{"id":202808,"date":"2025-05-22T08:43:08","date_gmt":"2025-05-22T00:43:08","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202808\/"},"modified":"2025-05-22T08:43:08","modified_gmt":"2025-05-22T00:43:08","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-java-%e4%b8%ad%e5%a3%b0%e6%98%8e%e5%90%8c%e6%ad%a5%e5%87%bd%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202808\/","title":{"rendered":"\u5982\u4f55\u5728 Java \u4e2d\u58f0\u660e\u540c\u6b65\u51fd\u6570\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u58f0\u660e\u540c\u6b65\u51fd\u6570\uff1f<\/h1>\n

\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587\u300a\u5982\u4f55\u5728 Java \u4e2d\u58f0\u660e\u540c\u6b65\u51fd\u6570\uff1f\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n

<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u58f0\u660e\u540c\u6b65\u51fd\u6570\uff1f<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u540c\u6b65\u51fd\u6570\u53ef\u4ee5\u9632\u6b62\u591a\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u6570\u636e\uff0c\u4ece\u800c\u907f\u514d\u6570\u636e\u7ade\u4e89\uff08race condition\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u5728\u65b9\u6cd5\u58f0\u660e\u524d\u4f7f\u7528 synchronized<\/code> \u5173\u952e\u5b57\u6765\u58f0\u660e\u4e00\u4e2a\u540c\u6b65\u51fd\u6570\u3002<\/p>\n

\u8bed\u6cd5\uff1a<\/strong><\/p>\n

public synchronized void methodName() {\n    \/\/ \u540c\u6b65\u4ee3\u7801\u5757\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n
\u8003\u8651\u4e00\u4e2a\u94f6\u884c\u5e10\u6237\u7c7b\uff0c\u5b83\u5177\u6709\u4e00\u4e2a deposit<\/code> \u65b9\u6cd5\u6765\u5411\u5e10\u6237\u5b58\u6b3e\uff1a<\/p>\n
public class BankAccount {\n    private double balance;\n\n    public synchronized void deposit(double amount) {\n        balance += amount;\n    }\n}<\/pre>\n
\u901a\u8fc7\u5c06 deposit<\/code> \u65b9\u6cd5\u58f0\u660e\u4e3a\u540c\u6b65\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u786e\u4fdd\u4e00\u6b21\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u8bbf\u95ee balance<\/code> \u5b57\u6bb5\u3002\u8fd9\u9632\u6b62\u4e86\u6570\u636e\u7ade\u4e89\uff0c\u56e0\u4e3a\u5982\u679c\u6ca1\u6709\u540c\u6b65\uff0c\u591a\u4e2a\u7ebf\u7a0b\u53ef\u80fd\u4f1a\u540c\u65f6\u5c1d\u8bd5\u66f4\u65b0\u4f59\u989d\uff0c\u4ece\u800c\u5bfc\u81f4\u4e0d\u6b63\u786e\u7684\u4f59\u989d\u3002<\/p>\n
\u6ce8\u610f\uff1a<\/strong><\/p>\n
    \n
  • \u53ea\u6709\u5bf9\u5171\u4eab\u53ef\u53d8\u6570\u636e\u7684\u8bbf\u95ee\u624d\u9700\u8981\u540c\u6b65\u3002\u5982\u679c\u6570\u636e\u662f\u4e0d\u53ef\u53d8\u7684\u6216\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u5219\u65e0\u9700\u540c\u6b65\u3002<\/li>\n
  • \u540c\u6b65\u51fd\u6570\u4f1a\u964d\u4f4e\u6027\u80fd\uff0c\u56e0\u4e3a\u5b83\u4eec\u4f1a\u5f15\u5165\u9501\u4e89\u7528\u3002\u56e0\u6b64\uff0c\u5e94\u8c28\u614e\u4f7f\u7528\u5b83\u4eec\u3002<\/li>\n
  • \u9664\u4e86\u4f7f\u7528 synchronized<\/code> \u5173\u952e\u5b57\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528 ReentrantLock<\/code>\u3001Semaphore<\/code> \u6216 locks<\/code> \u7b49\u9501\u5de5\u5177\u6765\u5b9e\u73b0\u540c\u6b65\u3002<\/li>\n<\/ul>\n
    \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u5728 Java \u4e2d\u58f0\u660e\u540c\u6b65\u51fd\u6570...<\/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-202808","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202808","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=202808"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202808\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202808"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}