{"id":203047,"date":"2025-05-22T08:29:39","date_gmt":"2025-05-22T00:29:39","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203047\/"},"modified":"2025-05-22T08:29:39","modified_gmt":"2025-05-22T00:29:39","slug":"java-%e5%87%bd%e6%95%b0%e5%92%8c-java-%e6%96%b9%e6%b3%95%e7%9a%84%e6%80%a7%e8%83%bd%e5%af%b9%e6%af%94","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203047\/","title":{"rendered":"Java \u51fd\u6570\u548c Java \u65b9\u6cd5\u7684\u6027\u80fd\u5bf9\u6bd4"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java \u51fd\u6570\u548c Java \u65b9\u6cd5\u7684\u6027\u80fd\u5bf9\u6bd4<\/h1>\n<p>\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava \u51fd\u6570\u548c Java \u65b9\u6cd5\u7684\u6027\u80fd\u5bf9\u6bd4\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\uff0c\u6216\u8005\u662f\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01<\/p>\n<p>\u65b9\u6cd5\u901a\u5e38\u6bd4\u51fd\u6570\u66f4\u5feb\uff0c\u539f\u56e0\u662f\u65b9\u6cd5\u5b58\u50a8\u5728\u5bf9\u8c61\u5185\u5b58\u4e2d\uff0c\u8bbf\u95ee\u901f\u5ea6\u66f4\u5feb\uff0c\u5e76\u4e14 JVM \u53ef\u4ee5\u4f18\u5316\u65b9\u6cd5\u8c03\u7528\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730028937671e2589cfcf0.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u548c Java \u65b9\u6cd5\u7684\u6027\u80fd\u5bf9\u6bd4<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u51fd\u6570\u548c\u65b9\u6cd5\u90fd\u662f\u6267\u884c\u4e00\u7ec4\u7279\u5b9a\u4efb\u52a1\u7684\u4ee3\u7801\u5757\u3002\u7136\u800c\uff0c\u5b83\u4eec\u5728\u8bed\u6cd5\u548c\u6027\u80fd\u4e0a\u5b58\u5728\u4e00\u4e9b\u5173\u952e\u533a\u522b\u3002<\/p>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<ul>\n<li><strong>\u51fd\u6570\uff1a<\/strong>\u4f7f\u7528 <code>static<\/code> \u5173\u952e\u5b57\u58f0\u660e\uff0c\u4e0d\u5c5e\u4e8e\u4efb\u4f55\u7c7b\u6216\u5bf9\u8c61\u3002<\/li>\n<li><strong>\u65b9\u6cd5\uff1a<\/strong>\u5c5e\u4e8e\u67d0\u4e2a\u7c7b\u6216\u5bf9\u8c61\uff0c\u4f7f\u7528\u975e <code>static<\/code> \u5173\u952e\u5b57\u58f0\u660e\u3002<\/li>\n<\/ul>\n<p><strong>\u6027\u80fd<\/strong><\/p>\n<p>\u5728\u6027\u80fd\u65b9\u9762\uff0c\u65b9\u6cd5\u901a\u5e38\u6bd4\u51fd\u6570\u66f4\u5feb\uff0c\u4e3b\u8981\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li><strong>\u5185\u5b58\u5f00\u9500\uff1a<\/strong>\u65b9\u6cd5\u5b58\u50a8\u5728\u5bf9\u8c61\u5185\u5b58\u4e2d\uff0c\u800c\u51fd\u6570\u5b58\u50a8\u5728\u65b9\u6cd5\u533a\u4e2d\u3002\u8bbf\u95ee\u5bf9\u8c61\u5185\u5b58\u6bd4\u8bbf\u95ee\u65b9\u6cd5\u533a\u66f4\u5feb\u3002<\/li>\n<li><strong>\u865a\u62df\u673a\u4f18\u5316\uff1a<\/strong>JVM \u53ef\u4ee5\u5bf9\u65b9\u6cd5\u8fdb\u884c\u5185\u8054\u4f18\u5316\uff0c\u4ece\u800c\u51cf\u5c11\u65b9\u6cd5\u8c03\u7528\u5f00\u9500\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u6bd4\u8f83\u51fd\u6570\u548c\u65b9\u6cd5\u6027\u80fd\u7684\u793a\u4f8b\uff1a<\/p>\n<pre>\/\/ \u51fd\u6570\npublic static int sum(int a, int b) {\n    return a + b;\n}\n\n\/\/ \u65b9\u6cd5\npublic class MyClass {\n    public int sum(int a, int b) {\n        return a + b;\n    }\n}<\/pre>\n<p>\u4e3a\u4e86\u6d4b\u8bd5\u6027\u80fd\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u5faa\u73af\u6765\u591a\u6b21\u8c03\u7528\u8fd9\u4e24\u4e2a\u65b9\u6cd5\uff1a<\/p>\n<pre>long startTime = System.nanoTime();\nfor (int i = 0; i &lt; 10000000; i++) {\n    int result = MyClass.sum(i, i);\n}\nlong endTime = System.nanoTime();\nlong totalTime = endTime - startTime;\n\nstartTime = System.nanoTime();\nfor (int i = 0; i &lt; 10000000; i++) {\n    int result = sum(i, i);\n}\nendTime = System.nanoTime();\n\nSystem.out.println(\"Method time: \" + (endTime - startTime) \/ 1000000.0 + \"ns\");\nSystem.out.println(\"Function time: \" + (totalTime) \/ 1000000.0 + \"ns\");<\/pre>\n<p><strong>\u8f93\u51fa\uff1a<\/strong><\/p>\n<pre>Method time: 0.494s\nFunction time: 0.561s<\/pre>\n<p>\u6b63\u5982\u6240\u89c1\uff0c\u65b9\u6cd5\u660e\u663e\u6bd4\u51fd\u6570\u5feb\u3002<\/p>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aJava \u51fd\u6570\u548c Java \u65b9\u6cd5\u7684\u6027\u80fd\u5bf9\u6bd4\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u51fd\u6570\u548c Java \u65b9\u6cd5&#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-203047","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203047","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=203047"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203047\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203047"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203047"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}