\">\u4e8c\u3001Java\u4ecb\u7ecd\u548c\u73af\u5883\u642d\u5efa<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-8\">2.1 Java\u80cc\u666f\u4ecb\u7ecd<\/h2>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-2 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<div style=\"height:33px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>\u65e9\u671fJava\u540d\u5b57\u53eboak\uff08\u6a61\u6811\uff09\uff0c\u4f46\u662foak\u5df2\u7ecf\u5457\u5176\u4ed6\u516c\u53f8\u6ce8\u518c\u4e86<\/p>\n\n\n\n<p>\u4e4b\u540e\u6539\u540dJava\uff0c\u56e0\u4e3a\u5728\u5370\u5ea6\u5c3c\u897f\u4e9a\u7684\u722a\u6d3c\u5c9b\u76db\u4ea7\u5496\u5561\uff0c\u6545\u6b64\u8d77\u540dJava<\/p>\n\n\n\n<p>Java \u7684\u56fe\u6807\u4e5f\u662f\u5496\u5561\u7684\u6837\u5f0f<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"247\" height=\"289\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-6.png\" alt=\"\" class=\"wp-image-1362\" style=\"width:175px;height:auto\"\/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-3 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"302\" height=\"384\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-7.png\" alt=\"\" class=\"wp-image-1363\" style=\"width:256px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-7.png 302w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-7-236x300.png 236w\" sizes=\"(max-width: 302px) 100vw, 302px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p>Java\u8bed\u8a00\u662f\u7f8e\u56fd<strong>Sun<\/strong>\u516c\u53f8\uff08Stanford University Network\uff09<br>\u57281995\u5e74\u63a8\u51fa\u7684\u8ba1\u7b97\u673a\u8bed\u8a00\u3002<\/p>\n\n\n\n<p>\u540e\u88ab<strong>Oracle<\/strong>\u516c\u53f8\u6536\u8d2d<\/p>\n\n\n\n<p>Java\u4e4b\u7236\uff1a\u8a79\u59c6\u65af\u00b7\u9ad8\u65af\u6797\uff08James Gosling\uff09<\/p>\n\n\n\n<p><\/p>\n<\/div>\n<\/div>\n\n\n\n<p><strong>Java\u4e09\u5927\u5e73\u53f0<\/strong><\/p>\n\n\n\n<ul>\n<li>Java SE<br>Java\u8bed\u8a00\u7684\uff08\u6807\u51c6\u7248\uff09\uff0c\u7528\u4e8e\u684c\u9762\u5e94\u7528\u7684\u5f00\u53d1\uff0c\u662f\u5176\u4ed6\u4e24\u4e2a\u7248\u672c\u7684\u57fa\u7840\u3002<br><strong>\u684c\u9762\u5e94\u7528<\/strong>\uff1a\u7528\u6237\u53ea\u9700\u8981\u6253\u5f00\u7a0b\u5e8f\uff0c<strong>\u7a0b\u5e8f\u7684\u754c\u9762<\/strong>\u4f1a\u8ba9\u7528\u6237\u5728\u6700\u77ed\u65f6\u95f4\u5185\u627e\u5230\u4ed6\u4eec\u9700\u8981\u7684\u529f\u80fd\uff0c\u540c\u65f6\u4e3b\u52a8\u5e26\u9886\u7528\u6237\u5b8c\u6210\u4ed6\u4eec\u7684\u5de5\u4f5c\u5e76\u5f97\u5230\u6700\u597d\u7684\u4f53\u9a8c\u3002<\/li>\n\n\n\n<li>Java ME<br>Java\u8bed\u8a00\u7684\uff08\u5c0f\u578b\u7248\uff09\uff0c\u7528\u4e8e\u5d4c\u5165\u5f0f\u6d88\u8d39\u7535\u5b50\u8bbe\u5907<\/li>\n\n\n\n<li>Java EE<br>Java\u8bed\u8a00\u7684\uff08\u4f01\u4e1a\u7248\uff09\uff0c\u7528\u4e8eWeb\u65b9\u5411\u7c7b\u7f51\u7ad9\u5f00\u53d1<br><strong>\u7f51\u9875\uff1a\u7528\u4e8e\u6570\u636e\u5c55\u793a<br>\u7f51\u7ad9\uff1a\u7f51\u9875+\u540e\u53f0\u670d\u52a1\u5668<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-9\">2.2 Java\u8de8\u5e73\u53f0\u6027<\/h2>\n\n\n\n<p>\u5e73\u53f0\uff1a\u6307\u7684\u662f\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n\n\n\n<ul>\n<li>Windows<\/li>\n\n\n\n<li>MacOS<\/li>\n\n\n\n<li>Linux<\/li>\n<\/ul>\n\n\n\n<p>\u8de8\u5e73\u53f0\uff1aJava\u7a0b\u5e8f\u53ef\u4ee5\u5728<strong>\u4efb\u610f\u64cd\u4f5c\u7cfb\u7edf\u4e0a\u8fd0\u884c<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"459\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-8-1024x459.png\" alt=\"\" class=\"wp-image-1375\" style=\"width:685px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-8-1024x459.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-8-300x135.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-8-768x344.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-8.png 1135w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Java\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\uff0c\u4e0d\u770b\u64cd\u4f5c\u7cfb\u7edf\uff0c\u53ea\u770b<strong>JVM\u865a\u62df\u673a<\/strong><br>JVM\u865a\u62df\u673a\u672c\u8eab\u4e0d\u5141\u8bb8\u8de8\u5e73\u53f0\uff0c\u5141\u8bb8\u8de8\u5e73\u53f0\u7684\u662fJava\u7a0b\u5e8f<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-10\">2.3 JDK\u7684\u4e0b\u8f7d\u548c\u5b89\u88c5<\/h2>\n\n\n\n<p><strong>\u4e0b\u8f7dJDK<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"432\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-10-1024x432.png\" alt=\"\" class=\"wp-image-1379\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-10-1024x432.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-10-300x127.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-10-768x324.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-10.png 1350w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>Java\u7248\u672c\u5347\u7ea7\u56fe<\/strong><\/figcaption><\/figure>\n\n\n\n<p>JDK\u5b98\u65b9\u4e0b\u8f7d\u7f51\u7ad9\uff1a <a href=\"http:\/\/www.oracle.com\" target=\"_blank\" rel=\"noreferrer noopener\">oracle\u5b98\u7f51\u7f51\u7ad9<\/a><\/p>\n\n\n\n<p class=\"has-vivid-red-color has-text-color has-link-color has-small-font-size wp-elements-5916c6982ab7e513c9a3171a6ca09d14\">\u6ce8\u610f\uff1a\u9488\u5bf9\u4e0d\u540c\u7684\u7cfb\u7edf\uff0c\u4e0b\u8f7d\u4e0d\u540c\u7248\u672c\u7684JDK           \u5b89\u88c5JDK\u5fc5\u987b\u5b89\u88c5\u5728<strong>\u7eaf\u82f1\u6587<\/strong>\u7684\u8def\u5f84\u4e0b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-11\">2.4 \u7b2c\u4e00\u4e2aJava\u7a0b\u5e8f<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"583\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-11-1024x583.png\" alt=\"\" class=\"wp-image-1383\" style=\"width:704px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-11-1024x583.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-11-300x171.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-11-768x437.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-11.png 1036w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u7f16\u5199\u7b2c\u4e00\u4e2aJava\u7a0b\u5e8f\uff1a<\/p>\n\n\n\n<p>1\u3001\u5728\u7535\u8111\u4efb\u610f\u4f4d\u7f6e\uff0c\u65b0\u5efa\u4e00\u4e2aTXT\u6587\u672c\u6587\u6863<\/p>\n\n\n\n<p>2\u3001\u5c06\u6587\u672c\u6587\u6863\u7684\u540d\u79f0\u53ca\u540e\u7f00\u540d\u66f4\u6539\uff0cHelloWorld.java<\/p>\n\n\n\n<p>3\u3001\u5728\u91cc\u9762\u7f16\u5199Java\u4ee3\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class HelloWorld {\n\tpublic static void main(String&#091;] args){\n\t\tSystem.out.printLn(&quot;Hello World&quot;);\n\t}\n}<\/code><\/pre>\n\n\n\n<p>4\u3001\u4f7f\u7528  javac.exe  [\u7f16\u8bd1] \u4f7f\u7528   java.exe  [\u8fd0\u884c]<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Java\u5f00\u53d1\u6b65\u9aa4\uff1a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7f16\u5199 \u2192 \u7f16\u8bd1 \u2192 \u8fd0\u884c<\/mark><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-12\">2.5 HelloWorld\u6848\u4f8b\u8be6\u89e3<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class A {\n      public static void main(String&#091;] args){\n          System.out.println(&quot;Hello Java&quot;);\n      }\n}<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><code class=\"prettyprint\" >class<\/code>\u5728Java\u4e2d\u975e\u5e38\u91cd\u8981\uff0c\u88ab\u79f0\u4e3a<strong>\u7c7b<\/strong>\uff08\u4e00\u822c\u5728\u4ee3\u7801\u4e2d\u7c7bclass\u540e\u9762\u6dfb\u52a0\u7684\u662f\u6587\u4ef6\u540d\uff09<\/p>\n\n\n\n<p><code class=\"prettyprint\" >main<\/code>\u65b9\u6cd5\u53c8\u53eb\u505a<strong>\u4e3b\u65b9\u6cd5<\/strong>\uff0c\u5b83\u5c31\u662f\u6211\u4eec<strong>\u7a0b\u5e8f\u6267\u884c\u7684\u5165\u53e3<\/strong><\/p>\n\n\n\n<p><code class=\"prettyprint\" >System.out.println(&quot;Hello Java&quot;);<\/code>\u8fd9\u53e5\u88ab\u79f0\u4e3a<strong>\u6253\u5370\u8bed\u53e5<\/strong>\uff0c\u7528\u5904\u662f\u5728\u63a7\u5236\u53f0\u6253\u5370\u51fa\uff08\u201c\u201d\uff09\u4e2d\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n<p><code class=\"prettyprint\" >public<\/code><strong>\u6743\u9650\u4fee\u9970\u7b26<\/strong>\uff08\u9650\u5236\u7c7b\u540d\u79f0\u548c\u6587\u4ef6\u540d\u9700\u8981\u4fdd\u6301\u4e00\u81f4\uff09<\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-13\">2.6 HelloWorld\u5e38\u89c1\u95ee\u9898<\/h2>\n\n\n\n<p><strong>Bug<\/strong> \u539f\u610f\u662f\u866b\u5b50\u6216\u8005\u81ed\u866b\uff0c\u73b0\u5728\u6307\u7684\u662f\u7535\u8111\u7cfb\u7edf\u4e2d\u6216\u8005\u7a0b\u5e8f\u7684\u9690\u85cf\u7684\u4e00\u4e9b\u95ee\u9898\u6216\u8005\u6f0f\u6d1e<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-4 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"452\" height=\"248\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-12.png\" alt=\"\" class=\"wp-image-1410\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-12.png 452w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-12-300x165.png 300w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<blockquote class=\"wp-block-quote has-cyan-bluish-gray-color has-text-color has-link-color wp-elements-aa1b1b44080eb15b67a02ed41b80dbcb is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"has-small-font-size\"><strong>BUG\uff08\u866b\uff09\u7684\u6545\u4e8b<\/strong><br>\u5728\u65e9\u671f\u5927\u578b\u8ba1\u7b97\u673a\u65f6\u671f\uff0c\u6709\u4e00\u5929\uff0c\u6709\u4e00\u53ea\u866b\u5b50\u5361\u5728\u4e86\u8ba1\u7b97\u673a\u91cc\u9762\uff0c\u5bfc\u81f4\u8ba1\u7b97\u673a\u65e0\u6cd5\u4f7f\u7528\uff0c\u540e\u6765\u5c06\u866b\u5b50\u6e05\u7406\u51fa\u6765\u4ee5\u540e\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u4e86\u3002<br><strong>\u5230\u540e\u6765\u4eba\u4eec\u5c06\u8ba1\u7b97\u673a\u7684\u4e00\u4e9b\u9690\u85cf\u7684\u95ee\u9898\u548c\u6f0f\u6d1e\u79f0\u4e3aBUG\u3002<\/strong><\/p>\n<\/blockquote>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"398\" height=\"230\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-13.png\" alt=\"\" class=\"wp-image-1411\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-13.png 398w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-13-300x173.png 300w\" sizes=\"(max-width: 398px) 100vw, 398px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-14\">2.7 JDK\u7684\u7ec4\u6210<\/h2>\n\n\n\n<p>JDK\u4e3b\u8981\u5206\u4e3a\u4e09\u90e8\u5206 JVM\u865a\u62df\u5668  \u6838\u5fc3\u7c7b\u5e93  \u5f00\u53d1\u5de5\u5177Java Javac...<\/p>\n\n\n\n<p>JVM\u865a\u62df\u5668  \u6838\u5fc3\u7c7b\u5e93\u4e00\u822c\u88ab\u79f0\u4e3a<strong>JRE<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-15\">2.8 \u914d\u7f6e JAVA_HOME<\/h2>\n\n\n\n<p>\u6211\u4eec\u9700\u8981\u5728\u73af\u5883\u53d8\u91cf\u4e2d\u914d\u7f6eJAVA_HOME \u4f7f\u5b83\u5728\u4efb\u4f55\u5730\u65b9\u90fd\u53ef\u4ee5\u4f7f\u7528<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-16\">\u4e09\u3001IDEA\u5f00\u53d1\u5de5\u5177<\/h1>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-5 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p>IDEA\u5168\u79f0<strong> Intellij IDEA<\/strong>\uff0c\u662f\u7528\u4e8eJava\u8bed\u8a00\u5f00\u53d1\u7684\u96c6\u6210\u73af\u5883<br>\u662f\u4e1a\u754c\u516c\u8ba4\u7684\u76ee\u524d\u6700\u597d\u7528\u7684Java\u7a0b\u5e8f\u5f00\u53d1\u6700\u597d\u7684\u5de5\u5177<\/p>\n\n\n\n<blockquote class=\"wp-block-quote has-small-font-size is-layout-flow wp-block-quote-is-layout-flow\">\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-cyan-bluish-gray-color\"><strong>\u96c6\u6210\u73af\u5883<\/strong>\uff1a\u628a\u4ee3\u7801\u7f16\u5199\uff0c\u7f16\u8bd1\uff0c\u6267\u884c\uff0c\u8c03\u8bd5\u7b49\u591a\u79cd\u529f\u80fd\u7efc\u5408\u5230\u4e00\u8d77\u7684\u5f00\u53d1\u5de5\u5177<\/mark><\/p>\n<\/blockquote>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"268\" height=\"256\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-15.png\" alt=\"\" class=\"wp-image-1419\" style=\"width:163px;height:auto\"\/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-17\">3.1 IDEA\u7684\u4e0b\u8f7d\u548c\u5b89\u88c5<\/h2>\n\n\n\n<p>\u4e0b\u8f7d\uff1a<a href=\"https:\/\/www.jetbrains.com\/idea\/download\/?section=windows\">IDEA\u5b98\u7f51<\/a><\/p>\n\n\n\n<p>\u5728\u5b98\u7f51\u6709\u4e13\u4e1a\u7248\u548c\u793e\u533a\u7248\uff0c\u4e13\u4e1a\u7248\u662f\u9700\u8981\u6536\u8d39\u7684\uff0c\u793e\u533a\u7248\u662f\u5b8c\u5168\u514d\u8d39\u7684\u4f46\u662f\u4ed6\u7684\u7248\u672c\u529f\u80fd\u66f4\u5c11<\/p>\n\n\n\n<p>\u4e00\u822c\u63a8\u8350\u4e13\u4e1a\u7248\uff0c\u5177\u4f53\u4e0b\u8f7d\u5b89\u88c5\u6fc0\u6d3b\u6559\u7a0b  \u81ea\u884c\u641c\u7d22\u5373\u53ef\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-18\">3.2 IDEA\u7684\u7b2c\u4e00\u4e2a\u4ee3\u7801<\/h2>\n\n\n\n<p>IDEA\u7684\u9879\u76ee\u7ed3\u6784\uff1a<\/p>\n\n\n\n<ul>\n<li>project\uff08\u9879\u76ee\u3001\u5de5\u7a0b\uff09<\/li>\n\n\n\n<li>module\uff08\u6a21\u5757\uff09<\/li>\n\n\n\n<li>package\uff08\u5305\uff09<\/li>\n\n\n\n<li>class\uff08\u7c7b\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u524d\u4e09\u4e2a\u672c\u8d28\u5c31\u662f\u6587\u4ef6\u5939\uff0c\u7528\u4e8e\u5bf9\u6211\u4eec\u4ee3\u7801\u7684\u7ba1\u7406\u548c\u5206\u7c7b\u3002<br>\u6240\u4ee5\u8bf4<strong>\u7ed3\u6784\u7684\u5212\u5206\u662f\uff0c\u4e3a\u4e86\u66f4\u65b9\u4fbf\u7684\u7ba1\u7406\u6587\u4ef6<\/strong><\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>IDEA\u7b2c\u4e00\u4e2a\u4ee3\u7801\u7684\u521b\u5efa\u7f16\u5199\u6d41\u7a0b\uff1a<\/strong><\/p>\n\n\n\n<p>1\u3001\u521b\u5efaProject \u9879\u76ee<br>\u6253\u5f00\u6211\u4eec\u7684IDEA\uff0c\u76f4\u63a5\u70b9\u51fb\u65b0\u5efa\u9879\u76ee\u6216\u2795\u56fe\u6807\uff0c\u6211\u4eec\u7b2c\u4e00\u6b21\u9009\u62e9\u521b\u5efa\u4e00\u4e2a\u7a7a\u9879\u76ee<\/p>\n\n\n\n<p>2\u3001\u521b\u5efaModule \u6a21\u5757<br>\u7136\u540e\u5728\u6211\u4eec\u65b0\u5efa\u597d\u7684\u9879\u76ee\u4e2d\uff0c\u9879\u76ee\u7ed3\u6784\u4f4d\u7f6e\uff0c\u9009\u62e9\u6a21\u5757-\u65b0\u5efa\u6a21\u5757<\/p>\n\n\n\n<p>3\u3001\u521b\u5efaClass \u7c7b<br>\u4e4b\u540e\u5728\u6211\u4eec\u65b0\u5efa\u597d\u7684\u6a21\u5757\u7684src\u91cc\u76f4\u63a5\u521b\u5efa\u4e00\u4e2aJava\u6587\u4ef6  HelloWorld.java<\/p>\n\n\n\n<p>4\u3001\u5728\u7c7b\u4e2d\u7f16\u5199\u4ee3\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class Helloworld {\n    public static void main(String&#091;] args) {\n        System.out.println(&quot;Hello World!&quot;);\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>5\u3001\u5b8c\u6210\u7f16\u8bd1\u8fd0\u884c<br>\u76f4\u63a5\u5728\u4ee3\u7801\u7a7a\u767d\u4f4d\u7f6e\u53f3\u952e\uff0c\u9009\u62e9\u8fd0\u884cHelloWorld.java\uff0c\u7b49\u5f85\u7f16\u8bd1\u5b8c\u6210\uff0c\u770b\u5230\u63a7\u5236\u53f0\u8f93\u5165\u7684\u8bed\u53e5\u5219\u6210\u529f\u8fd0\u884c<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"614\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-17-1024x614.png\" alt=\"\" class=\"wp-image-1427\" style=\"width:839px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-17-1024x614.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-17-300x180.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-17-768x461.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-17-1536x922.png 1536w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-17-2048x1229.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-19\">3.3 IDEA\u4e2d\u7684\u64cd\u4f5c<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-20\">3.3.1 IDEA\u4e2d\u7684\u7c7b\u64cd\u4f5c<\/h3>\n\n\n\n<ul>\n<li>\u65b0\u5efa\u7c7b\u6587\u4ef6<br>\u76f4\u63a5\u5728\u9700\u8981\u7684\u76ee\u5f55\u53f3\u952e\uff0c\u65b0\u5efa\u7c7b\u5373\u53ef<\/li>\n\n\n\n<li>\u5220\u9664\u7c7b\u6587\u4ef6<br>\u5728IDEA\u4e2d\u7684\u5220\u9664\u662f\u4e0d\u8d70\u56de\u6536\u7ad9\u7684\uff0c\u5220\u9664\u7684\u64cd\u4f5c\u8981\u614e\u91cd<\/li>\n\n\n\n<li>\u4fee\u6539\u7c7b\u6587\u4ef6<br>\u4fee\u6539\u540d\u5b57\u65f6\uff0c\u7c7b\u540d\u79f0\u548c\u6587\u4ef6\u540d\u9700\u8981\u4e00\u81f4\uff0c\u53ef\u4ee5\u53f3\u952e\u4fee\u6539\u9009\u62e9\u91cd\u547d\u540d\uff0c\u7c7b\u540d\u79f0\u548c\u6587\u4ef6\u540d\u4f1a\u540c\u65f6\u4fee\u6539<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-21\">3.3.2 IDEA\u4e2d\u7684\u6a21\u5757\u64cd\u4f5c<\/h3>\n\n\n\n<ul>\n<li>\u65b0\u5efa\u6a21\u5757<br>\u5728\u9879\u76ee\u7ed3\u6784\u4f4d\u7f6e\uff0c\u9009\u62e9\u6a21\u5757\uff0c\u9009\u62e9\u65b0\u5efa\u6a21\u5757\uff0c\u4f9d\u6b21\u5b8c\u6210\u6240\u9700\u8bbe\u7f6e\u5373\u53ef\uff08\u65b0\u5efa\u6a21\u5757\u540e\u4e00\u5b9a\u70b9\u51fbOK\uff09<\/li>\n\n\n\n<li>\u5220\u9664\u6a21\u5757<br>\u5bf9\u7740\u6240\u9700\u5220\u9664\u7684\u6a21\u5757\u53f3\u952e\uff0c\u9009\u62e9\u79fb\u9664\uff08\u8fd9\u6837\u5220\u9664\u53ea\u662f\u4e34\u65f6\u7684\u5220\u9664\uff0c\u6211\u4eec\u9700\u8981\u5728\u786c\u76d8\u4e2d\u5220\u9664\uff09<\/li>\n\n\n\n<li>\u4fee\u6539\u6a21\u5757<br>\u53f3\u952e\u9009\u62e9\u91cd\u6784-\u91cd\u547d\u540d<\/li>\n\n\n\n<li>\u5bfc\u5165\u6a21\u5757<br>\u70b9\u51fb\u6587\u4ef6-\u9879\u76ee\u7ed3\u6784-\u6a21\u5757-\u5bfc\u5165\u6a21\u5757-\u9009\u62e9\u9700\u8981\u5bfc\u5165\u7684\u6a21\u5757\uff0c\u4e00\u76f4\u4e0b\u4e00\u6b65\u76f4\u5230OK\u5373\u53ef<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-22\">3.3.3 IDEA\u4e2d\u7684\u9879\u76ee\u64cd\u4f5c<\/h3>\n\n\n\n<ul>\n<li>\u5173\u95ed\u9879\u76ee<br>\u6587\u4ef6-\u5173\u95ed\u9879\u76ee<\/li>\n\n\n\n<li>\u6253\u5f00\u9879\u76ee<br>IDEA\u5e94\u7528\u521d\u59cb\u9996\u9875\uff0c\u9009\u62e9\u9879\u76ee\u6253\u5f00\u5373\u53ef<br>\u5728\u9996\u9875\u53f3\u4fa7\u7684\u9f7f\u8f6e\u53ef\u9009\u62e9\u79fb\u9664\u9879\u76ee\uff0c\u5219\u4f1a\u4e34\u65f6\u5220\u9664\u9879\u76ee<\/li>\n\n\n\n<li>\u4fee\u6539\u9879\u76ee<br>\u9879\u76ee\u7ed3\u6784-\u9879\u76ee-\u5c31\u53ef\u4ee5\u4fee\u6539\u4e00\u4e9b\u5173\u4e8e\u9879\u76ee\u7684\u8bbe\u7f6e\uff08\u540d\u5b57\uff0cSDK\uff0c\u8bed\u8a00\u7ea7\u522b\u7b49\uff09<\/li>\n\n\n\n<li>\u65b0\u5efa\u9879\u76ee<br>\u521d\u59cb\u9996\u9875\uff0c\u65b0\u5efa\u9879\u76ee\u4f9d\u6b21\u8bbe\u7f6e\u5373\u53ef<br><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-23\">\u56db\u3001Java\u57fa\u7840\u8bed\u6cd5<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-24\">4.1 \u6ce8\u91ca<\/h2>\n\n\n\n<p><strong>\u6ce8\u91ca\u5c31\u662f\u5728\u7a0b\u5e8f\u6307\u5b9a\u4f4d\u7f6e\u6dfb\u52a0\u7684\u8bf4\u660e\u6027\u4fe1\u606f<\/strong><\/p>\n\n\n\n<p>\u7b80\u5355\u6765\u8bf4\uff0c\u5c31\u662f\u5bf9\u4ee3\u7801\u7684\u4e00\u79cd\u89e3\u91ca<\/p>\n\n\n\n<ul>\n<li>\u5355\u884c\u6ce8\u91ca<br>\u683c\u5f0f\uff1a<code class=\"prettyprint\" >\/\/ \u6ce8\u91ca\u4fe1\u606f<\/code><\/li>\n\n\n\n<li>\u591a\u884c\u6ce8\u91ca<br>\u683c\u5f0f\uff1a<code class=\"prettyprint\" >\/*&lt;br&gt; \u6ce8\u91ca\u4fe1\u606f&lt;br&gt; *\/<\/code><\/li>\n\n\n\n<li>\u6587\u6863\u6ce8\u91ca<br>\u683c\u5f0f\uff1a<code class=\"prettyprint\" >\/**&lt;br&gt; \u6ce8\u91ca\u4fe1\u606f&lt;br&gt; *\/<\/code><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\/\/ \u8fd9\u662f\u4e00\u4e2ajava\u7a0b\u5e8f\npublic class Helloworld {\n\/\/ \u8fd9\u662f\u4e3b\u65b9\u6cd5\uff0c\u662f\u7a0b\u5e8f\u7684\u5165\u53e3\n    public static void main(String&#091;] args) {\n\/\/ \u8fd9\u662f\u8f93\u51fa\u8bed\u53e5\n        System.out.println(&quot;Hello World!&quot;);\n    }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-25\">4.2 \u5173\u952e\u5b57<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-6 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<p><br>        \u5173\u952e\u5b57\u5c31\u662f\u88abJava\u8d4b\u4e88\u4e86<br>        \u7279\u5b9a\u542b\u4e49\u7684\u82f1\u6587\u5355\u8bcd<\/p>\n\n\n\n<p>        Java\u7684\u5173\u952e\u5b57<br>        \u5df2\u7ecf\u88ab\u8d4b\u4e88\u4e86\u7279\u6b8a\u7684\u542b\u4e49<br>        \u8fd9\u4e9b\u5355\u8bcd\u4e0d\u5141\u8bb8\u4f7f\u7528<\/p>\n\n\n\n<p class=\"has-text-align-left\">                <strong>Java\u4e2d\u7684\u5173\u952e\u5b57<\/strong>  \u2192<\/p>\n\n\n\n<p><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"502\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-18-1024x502.png\" alt=\"\" class=\"wp-image-1445\" style=\"width:573px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-18-1024x502.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-18-300x147.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-18-768x377.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-18-1536x753.png 1536w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-18-2048x1004.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-26\">4.3 \u5b57\u9762\u91cf<\/h2>\n\n\n\n<p><strong>\u5b57\u9762\u91cf\u5c31\u662f\u6570\u636e\u5728\u7a0b\u5e8f\u5f53\u4e2d\u7684\u4e66\u5199\u683c\u5f0f<\/strong><\/p>\n\n\n\n<p><strong>Java\u4e2d\u7684\u6570\u636e\u5206\u7c7b<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table aligncenter is-style-stripes\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u5e38\u7528\u6570\u636e<\/td><td>\u751f\u6d3b\u4e2d\u7684\u5199\u6cd5<\/td><td>\u7a0b\u5e8f\u4e2d\u7684\u5199\u6cd5<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u6574\u6570<\/td><td>666\uff0c-888<\/td><td>666\uff0c-888<\/td><td>\u5199\u6cd5\u4e00\u81f4<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u5c0f\u6570<\/td><td>13.14\uff0c-5.21<\/td><td>13.14\uff0c-5.21<\/td><td>\u5199\u6cd5\u4e00\u81f4<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u5b57\u7b26\u4e32<\/td><td>\u9ed1\u9a6c\u7a0b\u5e8f\u5458<\/td><td>\"\u9ed1\u9a6c\u7a0b\u5e8f\u5458\"<\/td><td>\u53cc\u5f15\u53f7<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u5b57\u7b26<\/td><td>A\uff0c0\uff0c\u6211<\/td><td>\u2018A\u2019\uff0c\u20180\u2019\uff0c\u2018\u6211\u2019<\/td><td>\u5355\u5f15\u53f7\u4e14\u53ea\u6709\u4e00\u4e2a\u5b57\u7b26<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u5e03\u5c14\u503c<\/td><td>'\u771f'\uff0c'\u5047'<\/td><td>true\uff0cfalse<\/td><td>true\u771f\uff0cfalse\u5047<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u7a7a\u503c<\/td><td><\/td><td>null<\/td><td>\u4e00\u4e2a\u7279\u6b8a\u7684\u503c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-27\">4.4 \u53d8\u91cf<\/h2>\n\n\n\n<p>\u53d8\u91cf\u5c31\u662f\u5185\u5b58\u4e2d\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u7a7a\u95f4\u4e2d<strong>\u5b58\u50a8\u7740\u7ecf\u5e38\u53d1\u751f\u6539\u53d8\u7684\u6570\u636e<\/strong><\/p>\n\n\n\n<p><strong>\u53d8\u91cf\u7684\u5b9a\u4e49\u683c\u5f0f\uff1a<\/strong><br>\u6570\u636e\u7c7b\u578b  \u53d8\u91cf\u540d = \u6570\u636e\u503c\uff1b<br>\u4f8b\uff1a <code class=\"prettyprint\" >int salary = 15000;<\/code><\/p>\n\n\n\n<p><strong>\u53d8\u91cf\u7684\u4f7f\u7528\u65b9\u6cd5\uff1a<\/strong><br>\u6839\u636e\u53d8\u91cf\u540d\u8fdb\u884c\u4f7f\u7528<br>\u4f8b\uff1a<code class=\"prettyprint\" >System.out.printLn(age);<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-28\">4.5 Debug\u5de5\u5177<\/h2>\n\n\n\n<p><strong>Debug<\/strong>\u662f\u63d0\u4f9b\u7ed9\u7a0b\u5e8f\u5458\u4f7f\u7528\u7684<strong>\u7a0b\u5e8f\u8c03\u8bd5\u5de5\u5177<\/strong><br>\u5b83\u53ef\u4ee5\u7528\u4e8e<strong>\u67e5\u770b\u7a0b\u5e8f<\/strong>\u7684<strong>\u6267\u884c\u6d41\u7a0b<\/strong>\uff0c\u4e5f\u53ef\u4ee5\u7528\u4e8e\u8ffd\u8e2a\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u6765<strong>\u8c03\u8bd5\u7a0b\u5e8f<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<p><strong>Debug\u4f7f\u7528\u65b9\u6cd5\uff1a<\/strong><\/p>\n\n\n\n<p>\u5f00\u542fDebug\u8c03\u8bd5\u6a21\u5f0f\uff1a<br>\u5728\u4ee3\u7801\u7a7a\u767d\u53f3\u952e\uff0c\u9009\u62e9\u8c03\u8bd5\u8fd0\u884c<\/p>\n\n\n\n<p>\u6253\u65ad\u70b9\u65b9\u5f0f\uff1a<br>\u5728\u4ee3\u7801\u5de6\u8fb9\u6570\u5b57\u533a\u57df\u70b9\u51fb\u4e00\u4e0b\uff0c\u51fa\u73b0\u5c0f\u7ea2\u70b9\uff0c\u5219\u6210\u529f\u521b\u5efa\u65ad\u70b9\u3002<\/p>\n\n\n\n<p>\u5f53\u7a0b\u5e8f\u8fd0\u884c\u5230\u65ad\u70b9\u4f4d\u7f6e\uff0c\u5219\u4f1a\u505c\u6b62\uff0c\u7b49\u5f85\u4e0b\u4e00\u6b65\u6307\u793a<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"669\" height=\"617\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-20.png\" alt=\"\" class=\"wp-image-1456\" style=\"width:317px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-20.png 669w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-20-300x277.png 300w\" sizes=\"(max-width: 669px) 100vw, 669px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-29\">4.6 \u6807\u8bc6\u7b26<\/h2>\n\n\n\n<p><strong>\u6807\u8bc6\u7b26\u5c31\u662f\u7ed9\u7c7b\u3001\u65b9\u6cd5\u3001\u53d8\u91cf\u8d77\u540d\u5b57\u7684\u7b26\u53f7<\/strong><\/p>\n\n\n\n<p><strong>\u6807\u8bc6\u7b26\u547d\u540d\u89c4\u5219<\/strong><\/p>\n\n\n\n<ul>\n<li>\u7531<strong>\u6570\u5b57<\/strong>\u3001<strong>\u5b57\u6bcd<\/strong>\u3001<strong>\u4e0b\u5212\u7ebf<\/strong> <code class=\"prettyprint\" >_<\/code> \u3001<strong>\u7f8e\u5143\u7b26<\/strong> <code class=\"prettyprint\" >$<\/code> \u7ec4\u6210<\/li>\n\n\n\n<li>\u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934<\/li>\n\n\n\n<li>\u4e0d\u80fd\u662f\u5173\u952e\u5b57<\/li>\n\n\n\n<li>\u533a\u5206\u5927\u5c0f\u5199<\/li>\n<\/ul>\n\n\n\n<p><strong>\u6807\u8bc6\u7b26\u547d\u540d\u89c4\u8303<\/strong><\/p>\n\n\n\n<p><strong>\u5c0f\u9a7c\u5cf0\u547d\u540d\u6cd5\uff1a<\/strong><br>\u7528\u4e8e\u7ed9<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u53d8\u91cf<\/mark><\/strong>\u8d77\u540d<\/p>\n\n\n\n<ul>\n<li>\u6807\u8bc6\u7b26\u662f\u4e00\u4e2a\u5355\u8bcd\u7684\u65f6\u5019\uff0c\u6240\u6709\u5b57\u6bcd\u5c0f\u5199<br>\u4f8b\uff1a<code class=\"prettyprint\" >name<\/code><\/li>\n\n\n\n<li>\u6807\u8bc6\u7b26\u6709\u591a\u4e2a\u5355\u8bcd\u7ec4\u6210\u65f6\uff0c\u4ece\u7b2c\u4e8c\u4e2a\u5355\u8bcd\u5f00\u59cb\u9996\u5b57\u6bcd\u5927\u5199<br>\u4f8b\uff1a<code class=\"prettyprint\" >firstName<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>\u5927\u9a7c\u5cf0\u547d\u540d\u6cd5\uff1a<\/strong><br>\u7528\u4e8e\u7ed9<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u7c7b<\/strong><\/mark>\u8d77\u540d<\/p>\n\n\n\n<ul>\n<li>\u6807\u8bc6\u7b26\u662f\u4e00\u4e2a\u5355\u8bcd\u7684\u65f6\u5019\uff0c\u9996\u5b57\u6bcd\u5927\u5199<br>\u4f8b\uff1a<code class=\"prettyprint\" >Student<\/code><\/li>\n\n\n\n<li>\u6807\u8bc6\u7b26\u7531\u591a\u4e2a\u5355\u8bcd\u7ec4\u6210\u7684\u65f6\u5019\uff0c\u6bcf\u4e2a\u5355\u8bcd\u7684\u9996\u5b57\u6bcd\u5927\u5199<br>\u4f8b\uff1a<code class=\"prettyprint\" >GoodStudent<\/code><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-30\">4.7 \u6570\u636e\u7c7b\u578b<\/h2>\n\n\n\n<p>\u6570\u636e\u7c7b\u578b\u4ecb\u7ecd\uff1a<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/mark><\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>\u6570\u636e\u7c7b\u578b<\/td><td>\u5173\u952e\u5b57<\/td><td>\u5185\u5b58\u5360\u7528<\/td><td>\u53d6\u503c\u8303\u56f4<\/td><\/tr><tr><td>\u6574\u6570<\/td><td>byte<\/td><td>1<\/td><td>-128~127<\/td><\/tr><tr><td>\u6574\u6570<\/td><td>short<\/td><td>2<\/td><td>-32768~32767<\/td><\/tr><tr><td>\u6574\u6570<\/td><td>int<\/td><td>4<\/td><td>-2147483648~2147483647<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">(10\u4f4d\u6570)<\/mark><\/td><\/tr><tr><td>\u6574\u6570<\/td><td>long<\/td><td>8<\/td><td>-9223372036854775808~9223372036854775807<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">(19\u4f4d\u6570)<\/mark><\/td><\/tr><tr><td>\u6d6e\u70b9\u6570<\/td><td>float<\/td><td>4<\/td><td>1.401298e-45~3.402823e+38<\/td><\/tr><tr><td>\u6d6e\u70b9\u6570<\/td><td>double<\/td><td>8<\/td><td>4.9000000e-324~1.797693e+308<\/td><\/tr><tr><td>\u5b57\u7b26<\/td><td>char<\/td><td>2<\/td><td>0~65535<\/td><\/tr><tr><td>\u5e03\u5c14<\/td><td>boolean<\/td><td>1<\/td><td>true,false<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\"><em>\u8bf4\u660e\uff1ae+38\u8868\u793a\u662f\u4e58\u4ee510\u768438\u6b21\u65b9\uff0c<br>\u540c\u6837\uff0ce-45\u8868\u793a\u4e58\u4ee510\u7684\u8d1f45\u6b21\u65b9<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"470\" height=\"531\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-21.png\" alt=\"\" class=\"wp-image-1466\" style=\"width:400px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-21.png 470w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-21-266x300.png 266w\" sizes=\"(max-width: 470px) 100vw, 470px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>\u4e0d\u540c\u6570\u636e\u7c7b\u578b\u53d6\u503c\u8303\u56f4\u4e0d\u4e00\u6837\uff0c\u5185\u5b58\u5360\u7528\u5927\u5c0f\u4e5f\u4e0d\u4e00\u6837 <\/p>\n\n\n\n<p><strong>\u6574\u6570\u7c7b\u578b\u9996\u9009int\uff0c\u57fa\u672c\u5e38\u89c4\u6570\u636e\u5728int\u90fd\u80fd\u88c5\u5f97\u4e0b<\/strong><\/p>\n\n\n\n<p><strong>\u5c0f\u6570\u7c7b\u578b\u9996\u9009double<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"755\" height=\"355\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-23.png\" alt=\"\" class=\"wp-image-1479\" style=\"width:564px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-23.png 755w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-23-300x141.png 300w\" sizes=\"(max-width: 755px) 100vw, 755px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-31\">4.8 \u952e\u76d8\u5f55\u5165<\/h2>\n\n\n\n<p>\u952e\u76d8\u5f55\u5165\u6548\u679c\u4ecb\u7ecd\uff1a<br>\u7528\u6237\u53ef\u4ee5\u81ea\u884c\u5f55\u5165\u6570\u636e\uff0c\u53d8\u91cf\u8bb0\u5f55\u7684\u503c\u6765\u81ea\u7528\u6237\u81ea\u884c\u8bbe\u7f6e<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u952e\u76d8\u5f55\u5165\u6b65\u9aa4\uff1a<\/strong><\/p>\n\n\n\n<p>1\u3001Java\u7a0b\u5e8f\u5185\u7f6e\u4e86\u4e00\u4e2aScanner\uff0c<strong>\u5bfc\u5165\u8f6f\u4ef6\u5305<\/strong><\/p>\n\n\n\n<p>\u5728<code class=\"prettyprint\" >class<\/code>\u4e0a\u9762\u4e66\u5199 <code class=\"prettyprint\" >import java.util.Scanner<\/code> \u610f\u601d\u662f\u5bfc\u5165Java\/util\/Scanner\u6587\u4ef6<\/p>\n\n\n\n<p>2\u3001<strong>\u521b\u5efa\u5bf9\u8c61<\/strong><\/p>\n\n\n\n<p>\u5728\u4e3b\u65b9\u6cd5\u4e2d\u4e66\u5199 <code class=\"prettyprint\" >Scanner sc = new Scanner(System.in);<\/code> \u610f\u601d\u662f\u5199\u4e86\u4e00\u4e2a\u5e26\u53c2\u6784\u9020\u65b9\u6cd5\uff0c\u521b\u5efa\u5bf9\u8c61<\/p>\n\n\n\n<p>3\u3001\u8c03\u7528\u65b9\u6cd5<\/p>\n\n\n\n<p><code class=\"prettyprint\" >int age = sc.nextInt();<\/code>\u8fd9\u6837\u610f\u601d\u662f\uff0c\u63a5\u6536\u4e00\u4e2a\u8f93\u5165\u7684\u6574\u6570\uff0c\u5e76\u4e14\u5b58\u5230<code class=\"prettyprint\" >age<\/code>\u4e2d<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-32\">\u4e94 \u8fd0\u7b97\u7b26<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-33\">5.1 \u7b97\u6570\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<ul>\n<li>\u8fd0\u7b97\u7b26\uff1a\u5bf9\u5b57\u9762\u91cf\u6216\u53d8\u91cf\u8fdb\u884c\u64cd\u4f5c\u7684\u7b26\u53f7<\/li>\n\n\n\n<li>\u8868\u8fbe\u5f0f\uff1a\u7528\u8fd0\u7b97\u7b26\u88ab\u5b57\u9762\u91cf\u6216\u53d8\u91cf\u8fde\u63a5\u8d77\u6765\uff0c\u7b26\u5408Java\u8bed\u6cd5\u7684\u5f0f\u5b50\u79f0\u4e3a\u8868\u8fbe\u5f0f<br>\u4e0d\u540c\u8fd0\u7b97\u7b26\u8fde\u63a5\u5f97\u8868\u8fbe\u5f0f\uff0c\u4f53\u73b0\u7684\u662f\u4e0d\u540c\u7684\u7c7b\u578b\u5f97\u8868\u8fbe\u5f0f<\/li>\n\n\n\n<li>\u4f8b\uff1a<code class=\"prettyprint\" >int c = a + b<\/code> \u5176\u4e2d<code class=\"prettyprint\" > + <\/code>\u4e3a\u8fd0\u7b97\u7b26\uff0c<code class=\"prettyprint\" >a + b<\/code>\u662f\u8868\u8fbe\u5f0f<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>\u7b26\u53f7<\/td><td>\u4f5c\u7528<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>+<\/td><td>\u52a0<\/td><td><\/td><\/tr><tr><td>-<\/td><td>\u51cf<\/td><td><\/td><\/tr><tr><td>*<\/td><td>\u4e58<\/td><td><\/td><\/tr><tr><td>\/<\/td><td>\u9664<\/td><td><\/td><\/tr><tr><td>%<\/td><td>\u53d6\u4f59<\/td><td>\u83b7\u53d6\u4e24\u4e2a\u6570\u636e\u505a\u9664\u6cd5\u5f97\u4f59\u6570<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-34\">5.2 \u5b57\u7b26\u4e32\u62fc\u63a5\u64cd\u4f5c<\/h2>\n\n\n\n<p>\u5f53<code class=\"prettyprint\" > + <\/code>\u64cd\u4f5c\u4e2d\uff0c\u9047\u5230\u4e86\u5b57\u7b26\u4e32\uff0c\u8fd9\u65f6<code class=\"prettyprint\" > + <\/code><strong>\u5b57\u7b26\u4e32\u62fc\u63a5\u7b26<\/strong>\uff0c\u800c\u4e0d\u662f\u7b97\u6570\u8fd0\u7b97\u7b26<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class Test {\n    public static void main(String&#091;] args){\n        System.out.println(&quot;\u5e74\u9f84\u662f&quot; + 18)\n        \/\/ \u8f93\u51fa\u4e3a  &quot;\u5e74\u9f84\u662f18&quot;\n        System.out.println(1 + 99 + &quot;\u7b49\u4e8e&quot; + 1 + 1)\n        \/\/ \u8f93\u51fa\u4e3a  &quot;100\u7b49\u4e8e11&quot;\n        \/\/ \u56e0\u4e3a\u4ee3\u7801\u6709\u6267\u884c\u987a\u5e8f\uff0c\u524d\u9762\u90fd\u662f\u8fd0\u7b97\u7b26\uff0c\u9047\u5230\u4e86\u5b57\u7b26\u4e32\u624d\u53d8\u4e3a\u62fc\u63a5\u7b26\n        \/\/ \u6240\u4ee5\u524d\u97621 + 99 = 100\uff0c\u540e\u97621 + 1 = 11\n        System.out.println(&quot;5+5=&quot;+(5+5))\n        \/\/ \u8f93\u51fa\u4e3a&quot;5+5=10&quot;\n        \/\/ \u548c\u6570\u5b66\u8fd0\u7b97\u4e00\u6837\uff0c\u6dfb\u52a0\u62ec\u53f7\u56de\u589e\u52a0\u6743\u91cd\uff08\u5219\u5148\u7b97\u62ec\u53f7\u91cc\u9762\u7684\uff09\uff0c\n        \/\/ \u6240\u4ee5\uff0c\u5148\u8fd0\u7b97\u4e86\uff085+5\uff09\uff0c\u5f97\u6570\u662f10\uff0c\u7136\u540e\u548c&quot;5+5=&quot;\u62fc\u63a5\uff0c\u7ed3\u679c\u4e3a\u5b57\u7b26\u4e32&quot;5+5=10&quot;\n    }\n}<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"has-small-font-size\"><strong>\u56e0\u4e3a\u4ee3\u7801\u6709\u6267\u884c\u987a\u5e8f\uff0c\u524d\u9762\u90fd\u662f\u8fd0\u7b97\u7b26\uff0c\u9047\u5230\u4e86\u5b57\u7b26\u4e32\u53d8\u4e3a\u62fc\u63a5\u7b26<\/strong><\/p>\n\n\n\n<p class=\"has-small-font-size\"><strong>\u5728\u8fd0\u7b97\u7b26\u4ee3\u7801\u4e2d\u6dfb\u52a0\u62ec\u53f7\uff0c\u53ef\u4ee5\u4e3a\u62ec\u53f7\u91cc\u7684\u8fd0\u7b97\u6dfb\u52a0\u6743\u91cd\uff0c\u7136\u540e\u518d\u5c06\u62ec\u53f7\u5916\u9762\u7684\uff0c\u8fdb\u884c\u6b63\u5e38\u8fd0\u7b97<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-35\">5.3 \u81ea\u589e\u81ea\u51cf\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u7b26\u53f7<\/td><td>\u4f5c\u7528<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>++<\/td><td>\u81ea\u589e<\/td><td>\u53d8\u91cf\u81ea\u8eab\u7684\u503c\u52a0\u4e00<\/td><\/tr><tr><td>--<\/td><td>\u81ea\u51cf<\/td><td>\u53d8\u91cf\u81ea\u8eab\u7684\u503c\u51cf\u4e00<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u81ea\u589e\u81ea\u51cf\u7684\u7528\u6cd5\uff1a<\/strong><\/p>\n\n\n\n<p>1\u3001\u5355\u72ec\u4f7f\u7528\uff0c\u5728\u4ee3\u7801\u4e2d\u76f4\u63a5\u6dfb\u52a0++\u3001--<br>\u5728\u53d8\u91cf\u524d\u9762\u6dfb\u52a0\u6216\u5728\u53d8\u91cf\u540e\u9762\u6dfb\u52a0\uff0c\u662f\u6ca1\u6709\u533a\u522b\u7684<br>\u4f8b\uff1a<code class=\"prettyprint\" >a++<\/code>    <code class=\"prettyprint\" >--a<\/code><\/p>\n\n\n\n<p>2\u3001\u53c2\u4e0e\u8fd0\u7b97\u4f7f\u7528\uff1a<br>++\u5728\u524d\uff1a\u5148\u81ea\u589e\uff0c\u518d\u64cd\u4f5c<br>++\u5728\u540e\uff1a\u5148\u64cd\u4f5c\uff0c\u518d\u81ea\u589e<br>\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class Test{\n    public static void main(String&#091;] args){\n        int a = 10;\n        int b = ++a;\n        System.out.println(&quot;a=&quot; + a &quot;b=&quot; + b)\n        \/\/ ++\u5728\u524d\uff0ca\u5148\u52a01\uff0c\u7136\u540e\u8d4b\u503c\u7ed9b\uff0c\u6240\u4ee5 a = 11, b = 11\n\/\/ \u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\n        int a = 10;\n        int b = a++;\n        System.out.println(&quot;a=&quot; + a &quot;b=&quot; + b)\n        \/\/ ++\u5728\u540e\uff0ca\u5148\u8d4b\u503c\u7ed9b\uff0c\u7136\u540ea\u518d\u52a01\uff0c\u6240\u4ee5 a = 11, b = 10\n    }\n}<\/code><\/pre>\n\n\n\n<p>3\u3001<code class=\"prettyprint\" >++<\/code>\u3001<code class=\"prettyprint\" >--<\/code> <strong>\u53ea\u80fd\u64cd\u4f5c\u53d8\u91cf\uff0c\u4e0d\u80fd\u64cd\u4f5c\u5e38\u91cf<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-36\">5.4 \u7c7b\u578b\u8f6c\u6362<\/h2>\n\n\n\n<p>\u7c7b\u578b\u8f6c\u6362\u5206\u7c7b\uff1a<\/p>\n\n\n\n<p><strong>\u9690\u5f0f\u8f6c\u6362\uff1a<\/strong><br>1\u3001\u628a\u4e00\u4e2a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u53d6\u503c\u8303\u56f4\u5c0f<\/mark><\/strong>\u7684\u6570\u503c\u6216\u53d8\u91cf\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u8d4b\u503c<\/mark><\/strong>\u7ed9\u53e6\u4e00\u4e2a<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u53d6\u503c\u8303\u56f4\u5927<\/strong><\/mark>\u7684\u53d8\u91cf<br><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">2\u3001\u53d6\u503c\u8303\u56f4\u5c0f<\/mark><\/strong>\u7684\u6570\u636e\u548c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u53d6\u503c\u8303\u56f4\u5927<\/mark><\/strong>\u7684\u6570\u636e\u8fdb\u884c\u8fd0\u7b97\u65f6\uff0c\u5c0f\u7684\u4f1a<strong>\u63d0\u5347<\/strong>\u4e3a\u5927\u7684\u4e4b\u540e\uff0c\u5728\u8fdb\u884c\u8fd0\u7b97<br><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">3\u3001\u5728Java\u4e2d\u6570\u636e\u7c7b\u578b\u4e0d\u7edf\u4e00\uff0c\u6ca1\u6cd5\u76f4\u63a5\u8fdb\u884c\u8fd0\u7b97<\/mark><\/strong><br>\uff08<code class=\"prettyprint\" >byte<\/code> <code class=\"prettyprint\" >short<\/code> <code class=\"prettyprint\" >char<\/code> \u4e09\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u5728\u8fd0\u7b97\u65f6\u90fd\u4f1a<strong>\u63d0\u5347<\/strong>\u4e3a<code class=\"prettyprint\" >int<\/code>\uff0c\u518d\u8fdb\u884c\u8fd0\u7b97\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class Test{\n    public static void main(String&#091;] args){\n        int a = 10;\n        double b = a;\n        System.out.printLn(b);\n        \/\/ double\u53d6\u503c\u8303\u56f4\u6bd4int\u5927\uff0c\u6240\u4ee5\u53ef\u4ee5\u76f4\u63a5\u8d4b\u503c\uff0c\u8f93\u51fa\u4e3a10.0\uff0c\u5c06\u4ed6\u8f6c\u6362\u6210\u4e86double\u7c7b\u578b\n        \/\/ \u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\n        int a = 10;\n        double b = 12.3;\n        System.out.printLn(a+b);\n        \/\/ int\u7c7b\u578b\u548cdouble\u7c7b\u578b\u8fdb\u884c\u8fd0\u7b97\uff0c\u5148\u5c06int\u63d0\u5347\u4e3adouble\u4e4b\u540e\u518d\u8fdb\u884c\u8fd0\u7b97\uff0c\u8f93\u51fa\u4e3a22.3\n    }\n}<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"220\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-24-1024x220.png\" alt=\"\" class=\"wp-image-1509\" style=\"width:712px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-24-1024x220.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-24-300x65.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-24-768x165.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-24.png 1172w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>\u5f3a\u5236\u8f6c\u6362\uff1a<\/strong><br>\u628a\u4e00\u4e2a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u53d6\u503c\u8303\u56f4\u5927<\/mark><\/strong>\u7684\u6570\u503c\u6216\u8005\u53d8\u91cf\uff0c\u8d4b\u503c\u7ed9\u53e6\u4e00\u4e2a<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u53d6\u503c\u8303\u56f4\u5c0f<\/strong><\/mark>\u7684\u53d8\u91cf<br>\u4e0d\u5141\u8bb8\u76f4\u63a5\u590d\u5236\uff0c\u9700\u8981\u52a0\u5165\u5f3a\u5236\u8f6c\u6362<br>\u683c\u5f0f\uff1a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><code class=\"prettyprint\" >\u76ee\u6807\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d = \uff08\u76ee\u6807\u6570\u636e\u7c7b\u578b\uff09\u88ab\u5f3a\u5236\u7684\u6570\u636e\uff1b<\/code><\/mark><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class Test {\n    public static void main(String&#091;] args) {\n        double a = 12.3;\n        int b = (int) a;\n        System.out.println(b);\n        \/\/ \u8f93\u51fa\u4e3a12\uff0c\u5c11\u4e860.3\uff0c\u8fd9\u4e2a\u79f0\u4e3a\u7cbe\u5ea6\u7f3a\u5931\n        \/\/ \u5f3a\u5236\u8f6c\u6362\uff0c\u3010\u6709\u53ef\u80fd\u3011\u51fa\u73b0\u7cbe\u5ea6\u7f3a\u5931\u7684\u60c5\u51b5\n    }\n}<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u5728\u4ee3\u7801\u4e2d\u8fdb\u5236\u7684\u5206\u7c7b\u53ca\u4e66\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class Test {\n    public static void main(String&#091;] args){\n        \/*\n            \u8ba1\u7b97\u673a\u4e2d\u7684\u8fdb\u5236\u5206\u7c7b\u53ca\u5199\u6cd5\uff1a\n            \u5341\u8fdb\u5236\uff1a\u9ed8\u8ba4\u5199\u6cd5\n            \u4e8c\u8fdb\u5236\uff1a0b\u5f00\u5934\u4e66\u5199\n            \u516b\u8fdb\u5236\uff1a0\u5f00\u5934\u4e66\u5199\n            \u5341\u516d\u8fdb\u5236\uff1a0x\u5f00\u5934\u4e66\u5199\n        *\/\n        System.out.println(110);\n        System.out.println(0b110);\n        System.out.println(0110);\n        System.out.println(0x110);\n        \/\/ \u4f9d\u6b21\u8f93\u51fa\u4e3a  110\u30016\u300172\u3001272\uff0c\u4f9d\u6b21\u4ee3\u8868\u7684\u662f\u5341\u8fdb\u5236\uff0c\u4e8c\u8fdb\u5236\uff0c\u516b\u8fdb\u5236\uff0c\u5341\u516d\u8fdb\u5236\u7684110\u7684\u503c\n    }\n}<\/code><\/pre>\n\n\n\n<p>Java\u62e5\u6709\u4e00\u4e2a\u673a\u5236\uff1a<strong>\u5e38\u91cf\u4f18\u5316\u673a\u5236<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >byte b1 = 3\nbyte b2 = 4\nbyte b3 = b1 + b2\n\/\/ \u8fd9\u4e2a\u8fd0\u7b97\u4f1a\u62a5\u9519\n\/\/ \u56e0\u4e3ab1\u548cb2\u662f\u4e24\u4e2abyte\u7c7b\u578b\uff0c\u5728\u8fd0\u7b97\u7684\u65f6\u5019\uff0c\u4f1a\u63d0\u5347\u4e3aint\u7c7b\u578b\n\/\/ \u63d0\u5347\u4e4b\u540e\uff0c\u5c31\u662f\u4e24\u4e2aint\u5728\u8fd0\u7b97\u4e86\uff0c\u8fd0\u7b97\u7684\u7ed3\u679c\u8fd8\u662fint.\n\/\/ \u5c06int\u7c7b\u578b\u7684\u7ed3\u679c\uff0c\u8d4b\u503c\u7ed9byte\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u5c5e\u4e8e\u5927\u7ed9\u5c0f\uff0c\u4e0d\u80fd\u76f4\u63a5\u7ed9.\nbyte b = 3 + 4\n\/\/ \u8fd9\u4e2a\u8fd0\u7b97\u4e0d\u4f1a\u62a5\u9519\uff0c\u56e0\u4e3aJava\u4e2d\u6709\u4e00\u4e2a\u673a\u5236\u53eb\u505a\u5e38\u91cf\u4f18\u5316\u673a\u5236<\/code><\/pre>\n\n\n\n<p>\u5728\u7f16\u8bd1\u7684\u65f6\u5019\uff0c\u4f1a\u5c06\u4e24\u4e2a\u5b57\u9762\u91cf\uff08<code class=\"prettyprint\" >3\u30014<\/code>\uff09\u8fdb\u884c\u8fd0\u7b97\uff0c\u5f97\u51fa\u7ed3\u679c7\uff0c\u518d\u53bb\u8f6c\u6362 \u5b57\u8282\u7801 <code class=\"prettyprint\" >byte<\/code><br>\u6211\u4eec\u4ea7\u751f\u7684\u5b57\u8282\u7801\u6587\u4ef6\u4e2d <code class=\"prettyprint\" >byte b = 7;<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-37\">5.5 package<\/h2>\n\n\n\n<p>\u6211\u4eec\u5982\u679c\u76f4\u63a5\u5728src\u6587\u4ef6\u5939\u4e0b\u521b\u5efaJava\u6587\u4ef6\uff0c\u4f1a\u5bfc\u81f4\u6587\u4ef6\u4e0d\u597d\u627e\uff0c\u6ca1\u6709\u5206\u7c7b\uff0c\u4e71\u4e03\u516b\u7cdf\u7684\u60c5\u51b5<\/p>\n\n\n\n<p>\u6240\u4ee5\u6211\u4eec\u8981\u7528\u5230<strong>\u5305\u7ba1\u7406\u6a21\u5f0f<\/strong> package<\/p>\n\n\n\n<p>\u4e00\u822c\u5305\u7684\u547d\u540d\u5c31\u662f\u516c\u53f8\u7684\u7f51\u5740\uff0c\u5012\u7740\u5199+\u9879\u76ee\u540d\u79f0  \u4f8b\uff1a<br><code class=\"prettyprint\" >top.ericw.test<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-38\">5.6 \u8d4b\u503c\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>\u7b26\u53f7<\/td><td>\u4f5c\u7528<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>=<\/td><td>\u8d4b\u503c<\/td><td>a=10,\u5c0610\u8d4b\u503c\u7ed9a<\/td><\/tr><tr><td>+=<\/td><td>\u52a0\u540e\u8d4b\u503c<\/td><td>a+=b\uff0c\u5c06a<strong>+<\/strong>b\u7684\u503c\u7ed9a<\/td><\/tr><tr><td>-=<\/td><td>\u51cf\u540e\u8d4b\u503c<\/td><td>a+=b\uff0c\u5c06a-b\u7684\u503c\u7ed9a<\/td><\/tr><tr><td>*=<\/td><td>\u4e58\u540e\u8d4b\u503c<\/td><td>a+=b\uff0c\u5c06a*b\u7684\u503c\u7ed9a<\/td><\/tr><tr><td>\/=<\/td><td>\u9664\u540e\u8d4b\u503c<\/td><td>a+=b\uff0c\u5c06a\/b\u7684\u5546\u7ed9a<\/td><\/tr><tr><td>%=<\/td><td>\u53d6\u4f59\u540e\u8d4b\u503c<\/td><td>a+=b\uff0c\u5c06a%b\u7684\u4f59\u6570\u7ed9a<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class OperatorDemo1 {\n    \/\/ \u8d4b\u503c\u8fd0\u7b97\u7b26\n    public static void main(String&#091;] args) {\n        int a = 10;\n        a += 10;\n        System.out.println(a);\n        \/\/ 20\n        \n        int b = 10;\n        b -= 10;\n        System.out.println(b);\n        \/\/ 0\n        \n        int c = 10;\n        c *= 10;\n        System.out.println(c);\n        \/\/ 100\n        \n        int d = 10;\n        d \/= 10;\n        System.out.println(d);\n        \/\/ 1\n        \n        int e = 10;\n        e %= 10;\n        System.out.println(e);\n        \/\/0\n    }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-39\">5.7 \u5173\u7cfb\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<p>\u5173\u7cfb\u8fd0\u7b97\u7b26\uff0c\u53c8\u79f0\u4e3a\u6bd4\u8f83\u8fd0\u7b97\u7b26\u53f7<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u7b26\u53f7<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>==<\/td><td>a==b,\u5224\u65ada\u548cb\u662f\u5426\u76f8\u7b49<\/td><\/tr><tr><td>!=<\/td><td>a!=b,\u5224\u65ada\u548cb\u662f\u5426\u4e0d\u76f8\u7b49<\/td><\/tr><tr><td>&gt;<\/td><td>a&gt;b,\u5224\u65ada\u662f\u5426\u5927\u4e8eb<\/td><\/tr><tr><td>&gt;=<\/td><td>a&gt;=b,\u5224\u65ada\u662f\u5426\u5927\u4e8e\u7b49\u4e8eb<\/td><\/tr><tr><td>&lt;<\/td><td>a&lt;b,\u5224\u65ada\u662f\u5426\u5c0f\u4e8eb<\/td><\/tr><tr><td>&lt;=<\/td><td>a&lt;=b,\u5224\u65ada\u662f\u5426\u5c0f\u4e8e\u7b49\u4e8eb<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-green-cyan-color\">\u6210\u7acb\u4e3ature\uff0c\u4e0d\u6210\u7acb\u4e3afalse<\/mark><\/strong><\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-40\">5.8 \u903b\u8f91\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u7b26\u53f7<\/td><td>\u4ecb\u7ecd<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>&amp;<\/td><td>\u903b\u8f91\u4e0e<\/td><td>\u9047false\u5219false<\/td><\/tr><tr><td>|<\/td><td>\u903b\u8f91\u6216<\/td><td>\u9047true\u5219true<\/td><\/tr><tr><td>!<\/td><td>\u903b\u8f91\u975e<\/td><td>\u53d6\u53cd<\/td><\/tr><tr><td>^<\/td><td>\u903b\u8f91\u5f02\u6216<\/td><td>\u76f8\u540c\u4e3afalse\uff0c\u4e0d\u540c\u4e3atrue<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u77ed\u8def\u903b\u8f91\u8fd0\u7b97\u7b26<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u7b26\u53f7<\/td><td>\u4ecb\u7ecd<\/td><td>\u8bf4\u660e<\/td><\/tr><tr><td>&amp;&amp;<\/td><td>\u53cc\u4e0e<\/td><td>\u5f53\u5de6\u8fb9\u4e3afalse\u65f6\uff0c\u53f3\u8fb9\u4e0d\u6267\u884c<\/td><\/tr><tr><td>||<\/td><td>\u53cc\u6216<\/td><td>\u5f53\u5de6\u8fb9\u4e3ature\u65f6\uff0c\u53f3\u8fb9\u4e0d\u6267\u884c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class OperatorDemo4 {\n    public static void main(String&#091;] args) {\n        int x = 3;\n        int y = 4;\n        boolean result = ++x &gt; 5 &amp;&amp; y-- &lt; 4;\n        System.out.println(x);\n        System.out.println(y);\n        System.out.println(result);\n\/\/      \u8f93\u51fa\u4e3a x = 4, y = 4 , result = false\n\/\/      y--\u6ca1\u6709\u6267\u884c\uff0c\u662f\u56e0\u4e3a&amp;&amp;\u7684\u77ed\u8def\u6548\u679c\uff08\u5f53\u5de6\u8fb9\u4e3afalse\u65f6\uff0c\u53f3\u8fb9\u5c31\u4e0d\u6267\u884c\u4e86\uff09\n\/\/      &amp; \u6ca1\u6709\u77ed\u8def\u6548\u679c  | \u6ca1\u6709\u77ed\u8def\u6548\u679c\uff0c||\u5f53\u5de6\u8fb9\u4e3atrue\u65f6\uff0c\u53f3\u8fb9\u4e0d\u6267\u884c\n\/\/      &amp;&amp;\uff0c||\uff0c\u6267\u884c\u6548\u679c\u4f1a\u66f4\u5feb\uff0c\u6548\u7387\u66f4\u9ad8\uff0c\u66f4\u5e38\u7528\n    }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-41\">5.9 \u4e09\u5143\u8fd0\u7b97\u7b26<\/h2>\n\n\n\n<ul>\n<li>\u683c\u5f0f\uff1a\u5224\u65ad\u6761\u4ef6 <code class=\"prettyprint\" >\uff1f <\/code> \u503c1 <code class=\"prettyprint\" >\uff1a<\/code> \u503c2\uff1b<\/li>\n\n\n\n<li>\u6267\u884c\u6d41\u7a0b\uff1a<br>\u9996\u5148<strong>\u8ba1\u7b97\u5224\u65ad\u6761\u4ef6\u7684\u503c<\/strong><br>\u5982\u679c\u4e3a<strong>true\uff0c\u503c1<\/strong>\u5c31\u662f\u8fd0\u7b97\u7ed3\u679c<br>\u5982\u679c\u4e3a<strong>flase\uff0c\u503c2<\/strong>\u5c31\u662f\u8fd0\u7b97\u7ed3\u679c<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public class OpreatorDemo5 {\n    public static void main(String&#091;] args) {\n        int num1 = 10;\n        int num2 = 20;\n        int max = num1 &gt; num2 ? num1 : num2;\n        System.out.println(max);\n\/\/      \u8f93\u51fa\u4e3a20\uff0c\u5224\u65ad\u6761\u4ef6\u4e3aflase\uff0c\u503c2\u5c31\u662f\u7ed3\u679c\n    }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-42\">5.10 \u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u4f18\u5148\u7ea7<\/td><td>\u8fd0\u7b97\u7b26<\/td><\/tr><tr><td>1<\/td><td>. \uff08\uff09{}<\/td><\/tr><tr><td>2<\/td><td>\uff01- ++ --<\/td><\/tr><tr><td>3<\/td><td>* \/ %<\/td><\/tr><tr><td>4<\/td><td>+ -<\/td><\/tr><tr><td>5<\/td><td>&lt;&lt; &gt;&gt; &gt;&gt;&gt;<\/td><\/tr><tr><td>6<\/td><td>&lt; &lt;= &gt; =&gt; innstanceof<\/td><\/tr><tr><td>7<\/td><td>== !=<\/td><\/tr><tr><td>8<\/td><td>&amp;<\/td><\/tr><tr><td>9<\/td><td>^<\/td><\/tr><tr><td>10<\/td><td>|<\/td><\/tr><tr><td>11<\/td><td>&amp;&amp;<\/td><\/tr><tr><td>12<\/td><td>||<\/td><\/tr><tr><td>13<\/td><td>?:<\/td><\/tr><tr><td>14<\/td><td>= += -= *= \/= %= &amp;=<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-43\">\u516d \u65b9\u6cd5\uff08\u51fd\u6570\uff09<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-44\">6.1 \u65b9\u6cd5\u7684\u4ecb\u7ecd<\/h2>\n\n\n\n<p>\u5982\u679c\u6211\u4eec\u5c06\u4ee3\u7801\u90fd\u5199\u5230\u4e00\u8d77\uff0c\u7ef4\u62a4\u56f0\u96be\uff0c\u96be\u4ee5\u63a7\u5236\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u6211\u4eec\u9700\u8981\u5c06\u76f8\u540c\u529f\u80fd\u7684\u4ee3\u7801\u5355\u72ec\u7f16\u5199\uff0c\u9700\u8981\u7684\u65f6\u5019\u901a\u8fc7\u540d\u5b57\u76f4\u63a5\u627e\u5230\u5b83\uff0c\u66f4\u5229\u4e8e\u7ef4\u62a4<\/p>\n\n\n\n<p>\u6240\u4ee5\u65b9\u6cd5\u5c31\u662f\uff1a<strong>\u4e00\u6bb5\u5177\u6709\u72ec\u7acb\u529f\u80fd\u7684\u4ee3\u7801\u5757\uff0c\u4e0d\u8c03\u7528\u4e0d\u6267\u884c<\/strong><\/p>\n\n\n\n<p>\u65b9\u6cd5\u7684\u4f18\u70b9\u5c31\u662f\uff1a<strong>\u53ef\u4ee5\u5c06\u6211\u4eec\u539f\u672c\u81c3\u80bf\u7684\u4ee3\u7801\uff0c\u6309\u7167\u529f\u80fd\u8fdb\u884c\u5206\u7c7b\u7ba1\u7406\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-45\">6.2 \u65b9\u6cd5\u7684\u5b9a\u4e49\u548c\u8c03\u7528<\/h2>\n\n\n\n<p><strong>\u65b9\u6cd5\u7684\u5b9a\u4e49\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public static void \u65b9\u6cd5\u540d(){\n  \/\/ \u65b9\u6cd5\u4f53\n}<\/code><\/pre>\n\n\n\n<p><strong>\u65b9\u6cd5\u7684\u8c03\u7528\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\u65b9\u6cd5\u540d();<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u6ce8\u610f\u4e8b\u9879\uff1a<\/p>\n\n\n\n<p>1\u3001\u65b9\u6cd5\u4ee5\u65b9\u6cd5\u4e4b\u95f4\u662f\u5e73\u7ea7\u5173\u7cfb\uff0c\u4e0d\u5141\u8bb8\u5d4c\u5957\u5b9a\u4e49\uff08\u6211\u4eec\u5199\u7684\u65b9\u6cd5\u4e0d\u80fd\u5199\u5230\u4e3b\u65b9\u6cd5\u91cc\u9762\uff09<\/p>\n\n\n\n<p>2\u3001\u65b9\u6cd5\u4e0d\u8c03\u7528\u5c31\u4e0d\u6267\u884c\uff0c\u5e76\u4e14\u4e0d\u9650\u5236\u8c03\u7528\u6b21\u6570\uff08\u63d0\u9ad8\u4ee3\u7801\u590d\u7528\u6027\uff09<\/p>\n\n\n\n<p>3\u3001\u65b9\u6cd5\u7684\u5b9a\u4e49\u987a\u5e8f\u548c\u6267\u884c\u987a\u5e8f\u65e0\u5173\uff0c\u6267\u884c\u987a\u5e8f\u53ea\u548c\u8c03\u7528\u6709\u5173<\/p>\n\n\n\n<p><code class=\"prettyprint\" >Ctrl + F12<\/code>    \u5c55\u5f00\u5f53\u524d\u7c7b\u7684\u7ed3\u6784\u5927\u7eb2\uff08\u5feb\u901f\u5bfb\u627e\u5f53\u524d\u7c7b\u7684\u65b9\u6cd5\uff09<\/p>\n\n\n\n<p><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-46\">6.3 Debug\u67e5\u770b\u65b9\u6cd5\u7684\u6267\u884c\u6d41\u7a0b<\/h2>\n\n\n\n<p>1\u3001\u9996\u5148\u5728\u6240\u9700\u8981\u505c\u6b62\u7684\u5730\u65b9\u6dfb\u52a0\u65ad\u70b9<\/p>\n\n\n\n<p>2\u3001\u9009\u62e9Debug\u8fd0\u884c\u6a21\u5f0f\uff0c\u67e5\u770b\u8fd0\u884c\u7ed3\u679c<\/p>\n\n\n\n<p>3\u3001\u5728Debug\u680f\u76ee\uff0c\u5728 <code class=\"prettyprint\" >Framse<\/code> \u4e2d\u53ef\u4ee5\u627e\u5230\u6b63\u5728\u6267\u884c\u7684\u65b9\u6cd5<\/p>\n\n\n\n<p>4\u3001\u70b9\u51fb\u7b2c\u4e8c\u4e2a\u6309\u94ae\u4e3a\u8fdb\u5165\u7684\u6309\u94ae\uff0c\u53ef\u4ee5\u8fdb\u5165\u5230\u653e\u5927\u91cc\u9762<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"616\" height=\"231\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-25.png\" alt=\"\" class=\"wp-image-1545\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-25.png 616w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-25-300x113.png 300w\" sizes=\"(max-width: 616px) 100vw, 616px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"619\" height=\"219\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-26.png\" alt=\"\" class=\"wp-image-1546\" style=\"width:297px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-26.png 619w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-26-300x106.png 300w\" sizes=\"(max-width: 619px) 100vw, 619px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"640\" height=\"239\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-28.png\" alt=\"\" class=\"wp-image-1548\" style=\"width:276px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-28.png 640w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-28-300x112.png 300w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-47\">6.4 \u5e26\u53c2\u6570\u65b9\u6cd5\u7684\u5b9a\u4e49\u548c\u8c03\u7528<\/h2>\n\n\n\n<p>\u5047\u8bbe\u6211\u4eec\u4e4b\u540e\u8fdb\u5165\u516c\u53f8\uff0c\u9700\u8981\u548c\u540c\u4e8b\u914d\u5408\u5f00\u53d1<br>\u6211\u4eec\u6709\u53ef\u80fd\u6211\u5199\u7684\u65b9\u6cd5\uff0c\u522b\u4eba\u53bb\u4f7f\u7528<br>\u6211\u4eec\u521a\u521a\u5b66\u5230\u7684\u65b9\u6cd5\u4e2d\u4f7f\u7528\u7684\u6570\u636e\u662f\u56fa\u5b9a\u7684\uff0c\u6570\u636e\u4e0d\u7075\u6d3b<\/p>\n\n\n\n<p>\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u628a\u9700\u8981\u7684\u53c2\u6570\u7a7a\u51fa\u6765\uff0c\u5c06\u6211\u4eec\u7684\u53c2\u6570\u5199\u5728\u5c0f\u62ec\u53f7\u4e2d\uff0c\u5c31\u662f\u5e26\u53c2\u65b9\u6cd5<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u5b9a\u4e49\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >pubilc static void \u65b9\u6cd5\u540d (\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d) {\n    \/\/ \u65b9\u6cd5\u4f53\n}\n\npubilc static void \u65b9\u6cd5\u540d (\u6570\u636e\u7c7b\u578b1 \u53d8\u91cf\u540d1,\u6570\u636e\u7c7b\u578b2 \u53d8\u91cf\u540d2) {\n    \/\/ \u65b9\u6cd5\u4f53\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading has-medium-font-size\" id=\"toc-48\">6.4.1 \u5f62\u53c2\u548c\u5b9e\u53c2<\/h3>\n\n\n\n<p>\u5f62\u53c2\uff1a\u5168\u79f0\u5f62\u5f0f\u53c2\u6570\uff0c\u662f\u6307\u5728\u5b9a\u4e49\u65b9\u6cd5\u65f6\uff0c\u6240\u58f0\u660e\u7684\u53c2\u6570<\/p>\n\n\n\n<p>\u5b9e\u53c2\uff1a\u5168\u79f0\u5b9e\u9645\u53c2\u6570\uff0c\u8c03\u7528\u65b9\u6cd5\u65f6\uff0c\u6240\u4f20\u5165\u7684\u53c2\u6570<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-49\">6.5 \u5e26\u8fd4\u56de\u503c\u65b9\u6cd5\u7684\u5b9a\u4e49\u548c\u8c03\u7528<\/h2>\n\n\n\n<p>\u6211\u4eec\u7ecf\u5e38\u4f1a<strong>\u6839\u636e\u4e00\u4e2a\u65b9\u6cd5\u4ea7\u51fa\u7684\u7ed3\u679c<\/strong>\uff0c\u6765\u53bb<strong>\u7ec4\u7ec7\u53e6\u5916\u4e00\u6bb5\u4ee3\u7801\u903b\u8f91<\/strong><br>\u4e3a\u4e86<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u62ff\u5230\u8fd9\u4e2a\u65b9\u6cd5\u4ea7\u751f\u7684\u7ed3\u679c<\/mark><\/strong>\uff0c\u5c31\u9700\u8981\u5b9a\u4e49\u5e26\u6709\u8fd4\u56de\u503c\u7684\u65b9\u6cd5<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u5b9a\u4e49\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >public static \u6570\u636e\u7c7b\u578b \u65b9\u6cd5\u540d (\u6570\u636e\u7c7b\u578b1 \u53d8\u91cf\u540d1,\u6570\u636e\u7c7b\u578b2 \u53d8\u91cf\u540d2) {\n    return \u6570\u636e\u503c;\n}<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"113\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-29-1024x113.png\" alt=\"\" class=\"wp-image-1556\" style=\"width:870px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-29-1024x113.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-29-300x33.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-29-768x85.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-29-1536x169.png 1536w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/09\/image-29.png 1770w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u8c03\u7528\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d = \u65b9\u6cd5\u540d(\u5b9e\u53c21,\u5b9e\u53c22);<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-50\">6.6 \u65b9\u6cd5\u7684\u901a\u7528\u5b9a\u4e49\u683c\u5f0f<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >pubilc static \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d (\u53c2\u6570) {\n    \u65b9\u6cd5\u4f53\n    return \u6570\u636e;\n}<\/code><\/pre>\n\n\n\n<p>\u5b9a\u4e49\u65b9\u6cd5\u65f6\uff0c\u8981\u505a\u5230\u4e24\u4e2a\u660e\u786e<\/p>\n\n\n\n<p>\u660e\u786e\u53c2\u6570\uff1a\u4e3b\u8981\u660e\u786e\u53c2\u6570\u7684\u7c7b\u578b\u548c\u6570\u91cf<\/p>\n\n\n\n<p>\u660e\u786e\u8fd4\u56de\u503c\uff1a\u4e3b\u8981\u660e\u786e\u65b9\u6cd5\u7ed3\u675f\u540e\u662f\u5426\u6709\u7ed3\u679c\u6570\u636e\uff0c\u4ee5\u53ca\u5bf9\u5e94\u53c2\u6570\u7c7b\u578b\u3002\uff08\u5982\u679c\u6ca1\u6709\u5219\u5199<code class=\"prettyprint\" >void<\/code>\uff09<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u65b9\u6cd5\u8fd4\u56de\u503c\u7c7b\u578b\u4e3a<code class=\"prettyprint\" >void<\/code>\uff0c\u8868\u793a\u65b9\u6cd5\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u6ca1\u6709\u8fd4\u56de\u503c\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7701\u7565return\u8bed\u53e5<br>\u5982\u679c\u8981\u7f16\u5199<code class=\"prettyprint\" >return<\/code>,\u540e\u9762\u4e0d\u80fd\u66f4\u5177\u4f53\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<p><code class=\"prettyprint\" >return<\/code>\u4e0b\u9762\u7684\u4ee3\u7801\u4e0d\u4f1a\u6267\u884c\uff0c\u56e0\u4e3a\u6c38\u8fdc\u6267\u884c\u4e0d\u5230\uff0c\u5c5e\u4e8e\u65e0\u6548\u4ee3\u7801\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-51\">6.7 \u65b9\u6cd5\u91cd\u8f7d<\/h2>\n\n\n\n<p>\u5728\u8c03\u7528\u65b9\u6cd5\u7684\u65f6\u5019\uff0cJava\u865a\u62df\u673a\u4f1a\u6839\u636e<strong>\u53c2\u6570\u7684\u4e0d\u540c<\/strong>\u6765<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u533a\u5206<\/mark>\u540c\u540d\u7684\u65b9\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >pubilc class Test {\n    pubilc static int add (int a,int b){\n        return a + b;\n    }\n    pubilc static int add (double a,double  b){\n        return a + b;\n    }\n    pubilc static int add (int a,int b,int c){\n        return a + b + c;\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u5b9a\u4e49\u4e86\u591a\u4e2a<strong>\u540c\u540d\u7684\u65b9\u6cd5<\/strong>\uff0c\u6bcf\u4e2a\u65b9\u6cd5\u5177\u6709<strong>\u4e0d\u540c\u7684\u53c2\u6570\u7c7b\u578b\u6216\u53c2\u6570\u4e2a\u6570<\/strong><br>\u8fd9\u4e9b\u540c\u540d\u7684\u65b9\u6cd5\uff0c\u5c31\u6784\u6210\u4e86<strong>\u91cd\u8f7d\u5173\u7cfb<\/strong><\/p>\n\n\n\n<p>\u540c\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u65b9\u6cd5\u540d\u76f8\u540c\uff0c<strong>\u4e2a\u6570\u4e0d\u540c\u3001\u7c7b\u578b\u4e0d\u540c\u3001\u987a\u5e8f\u4e0d\u540c<\/strong>\uff0c\u5c31\u662f<strong>\u65b9\u6cd5\u91cd\u8f7d\u5173\u7cfb<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"has-small-font-size\">\u53ea\u770b\u65b9\u6cd5\u540d\u548c\u53c2\u6570\uff0c\u4e0e\u8fd4\u56de\u503c\u65e0\u5173<\/p>\n<\/blockquote>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u65b9\u6cd5\u91cd\u8f7d\u7684\u597d\u5904\u662f\u4e0d\u7528\u8bb0\u5fc6\u8fc7\u591a\u7e41\u7410\u7684\u65b9\u6cd5\u540d<\/strong><\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-52\">\u4e03 \u6d41\u7a0b\u63a7\u5236\u8bed\u53e5<\/h1>\n\n\n\n<p>\u6d41\u7a0b\u63a7\u5236\u8bed\u53e5\u5c31\u662f\u901a\u8fc7\u4e00\u4e9b\u8bed\u53e5\uff0c\u6765\u63a7\u5236\u7a0b\u5e8f\u7684<strong>\u6267\u884c\u6d41\u7a0b<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"278\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-1-1024x278.png\" alt=\"\" class=\"wp-image-1572\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-1-1024x278.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-1-300x81.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-1-768x209.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-1.png 1197w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-53\">7.1 \u987a\u5e8f\u7ed3\u6784<\/h2>\n\n\n\n<p>Java\u7684\u9ed8\u8ba4\u6267\u884c\u6d41\u7a0b\uff0c\u6ca1\u6709\u7279\u5b9a\u8bed\u6cd5\uff0c\u6309\u7167\u4ee3\u7801\u987a\u5e8f\u5148\u540e\u53bb\u6267\u884c\uff0c\u4f9d\u6b21\u6267\u884c\u7a0b\u5e8f\u4e2d\u5927\u591a\u6570\u7684\u4ee3\u7801<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-54\">7.2 \u5206\u652f\u7ed3\u6784<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-55\">7.2.1 if \u8bed\u53e5<\/h3>\n\n\n\n<ul>\n<li>\u683c\u5f0f\u4e00 \uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >if (\u5224\u65ad\u6761\u4ef6) {\n    \u8bed\u53e5\u4f53;\n}<\/code><\/pre>\n\n\n\n<p>\u6267\u884c\u6d41\u7a0b\uff1a<\/p>\n\n\n\n<p>1\u3001\u9996\u5148\u8ba1\u7b97\u5224\u65ad\u6761\u4ef6\u7684\u7ed3\u679c<\/p>\n\n\n\n<p>2\u3001\u5982\u679c\u5224\u65ad\u6761\u4ef6\u4e3a <code class=\"prettyprint\" >true<\/code> \u5c31\u6267\u884c\u8bed\u53e5\u4f53<\/p>\n\n\n\n<p>3\u3001\u5982\u679c\u5224\u65ad\u6761\u4ef6\u4e3a <code class=\"prettyprint\" >false<\/code> \u5c31\u4e0d\u6267\u884c\u8bed\u53e5\u4f53<\/p>\n\n\n\n<ul>\n<li>\u683c\u5f0f\u4e8c \uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >if (\u5224\u65ad\u6761\u4ef6) {\n    \u8bed\u53e5\u4f531;\n} else {\n    \u8bed\u53e5\u4f532;\n}<\/code><\/pre>\n\n\n\n<p>\u6267\u884c\u6d41\u7a0b\uff1a<\/p>\n\n\n\n<p>1\u3001\u9996\u5148\u5224\u65ad\u8ba1\u7b97\u7ed3\u679c<\/p>\n\n\n\n<p>2\u3001\u5982\u679c\u6761\u4ef6\u4e3a <code class=\"prettyprint\" >true<\/code> \u5c31\u6267\u884c\u8bed\u53e5\u4f531<\/p>\n\n\n\n<p>3\u3001\u5982\u679c\u6761\u4ef6\u4e3a <code class=\"prettyprint\" >false<\/code> \u5c31\u6267\u884c\u8bed\u53e5\u4f532<\/p>\n\n\n\n<ul>\n<li>\u683c\u5f0f\u4e09<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >if (\u5224\u65ad\u6761\u4ef61) {\n    \u8bed\u53e5\u4f531;\t\n} else if (\u5224\u65ad\u6761\u4ef62) {\n    \u8bed\u53e5\u4f532;\t\n} else {\n    \u8bed\u53e5\u4f53n+1;\n}\n<\/code><\/pre>\n\n\n\n<p>\u6267\u884c\u6d41\u7a0b\uff1a<\/p>\n\n\n\n<p>1\u3001\u9996\u5148\u8ba1\u7b97\u5224\u65ad\u6761\u4ef61\u7684\u503c<\/p>\n\n\n\n<p>2\u3001\u5982\u679c\u503c\u4e3atrue\u5c31\u6267\u884c\u8bed\u53e5\u4f531\uff1b\u5982\u679c\u503c\u4e3afalse\u5c31\u8ba1\u7b97\u5224\u65ad\u6761\u4ef62\u7684\u503c<\/p>\n\n\n\n<p>3\u3001\u5982\u679c\u503c\u4e3atrue\u5c31\u6267\u884c\u8bed\u53e5\u4f532\uff1b\u5982\u679c\u503c\u4e3afalse\u5c31\u8ba1\u7b97\u5224\u65ad\u6761\u4ef63\u7684\u503c<\/p>\n\n\n\n<p>4\u3001\u5982\u679c\u6ca1\u6709\u4efb\u4f55\u5224\u65ad\u6761\u4ef6\u4e3atrue\uff0c\u5c31\u6267\u884c\u8bed\u53e5\u4f53n+1\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-56\">7.2.2 switch \u8bed\u53e5<\/h3>\n\n\n\n<p>\u683c\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >switch(\u8868\u8fbe\u5f0f) {\n    case \u503c1\uff1a\n\t\u8bed\u53e5\u4f531;\n\tbreak;\n    case \u503c2\uff1a\n\t\u8bed\u53e5\u4f532;\n\tbreak;\n    default\uff1a\n\t\u8bed\u53e5\u4f53n+1;\n\tbreak;\n}<\/code><\/pre>\n\n\n\n<p><code class=\"prettyprint\" >default<\/code>\u5bf9\u4e8e\u8bed\u6cd5\u6765\u8bf4\uff0c\u4e0d\u5199\u662f\u4e0d\u5f71\u54cd\u7684\uff0c\u4f46\u662f\u4e3a\u4e86\u89c4\u8303\u9700\u8981\u5199<code class=\"prettyprint\" >default<\/code><\/p>\n\n\n\n<p><strong>\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n\n\n\n<p>1\u3001case\u540e\u9762\u7684\u503c\u4e0d\u5141\u8bb8\u91cd\u590d<\/p>\n\n\n\n<p>2\u3001case\u540e\u9762\u53ea\u80fd\u662f\u5b57\u9762\u91cf\uff0c\u4e0d\u80fd\u662f\u53d8\u91cf<\/p>\n\n\n\n<p>3\u3001switch\uff08\uff09\u4e2d\u53ef\u4ee5\u63a5\u6536\u7684\u7c7b\u578b\uff1a<br>    \u57fa\u672c\u6570\u636e\u7c7b\u578b\uff1abyte  short  char  int<br>    \u5f15\u7528\u6570\u636e\u7c7b\u578b\uff1ajdk5\u7248\u672c\u5f00\u59cb\u53ef\u4ee5\u662f\u679a\u4e3e\uff0cjdk7\u7248\u672c\u5f00\u59cb\u53ef\u4ee5\u662fstring\u5b57\u7b26\u4e32<\/p>\n\n\n\n<p>4\u3001switch\u8bed\u53e5\u7684case\u7684\u7a7f\u900f\u73b0\u8c61\uff1a<br>\u8fd9\u4e2a\u8bf4\u7684\u662fswitch\u8bed\u53e5\u4e2d\u6ca1\u5199break\u7684\u60c5\u51b5<br>\u6b63\u5e38\u60c5\u51b5\u4f1a\u6709break\u6765\u7ed3\u675fcase\uff0c\u4f46\u662f\u5982\u679c\u6ca1\u6709\u5199\uff0c\u4ed6\u5c06\u4f1a\u5411\u4e0b\u7a7f\u900f\uff0c\u76f4\u5230break\u7ed3\u675f\u6216\u4ee3\u7801\u7ed3\u675f<\/p>\n\n\n\n<p>5\u3001case\u540e\u9762\u5141\u8bb8\u7f16\u5199\u591a\u4e2a\u6570\u636e\uff0c\u901a\u8fc7,\u5206\u9694\u3002<code class=\"prettyprint\" >case 1,2,3,4,5 :<\/code><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u66f4\u7b80\u5355\u7684\u683c\u5f0f\uff1a(\u4f7f\u7528\u7bad\u5934\u76f4\u63a5\u6307\u5411\u6211\u4eec\u8981\u505a\u7684\u4e8b)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >switch(week){\n    case 1,2,3,4,5 -&gt; System.out.println(&quot;\u5de5\u4f5c\u65e5&quot;);\n    case 6,7 -&gt; System.out.println(&quot;\u4f11\u606f\u65e5&quot;);\n    default -&gt; System.out.println(&quot;\u8f93\u5165\u6709\u8bef&quot;);\n}<\/code><\/pre>\n\n\n\n<p>if \u8bed\u53e5 \u9002\u7528\u4e8e\u8303\u56f4\u6027\u7684\u5224\u65ad<\/p>\n\n\n\n<p>switch \u8bed\u53e5 \u9002\u7528\u4e8e\u56fa\u5b9a\u503c\u5224\u65ad<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-57\">7.3 \u5faa\u73af\u8bed\u53e5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-58\">7.3.1 for \u5faa\u73af<\/h3>\n\n\n\n<p><strong>\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >for(\u521d\u59cb\u5316\u8bed\u53e5;\u6761\u4ef6\u5224\u65ad\u8bed\u53e5;\u6761\u4ef6\u63a7\u5236\u8bed\u53e5){\n    \u5faa\u73af\u4f53\u8bed\u53e5;\n}\n\n\/\/  \u5faa\u73af\u4f53\u8bed\u53e5\uff1a\u5faa\u73af\u4efb\u52a1\n\/\/  sout(&quot;\u8dd1\u5708&quot;);\n\/\/  \u521d\u59cb\u5316\u8bed\u53e5\uff1a\u5b9a\u4e49\u53d8\u91cf\n\/\/  int i = 1;\n\/\/  \u6761\u4ef6\u5224\u65ad\u8bed\u53e5\uff1a\u5faa\u73af\u6761\u4ef6\n\/\/  i &lt; 4\n\/\/  \u6761\u4ef6\u63a7\u5236\u8bed\u53e5\uff1a\u6539\u53d8\u53d8\u91cf\n\/\/  i++;<\/code><\/pre>\n\n\n\n<p><strong>\u6267\u884c\u6d41\u7a0b\uff1a<\/strong><\/p>\n\n\n\n<p>1\u3001\u6267\u884c\u521d\u59cb\u5316\u8bed\u53e5\uff0c\u5728\u6574\u4e2a\u5faa\u73af\u8fc7\u7a0b\u4e2d\uff0c\u53ea\u4f1a\u6267\u884c\u4e00\u6b21<\/p>\n\n\n\n<p>2\u3001\u6267\u884c\u5224\u65ad\u6761\u4ef6\uff0c\u770b\u8d77\u8fd4\u56de\u7684\u7ed3\u679c\u662ftrue\u8fd8\u662ffalse<br>      false\uff1a\u5faa\u73af\u7ed3\u675f<br>      true\uff1a\u6267\u884c\u7b2c\u4e09\u6b65<\/p>\n\n\n\n<p>3\u3001\u6267\u884c\u5faa\u73af\u4f53\u8bed\u53e5<\/p>\n\n\n\n<p>4\u3001\u6267\u884c\u6761\u4ef6\u63a7\u5236\u8bed\u53e5<\/p>\n\n\n\n<p>5\u3001\u56de\u5230\u7b2c\u4e8c\u6b65\u7ee7\u7eed\u6267\u884c<\/p>\n\n\n\n<p><strong>\u5feb\u6377\u5199\u6cd5\uff1a<\/strong><code class=\"prettyprint\" >5.fori<\/code> \u5199\u8fd9\u4e2a\u5c06\u4f1a\u751f\u6210\u4e00\u4e2a\u5faa\u73af\u4e94\u6b21\u7684for\u5faa\u73af<\/p>\n\n\n\n<p><strong>\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n\n\n\n<p>1\u3001for\u5faa\u73af <code class=\"prettyprint\" >{}<\/code> \u5f53\u4e2d\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u5728\u6bcf\u4e00\u8f6e\u5faa\u73af\u7ed3\u675f\u4ee5\u540e\uff0c\u90fd\u4f1a\u4ece\u5185\u5b58\u4e2d\u91ca\u653e<\/p>\n\n\n\n<p>2\u3001for\u5faa\u73af <code class=\"prettyprint\" >()<\/code> \u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u4f1a\u5728\u6574\u4e2a\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u4ece\u5185\u5b58\u4e2d\u91ca\u653e<\/p>\n\n\n\n<p>3\u3001for\u5faa\u73af <code class=\"prettyprint\" >()<\/code> \u548c <code class=\"prettyprint\" >{}<\/code> \u4e4b\u95f4\u4e0d\u8981\u5199\u5206\u53f7<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-59\">7.3.2 \u5faa\u73af\u5d4c\u5957<\/h3>\n\n\n\n<p><strong>\u5faa\u73af\u5d4c\u5957\uff1a\u518d\u5faa\u73af\u8bed\u53e5\u4e2d\uff0c\u7ee7\u7eed\u51fa\u73b0\u5faa\u73af\u8bed\u53e5<\/strong><\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5f53\u5faa\u73af\u4f53\u7ed3\u675f\uff0c\u624d\u4f1a\u8fdb\u884c\u4e0b\u4e00\u6b21\u5faa\u73af<\/mark><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >for(int i = 1;i &lt;= 5; i++){\n    for(int j = 1;j &lt;= 5; J++){\n        System.out.println(&quot;HelloWorld&quot;);\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8ff0\u4ee3\u7801\uff1a\u5206\u4e3a<strong>\u5916\u5faa\u73af\u548c\u5185\u5faa\u73af<\/strong>\uff0c\u5148\u6267\u884c\u5185\u5faa\u73af\uff0c<strong>\u5916\u5faa\u73af\u6267\u884c\u4e00\u6b21\uff0c\u5185\u5faa\u73af\u6267\u884c\u4e94\u6b21<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>System.out.println(\"\") \u6253\u5370\u6570\u636e\u540e\uff0c\u6709\u6362\u884c<\/p>\n\n\n\n<p>System.out.print(\"\") \u7b54\u5e94\u6570\u636e\u540e\uff0c\u6ca1\u6709\u6362\u884c<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-60\">7.3.3 while \u5faa\u73af\u683c\u5f0f\u4e0e\u6267\u884c\u6d41\u7a0b<\/h3>\n\n\n\n<p><strong>\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\u521d\u59cb\u5316\u8bed\u53e5;\nwhile (\u6761\u4ef6\u683c\u5f0f\u5224\u65ad\u8bed\u53e5) {\n    \u5faa\u73af\u4f53\u8bed\u53e5;\n    \u6761\u4ef6\u63a7\u5236\u8bed\u53e5;\n}<\/code><\/pre>\n\n\n\n<p><strong>\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >int i = 1;\nwhile(i &lt;= 5){\n    System.out.println(&quot;\u9ed1\u9a6c\u7a0b\u5e8f\u5458&quot;);\n    i++;\n}<\/code><\/pre>\n\n\n\n<p><strong>\u6267\u884c\u6d41\u7a0b\uff1a<\/strong><\/p>\n\n\n\n<p>1\u3001\u6267\u884c\u521d\u59cb\u5316\u8bed\u53e5<\/p>\n\n\n\n<p>2\u3001\u6267\u884c\u5224\u65ad\u6761\u4ef6\uff0c\u770b\u5176\u8fd4\u56de\u7ed3\u679c\u662ftrue\uff0cfalse<br>      false\uff1a\u5faa\u73af\u7ed3\u675f<br>      true\uff1a\u7ee7\u7eed\u6267\u884c\uff0c\u8fdb\u5165\u7b2c\u4e09\u6b65<\/p>\n\n\n\n<p>3\u3001\u6267\u884c\u5faa\u73af\u4f53\u8bed\u53e5<\/p>\n\n\n\n<p>4\u3001\u6267\u884c\u6761\u4ef6\u63a7\u5236\u8bed\u53e5<\/p>\n\n\n\n<p>5\u3001\u56de\u5230\u7b2c\u4e8c\u6b65\u7ee7\u7eed\u6267\u884c<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-61\">7.3.4 do...while \u5faa\u73af\u683c\u5f0f\u4e0e\u6267\u884c\u6d41\u7a0b<\/h3>\n\n\n\n<p><strong>\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\u521d\u59cb\u5316\u8bed\u53e5;\ndo {\n    \u5faa\u73af\u4f53\u8bed\u53e5;\n    \u6761\u4ef6\u5faa\u73af\u8bed\u53e5;\n} while (\u6761\u4ef6\u5224\u65ad\u8bed\u53e5);<\/code><\/pre>\n\n\n\n<p><strong>\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >int i = 1;\ndo{\n    System.out.println(&quot;\u9ed1\u9a6c\u7a0b\u5e8f\u5458&quot;)\n    i++;\n} while(i &lt;= 5);<\/code><\/pre>\n\n\n\n<p><strong>\u6267\u884c\u6d41\u7a0b\uff1a<\/strong><\/p>\n\n\n\n<p>1\u3001\u6267\u884c\u521d\u59cb\u5316\u8bed\u53e5<\/p>\n\n\n\n<p>2\u3001\u6267\u884c\u5faa\u73af\u4f53\u8bed\u53e5<\/p>\n\n\n\n<p>3\u3001\u6267\u884c\u6761\u4ef6\u63a7\u5236\u8bed\u53e5<\/p>\n\n\n\n<p>4\u3001\u6267\u884c\u5224\u65ad\u6761\u4ef6\uff0c\u770b\u5176\u770b\u4f1a\u7684\u7ed3\u679c\u662ftrue\uff0cfalse<br>      false\uff1a\u5faa\u73af\u7ed3\u679c<br>      true\uff1a\u56de\u5230\u7b2c\u4e8c\u6b65\u6267\u884c<\/p>\n\n\n\n<p><strong>\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n\n\n\n<p><strong>do...while \u5faa\u73af\u81f3\u5c11\u4f1a\u6267\u884c\u4e00\u6b21\u5faa\u73af\u4f53\u8bed\u53e5<\/strong>\uff08\u65e0\u8bba\u6761\u4ef6\u662f\u5426\u6ee1\u8db3\uff0c\u90fd\u4f1a\u6267\u884c\u4e00\u6b21\uff09<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-62\">7.3.5 \u4e09\u79cd\u5faa\u73af\u7684\u533a\u522b<\/h3>\n\n\n\n<ul>\n<li>for\u5faa\u73af \u548c while\u5faa\u73af \uff08\u5148\u6267\u884c\u540e\u5224\u65ad\uff09<\/li>\n\n\n\n<li>do...while \uff08\u5148\u6267\u884c\u540e\u5224\u65ad\uff09<\/li>\n<\/ul>\n\n\n\n<p><strong>for\u5faa\u73af\u548cwhile\u5faa\u73af\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/strong><\/p>\n\n\n\n<p>for\u5faa\u73af\uff1a\u7528\u4e8e\u63a7\u5236\u5faa\u73af\u7684\u53d8\u91cf\uff0c\u5728\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u5c31\u4f1a\u4ece\u5185\u5b58\u4e2d\u6d88\u5931\uff0c<strong>\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u4e0d\u80fd\u518d\u4f7f\u7528<\/strong><\/p>\n\n\n\n<p>while\u5faa\u73af\uff1a\u7528\u4e8e\u63a7\u5236\u5faa\u73af\u7684\u53d8\u91cf\uff0c\u5728\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u4e0d\u4f1a\u5728\u5185\u5b58\u4e2d\u6d88\u5931\uff0c<strong>\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u53ef\u4ee5\u7ee7\u7eed\u4f7f\u7528<\/strong><\/p>\n\n\n\n<p>\u56e0\u4e3a\u6211\u4eec<strong>for\u5faa\u73af\u5c06\u53d8\u91cf\u5b9a\u4e49\u5728\u5faa\u73af\u91cc\u9762<\/strong>\uff0c\u800c<strong>while\u5219\u5c06\u5faa\u73af\u5b9a\u4e49\u5728\u5faa\u73af\u5916\u9762<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-63\">7.4 \u8df3\u8f6c\u63a7\u5236\u8bed\u53e5<\/h2>\n\n\n\n<p>\u6709\u65f6\u5019\u5728\u5faa\u73af\u8fc7\u7a0b\u4e2d\uff0c\u662f\u9700\u8981\u5f3a\u884c\u505a\u7ed3\u675f\u7684\u3002<br>\u8fd9\u65f6\u5019\u6211\u4eec\u5c31\u9700\u8981\u8df3\u8f6c\u63a7\u5236\u8bed\u53e5\uff0c\u7528\u4e8e\u505c\u6b62\u5faa\u73af\u7684\u6267\u884c\uff0c\u6216\u8005\u8df3\u8fc7\u6267\u884c\u3002<\/p>\n\n\n\n<p><code class=\"prettyprint\" >break<\/code>\u5173\u952e\u5b57\u7684\u7528\u5904\u5c31\u662f\uff0c\u7ed3\u675f\u5faa\u73af\u6216switch\u8bed\u53e5\uff08<strong>\u7ed3\u675f<\/strong>\uff09<br>\u4f46\u662f\u4e00\u822c\u662f\u80fd\u5728\u5faa\u73af\u6216\u8005switch\u4e2d\u4f7f\u7528\u3002<\/p>\n\n\n\n<p><code class=\"prettyprint\" >continue<\/code>\u5173\u952e\u5b57\u7684\u7528\u5904\u5c31\u662f\uff0c\u8df3\u8fc7\u672c\u6b21\u5faa\u73af\u7ee7\u7eed\u4e0b\u4e00\u6b21\u5faa\u73af\uff08<strong>\u8df3\u8fc7<\/strong>\uff09<br>\u4e00\u822c\u53ea\u80fd\u5728\u5faa\u73af\u5f53\u4e2d\u4f7f\u7528\uff0c\u5982\u679c\u8131\u79bb\u4e86\u5faa\u73af\u5c31\u4f1a\u62a5\u9519\u3002<\/p>\n\n\n\n<p><code class=\"prettyprint\" >break<\/code> <code class=\"prettyprint\" >continue<\/code>\u8fd9\u4e24\u4e2a\u5173\u952e\u5b57\u7684\u4e0b\u9762\u4e0d\u80fd\u5728\u5199\u4ee3\u7801\uff0c\u56e0\u4e3a\u6267\u884c\u4e0d\u5230\u5c31\u5df2\u7ecf\u7ed3\u675f\u4e86\uff0c\u5c5e\u4e8e\u65e0\u6548\u4ee3\u7801<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-64\">7.5 Random\u968f\u673a\u6570<\/h2>\n\n\n\n<p><strong>\u4e66\u5199\u6d41\u7a0b\uff1a<\/strong><\/p>\n\n\n\n<p>1\u3001\u627e\u7b26\u5492\uff08\u5bfc\u5305\uff09<\/p>\n\n\n\n<p>2\u3001\u53ec\u5524\u7cbe\u7075\uff08\u5f15\u7528\u5b9a\u4e49Random\uff09<\/p>\n\n\n\n<p>3\u3001\u6307\u6325\u7cbe\u7075\u5e72\u6d3b\uff08\u4f7f\u7528Random\uff09<\/p>\n\n\n\n<p><strong>\u4f8b\uff1a<\/strong>(\u751f\u6210\u4e00\u4e2a10\u4ee5\u5185\u7684\u968f\u673a\u6574\u6570[\u4e0d\u5305\u542b10])<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"195\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-2-1024x195.png\" alt=\"\" class=\"wp-image-1604\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-2-1024x195.png 1024w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-2-300x57.png 300w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-2-768x146.png 768w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/10\/image-2.png 1426w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >import java.util.Random\npublic class Test {\n    pubilc static void main\uff08String&#091;] args\uff09{\n        Random r = new Random();\n        int num = r.nextInt(10);    \n    }\n}<\/code><\/pre>\n\n\n\n<p><strong>\u4e5f\u53ef\u4ee5\u7ed9\u968f\u673a\u6570\u8fdb\u884c\u8ba1\u7b97\uff1a<\/strong>(\u751f\u6210\u4e00\u4e2a1~10\u7684\u968f\u673a\u6570)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >int num = r.nextInt(10)+1; <\/code><\/pre>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"toc-65\">\u516b \u6570\u7ec4<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-66\">8.1 \u6570\u7ec4\u7684\u4ecb\u7ecd<\/h2>\n\n\n\n<ul>\n<li>\u6570\u7ec4\u6307\u7684\u662f\u4e00\u79cd<strong>\u5bb9\u5668<\/strong>\uff0c\u53ef\u4ee5\u7528\u6765\u5b58\u50a8\u540c\u79cd\u6570\u636e\u7c7b\u578b\u7684<strong>\u591a\u4e2a\u503c<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u5f53\u6211\u4eec\u6709\u591a\u4e2a\u53d8\u91cf\u9700\u8981\u540c\u65f6\u5b58\u50a8\u65f6\uff0c\u5c31\u9700\u8981\u6570\u7ec4\u6765\u5f53\u5bb9\u5668<\/p>\n\n\n\n<p>\u6570\u636e\u8fc7\u591a\u4f1a\u5bfc\u81f4\u6570\u636e\u8fc7\u4e8e\u96f6\u6563\uff0c\u4e0d\u5b9c\u7ef4\u62a4\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-67\">8.2 \u6570\u7ec4\u9759\u6001\u521d\u59cb\u5316<\/h2>\n\n\n\n<p>\u521d\u59cb\u5316\uff1a\u5c31\u662f\u5728\u5185\u5b58\u4e2d\uff0c\u4e3a\u6570\u7ec4\u5bb9\u5668\u5f00\u8f9f\u7a7a\u95f4\uff0c\u5e76\u5c06\u6570\u636e\u5b58\u5165\u5185\u5b58\u4e2d\u7684\u8fc7\u7a0b<\/p>\n\n\n\n<p><strong>\u6570\u7ec4\u7684\u5b9a\u4e49\u683c\u5f0f<\/strong>  \u4e00\u822c\u4f7f\u7528<strong>\u683c\u5f0f\u4e00<\/strong>\u548c<strong>\u7b80\u5316\u683c\u5f0f<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\/\/ \u683c\u5f0f\u4e00\n\u6570\u636e\u7c7b\u578b&#091;] \u6570\u636e\u540d;\nint&#091;] arr\n\n\/\/ \u683c\u5f0f\u4e8c\n\u6570\u636e\u7c7b\u578b \u6570\u7ec4\u540d&#091;];\nint arr&#091;]\n\n\/\/ \u6570\u7ec4\u9759\u6001\u521d\u59cb\u5316\u7684\u683c\u5f0f\n\/\/ \u5b8c\u6574\u683c\u5f0f\uff1a\n\u6570\u636e\u7c7b\u578b&#091;] \u6570\u7ec4\u540d = new \u6570\u636e\u7c7b\u578b&#091;]{\u5143\u7d201,\u5143\u7d202,\u5143\u7d203...};\nint&#091;] arr = new int&#091;]{1,2,3};\n\n\/\/\u7b80\u5316\u683c\u5f0f\uff1a\n\u6570\u636e\u7c7b\u578b&#091;] \u6570\u7ec4\u540d = {\u5143\u7d201,\u5143\u7d202,\u5143\u7d203...};\nint&#091;] arr = {1,2,3}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-68\">8.3 \u6570\u7ec4\u7684\u5143\u7d20\u8bbf\u95ee<\/h2>\n\n\n\n<p>\u6570\u7ec4\u8bbf\u95ee\u683c\u5f0f\uff08\u8c03\u7528\u683c\u5f0f\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\/\/ \u5f53\u6211\u4eec\u76f4\u63a5\u6253\u5370\u6570\u7ec4\u540d\u7684\u65f6\u5019\uff0c\u8f93\u51fa\u7684\u662f\u6570\u7ec4\u7684\u5185\u5b58\u5730\u5740\uff1a\nSystem.out.println(arr);  \/\/ \u8f93\u51fa\uff1a&#091;I@776ec8fd    \u8f93\u51fa\u7684\u8fd9\u4e00\u6bb5\u5c31\u662f\u5f53\u524d\u6570\u7ec4\u7684\u5185\u5b58\u5730\u5740\n\n\/\/ \u6b63\u786e\u7684\u6570\u7ec4\u8bbf\u95ee\u683c\u5f0f\uff1a\n\u6570\u7ec4\u540d&#091;\u7d22\u5f15];\narr&#091;0]<\/code><\/pre>\n\n\n\n<p>\u7d22\u5f15\u5c31\u662f\u6570\u7ec4\u7684\u53d8\u91cf\u7684\u5bf9\u5e94\u7a7a\u95f4\u7684\u7f16\u53f7\uff08<strong>\u4ece0\u5f00\u59cb<\/strong>\uff09<\/p>\n\n\n\n<p>\u7d22\u5f15\uff1a\u7d22\u5f15\u662f\u6570\u7ec4\u5bb9\u5668\u4e2d\u7a7a\u95f4\u7684\u7f16\u53f7\uff0c\u7f16\u53f7\u4ece0\u5f00\u59cb\uff0c\u9010\u4e2a+1\u589e\u957f<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-69\">8.4 \u6570\u7ec4\u904d\u5386\u64cd\u4f5c<\/h2>\n\n\n\n<p>\u6570\u7ec4\u904d\u5386\u5c31\u662f\u5c06\u6570\u7ec4\u6240\u6709\u5185\u5bb9\uff0c\u53d6\u51fa\u6765\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\/\/ \u6570\u7ec4\u540d.length  \u83b7\u53d6\u5f53\u524d\u6570\u7ec4\u7684\u957f\u5ea6\nint&#091;] arr = {11,22,33,44,55}\nSystem.out.println(&quot;arr.length&quot;)  \/\/\u6253\u5370\u51fa\u6765\u662f5\n\n\/\/ \u904d\u5386\u6570\u7ec4\u7684\u4ee3\u7801\u5c31\u662f\uff1a\nfor(int i = 0; i &lt; arr.length; i++){\n    System.out.println(arr&#091;i]);\n}\n\n\/\/ \u6570\u7ec4\u904d\u5386\u7684\u5feb\u6377\u952e\uff1a  \u6570\u7ec4\u540d.fori<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-70\">8.5 \u6570\u7ec4\u52a8\u6001\u521d\u59cb\u5316<\/h2>\n\n\n\n<p>\u521d\u59cb\u5316\u65f6\u53ea\u6307\u5b9a\u957f\u5ea6\uff0c\u7531\u7cfb\u7edf\u4e3a\u6570\u7ec4\u5206\u914d<strong>\u521d\u59cb\u503c<\/strong>\uff08\u9ed8\u8ba4\u503c\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\/\/ \u683c\u5f0f\n\u6570\u636e\u7c7b\u578b&#091;] \u6570\u7ec4\u540d = new \u6570\u636e\u7c7b\u578b&#091;\u6570\u636e\u957f\u5ea6];\nint&#091;] arr = new int&#091;3];<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5404\u4e2a\u7c7b\u578b\u7684\u9ed8\u8ba4\u503c\uff1a<br>\u6574\u6570\uff1a0<br>\u5c0f\u6570\uff1a0.0<br>\u5e03\u5c14\u503c\uff1afalse<br>\u5b57\u7b26\uff1a'\\u0000'<br>\u5f15\u7528\u6570\u636e\u7c7b\u578b\uff1anull<\/p>\n<\/blockquote>\n\n\n\n<ul>\n<li>\u52a8\u6001\u521d\u59cb\u5316\uff1a\u624b\u52a8<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-pale-cyan-blue-color\">\u6307\u5b9a\u6570\u7ec4\u957f\u5ea6<\/mark>\uff0c\u7531\u7cfb\u7edf\u7ed9\u51fa\u9ed8\u8ba4\u521d\u59cb\u5316\u503c<\/li>\n\n\n\n<li>\u9759\u6001\u521d\u59cb\u5316\uff1a\u624b\u52a8<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-green-cyan-color\">\u6307\u5b9a\u6570\u7ec4\u5143\u7d20<\/mark>\uff0c\u7cfb\u7edf\u4f1a\u6839\u636e\u5143\u7d20\u4e2a\u6570\uff0c\u8ba1\u7b97\u51fa\u6570\u7ec4\u7684\u957f\u5ea6<\/li>\n\n\n\n<li><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-71\">8.6 \u6570\u7ec4\u5e38\u89c1\u95ee\u9898<\/h2>\n\n\n\n<p>\u5982\u679c\u9047\u5230\u62a5\u9519\uff0c\u4e00\u822c\u4ece\u4e0b\u5f80\u4e0a\u770b\uff1b<\/p>\n\n\n\n<ul>\n<li><strong>ArrayIndexOutOfBoundsException<\/strong>  <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7d22\u5f15\u8d8a\u754c\u5f02\u5e38<\/mark><\/strong><br>\u5f53\u8bbf\u95ee\u4e86\u6570\u7ec4\u4e2d\u4e0d\u5b58\u5728\u7684\u7d22\u5f15\uff0c\u5c31\u4f1a\u5f15\u53d1\u7d22\u5f15\u8d8a\u754c\u5f02\u5e38<\/li>\n<\/ul>\n\n\n\n<ul>\n<li><strong>NullPointerExceptionDemo<\/strong>  <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7a7a\u6307\u9488\u5f02\u5e38<\/mark><\/strong><br>\u5f53\u5f15\u7528\u6570\u636e\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u88ab\u8d4b\u503c\u4e3anull\u4e4b\u540e\uff0c\u5c31\u4ee3\u8868\u548c\u5806\u5185\u5b58\u7684\u8fde\u63a5\u5207\u65ad\u4e86<br>\u8fd9\u4e2a\u65f6\u5019\u8fd8\u60f3\u53bb\u8bbf\u95ee\u5806\u5185\u5b58\uff0c\u5c31\u4f1a\u51fa\u73b0\u7a7a\u6307\u9488\u5f02\u5e38<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc-72\">8.7 \u4e8c\u7ef4\u6570\u7ec4\u7684\u4ecb\u7ecd<\/h2>\n\n\n\n<p><strong>\u4e8c\u7ef4\u6570\u7ec4<\/strong>\u662f\u4e00\u79cd\u5bb9\u5668\uff0c\u8be5\u5bb9\u5668\u7528\u4e8e\u50a8\u5b58\u4e00\u7ef4\u6570\u7ec4\uff08\u4e8c\u7ef4\u6570\u7ec4\u5c31\u662f\u6570\u7ec4\u7684\u5d4c\u5957\uff09<\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a\u8981\u7ed9\u4e00\u4e2a\u9500\u552e\u90e8\u95e8\u7684\u4e1a\u7ee9\u8fdb\u884c\u5206\u7c7b\u5b58\u50a8\u4e3a\u6570\u7ec4<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"751\" height=\"446\" src=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/12\/image.png\" alt=\"\" class=\"wp-image-1639\" style=\"width:327px;height:auto\" srcset=\"http:\/\/ericw.top\/wp-content\/uploads\/2024\/12\/image.png 751w, http:\/\/ericw.top\/wp-content\/uploads\/2024\/12\/image-300x178.png 300w\" sizes=\"(max-width: 751px) 100vw, 751px\" \/><\/figure>\n\n\n\n<p>\u5982\u679c\u5199\u4e00\u4e2a\u6570\u7ec4: <code class=\"prettyprint\" >int[] arr = {22,66,44,77,33,88,25,45,65,11,66,99};<\/code>  <br>\u8fd9\u6837\u4e66\u5199\u4e0d\u4fbf\u4e8e\u7ba1\u7406\uff0c\u9700\u8981\u8ba4\u4e3a\u5206\u522b\u51fa\u6bcf\u4e2a\u5b63\u5ea6\u7684\u6570\u636e<\/p>\n\n\n\n<p>\u6240\u4ee5\u6211\u4eec\u628a\u4ed6\u5206\u4e3a\u56db\u4e2a\u6570\u7ec4\u6765\u5b58\u50a8\u3002\u518d\u7531\u4e00\u4e2a\u5927\u6570\u7ec4\u6765\u8fdb\u884c\u5d4c\u5957\u5b58\u50a8<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-green-cyan-color\">\u4eca\u540e\u82e5\u8981\u64cd\u4f5c\u7684<strong>\u591a\u7ec4<\/strong>\u6570\u636e\uff0c\u5c5e\u4e8e\u540c\u4e00\u79cd\u6570\u636e<br>\u5c31\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u4e8c\u7ef4\u6570\u7ec4\u8fdb\u884c\u7ef4\u62a4<\/mark><\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-73\">8.7.1 \u4e8c\u7ef4\u6570\u7ec4\u7684\u9759\u6001\u521d\u59cb\u5316<\/h3>\n\n\n\n<p><strong>\u5b8c\u6574\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\u6570\u636e\u7c7b\u578b&#091;]&#091;] \u6570\u636e\u540d = new \u6570\u636e\u7c7b\u578b&#091;]&#091;] {{\u5143\u7d201,\u5143\u7d202}{\u5143\u7d201,\u5143\u7d202}};\n\nint&#091;]&#091;] arr = new int&#091;]&#091;] {{1,2,3}{4,5,6}};<\/code><\/pre>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7b80\u5316\u683c\u5f0f\uff1a<\/mark><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\u6570\u636e\u7c7b\u578b&#091;]&#091;] \u6570\u636e\u540d = new int&#091;]&#091;] {{\u5143\u7d201,\u5143\u7d202}{\u5143\u7d201,\u5143\u7d202}};\n\nint &#091;]&#091;] arr = {{11,22}{33,44}};<\/code><\/pre>\n\n\n\n<p>\u6570\u7ec4\u7684\u8bbf\u95ee\u683c\u5f0f\uff08\u8c03\u7528\u683c\u5f0f\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >System.out.println(arr&#091;0]&#091;0])<\/code><\/pre>\n\n\n\n<p>\u4e8c\u7ef4\u6570\u7ec4\u5728\u5b58\u50a8\u4e00\u7ef4\u6570\u7ec4\uff0c\u5b58\u50a8\u7684\u662f\u4e00\u7ef4\u6570\u7ec4\u7684\u5730\u5740\u503c<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-74\">8.7.2 \u4e8c\u7ef4\u6570\u7ec4\u7684\u904d\u5386<\/h3>\n\n\n\n<p>\u4e8c\u7ef4\u6570\u7ec4\u5c31\u662f<strong>\u6570\u7ec4\u5d4c\u5957<\/strong>\uff0c\u90a3\u904d\u5386\u4e8c\u7ef4\u6570\u7ec4\u9700\u8981<strong>\u5d4c\u5957\u5faa\u73af<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\/\/ \u904d\u5386\u4e8c\u7ef4\u6570\u7ec4\npublic static void printArray(){\n    int&#091;]&#091;] arr = {\n        {11,22,33},\n        {33,44,55}\n    }\n}\n\nfor(int i = 0;i &lt; arr.length; i++){\n\/\/ arr&#091;i]  \u904d\u5386\u6bcf\u4e00\u4e2a\u4e00\u7ef4\u6570\u7ec4\n\/\/ \u904d\u5386\u4e00\u7ef4\u6570\u7ec4\uff0c\u83b7\u53d6\u5185\u90e8\u7684\u5143\u7d20\n    for(int j = 0;j &lt; arr&#091;i].length; j++){\n        System.out.println(temp&#091;i]&#091;j]);\n    }\n} <\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"toc-75\">8.7.3 \u4e8c\u7ef4\u6570\u7ec4\u7684\u52a8\u6001\u521d\u59cb\u5316<\/h3>\n\n\n\n<p><strong>\u683c\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\u6570\u636e\u7c7b\u578b&#091;]&#091;] \u6570\u7ec4\u540d = new \u6570\u636e\u7c7b\u578b&#091;m]&#091;n];\nint&#091;]&#091;] arr = new int&#091;2]&#091;3];<\/code><\/pre>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">m\u8868\u793a\u8fd9\u4e2a\u4e8c\u7ef4\u6570\u7ec4\uff0c\u53ef\u4ee5\u5b58\u653e\u591a\u5c11\u4e2a\u4e00\u7ef4\u6570\u7ec4<\/mark><\/strong><\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">n\u8868\u793a\u6bcf\u4e2a\u4e00\u7ef4\u6570\u7ec4\uff0c\u53ef\u4ee5\u5b58\u653e\u591a\u5c11\u4e2a\u5143\u7d20<\/mark><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u8ba1\u7b97\u673a\u57fa\u7840\u77e5\u8bc6 \u5728JAVA\u6b63\u5f0f\u5f00\u59cb\u4e4b\u524d\uff0c\u6211\u4eec\u9996\u5148\u4e86\u89e3\u4e00\u4e0b\u8ba1\u7b97\u673a\u77e5\u8bc6 \u8ba1\u7b97\u673a\u5c31\u662f \u7535\u8111 1.1 \u8ba1\u7b97\u673a\u7684\u7531\u6765 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1335,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"_links":{"self":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/1334"}],"collection":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1334"}],"version-history":[{"count":212,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/1334\/revisions"}],"predecessor-version":[{"id":1681,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/1334\/revisions\/1681"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/media\/1335"}],"wp:attachment":[{"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1334"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}