{"id":31360,"date":"2023-04-02T00:22:54","date_gmt":"2023-11-09T14:58:04","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%9c%89%e5%85%b3java%e5%88%9d%e5%a7%8b%e5%8c%96%e7%a8%8b%e5%ba%8f%e7%9a%84%e9%a1%ba%e5%ba%8f\/"},"modified":"2025-08-12T23:38:46","modified_gmt":"2025-08-12T15:38:46","slug":"%e6%9c%89%e5%85%b3java%e5%88%9d%e5%a7%8b%e5%8c%96%e7%a8%8b%e5%ba%8f%e7%9a%84%e9%a1%ba%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%9c%89%e5%85%b3java%e5%88%9d%e5%a7%8b%e5%8c%96%e7%a8%8b%e5%ba%8f%e7%9a%84%e9%a1%ba%e5%ba%8f\/","title":{"rendered":"\u6709\u5173Java\u521d\u59cb\u5316\u7a0b\u5e8f\u7684\u987a\u5e8f"},"content":{"rendered":"<h1>\u521d\u59cb\u5316\u51fd\u6570\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/h1>\n<p>\u8fd9\u662f\u7528\u4e8e\u5728\u7c7b\u52a0\u8f7d\u65f6\u6216\u5b9e\u4f8b\u5316\u65f6\u521d\u59cb\u5316\u5b57\u6bb5\u7684\u4e1c\u897f\u3002<br \/>\n\u52a0\u8f7d\u65f6\u4f7f\u7528static\u521d\u59cb\u5316\u5668(\u4ee5\u4e0b\u79f0\u4e3astatic{})\uff0c\u5b9e\u4f8b\u5316\u65f6\u4f7f\u7528\u521d\u59cb\u5316\u5668(\u4ee5\u4e0b\u79f0\u4e3a{})\u3002<br \/>\n\u5728JavaGold\u4e4b\u524d\u7684\u8303\u56f4\u5185\uff0c\u53ea\u6709\u8fd9\u4e24\u4e2a\uff0c\u4f46\u662f\u5b83\u4eec\u7684\u987a\u5e8f\u548c\u8c03\u7528\u65b9\u5f0f\u6709\u4e9b\u590d\u6742\uff0c<br \/>\n\u6240\u4ee5\u6211\u505a\u4e86\u4e00\u4e2a\u603b\u7ed3\u5907\u5fd8\u3002<\/p>\n<h1>\u57fa\u672c\u7684\u4ee3\u7801\u4e0e\u89e3\u91ca<\/h1>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Foo<\/span><span class=\"o\">{<\/span>\r\n\t<span class=\"c1\">\/\/\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6<\/span>\r\n\t<span class=\"o\">{<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">print<\/span><span class=\"o\">(<\/span><span class=\"s\">\"A\"<\/span><span class=\"o\">);}<\/span>\r\n\t<span class=\"c1\">\/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/span>\r\n\t<span class=\"nc\">Foo<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">print<\/span><span class=\"o\">(<\/span><span class=\"s\">\"B\"<\/span><span class=\"o\">);}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Test<\/span><span class=\"o\">{<\/span>\r\n\t<span class=\"c1\">\/\/static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6<\/span>\r\n\t<span class=\"kd\">static<\/span> <span class=\"o\">{<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">print<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C\"<\/span><span class=\"o\">);}<\/span>\r\n    <span class=\"c1\">\/\/main()<\/span>\r\n\t<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>\r\n\t\t<span class=\"c1\">\/\/\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316<\/span>\r\n\t\t<span class=\"nc\">Foo<\/span> <span class=\"n\">foo<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Foo<\/span><span class=\"o\">();<\/span>\r\n\t<span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u56e0\u4e3a\u89c9\u5f97\u96be\u4ee5\u770b\u6e05\u695a\uff0c\u6211\u53ea\u6362\u4e86\u4e00\u4e0b\u7c7b\u548cmain()\u7684\u884c\u3002\u5982\u679c\u53cd\u800c\u66f4\u96be\u770b\u6e05\u695a\u7684\u8bdd\uff0c\u6211\u5f88\u62b1\u6b49\u3002<\/p>\n<pre class=\"post-pre\"><code>CAB\r\n<\/code><\/pre>\n<h3>\u89e3\u91ca<\/h3>\n<p>static{}\u5728\u7c7b\u52a0\u8f7d\u65f6\u88ab\u52a0\u8f7d\uff0c\u56e0\u6b64\u5728\u5305\u542bmain()\u65b9\u6cd5\u7684Test\u7c7b\u4e2d\uff0c&#8221;C&#8221;\u4f1a\u9996\u5148\u88ab\u8f93\u51fa\u3002\u63a5\u4e0b\u6765\uff0c\u5728main()\u65b9\u6cd5\u4e2d\u521b\u5efa\u4e86Foo\u7c7b\u5bf9\u8c61\u3002<br \/>\n\u5728\u6b64\u8fc7\u7a0b\u4e2d\uff0c{}\u4f1a\u5148\u4e8e\u6784\u9020\u51fd\u6570\u88ab\u8c03\u7528\uff0c\u7136\u540e\u624d\u8c03\u7528\u6784\u9020\u51fd\u6570\u3002<br \/>\n\u56e0\u6b64\u8f93\u51fa\u987a\u5e8f\u662f&#8221;CAB&#8221;\u3002<\/p>\n<h1>\u6709\u4e9b\u590d\u6742\u7684\u4ee3\u7801\u548c\u89e3\u91ca<\/h1>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Foo<\/span><span class=\"o\">{<\/span>\r\n\t<span class=\"o\">{<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">print<\/span><span class=\"o\">(<\/span><span class=\"s\">\"A\"<\/span><span class=\"o\">);}<\/span>\r\n\t<span class=\"nc\">Foo<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">print<\/span><span class=\"o\">(<\/span><span class=\"s\">\"B\"<\/span><span class=\"o\">);}<\/span>\t\r\n<span class=\"o\">}<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Bar<\/span><span class=\"o\">{<\/span>\r\n\t<span class=\"c1\">\/\/\u30d5\u30a3\u30fc\u30eb\u30c9<\/span>\r\n\t<span class=\"kd\">static<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"o\">;<\/span>\r\n\t<span class=\"c1\">\/\/\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6<\/span>\r\n\t<span class=\"o\">{<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">print<\/span><span class=\"o\">(<\/span><span class=\"s\">\"D\"<\/span><span class=\"o\">);}<\/span>\r\n\t<span class=\"c1\">\/\/static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6<\/span>\r\n\t<span class=\"kd\">static<\/span> <span class=\"o\">{<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">print<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C\"<\/span><span class=\"o\">);}<\/span>\r\n\t<span class=\"c1\">\/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/span>\r\n\t<span class=\"nc\">Bar<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">print<\/span><span class=\"o\">(<\/span><span class=\"s\">\"E\"<\/span><span class=\"o\">);}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Test<\/span><span class=\"o\">{<\/span>\r\n\t<span class=\"c1\">\/\/main()<\/span>\r\n\t<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>\r\n\t\t<span class=\"c1\">\/\/Foo\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316<\/span>\r\n\t\t<span class=\"nc\">Foo<\/span> <span class=\"n\">foo<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Foo<\/span><span class=\"o\">();<\/span>\r\n\t\t<span class=\"c1\">\/\/Bar\u30af\u30e9\u30b9\u306e\u5909\u6570i\u3092\u51fa\u529b<\/span>\r\n\t\t<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">print<\/span><span class=\"o\">(<\/span><span class=\"nc\">Bar<\/span><span class=\"o\">.<\/span><span class=\"na\">i<\/span><span class=\"o\">);<\/span>\r\n\t\t<span class=\"c1\">\/\/Bar\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316<\/span>\r\n\t\t<span class=\"nc\">Bar<\/span> <span class=\"n\">bar<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Bar<\/span><span class=\"o\">();<\/span>\r\n\t<span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u5c31\u662f\u6267\u884c\u7ed3\u679c\u3002<\/p>\n<pre class=\"post-pre\"><code>ABC1DE\r\n<\/code><\/pre>\n<h3>\u89e3\u91ca<\/h3>\n<p>\u6700\u521d\u7684main()\u7684\u7b2c\u4e00\u884c\u4e0e\u524d\u8ff0\u7684\u57fa\u672c\u4ee3\u7801\u76f8\u540c\uff0c\u5c06\u8f93\u51fa&#8221;AB&#8221;\u3002<br \/>\n\u7b2c\u4e8c\u884c\u7684Bar\u53d8\u91cfi\u8f93\u51fa\u7684\u662f\uff0c\u7531\u4e8e\u53d8\u91cfi\u662f\u9759\u6001\u7684\uff0c\u56e0\u6b64\u4e0d\u9700\u8981\u751f\u6210\u3002\u5f53\u5c1d\u8bd5\u8fdb\u884c\u5904\u7406\u65f6\uff0c\u5728\u8f93\u51fa\u4e4b\u524d\u4f1a\u6267\u884cstatic{}\u3002\u56e0\u6b64\u53ef\u4ee5\u770b\u51fa\uff0c\u8f93\u51fa\u7684\u987a\u5e8f\u662f&#8221;C1&#8243;\u3002<br \/>\n\u968f\u540e\uff0c\u4f1a\u751f\u6210Bar\u7c7b\uff0c\u5e76\u8fdb\u884c{}\u548cconstructor\u7684\u5904\u7406\uff0c\u8f93\u51fa&#8221;DE&#8221;\u3002\u6b64\u65f6static{}\u5df2\u7ecf\u8f93\u51fa\u8fc7\u4e00\u6b21\uff0c\u56e0\u6b64\u65e0\u8bba\u662f\u5426\u5c1d\u8bd5\u91cd\u65b0\u751f\u6210\uff0c\u5904\u7406\u90fd\u4e0d\u4f1a\u6267\u884c\u3002<\/p>\n<h3>\u53e6\u5916\u8fd8\u6709<\/h3>\n<p>\u5220\u9664Bar\u7c7b\u53d8\u91cfi\u7684\u8f93\u51fa\u8bed\u53e5\u5e76\u6267\u884c\uff0c\u7ed3\u679c\u662fABCDE\u3002\u4ee3\u7801\u7684\u987a\u5e8f\u662fstatic{}\u4e4b\u540e\uff0c\u4f46\u6267\u884c\u987a\u5e8f\u662f{}\u4e4b\u540e\u3002<\/p>\n<h1>\u6700\u540e<\/h1>\n<p>\u6211\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d\u6700\u5148\u6000\u7591\u7684\u662f\uff0c\u5982\u679cstatic{}\u5728main()\u6240\u5728\u7684\u7c7b\u4ee5\u5916\uff0c\u5b83\u4f1a\u4e0d\u4f1a\u88ab\u9996\u5148\u52a0\u8f7d\uff1f\u6700\u7ec8\u53d1\u73b0\u7c7b\u53ea\u6709\u5728\u88ab\u8c03\u7528\u65f6\u624d\u4f1a\u88ab\u52a0\u8f7d\uff0c\u8fd9\u4e2a\u610f\u8bc6\u771f\u662f\u592a\u597d\u4e86\u3002<\/p>\n<h1>\u8865\u5145<\/h1>\n<h3>\u6211\u5fd8\u4e86\u5199\u5173\u4e8e\u521d\u59cb\u5316\u7a0b\u5e8f\u7684\u4e8b\u60c5\uff0c\u73b0\u5728\u8865\u4e0a\u6765\u3002<\/h3>\n<p>\u30fb\u5728Interface\u4e2d\u4f7f\u7528\u521d\u59cb\u5316\u5668\u7684\u5199\u6cd5\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002\uff08\u53ef\u80fd\uff09<br \/>\n\u2192\u5982\u679c\u6709\u4eba\u80fd\u5199\u51fa\u6b63\u786e\u7684\u5199\u6cd5\uff0c\u9ebb\u70e6\u5c06\u5176\u8bc4\u8bba\u5206\u4eab\u4e00\u4e0b\uff0c\u975e\u5e38\u611f\u8c22\u3002<br \/>\n\u30fb\u5173\u4e8e\u521d\u59cb\u5316\u5668\u3002\u5f53\u5728main()\u51fd\u6570\u4e2d\u751f\u6210\u7ee7\u627f\u4e86\u5e26\u6709\u521d\u59cb\u5316\u5668\u7684\u7236\u7c7b\u7684\u5b50\u7c7b\u65f6\uff0c\u4f1a\u8c03\u7528\u5b50\u7c7b\u4e2d\u7684\u7236\u7c7b\u6784\u9020\u65b9\u6cd5\uff0c<br \/>\n\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\u4e5f\u4f1a\u6267\u884c\u521d\u59cb\u5316\u5668\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u521d\u59cb\u5316\u51fd\u6570\u662f\u4ec0\u4e48\u610f\u601d\uff1f \u8fd9\u662f\u7528\u4e8e\u5728\u7c7b\u52a0\u8f7d\u65f6\u6216\u5b9e\u4f8b\u5316\u65f6\u521d\u59cb\u5316\u5b57\u6bb5\u7684\u4e1c\u897f\u3002 \u52a0\u8f7d\u65f6\u4f7f\u7528static\u521d\u59cb\u5316\u5668(\u4ee5\u4e0b\u79f0 [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31360","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>\u6709\u5173Java\u521d\u59cb\u5316\u7a0b\u5e8f\u7684\u987a\u5e8f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u6709\u5173Java\u521d\u59cb\u5316\u7a0b\u5e8f\u7684\u987a\u5e8f\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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