{"id":31121,"date":"2023-05-10T03:54:38","date_gmt":"2023-07-19T15:38:25","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e9%a6%96%e6%ac%a1%e5%ad%a6%e4%b9%a0java%ef%bc%9a%e7%ac%ac%e4%b8%80%e9%83%a8%e5%88%86-%e4%bb%80%e4%b9%88%e6%98%afjava%ef%bc%9f%e4%bb%8e%e5%9f%ba%e7%a1%80%e5%8f%98%e9%87%8f\/"},"modified":"2025-08-12T22:26:21","modified_gmt":"2025-08-12T14:26:21","slug":"%e3%80%90java%e3%80%91%e9%a6%96%e6%ac%a1%e5%ad%a6%e4%b9%a0java%ef%bc%9a%e7%ac%ac%e4%b8%80%e9%83%a8%e5%88%86-%e4%bb%80%e4%b9%88%e6%98%afjava%ef%bc%9f%e4%bb%8e%e5%9f%ba%e7%a1%80%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e9%a6%96%e6%ac%a1%e5%ad%a6%e4%b9%a0java%ef%bc%9a%e7%ac%ac%e4%b8%80%e9%83%a8%e5%88%86-%e4%bb%80%e4%b9%88%e6%98%afjava%ef%bc%9f%e4%bb%8e%e5%9f%ba%e7%a1%80%e5%8f%98%e9%87%8f\/","title":{"rendered":"\u3010Java\u3011\u9996\u6b21\u5b66\u4e60Java\uff1a\u7b2c\u4e00\u90e8\u5206 \u4ec0\u4e48\u662fJava\uff1f\u4ece\u57fa\u7840\u53d8\u91cf\u5f00\u59cb\uff08\u57fa\u7840\u00b7\u4ee3\u7801\uff09"},"content":{"rendered":"<h1>\u4e00\u5f00\u59cb\u6211\u4f1a\u5199\u51fa\u6211\u81ea\u5b66\u7684\u5185\u5bb9\u3002\u57fa\u672c\u4e0a\u662f\u6211\u81ea\u5df1\u80fd\u7406\u89e3\u7684\u5185\u5bb9\uff0c\u8bf7\u89c1\u8c05\u3002\u5982\u679c\u6709\u9519\u8bef\uff0c\u8bf7\u5728\u8bc4\u8bba\u4e2d\u6307\u51fa\u3002<\/p>\n<p>\u6709\u5e26\u6709\u201c\u8981\u786e\u8ba4\u201d\u6807\u8bb0\u7684\uff0c\u5e94\u8be5\u662f\u9700\u8981\u5728\u6267\u884c\u4e4b\u524d\u4e00\u5b9a\u8981\u641c\u7d22\u4e00\u4e0b\u7684\u5185\u5bb9\u3002<\/p>\n<h1>\u26a0\ufe0f\u672c\u6b21\u53d1\u5e03\u7684\u662f\u504f\u5411\u8f93\u5165\u65b9\u9762\u7684\u6587\u7ae0\u26a0\ufe0f\u8fd9\u6b21\u6211\u5c06\u603b\u7ed3\u5728\u5916\u90e8\u7f51\u7ad9&#8221;Progate&#8221;\u4e0a\u5b66\u4e60\u7684\u5185\u5bb9\u3002<\/p>\n<h1>\u6307\u6570 (zh\u01d0 sh\u00f9)<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Java\u3063\u3066\u306a\u3093\u305e<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u8a66\u3057\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u307f\u305f<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30c7\u30fc\u30bf\u578b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Java\u3067\u306e\u5909\u6570<\/ul>\n<h1>Java\u662f\u4ec0\u4e48\u4e1c\u897f\u4e16\u754c\u4e0a\u6709\u8bb8\u591a\u77e5\u540d\u8bed\u8a00\u4e4b\u4e00\uff0c\u88ab\u4f17\u591a\u5f00\u53d1\u8005\u4f7f\u7528\uff01Java\u5728\u5927\u578b\u7cfb\u7edf\u3001Web\u5e94\u7528\u7a0b\u5e8f\u3001\u667a\u80fd\u624b\u673a\u5e94\u7528\u7b49\u5404\u4e2a\u9886\u57df\u90fd\u5f97\u5230\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n<p>\u7136\u540e&#8230;<br \/>\n\u26a0\ufe0fJava\u548cJavaScript\u5b8c\u5168\u65e0\u5173\u26a0\ufe0f<\/p>\n<h1>\u6211\u8bd5\u7740\u5199\u4e86\u4e00\u6bb5\u4ee3\u7801\u3002<\/p>\n<h4>\u6211\u60f3\u505a\u7684\u4e8b\u60c5\uff1a\u60f3\u8981\u5c06&#8221;\u5b57\u7b26\u4e32&#8221;\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u306b\u30af\u30e9\u30b9\u3092\u8a18\u8ff0<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u306b\u30e1\u30be\u30c3\u30c8\u3092\u8a18\u8ff0<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Hello,World!\"<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u306b\u51e6\u7406\u3092\u8a18\u8ff0<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6587\u5b57\u5217\u306f\u300c&#8221;\uff08\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\uff09\u300d\u3067\u56f2\u3093\u3067\u3042\u3052\u308b\u3002<\/p>\n<p>\u300c;\uff08\u30bb\u30df\u30b3\u30ed\u30f3\uff09\u300d\u306f\u5fd8\u308c\u304c\u3061\u306b\u306a\u308b\uff01<br \/>\nSystem.out.println()\u3068\u3044\u3046\u306e\u306f\u3001\u300c()\u306e\u4e2d\u8eab\u3092\u51fa\u529b\uff08\u8868\u793a\uff09\u305b\u3088\u300d\u3068\u3044\u3046\u300c\u547d\u4ee4\u300d<\/p>\n<p>print\u300cl\u300dn\u306f\u5c0f\u6587\u5b57\u306e\u30a8\u30eb\u3060\u305e<\/p>\n<p>\u30af\u30e9\u30b9\uff1e\u30e1\u30be\u30c3\u30c8\uff1e\u51e6\u7406\u306e\u69cb\u6210\u3067\u8a18\u8ff0\u3059\u308b\u3088\u3046\u3060<\/p>\n<h2>\u5b57\u7b26\u4e32\u62fc\u63a5<\/p>\n<h4>\u6211\u60f3\u505a\u7684\u4e8b\u60c5\u662f\uff0c\u5c06&#8221;\u5b57\u7b26\u4e32&#8221;\u8fde\u63a5\u5e76\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u4e0a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Hello\"<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"World!\"<\/span><span class=\"o\">);<\/span>\r\n\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"5\"<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"3\"<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/\u7d50\u679c\uff1a53<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u5f8c\u8ff0\u306e\u300c\u6570\u5024\u300d\u3068\u300c\u6587\u5b57\u5217\u300d\u306e\u9055\u3044\u3092\u30a4\u30e1\u30fc\u30b8\u3059\u308b\u3068\u826f\u3044\uff01<\/ul>\n<h2>\u6570\u503c\uff08\u56db\u5219\u8fd0\u7b97\uff09<\/p>\n<h4>\u5e0c\u671b\u5b9e\u73b0\u7684\u4e8b\u60c5\u662f\u5c06\u300c\u6570\u503c\u300d\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u306b\u30af\u30e9\u30b9\u3092\u8a18\u8ff0<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u306b\u30e1\u30be\u30c3\u30c8\u3092\u8a18\u8ff0<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u306b\u51e6\u7406\u3092\u8a18\u8ff0<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">2<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mi\">5<\/span> <span class=\"o\">-<\/span> <span class=\"mi\">2<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6570\u5024\u306f\u305d\u306e\u307e\u307e\u3067OK\u3002<br \/>\n\u56db\u5247\u6f14\u7b97\u3082\u3067\u304d\u3061\u3083\u3046\uff01<br \/>\n\u4eca\u56de\u306e\u8a18\u8ff0\u3060\u3068\u3001\u5168\u3066\u300c3\u300d\u3060\u304c\u51e6\u7406\u5185\u5bb9\u304c\u9055\u3046\u305e\u3002<\/p>\n<h4>\u60f3\u505a\u7684\u4e8b\u60c5\uff1a\u60f3\u8981\u8f93\u51fa\u5404\u79cd\u8ba1\u7b97\u7ed3\u679c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u306b\u30af\u30e9\u30b9\u3092\u8a18\u8ff0<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u306b\u30e1\u30be\u30c3\u30c8\u3092\u8a18\u8ff0<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mi\">5<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">2<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a10<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mi\">6<\/span> <span class=\"o\">\/<\/span> <span class=\"mi\">2<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a3<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mi\">8<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">5<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a3<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u300c*\u300d\u306f\u639b\u3051\u7b97\u3001\u300c\/\u300d\u306f\u5272\u308a\u7b97<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u300c%\u300d\u306f\u5272\u308a\u7b97\u306e\u4f59\u308a\u3092\u8a08\u7b97\u3067\u304d\u308b\u305e\uff01\uff08\u4eca\u56de\u306e\u5834\u5408\u306f\u300c1\u4f59\u308a3\u300d\u306a\u306e\u3067\u51fa\u529b\u306f\u300c3\u300d\u3068\u306a\u308b\uff09<\/ul>\n<\/li>\n<\/ul>\n<p>\u56db\u5247\u6f14\u7b97\u51e6\u7406\u3092\u898b\u3084\u3059\u304f\u3059\u308b\u70ba\u306b\u3001\u534a\u89d2\u30b9\u30da\u30fc\u30b9\u3092\u5165\u308c\u308b\u3068\u826f\u304d\u266a<\/p>\n<h2>\u7406\u89e3\u6587\u5b57\u548c\u6570\u503c\u7684\u533a\u522b\u7684\u4f8b\u5b50\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a3<\/span>\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"1 + 2\"<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a1 + 2<\/span>\r\n<\/code><\/pre>\n<h1>\u6570\u636e\u7c7b\u578b<\/p>\n<h2>String\u7c7b\u578b\u548cint\uff08\u6574\u6570\uff09\u7c7b\u578b\u5728\u4f7f\u7528Ruby on Rails\u8fdb\u884c\u5f00\u53d1\u65f6\uff0c\u6211\u4e5f\u975e\u5e38\u611f\u8c22\u5728\u8bbe\u8ba1\u6570\u636e\u5e93\u8868\u65f6\u5bf9String\u7c7b\u578b\u548cint\uff08\u6574\u6570\uff09\u7c7b\u578b\u6240\u63d0\u4f9b\u7684\u5e2e\u52a9\u3002<\/p>\n<div>\n<div class=\"post-table\">String\u578bint\u578b&#8221;Hello,World&#8221;\uff08\u6587\u5b57\u5217\uff093\uff08\u6574\u6570\uff09&#8221;\u30a4\u30ed\u30cf&#8221;1995<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">String\u578b<\/ul>\n<\/li>\n<\/ul>\n<p>\u6587\u5b57\u306e\u4e26\u3073<\/p>\n<p>int(integer)\u578b<\/p>\n<p>\u6574\u6570<br \/>\n\uff08i\u306f\u5c0f\u6587\u5b57\uff09<\/p>\n<p>\u660e\u5929\uff0c\u6211\u8ba1\u5212\u53d1\u5e03\u4e00\u7bc7\u6574\u7406\u4e86\u5404\u79cd\u6570\u636e\u7c7b\u578b\u7684\u6587\u7ae0\u3002<\/p>\n<h1>\u5728Java\u4e2d\u7684\u53d8\u91cf\u4e3a\u4e86\u65b9\u4fbf\u6570\u636e\u4ea4\u4e92\uff0c\u53ef\u4ee5\u5b9a\u4e49\u7c7b\u4f3c\u6587\u4ef6\u76d2\u6216\u540d\u724c\u7684\u4e1c\u897f\u3002\u5982\u679c\u65b9\u4fbf\u7684\u8bdd\uff0c\u8bf7\u9605\u8bfb\u4f5c\u8005\u4ee5\u524d\u7684\u5e16\u5b50\uff0c\u63d0\u4f9b\u4e86\u6709\u5173Ruby\u7684\u7b80\u5355\u8bf4\u660e\uff01\u5173\u4e8eRuby\uff08\u57fa\u7840\u5185\u5bb9\uff09\uff0c<\/p>\n<h4>\u5e0c\u671b\u505a\u7684\u4e8b\u60c5\uff1a\u5728Java\u4e2d\u5b9a\u4e49\u53d8\u91cf\uff0c\u5e76\u4e14\u60f3\u8981\u4ece\u5b9a\u4e49\u7684\u53d8\u91cf\u4e2d\u53d6\u503c\u3002\u2460\u6307\u5b9a\u6570\u636e\u7c7b\u578b\u4ee5\u5b58\u653e\u53d8\u91cf\u7684\u503c\u3002<br \/>\n\u2461\u6307\u5b9a\u53d8\u91cf\u7684\u540d\u79f0\u3002<br \/>\n\u2462\u8fdb\u884c\u503c\u7684\u8d4b\u503c\u64cd\u4f5c\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0af237434c4406be5247\/37-0.png\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2020-03-16 17.28.14.png\" \/>\u300c=\u300d\u4e0d\u4ee3\u8868\u300c\u7b49\u4e8e\u300d\uff01<\/p>\n<p>\u53ea\u9700\u8981\u4ece\u53d8\u91cf\u4e2d\u63d0\u53d6\u503c\u5c31\u53ef\u4ee5\u4e86\uff01<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">a<\/span><span class=\"o\">;<\/span> <span class=\"c1\">\/\/ \u6574\u6570\u3068\u3057\u3066\u300ca\u300d\u306e\u540d\u672d\u304c\u3064\u3044\u305f\u7bb1\u3092\u7528\u610f<\/span>\r\n    <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"o\">;<\/span> <span class=\"c1\">\/\/ \u305d\u306e\u7bb1\u306b\u300c10\u300d\u3092\u4ee3\u5165<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a10<\/span>\r\n\r\n    <span class=\"nc\">String<\/span> <span class=\"n\">b<\/span><span class=\"o\">;<\/span> <span class=\"c1\">\/\/ \u6574\u6570\u3068\u3057\u3066\u300cb\u300d\u306e\u540d\u672d\u304c\u3064\u3044\u305f\u7bb1\u3092\u7528\u610f<\/span>\r\n    <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"hello,world!\"<\/span> <span class=\"c1\">\/\/ \u305d\u306e\u7bb1\u306b\u300c\"hello,world!\"\u300d\u3092\u4ee3\u5165<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">b<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a\"hello,world!\"<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u60f3\u505a\u7684\u4e8b\u60c5\uff1a\u5c1d\u8bd5\u5bf9\u53d8\u91cf\u8fdb\u884c\u521d\u59cb\u5316\u3002<br \/>\n\u53ef\u4ee5\u4e00\u884c\u4ee3\u7801\u5b9a\u4e49\u5e76\u521d\u59cb\u5316\u53d8\u91cf\uff01\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\u5c1d\u8bd5\u521d\u59cb\u5316\u53d8\u91cf\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"o\">;<\/span> <span class=\"c1\">\/\/ \u5909\u6570\u306e\u521d\u671f\u5316<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a10<\/span>\r\n\r\n    <span class=\"nc\">String<\/span> <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"hello,world!\"<\/span> <span class=\"c1\">\/\/ \u5909\u6570\u306e\u521d\u671f\u5316<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">b<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a\"hello,world!\"<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u2728\u89c2\u770b\u65f6\u5e26\u6765\u6109\u60a6\u611f\u7684\u4ee3\u7801\u2728<\/p>\n<h4>\u6211\u60f3\u505a\u7684\u4e8b\u60c5\u662f\u201c\u6574\u6570\u7c7b\u578b\u7684\u8ba1\u7b97\u201d\u548c\u201c\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u8fde\u63a5\u201d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"c1\">\/\/ \u5909\u6570\u3092\u7528\u3044\u305fint\u578b\u306e\u8a08\u7b97<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">hoge1<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hoge1<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">200<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a300<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">hoge2<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hoge1<\/span> <span class=\"o\">+<\/span> <span class=\"n\">hoge2<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a110<\/span>\r\n\r\n\r\n    <span class=\"c1\">\/\/ \u5909\u6570\u3092\u7528\u3044\u305fString\u578b\u306e\u9023\u7d50<\/span>\r\n    <span class=\"nc\">String<\/span> <span class=\"n\">hello<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u3053\u3093\u306b\u3061\u306f\uff01\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hello<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"hoge1\"<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a\u3053\u3093\u306b\u3061\u306f\uff01hoge1<\/span>\r\n\r\n    <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"hoge2\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hello<\/span> <span class=\"o\">+<\/span> <span class=\"n\">name<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a\u3053\u3093\u306b\u3061\u306f\uff01hoge2<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u53d8\u91cf\u7684\u8986\u76d6\u53ca\u6ce8\u610f\u4e8b\u9879\u5728\u5185\u90e8\u66f4\u65b0\u503c\u662f\u53ef\u80fd\u7684\uff08\u8986\u76d6\uff09\u3002<br \/>\n\u7136\u800c\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u201c\u5728\u540c\u4e00\u5904\u7406\u5185\u65e0\u6cd5\u5b9a\u4e49\u76f8\u540c\u540d\u79f0\u7684\u53d8\u91cf\u201d\u3002<\/p>\n<h4>\u60f3\u505a\u7684\u4e8b\u60c5\uff1a\u53d8\u91cf\u7684\u8986\u76d6\u548c\u4ea7\u751f\u9519\u8bef\u7684\u8bed\u53e5\u3002<br \/>\n\u5728\u8c03\u7528String\u7c7b\u578b\u7684\u53d8\u91cf\u65f6\uff0c\u4e0d\u9700\u8981\u5728\u53d8\u91cf\u540d\u4e2d\u52a0\u4e0a\u53cc\u5f15\u53f7\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"c1\">\/\/ \u5909\u6570\u3092\u7528\u3044\u305fint\u578b\u306e\u8a08\u7b97<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">hoge1<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">100<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hoge1<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">200<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a300<\/span>\r\n\r\n    <span class=\"n\">hoge1<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">400<\/span><span class=\"o\">;<\/span> <span class=\"c1\">\/\/ \u4e0a\u66f8\u304d<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hoge1<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">200<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a600<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">hoge1<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">700<\/span><span class=\"o\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c\u3092900\u306b\u3057\u305f\u3044\u304c\u300cint\u300d\u3092\u8a18\u8ff0<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hoge1<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">200<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a\u540c\u3058\u51e6\u7406\u5185\u3067\u540c\u4e00\u540d\u306e\u5909\u6570\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u306e\u3067\u30a8\u30e9\u30fc\u304c\u51fa\u308b<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\u662f\u4e00\u4e2a\u4e0d\u8d77\u773c\u7684\u8981\u70b9<br \/>\n\u4ee3\u7801\u57fa\u672c\u4e0a\u662f\u4ece\u4e0a\u5230\u4e0b\u5904\u7406\u7684\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">number<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">String<\/span> <span class=\"n\">text<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"Ruby\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">number<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u3067\u4e00\u5ea6\u300c10\u300d\u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">text<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u3053\u3053\u3067\u4e00\u5ea6\u300cRuby\u300d\u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n\r\n    <span class=\"n\">number<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"n\">text<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"Java\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">number<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u4e0a\u66f8\u304d\u3055\u308c\u305f\u300c5\u300d\u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">text<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u4e0a\u66f8\u304d\u3055\u308c\u305f\u300cJava\u300d\u304c\u51fa\u529b\u3055\u308c\u308b<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code><span class=\"go\">10\r\nRuby\r\n5\r\nJava\r\n<\/span><\/code><\/pre>\n<h2>\u5c06\u81ea\u5df1\u7f6e\u8eab\u5176\u4e2d<\/p>\n<h4>\u5e0c\u671b\u7684\u64cd\u4f5c\uff1a\u5f53\u53d8\u91cfx\u7b49\u4e8e10\u65f6\uff0c\u5e0c\u671b\u5c06\u5176\u52a040\u5e76\u8986\u76d6\u539f\u6709\u7684\u53d8\u91cfx\u3002<br \/>\n&#8220;\u5c06\u4ee3\u5165\u7b26\u53f7\u7684\u201c=\u201d\u7406\u89e3\u4e3a\u76f8\u7b49\u662f\u4e00\u4e2a\u91cd\u70b9\uff01&#8221;<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">number<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">number<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a10<\/span>\r\n\r\n    <span class=\"n\">number<\/span> <span class=\"o\">=<\/span> <span class=\"n\">number<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">40<\/span><span class=\"o\">;<\/span><span class=\"err\">\u3000<\/span><span class=\"c1\">\/\/ number = 10\u306b40\u3092\u8db3\u3057\u3066\u3001number\u3092\u4e0a\u66f8\u304d<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">number<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a50<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8bd5\u56fe\u7701\u7565\u4e0a\u8ff0\u63cf\u8ff0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">number<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">number<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a10<\/span>\r\n\r\n    <span class=\"n\">number<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">40<\/span><span class=\"o\">;<\/span><span class=\"err\">\u3000<\/span><span class=\"c1\">\/\/ \u7701\u7565\u8a18\u8ff0<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">number<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a50<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u60f3\u505a\u7684\u4e8b\u60c5\uff1a\u81ea\u6211\u8d4b\u503c\u7684\u7701\u7565\u63cf\u8ff0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kt\">int<\/span> <span class=\"n\">number<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"n\">number<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">40<\/span><span class=\"o\">;<\/span>\r\n<span class=\"n\">number<\/span> <span class=\"o\">-=<\/span> <span class=\"mi\">40<\/span><span class=\"o\">;<\/span>\r\n<span class=\"n\">number<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">40<\/span><span class=\"o\">;<\/span>\r\n<span class=\"n\">number<\/span> <span class=\"o\">\/=<\/span> <span class=\"mi\">40<\/span><span class=\"o\">;<\/span>\r\n<span class=\"n\">number<\/span> <span class=\"o\">%=<\/span> <span class=\"mi\">40<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/\u5909\u6570\u306b\u300c1\u300d\u3092\u8db3\u3059\u3001\u3082\u3057\u304f\u306f\u300c1\u300d\u3092\u5f15\u304f\u5834\u5408\u306f\u3055\u3089\u306b\u7701\u7565\u3067\u304d\u308b<\/span>\r\n<span class=\"n\">number<\/span><span class=\"o\">++;<\/span>\r\n<span class=\"n\">number<\/span><span class=\"o\">--;<\/span>\r\n<\/code><\/pre>\n<h2>\uff08\u4ec5\u63d0\u4f9b\u4e00\u79cd\u9009\u9879\uff09<br \/>\nJava\u4e2d\u7684\u53d8\u91cf\u547d\u540d\u89c4\u5219\u3002\u53d8\u91cf\u540d\u79f0\u53ef\u4ee5\u81ea\u7531\u547d\u540d&#8230;\u4f46\u662f\uff01\uff01\uff01\u5fc5\u987b\u9075\u5faa\u4e00\u5b9a\u7684\u89c4\u5219\u548c\u539f\u5219\u3002<\/p>\n<p>\u597d\u7684? de? )<\/p>\n<div>\n<div class=\"post-table\">\u4f8b\u7406\u7531date\u82f1\u5358\u8a9e\u3092\u7528\u3044\u3066\u3044\u308buserName2\u8a9e\u4ee5\u4e0a\u306e\u5834\u5408\u306f\u5927\u6587\u5b57\u3067\u533a\u5207\u308b(\u30ad\u30e3\u30e1\u30eb\u30b1\u30fc\u30b9)\u7cdf\u7cd5? ?)<\/p>\n<div>\n<div class=\"post-table\">\u4f8b\u7406\u75311name<strong>\u6570\u5b57\u958b\u59cb\u306f\u30a8\u30e9\u30fc<\/strong>\u304c\u51fa\u308b\u305euser_name<strong>\u30a2\u30f3\u30c0\u30fc\u30d0\u30fc\u306f\u671b\u307e\u3057\u304f\u306a\u3044<\/strong>(\u30b9\u30cd\u30fc\u30af\u30b1\u30fc\u30b9)ohisama<strong>\u30ed\u30fc\u30de\u5b57<\/strong>\u3082\u308f\u304b\u308a\u306b\u304f\u3044\u306e\u3067\u826f\u304f\u306a\u3044\u540d\u524d\u65e5\u672c\u8a9e\u306f\u3088\u308d\u3057\u304f\u306a\u3044\uff08\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306f\u65e5\u672c\u8a9e\u826f\u304f\u306a\u3044\u305e&#8230;\uff09\u7ed9\u51fa\u7b80\u6d01\u6613\u61c2\u7684\u53d8\u91cf\u540d\uff0c\u8ba9\u4efb\u4f55\u4eba\u90fd\u80fd\u660e\u767d\uff01\u5982\u679c\u5728\u547d\u540d\u4e0a\u72af\u6101\uff0c\u8bf7\u53c2\u8003\u4e0b\u9762\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u300a\u6cd5\u89c4\u300b<\/p>\n<p>Note: &#8220;Codic&#8221; is a Latin word that means &#8220;law&#8221; or &#8220;regulation.&#8221; In Chinese, it can be translated as &#8220;\u6cd5\u89c4&#8221; which directly refers to laws and regulations.<\/p>\n<h2>\u5173\u4e8e\u5c0f\u6570\u70b9<\/p>\n<h4>\u6211\u60f3\u8981\u505a\u7684\u4e8b\u60c5\u662f\u5c1d\u8bd5\u4f7f\u7528\u5c0f\u6570\u70b9\u8fdb\u884c\u8ba1\u7b97\u3002<br \/>\n\u5c0f\u6570\u70b9\u6570\u636e\u7c7b\u578b\u662f&#8221;double\u7c7b\u578b&#8221;\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kt\">double<\/span> <span class=\"n\">number1<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">10.0<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kt\">double<\/span> <span class=\"n\">number2<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">3.3<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">number1<\/span> <span class=\"o\">+<\/span> <span class=\"n\">number2<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a13.3<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">number1<\/span> <span class=\"o\">-<\/span> <span class=\"n\">number2<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a6.7<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u6211\u7684\u613f\u671b\u662f\u4f7f\u7528\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\u6765\u8fdb\u884c\u6574\u6570\u548c\u5c0f\u6570\u70b9\u7684\u8ba1\u7b97\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mi\">5<\/span> <span class=\"o\">\/<\/span> <span class=\"mf\">2.0<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a2.5<\/span>\r\n\r\n    <span class=\"c1\">\/\/\u56e0\u307f\u306b<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mi\">5<\/span> <span class=\"o\">\/<\/span> <span class=\"mi\">2<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a2<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"mf\">5.0<\/span> <span class=\"o\">\/<\/span> <span class=\"mf\">2.0<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a2.5<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u300c+\u300d\u306a\u3069\u306e\u64cd\u4f5c\u306f\u3001\u672c\u6765\u3067\u3042\u308c\u3070\u540c\u3058\u30c7\u30fc\u30bf\u578b\u540c\u58eb\u3067\u306a\u3044\u3068\u3067\u304d\u306a\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u300c\u81ea\u52d5\u578b\u5909\u63db\u300d\u3067\u5bfe\u5fdc\u3057\u3066\u307f\u308b\u3002\uff08\u624b\u52d5\u3082\u3042\u308b\u3088\u3046\u3060\uff09<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u56e0\u307f\u306b\u300cString\u578b\u300d\u3068\u300cint\u578b\u300d\u3067\u300c+\u300d\u3059\u308b\u3068\u3001String\u578b\u3067\u51fa\u529b\u3055\u308c\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>\u3053\u306e\u3053\u3068\u304b\u3089\u3001\u5024\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u8868\u73fe\u3067\u304d\u308b\u30c7\u30fc\u30bf\u578b\u306b\u81ea\u52d5\u5909\u63db\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308b\uff01\uff01<\/p>\n<p>\u6574\u6570\u306e\u300c5\u300d\u306f\u3001\u6587\u5b57\u5217\u3067\u3082&#8221;5&#8243;\u306e\u8868\u73fe\u304c\u3067\u304d\u308b\u3057\u3001\u5c0f\u6570\u70b9\u3067\u30825.0\u306e\u8868\u73fe\u304c\u3067\u304d\u308b\u304b\u3089\u3002<\/p>\n<p>\u307e\u305f\u3001int\u578b\u306e\u8a08\u7b97\u7d50\u679c\u3068double\u578b\u306e\u8a08\u7b97\u7d50\u679c\u3067\u5909\u5316\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u6ce8\u610f\u3057\u305f\u65b9\u304c\u826f\u3044\u305e\u3002<\/p>\n<h4>\u5e0c\u671b\u505a\u7684\u4e8b\u60c5\uff1a\u60f3\u8981\u4f7f\u7528\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u6765\u8fdb\u884c\u6574\u6570\u548c\u5c0f\u6570\u70b9\u7684\u8ba1\u7b97\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">13<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">4<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">x<\/span> <span class=\"o\">\/<\/span> <span class=\"n\">y<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a3\uff083.25\u3067\u306f\u306a\u3044\uff09<\/span>\r\n\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">((<\/span><span class=\"kt\">double<\/span><span class=\"o\">)<\/span><span class=\"n\">x<\/span> <span class=\"o\">\/<\/span> <span class=\"n\">y<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ \u7d50\u679c\uff1a3.25<\/span>\r\n\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u5909\u6570x\u306eint\u578b\u3092\u300cdouble\u578b\u300d\u306b\u5f37\u5236\u5909\u63db\u3055\u305b\u305f\u306e\u3067\u3001\u81ea\u52d5\u578b\u5909\u63db\u304c\u767a\u706b\u3057\u3066\u3001\u5909\u6570y\u3082\u300cdouble\u578b\u300d\u306b\u306a\u3063\u305f\u305e\uff01\uff01<\/ul>\n<h1>\u5982\u679c\u6709\u8ffd\u52a0\u7684\u8bdd\uff0c\u6211\u4f1a\u4e0d\u65ad\u66f4\u65b0\u3002 \u0101r\u00e8, .)\u4f5c\u4e3a\u4e00\u4e2a\u65b0\u624b\uff0c\u6211\u4f1a\u52aa\u529b\u594b\u6597\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u5f00\u59cb\u6211\u4f1a\u5199\u51fa\u6211\u81ea\u5b66\u7684\u5185\u5bb9\u3002\u57fa\u672c\u4e0a\u662f\u6211\u81ea\u5df1\u80fd\u7406\u89e3\u7684\u5185\u5bb9\uff0c\u8bf7\u89c1\u8c05\u3002\u5982\u679c\u6709\u9519\u8bef\uff0c\u8bf7\u5728\u8bc4\u8bba\u4e2d\u6307\u51fa\u3002 \u6709\u5e26\u6709\u201c\u8981\u786e\u8ba4\u201d [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31121","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010Java\u3011\u9996\u6b21\u5b66\u4e60Java\uff1a\u7b2c\u4e00\u90e8\u5206 \u4ec0\u4e48\u662fJava\uff1f\u4ece\u57fa\u7840\u53d8\u91cf\u5f00\u59cb\uff08\u57fa\u7840\u00b7\u4ee3\u7801\uff09 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010Java\u3011\u9996\u6b21\u5b66\u4e60Java\uff1a\u7b2c\u4e00\u90e8\u5206 \u4ec0\u4e48\u662fJava\uff1f\u4ece\u57fa\u7840\u53d8\u91cf\u5f00\u59cb\uff08\u57fa\u7840\u00b7\u4ee3\u7801\uff09\u7684\u6280\u672f\u6587\u7ae0\" 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