{"id":202585,"date":"2025-05-22T08:21:06","date_gmt":"2025-05-22T00:21:06","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202585\/"},"modified":"2025-05-22T08:21:06","modified_gmt":"2025-05-22T00:21:06","slug":"java%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0%e5%a6%82%e4%bd%95%e5%ae%9a%e4%b9%89%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202585\/","title":{"rendered":"Java\u51fd\u6570\u7684\u53c2\u6570\u5982\u4f55\u5b9a\u4e49\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u7684\u53c2\u6570\u5982\u4f55\u5b9a\u4e49\uff1f<\/h1>\n<p><span style=\"color: #222222;, sans-serif;background-color: #FFFFFF\">\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898<span style=\"color: #222222;, sans-serif;background-color: #FFFFFF\">\u662f<\/span><span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava\u51fd\u6570\u7684\u53c2\u6570\u5982\u4f55\u5b9a\u4e49\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8e<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span><\/p>\n<p>Java \u51fd\u6570\u53c2\u6570\u5b9a\u4e49\u529f\u80fd\u548c\u7c7b\u578b\uff1a\u58f0\u660e\u51fd\u6570\u63a5\u6536\u7684\u4fe1\u606f\uff0c\u4ee5\u4fbf\u6267\u884c\u64cd\u4f5c\u3002\u53c2\u6570\u7c7b\u578b\uff1a\u6307\u5b9a\u51fd\u6570\u671f\u671b\u63a5\u6536\u7684\u6570\u636e\u7c7b\u578b\uff08\u57fa\u672c\u3001\u5bf9\u8c61\u3001\u6570\u7ec4\uff09\u3002\u53c2\u6570\u987a\u5e8f\uff1a\u51fd\u6570\u5b9a\u4e49\u4e2d\u6309\u987a\u5e8f\u5217\u51fa\u3002\u53ef\u9009\u53c2\u6570\uff1a\u4f7f\u7528 Optional \u7c7b\u5b9a\u4e49\uff0c\u5141\u8bb8\u51fd\u6570\u5728\u4e0d\u63d0\u4f9b\u7279\u5b9a\u53c2\u6570\u503c\u7684\u60c5\u51b5\u4e0b\u8c03\u7528\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729920155671c7c9b05b7f.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u53c2\u6570\u5b9a\u4e49\uff1a\u7c7b\u578b\u3001\u987a\u5e8f\u548c\u53ef\u9009\u503c<\/strong><\/p>\n<p><strong>\u7b80\u4ecb<\/strong><\/p>\n<p>\u51fd\u6570\u53c2\u6570\u5b9a\u4e49\u4e86\u51fd\u6570\u63a5\u6536\u7684\u4fe1\u606f\uff0c\u4ee5\u4fbf\u6267\u884c\u6240\u9700\u7684\u8ba1\u7b97\u6216\u4efb\u52a1\u3002Java \u51fd\u6570\u7684\u53c2\u6570\u53ef\u4ee5\u662f\u5404\u79cd\u7c7b\u578b\uff0c\u5305\u62ec\u539f\u59cb\u7c7b\u578b\u3001\u5bf9\u8c61\u548c\u6570\u7ec4\u3002<\/p>\n<p><strong>\u53c2\u6570\u7c7b\u578b<\/strong><\/p>\n<p>\u53c2\u6570\u7c7b\u578b\u6307\u5b9a\u51fd\u6570\u671f\u671b\u63a5\u6536\u7684\u6570\u636e\u7c7b\u578b\u3002\u5e38\u89c1\u7684\u53c2\u6570\u7c7b\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u57fa\u672c\u7c7b\u578b\uff1a\u4f8b\u5982 int\u3001double\u3001char<\/li>\n<li>\u5bf9\u8c61\u7c7b\u578b\uff1a\u4f8b\u5982 String\u3001Date<\/li>\n<li>\u6570\u7ec4\u7c7b\u578b\uff1a\u4f8b\u5982 int[]\u3001String[]<\/li>\n<\/ul>\n<p><strong>\u53c2\u6570\u987a\u5e8f<\/strong><\/p>\n<p>\u5728\u51fd\u6570\u5b9a\u4e49\u4e2d\uff0c\u53c2\u6570\u6309\u5176\u9884\u671f\u4f20\u5165\u7684\u987a\u5e8f\u5217\u51fa\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>public void addNumbers(int num1, int num2) {\n    ...\n}<\/pre>\n<p><strong>\u53ef\u9009\u53c2\u6570<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 <code>Optional<\/code> \u7c7b\u5b9a\u4e49\u53ef\u9009\u53c2\u6570\u3002\u8fd9\u5141\u8bb8\u51fd\u6570\u5728\u4e0d\u63d0\u4f9b\u7279\u5b9a\u7684\u53c2\u6570\u503c\u7684\u60c5\u51b5\u4e0b\u4ecd\u7136\u88ab\u8c03\u7528\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>public void printMessage(String message, boolean isImportant) {\n    ...\n}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u540d\u4e3a <code>calculateArea<\/code> \u7684\u51fd\u6570\uff0c\u5b83\u8ba1\u7b97\u77e9\u5f62\u7684\u9762\u79ef\uff1a<\/p>\n<pre>public double calculateArea(double length, double width) {\n    return length * width;\n}<\/pre>\n<p>\u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\uff0c<code>length<\/code> \u548c <code>width<\/code> \u53c2\u6570\u5b9a\u4e49\u4e3a double \u7c7b\u578b\uff0c\u5e76\u4e14\u6309\u987a\u5e8f\u5217\u51fa\u3002\u8be5\u51fd\u6570\u63a5\u6536\u77e9\u5f62\u7684\u957f\u548c\u5bbd\uff0c\u5e76\u8fd4\u56de\u8ba1\u7b97\u51fa\u7684\u9762\u79ef\u3002<\/p>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>Java \u51fd\u6570\u53c2\u6570\u7684\u7c7b\u578b\u3001\u987a\u5e8f\u548c\u53ef\u9009\u6027\u662f\u5b9a\u4e49\u660e\u786e\u51fd\u6570\u8f93\u5165\u81f3\u5173\u91cd\u8981\u7684\u56e0\u7d20\u3002\u6e05\u6670\u5b9a\u4e49\u7684\u53c2\u6570\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u300aJava\u51fd\u6570\u7684\u53c2\u6570\u5982\u4f55\u5b9a\u4e49\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8ejava,\u53c2\u6570\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u7684\u53c2\u6570\u5982\u4f55\u5b9a\u4e49\uff1f \u5404&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-202585","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202585","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202585"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202585\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202585"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202585"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}