{"id":203941,"date":"2025-05-22T15:45:26","date_gmt":"2025-05-22T07:45:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203941\/"},"modified":"2025-05-22T15:45:26","modified_gmt":"2025-05-22T07:45:26","slug":"%e9%9d%99%e6%80%81%e5%9d%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203941\/","title":{"rendered":"\u9759\u6001\u5757"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u9759\u6001\u5757<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span>    <\/p>\n<p>\u6587\u7ae0\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300a\u9759\u6001\u5757\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241201\/1733035207674c04c70beba.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5b9a\u4e49\uff1a<\/strong><\/p>\n<ul>\n<li>\u9759\u6001\u5757\u662f jvm \u9996\u6b21\u52a0\u8f7d\u7c7b\u65f6\u6267\u884c\u7684\u4e00\u6bb5\u4ee3\u7801\u3002<\/li>\n<li>\u7528\u4e8e\u521d\u59cb\u5316\u9759\u6001\u53d8\u91cf\u6216\u6267\u884c\u7c7b\u4f7f\u7528\u4e4b\u524d\u9700\u8981\u5b8c\u6210\u7684\u4efb\u52a1\u3002<\/li>\n<\/ul>\n<p><strong>\u76ee\u7684\uff1a<\/strong><\/p>\n<ul>\n<li>\u53ef\u7528\u4e8e\u6267\u884c\u91cd\u8981\u7684\u521d\u59cb\u5316\uff0c\u4f8b\u5982\u5efa\u7acb\u8fde\u63a5\u6216\u8ba1\u7b97\u521d\u59cb\u503c\u3002<\/li>\n<li>\u5bf9\u4e8e\u5728\u521b\u5efa\u4efb\u4f55\u5b9e\u4f8b\u4e4b\u524d\u6216\u8c03\u7528\u9759\u6001\u65b9\u6cd5\u4e4b\u524d\u51c6\u5907\u7c7b\u5f88\u6709\u7528\u3002<\/li>\n<\/ul>\n<p><strong>\u6267\u884c\uff1a<\/strong><\/p>\n<ul>\n<li>\u9759\u6001\u5757\u4ec5\u5728\u7c7b\u52a0\u8f7d\u540e\u6267\u884c\u4e00\u6b21\uff0c\u5728\u4e0e\u8be5\u7c7b\u76f8\u5173\u7684\u4efb\u4f55\u5176\u4ed6\u4ee3\u7801\u4e4b\u524d\u6267\u884c\u3002<\/li>\n<li>\u5373\u4f7f\u6ca1\u6709\u521b\u5efa\u8be5\u7c7b\u7684\u5bf9\u8c61\u4e5f\u4f1a\u6267\u884c\u3002<\/li>\n<\/ul>\n<p><strong>\u5e26\u6709\u9759\u6001\u5757\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n<h2> \u9759\u6001\u5757.java <\/h2>\n<pre>\/\/ Usa um bloco est\u00e1tico\nclass StaticBlock {\n    static double rootOf2;\n    static double rootOf3;\n\n    \/\/ Bloco est\u00e1tico para inicializa\u00e7\u00e3o\n    static {\n        System.out.println(\"Inside static block.\");\n        rootOf2 = Math.sqrt(2.0);\n        rootOf3 = Math.sqrt(3.0);\n    }\n\n    StaticBlock(String msg) {\n        System.out.println(msg);\n    }\n}\n\nclass SDemo3 {\n    public static void main(String args[]) {\n        StaticBlock ob = new StaticBlock(\"Inside Constructor\");\n        System.out.println(\"Square root of 2 is \" + StaticBlock.rootOf2);\n        System.out.println(\"Square root of 3 is \" + StaticBlock.rootOf3);\n    }\n}\n\n<\/pre>\n<ul>\n<li>\u6d88\u606f\u201c\u9759\u6001\u5757\u5185\u201d\u3002\u8868\u660e\u9759\u6001\u5757\u662f\u5728\u521b\u5efa staticblock \u5bf9\u8c61\u4e4b\u524d\u6267\u884c\u7684\u3002<\/li>\n<li>rootof2 \u548c rootof3 \u7684\u503c\u5728\u9759\u6001\u5757\u4e2d\u8ba1\u7b97\uff0c\u5e76\u4e14\u5728\u6267\u884c\u4efb\u4f55\u65b9\u6cd5\u6216\u5bf9\u8c61\u6784\u9020\u4e4b\u524d\u53ef\u7528\u3002<\/li>\n<\/ul>\n<p><strong>\u9759\u6001\u5757\u7684\u4f18\u70b9\uff1a<\/strong><br \/> \u5b83\u4eec\u786e\u4fdd\u5728\u4f7f\u7528\u7c7b\u4e4b\u524d\u5728\u9002\u5f53\u7684\u65f6\u95f4\u5b89\u5168\u5730\u5b8c\u6210\u67d0\u4e9b\u521d\u59cb\u5316\u3002<\/p>\n<p><strong>\u5e38\u89c1\u7528\u6cd5\uff1a<\/strong><\/p>\n<ul>\n<li>\u542f\u52a8\u590d\u6742\u7684\u9759\u6001\u53d8\u91cf\u6216\u6267\u884c\u7c7b\u6240\u9700\u8d44\u6e90\u7684\u521d\u59cb\u914d\u7f6e\u3002<\/li>\n<\/ul>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u9759\u6001\u5757\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n<p>      \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9759\u6001\u5757 \u6536\u85cf \u6587\u7ae0\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728&#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-203941","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203941","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=203941"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203941\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}