{"id":31349,"date":"2023-04-07T12:34:07","date_gmt":"2022-12-04T03:57:06","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e4%b8%ad%e7%9a%84%e5%8f%98%e9%87%8f%ef%bc%88%e5%a4%87%e5%bf%98%e5%bd%95%ef%bc%89\/"},"modified":"2025-08-12T23:34:58","modified_gmt":"2025-08-12T15:34:58","slug":"java%e4%b8%ad%e7%9a%84%e5%8f%98%e9%87%8f%ef%bc%88%e5%a4%87%e5%bf%98%e5%bd%95%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e4%b8%ad%e7%9a%84%e5%8f%98%e9%87%8f%ef%bc%88%e5%a4%87%e5%bf%98%e5%bd%95%ef%bc%89\/","title":{"rendered":"Java\u4e2d\u7684\u53d8\u91cf\uff08\u5907\u5fd8\u5f55\uff09"},"content":{"rendered":"<h1>\u7b80\u8981\u6982\u8ff0<\/h1>\n<ul class=\"post-ul\">Java\u3068Ruby\u3067\u306f\u5909\u6570\u306e\u6271\u3044\u65b9\u304c\u5927\u304d\u304f\u7570\u306a\u308a\u3001\u305d\u306e\u9055\u3044\u3084\u4f7f\u3044\u65b9\u3092\u899a\u3048\u3066\u304a\u304d\u305f\u3044\u3002<\/ul>\n<h1>\u4e3a\u4e86\u8fbe\u5230\u7684\u7ed3\u679c<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30c7\u30fc\u30bf\u578b\u306e\u7406\u89e3<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5909\u6570\u306e\u7406\u89e3<\/ul>\n<h1>\u7f16\u7a0b\u8bed\u8a00\u7684\u5206\u7c7b<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5909\u6570\u306e\u6271\u3044\u65b9\u306b\u3088\u308a\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306f\u5927\u304d\u304f\u3001\u300c\u52d5\u7684\u578b\u4ed8\u3051\u8a00\u8a9e\u300d\u3068\u300c\u9759\u7684\u578b\u4ed8\u3051\u8a00\u8a9e\u300d\u306e\uff12\u7a2e\u985e\u304c\u3042\u6d41\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Ruby\u306f\u300c\u52d5\u7684\u578b\u4ed8\u3051\u8a00\u8a9e\u300d\u3001Java\u306f\u300c\u9759\u7684\u578b\u4ed8\u3051\u8a00\u8a9e\u300d\u306e\u4ee3\u8868\u4f8b<\/ul>\n<h1>\u6570\u636e\u7c7b\u578b\u662f\u4ec0\u4e48\uff1f<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5909\u6570\u306b\u683c\u7d0d\u3059\u308b\u30c7\u30fc\u30bf\u306e\u7a2e\u985e\u306e\u3053\u3068\u3092\u30c7\u30fc\u30bf\u578b\u3068\u3044\u3046\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\">\u4f8b\u3048\u3070\u3001Ruby\u306e\u5834\u5408\u3001\u300c\u6570\u5024\u3068\u3057\u3066\u306e1\u300d\u3068\u300c\u6587\u5b57\u3068\u3057\u3066\u306e1\u300d\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4e0a\u3067\u306f\u7570\u306a\u308b\u3082\u306e\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30c7\u30fc\u30bf\u578b\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u300c\u6570\u5024\u300d\u3084\u300c\u6587\u5b57\u300d\u3068\u3044\u3063\u305f\u7a2e\u985e\u3092\u3088\u308a\u7d30\u304b\u304f\u5b9a\u3081\u305f\u3082\u306e\u3067\u3001Java\u306e\u57fa\u672c\u30c7\u30fc\u30bf\u578b\u306b\u306f8\u3064\u306e\u7a2e\u985e\u304c\u3042\u308b\u3002<\/ul>\n<h1>\u9700\u8981\u6570\u636e\u7c7b\u578b\u7684\u539f\u56e0<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30c7\u30fc\u30bf\u578b\u306f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u52b9\u7387\u3088\u304f\u4f7f\u3046\u305f\u3081\u306e\u4ed5\u7d44\u307f\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\">\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u5909\u6570\u306e\u5024\u306f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u5185\u306e\u300c\u30e1\u30e2\u30ea\u300d\u3068\u547c\u3070\u308c\u308b\u30d1\u30fc\u30c4\u306b\u4fdd\u5b58\u3055\u308c\u308b\u304c\u3001\u30c7\u30fc\u30bf\u578b\u304c\u3042\u308b\u3053\u3068\u3067\u3001\u3053\u306e\u30e1\u30e2\u30ea\u3092\u52b9\u7387\u3088\u304f\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\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\">\u30e1\u30e2\u30ea\u3068\u306f\u3001\u30a4\u30e1\u30fc\u30b8\u3067\u4f8b\u3048\u308b\u3068\u3001\u30c7\u30fc\u30bf\u3092\u5165\u308c\u308b\u305f\u3081\u306e\u7bb1\u304c\u9023\u7d9a\u3057\u3066\u4e26\u3093\u3067\u3044\u308b\u3082\u306e\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u7bb1\u306e\u4e2d\u306b\u3001\u6570\u5024\u3092\u5165\u308c\u3066\u4fdd\u5b58\u3057\u305f\u308a\u3001\u53d6\u308a\u51fa\u3057\u3066\u4f7f\u7528\u3059\u308b\u304c\u3001\u3053\u306e\u969b\u306e\u6570\u5024\u306f\u3001\u4eba\u9593\u304c\u666e\u6bb5\u4f7f\u3063\u3066\u3044\u308b\u300c10\u9032\u6570\u300d\u3067\u306f\u306a\u304f\u300c2\u9032\u6570\u300d\u306b\u5909\u63db\u3057\u3066\u304b\u3089\u6271\u308f\u308c\u308b(\u73fe\u5728\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3067\u306f\u3001\u6027\u8cea\u4e0a2\u9032\u6570\u3057\u304b\u6271\u3048\u306a\u3044\u305f\u3081)<\/ul>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0bb537434c4406be6db7\/10-0.png\" alt=\"image.png\" \/><\/div>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0bb537434c4406be6db7\/11-0.png\" alt=\"image.png\" \/><\/div>\n<h5>\u5f53\u5b58\u50a8\u7684\u6570\u503c\u53d8\u5927\u65f6\uff0c\u4f4d\u6570\u4e5f\u4f1a\u76f8\u5e94\u589e\u52a0\u3002<\/h5>\n<div>\n<div class=\"post-table\">10\u9032\u65702\u9032\u6570100110010010,000100111000100001,000,00011110100001001000000<\/div>\n<\/div>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u7bb1\u306e\u6570\u3092\u591a\u3081\u306b\u7528\u610f\u3057\u3066\u304a\u3051\u3070\u5927\u304d\u306a\u6570\u5024\u3067\u3082\u683c\u7d0d\u3067\u304d\u308b\u304c\u3001\u305d\u306e\u4e2d\u306b\u5c0f\u3055\u306a\u6570\u5024\u3092\u5165\u308c\u308b\u3068\u7121\u99c4\u304c\u751f\u3058\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30c7\u30fc\u30bf\u578b\u306f\u3001\u3053\u306e\u7121\u99c4\u3092\u5c11\u306a\u304f\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3042\u308a\u3001\u300c\u4f7f\u7528\u3059\u308b\u5909\u6570\u300d\u306b\u300c\u3069\u306e\u3088\u3046\u306a\u7bc4\u56f2\u306e\u5024\u3092\u683c\u7d0d\u3059\u308b\u306e\u304b\u300d\u4e8b\u524d\u306b\u6c7a\u3081\u3001\u305d\u308c\u306b\u9069\u3057\u305f\u6570\u306e\u7bb1\u3092\u78ba\u4fdd\u3059\u308b\u3053\u3068\u3067\u30e1\u30e2\u30ea\u3092\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u308c\u308b\u3002<\/ul>\n<h1>\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u79cd\u7c7b<\/h1>\n<ul class=\"post-ul\">Java\u306e\u57fa\u672c\u30c7\u30fc\u30bf\u578b\u306f8\u7a2e\u985e<\/ul>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0bb537434c4406be6db7\/17-0.png\" alt=\"image.png\" \/><\/div>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4f7f\u7528\u983b\u5ea6\u304c\u9ad8\u3044\u306e\u306fint\u578b\u3068long\u578b<\/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\">\u5c0f\u3055\u3081\u306e\u6570\u5024\u3092\u6271\u3046int\u578b\u3067\u306f\u300c32bit\u300d\u3001\u5927\u304d\u3081\u306e\u6570\u5024\u3092\u6271\u3046long\u578b\u3067\u306f\u300c64bit\u300d\u306e\u30e1\u30e2\u30ea\u3092\u4f7f\u7528\u3059\u308b<\/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\">Java\u3067\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u5909\u6570\u3092\u3069\u306e\u30c7\u30fc\u30bf\u578b\u3068\u3057\u3066\u6271\u3046\u306e\u304b\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u4f1d\u3048\u308b\u305f\u3081\u3001\u3042\u3089\u304b\u3058\u3081\u300c\u5ba3\u8a00\u300d\u3057\u3066\u304b\u3089\u4f7f\u7528\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u305d\u306e\u53cd\u9762\u3001Ruby\u3067\u306f\u5909\u6570\u3092\u4f7f\u7528\u3057\u59cb\u3081\u308b\u969b\u306b\u3001\u30c7\u30fc\u30bf\u578b\u3092\u5ba3\u8a00\u305b\u305a\u3001\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u3002<\/ul>\n<div>\u5728Ruby\u4e2d\u4e0d\u9700\u8981\u58f0\u660e\u7c7b\u578b\uff0c\u662f\u56e0\u4e3aRuby\u548cJava\u5bf9\u6570\u636e\u7c7b\u578b\u7684\u5904\u7406\u65b9\u5f0f\u663e\u8457\u4e0d\u540c\u3002<\/div>\n<h1>Ruby\u548cJava\u5728\u5904\u7406\u6570\u636e\u7c7b\u578b\u7684\u65b9\u5f0f\u4e0a\u7684\u5dee\u5f02<\/h1>\n<h3>\u52a8\u6001\u7c7b\u578b\u7f16\u7a0b\u8bed\u8a00<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u52d5\u7684\u578b\u4ed8\u3051\u8a00\u8a9e\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u6642\u306b\u5909\u6570\u306e\u30c7\u30fc\u30bf\u578b\u3092\u6c7a\u5b9a\u3059\u308b\u65b9\u5f0f\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Ruby\u306f\u3053\u3061\u3089\u306b\u542b\u307e\u308c\u308b\u3002<\/ul>\n<div>\u793a\u4f8b\u56fe\u7247<br \/>\na = 1<br \/>\nputs(a * 2)<br \/>\n# \u8f93\u51fa\u4e3a2a = &#8220;ruby&#8221;<br \/>\nputs(a * 2)<br \/>\n# \u8f93\u51fa\u4e3arubyruby<\/p>\n<\/div>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">a\u306b\u300c1\u300d\u304c\u4ee3\u5165\u3055\u308c\u3066\u3044\u308b\u5834\u5408 = \u6570\u5024\u6f14\u7b97\u304c\u884c\u308f\u308c\u3001\u300c2\u300d\u3068\u51fa\u529b\u3055\u308c\u308b\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\">\u4e00\u65b9\u3001\u300c&#8221;ruby&#8221;\u300d\u304c\u4ee3\u5165\u3055\u308c\u3066\u3044\u308b\u5834\u5408 = \u6587\u5b57\u5217\u64cd\u4f5c\u304c\u884c\u308f\u308c\u3001\u300crubyruby\u300d\u3068\u51fa\u529b\u3055\u308c\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3064\u307e\u308a\u3001Ruby(\u52d5\u7684\u578b\u4ed8\u3051\u8a00\u8a9e)\u3067\u306f\u3001\u3069\u306e\u3088\u3046\u306a\u5024\u304c\u4ee3\u5165\u3055\u308c\u305f\u304b\u306b\u3088\u3063\u3066\u3001\u5909\u6570\u306e\u30c7\u30fc\u30bf\u578b\u304c\u67d4\u8edf\u306b\u5909\u66f4\u3055\u308c\u3001\u305d\u306e\u30c7\u30fc\u30bf\u578b\u306b\u57fa\u3065\u3044\u3066\u51e6\u7406\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u3002<\/ul>\n<h3>\u9759\u6001\u7c7b\u578b\u7f16\u7a0b\u8bed\u8a00<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u9759\u7684\u578b\u4ed8\u3051\u8a00\u8a9e\u306f\u3001\u5909\u6570\u306e\u30c7\u30fc\u30bf\u578b\u3092\u6700\u521d\u306b\u6c7a\u5b9a\u3057\u305f\u3089\u5909\u66f4\u3067\u304d\u306a\u3044\u4ed5\u7d44\u307f\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\">Java\u306f\u3053\u3061\u3089\u306b\u542b\u307e\u308c\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4f8b\u3048\u3070\u3001\u6700\u521d\u306b\u300c\u6574\u6570\u300d\u3068\u3057\u3066\u5ba3\u8a00\u3057\u305f\u5909\u6570\u306b\u3001\u300c\u6587\u5b57\u5217\u300d\u3092\u4ee3\u5165\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3002<\/ul>\n<div>\u867d\u7136\u770b\u8d77\u6765\u6ca1\u6709\u7075\u6d3b\u6027\uff0c\u4f46\u8fd8\u662f\u6709\u4e00\u4e9b\u597d\u5904\uff0c\u6bd4\u5982\u53ef\u4ee5\u63d0\u9ad8\u5904\u7406\u901f\u5ea6\uff0c\u53ef\u4ee5\u5728\u6267\u884c\u4e4b\u524d\u68c0\u6d4b\u5230\u6570\u636e\u7c7b\u578b\u4e0d\u5339\u914d\u7b49\u9519\u8bef\uff01<\/div>\n<ul class=\"post-ul\">Java\u306f\u9759\u7684\u578b\u4ed8\u3051\u8a00\u8a9e\u306a\u306e\u3067\u3001\u5909\u6570\u3092\u4f7f\u7528\u3057\u59cb\u3081\u308b\u969b\u306f\u300c\u578b\u306e\u5ba3\u8a00\u300d\u304c\u5fc5\u8981\u306b\u306a\u308b\u3002<\/ul>\n<h1>\u7406\u89e3Java\u53d8\u91cf<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5909\u6570\u306e\u5f79\u5272\u306f\u3001Java\u3082Ruby\u3068\u540c\u3058\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u305f\u3060\u3057\u3001Java\u3067\u306f\u300c\u5ba3\u8a00\u300d\u3092\u884c\u308f\u306a\u3044\u3068\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3002<\/ul>\n<h1>\u53d8\u91cf\u7684\u58f0\u660e\u548c\u4f7f\u7528\u65b9\u5f0f<\/h1>\n<div>\u4e3a\u4e86\u58f0\u660e\u53d8\u91cf\uff0c\u9700\u8981\u5728\u7c7b\u578b\u540d\u540e\u9762\u7d27\u8ddf\u53d8\u91cf\u540d\u3002<br \/>\n\u7c7b\u578b\u540d \u53d8\u91cf\u540d;<br \/>\n\/\/\u884c\u672b\u9700\u8981\u52a0\u4e0a;\uff08\u5206\u53f7\uff09\u3002<\/div>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Java\u3067\u306f\u3001\u547d\u4ee4\u306e\u7d42\u308f\u308a\u306b\u30bb\u30df\u30b3\u30ed\u30f3\u304c\u5fc5\u8981&amp;\u66f8\u304d\u5fd8\u308c\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5ba3\u8a00\u3057\u305f\u5f8c\u306e\u5909\u6570\u306f\u3001Ruby\u3068\u540c\u69d8\u306b\u4f7f\u3048\u308b\u3002<\/ul>\n<div>\u4ee3\u7801\u793a\u4f8b<br \/>\nclass Main {<br \/>\npublic static void main(String[] args) {<br \/>\nint radius;<br \/>\n\/\/\u4f7f\u7528int radius;\u58f0\u660e\u4e86\u4e00\u4e2aint\u7c7b\u578b\u7684\u53d8\u91cfradius<br \/>\nradius = 10;<br \/>\n\/\/\u4f7f\u7528radius = 10;\u7ed9\u53d8\u91cfradius\u8d4b\u503c\u4e3a\u6574\u657010<br \/>\nSystem.out.println(radius * radius * 3.14);<br \/>\n\/\/System.out.println\u662f\u4e00\u4e2a\u8f93\u51fa\u65b9\u6cd5\uff0c\u7528\u4e8e\u8f93\u51fa\u62ec\u53f7\u4e2d\u7684\u5185\u5bb9\uff0c\u4e0eRuby\u7684puts\u76f8\u4f3c<br \/>\n}<br \/>\n}<\/div>\n<div>\u7136\u800c\uff0cJava\u4e2d\u6709\u4e00\u79cd\u79f0\u4e3a\u201c\u7c7b\u578b\u63a8\u65ad\u201d\u7684\u673a\u5236\uff0c\u53ef\u4ee5\u7701\u7565\u4e0e\u58f0\u660e\u76f8\u5173\u7684\u4ee3\u7801\u3002<\/div>\n<h1>\u5c0d\u65bc\u578b\u63a8\u7406\u7684\u7406\u89e3<\/h1>\n<div>\u4f7f\u7528\u7c7b\u578b\u63a8\u65ad\u8fdb\u884c\u53d8\u91cf\u58f0\u660e\u7684\u65b9\u6cd5<br \/>\nvar \u53d8\u91cf\u540d = \u503c;<\/div>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u300cvar\u300d\u3092\u4f7f\u3063\u3066\u5ba3\u8a00\u3092\u884c\u3044\u3001\u521d\u671f\u5024\u3092\u4ee3\u5165\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3053\u306e\u8a18\u8ff0\u3092\u884c\u3046\u3068\u3001\u5024\u306e\u7a2e\u985e\u306b\u3088\u3063\u3066\u30c7\u30fc\u30bf\u578b\u304c\u63a8\u8ad6\u3055\u308c\u3001\u63a8\u8ad6\u3055\u308c\u305f\u30c7\u30fc\u30bf\u578b\u3067\u5ba3\u8a00\u304c\u884c\u308f\u308c\u308b\u3002<\/ul>\n<div>\u4f8b\u5b50<br \/>\npublic class Main {<br \/>\npublic static void main(String[] args) {<br \/>\nint radius = 10;<br \/>\nSystem.out.println(radius * radius * 3.14);System.out.println(((Object)radius).getClass().getSimpleName());<br \/>\n}<br \/>\n}<br \/>\n\/\/\u8f93\u51fa\u7ed3\u679c<br \/>\n\/\/314.0<br \/>\n\/\/Integer<\/p>\n<\/div>\n<div>\u5728\u4f7f\u7528Java\u53d8\u91cf\u65f6\u9700\u8981\u8fdb\u884c\u58f0\u660e\uff01\u7136\u800c\uff0c\u5982\u679c\u5728\u58f0\u660e\u7684\u540c\u65f6\u8d4b\u4e88\u521d\u59cb\u503c\uff0c\u4e5f\u53ef\u4ee5\u7701\u7565\u3002<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u8981\u6982\u8ff0 Java\u3068Ruby\u3067\u306f\u5909\u6570\u306e\u6271\u3044\u65b9\u304c\u5927\u304d\u304f\u7570\u306a\u308a\u3001\u305d\u306e\u9055\u3044\u3084\u4f7f\u3044\u65b9\u3092\u899a\u3048\u3066\u304a\u304d\u305f\u3044\u3002 \u4e3a\u4e86\u8fbe\u5230\u7684\u7ed3\u679c [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31349","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>Java\u4e2d\u7684\u53d8\u91cf\uff08\u5907\u5fd8\u5f55\uff09 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8eJava\u4e2d\u7684\u53d8\u91cf\uff08\u5907\u5fd8\u5f55\uff09\u7684\u6280\u672f\u6587\u7ae0\" 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