{"id":53133,"date":"2025-08-12T00:59:28","date_gmt":"2025-08-11T16:59:28","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/53133.html"},"modified":"2025-08-12T00:59:28","modified_gmt":"2025-08-11T16:59:28","slug":"%e5%b8%a6%e4%bd%a0%e6%8e%8c%e6%8f%a1java%e4%bb%a3%e7%a0%81%e5%9d%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/53133.html","title":{"rendered":"\u5e26\u4f60\u638c\u63e1Java\u4ee3\u7801\u5757"},"content":{"rendered":"
\u5f15\u8a00<\/h5>\n

Java\u4ee3\u7801\u5757\u662f\u7528\u4e8e\u5c01\u88c5\u4e00\u7ec4\u8bed\u53e5\u7684\u8bed\u6cd5\u7ed3\u6784，\u7528\u4e8e\u63a7\u5236\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u6216\u6267\u884c\u7279\u5b9a\u903b\u8f91\u3002\u5176\u4f5c\u7528\u5305\u62ec\u7b80\u5316\u4ee3\u7801\u3001\u4f18\u5316\u521d\u59cb\u5316\u987a\u5e8f\u3001\u5b9e\u73b0\u7ebf\u7a0b\u540c\u6b65\u7b49\u3002\u672c\u6587\u9002\u5408\u4ece\u57fa\u7840\u5230\u8fdb\u9636\u7684Java\u5f00\u53d1\u8005，\u6db5\u76d6\u4ee3\u7801\u5757\u7684\u5206\u7c7b\u3001\u6267\u884c\u987a\u5e8f\u3001\u5e94\u7528\u573a\u666f\u53ca\u5e38\u89c1\u95ee\u9898\u3002<\/p>\n

Java\u4ee3\u7801\u5757\u7684\u57fa\u672c\u5206\u7c7b<\/h5>\n

\u666e\u901a\u4ee3\u7801\u5757
\n\u5728\u65b9\u6cd5\u6216\u8bed\u53e5\u4e2d\u5b9a\u4e49\u7684\u4ee3\u7801\u5757，\u7528\u4e8e\u9650\u5236\u53d8\u91cf\u4f5c\u7528\u57df：<\/p>\n

void demoMethod() {
\n { \/\/ \u666e\u901a\u4ee3\u7801\u5757
\n int x = 10;
\n System.out.println(x);
\n }
\n \/\/ x \u5728\u6b64\u5904\u4e0d\u53ef\u8bbf\u95ee
\n}<\/p>\n

\u6784\u9020\u4ee3\u7801\u5757
\n\u5b9a\u4e49\u5728\u7c7b\u4e2d，\u6bcf\u6b21\u521b\u5efa\u5bf9\u8c61\u65f6\u6267\u884c，\u4f18\u5148\u4e8e\u6784\u9020\u65b9\u6cd5：<\/p>\n

class Example {
\n { \/\/ \u6784\u9020\u4ee3\u7801\u5757
\n System.out.println("\u6784\u9020\u4ee3\u7801\u5757\u6267\u884c");
\n }
\n Example() {
\n System.out.println("\u6784\u9020\u65b9\u6cd5\u6267\u884c");
\n }
\n}<\/p>\n

\u9759\u6001\u4ee3\u7801\u5757
\n\u7528static\u4fee\u9970，\u7c7b\u52a0\u8f7d\u65f6\u6267\u884c\u4e14\u4ec5\u6267\u884c\u4e00\u6b21：<\/p>\n

class Example {
\n static { \/\/ \u9759\u6001\u4ee3\u7801\u5757
\n System.out.println("\u9759\u6001\u4ee3\u7801\u5757\u6267\u884c");
\n }
\n}<\/p>\n

\u540c\u6b65\u4ee3\u7801\u5757
\n\u901a\u8fc7synchronized\u5b9e\u73b0\u7ebf\u7a0b\u540c\u6b65，\u9700\u6307\u5b9a\u9501\u5bf9\u8c61：<\/p>\n

synchronized(this) { \/\/ \u540c\u6b65\u4ee3\u7801\u5757
\n \/\/ \u7ebf\u7a0b\u5b89\u5168\u64cd\u4f5c
\n}<\/p>\n

\u4ee3\u7801\u5757\u7684\u6267\u884c\u987a\u5e8f<\/h5>\n
  • \u5355\u7c7b\u4e2d\u7684\u6267\u884c\u987a\u5e8f：\u9759\u6001\u4ee3\u7801\u5757 \u2192 \u6784\u9020\u4ee3\u7801\u5757 \u2192 \u6784\u9020\u65b9\u6cd5\u3002<\/li>\n
  • \u7ee7\u627f\u5173\u7cfb\u4e2d\u7684\u987a\u5e8f：\u7236\u7c7b\u9759\u6001 \u2192 \u5b50\u7c7b\u9759\u6001 \u2192 \u7236\u7c7b\u6784\u9020\u5757 \u2192 \u7236\u7c7b\u6784\u9020\u65b9\u6cd5 \u2192 \u5b50\u7c7b\u6784\u9020\u5757 \u2192 \u5b50\u7c7b\u6784\u9020\u65b9\u6cd5\u3002<\/li>\n
  • \u591a\u4e2a\u540c\u7c7b\u4ee3\u7801\u5757：\u6309\u5b9a\u4e49\u987a\u5e8f\u4f9d\u6b21\u6267\u884c\u3002<\/li>\n
    \u5b9e\u9645\u5e94\u7528\u573a\u666f<\/h5>\n
      \n
    • \u9759\u6001\u4ee3\u7801\u5757：\u52a0\u8f7dJDBC\u9a71\u52a8\u6216\u521d\u59cb\u5316\u9759\u6001\u914d\u7f6e\u3002<\/li>\n
    • \u6784\u9020\u4ee3\u7801\u5757：\u63d0\u53d6\u591a\u4e2a\u6784\u9020\u65b9\u6cd5\u7684\u516c\u5171\u903b\u8f91\u3002<\/li>\n
    • \u540c\u6b65\u4ee3\u7801\u5757：\u4fdd\u62a4\u5171\u4eab\u8d44\u6e90，\u5982\u591a\u7ebf\u7a0b\u4e0b\u7684\u8ba1\u6570\u5668\u64cd\u4f5c\u3002<\/li>\n
    • \u666e\u901a\u4ee3\u7801\u5757：\u5728\u590d\u6742\u65b9\u6cd5\u4e2d\u9694\u79bb\u4e34\u65f6\u53d8\u91cf\u3002<\/li>\n<\/ul>\n
      \u6ce8\u610f\u4e8b\u9879<\/h5>\n
        \n
      • \u9759\u6001\u4ee3\u7801\u5757\u4e2d\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u975e\u9759\u6001\u6210\u5458\u3002<\/li>\n
      • \u907f\u514d\u5728\u9759\u6001\u4ee3\u7801\u5757\u4e2d\u6267\u884c\u8017\u65f6\u64cd\u4f5c，\u5f71\u54cd\u7c7b\u52a0\u8f7d\u6027\u80fd\u3002<\/li>\n
      • \u540c\u6b65\u4ee3\u7801\u5757\u7684\u9501\u5bf9\u8c61\u9700\u8c28\u614e\u9009\u62e9，\u901a\u5e38\u4f7f\u7528this\u6216\u7c7b\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n
        \u5e38\u89c1\u9762\u8bd5\u9898<\/h5>\n
      • \u4ee5\u4e0b\u4ee3\u7801\u7684\u8f93\u51fa\u987a\u5e8f\u662f\u4ec0\u4e48？<\/li>\n

        class Parent {
        \n static { System.out.println("Parent\u9759\u6001\u5757"); }
        \n { System.out.println("Parent\u6784\u9020\u5757"); }
        \n Parent() { System.out.println("Parent\u6784\u9020\u65b9\u6cd5"); }
        \n}
        \nclass Child extends Parent {
        \n static { System.out.println("Child\u9759\u6001\u5757"); }
        \n { System.out.println("Child\u6784\u9020\u5757"); }
        \n Child() { System.out.println("Child\u6784\u9020\u65b9\u6cd5"); }
        \n}<\/p>\n

        \u7b54\u6848：Parent\u9759\u6001\u5757 \u2192 Child\u9759\u6001\u5757 \u2192 Parent\u6784\u9020\u5757 \u2192 Parent\u6784\u9020\u65b9\u6cd5 \u2192 Child\u6784\u9020\u5757 \u2192 Child\u6784\u9020\u65b9\u6cd5\u3002<\/p>\n

        \u603b\u7ed3<\/h5>\n

        \u4ee3\u7801\u5757\u662fJava\u4e2d\u7075\u6d3b\u63a7\u5236\u521d\u59cb\u5316\u903b\u8f91\u548c\u7ebf\u7a0b\u540c\u6b65\u7684\u91cd\u8981\u5de5\u5177\u3002\u5408\u7406\u4f7f\u7528\u53ef\u63d0\u5347\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u6267\u884c\u6548\u7387，\u540c\u65f6\u9700\u6ce8\u610f\u5176\u6267\u884c\u987a\u5e8f\u548c\u9002\u7528\u573a\u666f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

        \u4ee3\u7801\u5757\u662fJava\u4e2d\u7075\u6d3b\u63a7\u5236\u521d\u59cb\u5316\u903b\u8f91\u548c\u7ebf\u7a0b\u540c\u6b65\u7684\u91cd\u8981\u5de5\u5177\u3002\u5408\u7406\u4f7f\u7528\u53ef\u63d0\u5347\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u6267\u884c\u6548\u7387\uff0c\u540c\u65f6\u9700\u6ce8\u610f\u5176\u6267\u884c\u987a\u5e8f\u548c\u9002\u7528\u573a\u666f\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,190],"topic":[],"class_list":["post-53133","post","type-post","status-publish","format-standard","hentry","category-server","tag-java","tag-190"],"yoast_head":"\n\u5e26\u4f60\u638c\u63e1Java\u4ee3\u7801\u5757 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/53133.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5e26\u4f60\u638c\u63e1Java\u4ee3\u7801\u5757 - 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