{"id":202786,"date":"2025-05-22T09:13:48","date_gmt":"2025-05-22T01:13:48","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202786\/"},"modified":"2025-05-22T09:13:48","modified_gmt":"2025-05-22T01:13:48","slug":"%e5%a4%9a%e7%ba%bf%e7%a8%8b%e7%8e%af%e5%a2%83%e4%b8%8bjava%e5%87%bd%e6%95%b0%e5%a4%b1%e6%95%88%e7%9a%84%e6%9c%80%e4%bd%b3%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202786\/","title":{"rendered":"\u591a\u7ebf\u7a0b\u73af\u5883\u4e0bJava\u51fd\u6570\u5931\u6548\u7684\u6700\u4f73\u5b9e\u8df5"},"content":{"rendered":"

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

\u591a\u7ebf\u7a0b\u73af\u5883\u4e0bJava\u51fd\u6570\u5931\u6548\u7684\u6700\u4f73\u5b9e\u8df5<\/h1>\n

\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\u591a\u7ebf\u7a0b\u73af\u5883\u4e0bJava\u51fd\u6570\u5931\u6548\u7684\u6700\u4f73\u5b9e\u8df5\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>\n

\u4e3a\u4e86\u9632\u6b62 Java \u51fd\u6570\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u5931\u6548\uff0c\u5efa\u8bae\u4f7f\u7528\u6700\u4f73\u5b9e\u8df5\uff1a\u786e\u4fdd\u51fd\u6570\u64cd\u4f5c\u4e0d\u53ef\u53d8\u5bf9\u8c61\uff0c\u907f\u514d\u6570\u636e\u7ade\u4e89\u3002\u4f7f\u7528\u7ebf\u7a0b\u5b89\u5168\u5bb9\u5668\u5b58\u50a8\u5171\u4eab\u6570\u636e\uff0c\u5982 ConcurrentHashMap\u3002\u5bf9\u9700\u8981\u4fee\u6539\u5171\u4eab\u72b6\u6001\u7684\u51fd\u6570\u4f7f\u7528 synchronized \u540c\u6b65\u65b9\u6cd5\u3002\u5bf9\u4e8e\u7b80\u5355\u7684\u72b6\u6001\u66f4\u65b0\uff0c\u4f7f\u7528\u539f\u5b50\u64cd\u4f5c\u4fdd\u8bc1\u539f\u5b50\u6027\u3002\u4f7f\u7528\u5b88\u62a4\u8fdb\u7a0b\u7ebf\u7a0b\u5728\u540e\u53f0\u6267\u884c\u4e0d\u9700\u8981\u4ea4\u4e92\u7684\u4efb\u52a1\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u5931\u6548\u7684\u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n

\u591a\u7ebf\u7a0b\u7f16\u7a0b\u4e2d\uff0c\u5728\u51fd\u6570\u6267\u884c\u671f\u95f4\u7ebf\u7a0b\u53d1\u751f\u5207\u6362\u53ef\u80fd\u4f1a\u5bfc\u81f4\u610f\u5916\u884c\u4e3a\u548c\u5931\u6548\u3002\u672c\u6587\u5c06\u8ba8\u8bba\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u9632\u6b62 Java \u51fd\u6570\u5931\u6548\u7684\u6700\u4f73\u5b9e\u8df5\uff0c\u5e76\u63d0\u4f9b\u5b9e\u6218\u6848\u4f8b\u52a0\u4ee5\u8bf4\u660e\u3002<\/p>\n

\u4e0d\u53ef\u53d8\u6027<\/strong><\/p>\n

\u786e\u4fdd\u51fd\u6570\u64cd\u4f5c\u7684\u662f\u4e0d\u53ef\u53d8\u5bf9\u8c61\u3002\u4e0d\u53ef\u53d8\u5bf9\u8c61\u4e00\u65e6\u521b\u5efa\uff0c\u5c31\u4e0d\u80fd\u66f4\u6539\u5176\u5185\u90e8\u72b6\u6001\uff0c\u4ece\u800c\u907f\u514d\u4e86\u5e76\u53d1\u8bbf\u95ee\u5bfc\u81f4\u7684\u6570\u636e\u7ade\u4e89\u548c\u5931\u6548\u3002<\/p>\n

\u5b9e\u6218\u6848\u4f8b:<\/strong><\/p>\n

class ImmutableCounter {\n    private final int count;\n\n    public ImmutableCounter(int count) {\n        this.count = count;\n    }\n\n    public int getCount() {\n        return count;\n    }\n}<\/pre>\n
\u7ebf\u7a0b\u5b89\u5168\u5bb9\u5668<\/strong><\/p>\n
\u4f7f\u7528\u7ebf\u7a0b\u5b89\u5168\u5bb9\u5668\uff08\u5982 ConcurrentHashMap<\/code> \u6216 CopyOnWriteArrayList<\/code>\uff09\u5b58\u50a8\u5171\u4eab\u6570\u636e\u3002\u8fd9\u4e9b\u5bb9\u5668\u63d0\u4f9b\u4e86\u5185\u7f6e\u7684\u540c\u6b65\u673a\u5236\uff0c\u786e\u4fdd\u5e76\u53d1\u8bbf\u95ee\u65f6\u7684\u7ebf\u7a0b\u5b89\u5168\u3002<\/p>\n
\u5b9e\u6218\u6848\u4f8b:<\/strong><\/p>\n
Map<String, Integer> counts = new ConcurrentHashMap<>();\n\npublic void incrementCount(String key) {\n    counts.computeIfAbsent(key, k -> new Integer(0));\n    counts.computeIfPresent(key, (k, v) -> v + 1);\n}<\/pre>\n
\u540c\u6b65\u65b9\u6cd5<\/strong><\/p>\n
\u5982\u679c\u51fd\u6570\u9700\u8981\u4fee\u6539\u5171\u4eab\u72b6\u6001\uff0c\u53ef\u4ee5\u4f7f\u7528 synchronized<\/code> \u5173\u952e\u5b57\u5c06\u65b9\u6cd5\u540c\u6b65\u3002\u8fd9\u5c06\u786e\u4fdd\u540c\u4e00\u65f6\u95f4\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u8be5\u51fd\u6570\uff0c\u4ece\u800c\u907f\u514d\u6570\u636e\u7ade\u4e89\u3002<\/p>\n
\u5b9e\u6218\u6848\u4f8b:<\/strong><\/p>\n
public class BankAccount {\n    private int balance;\n\n    public synchronized void deposit(int amount) {\n        balance += amount;\n    }\n}<\/pre>\n
\u539f\u5b50\u64cd\u4f5c<\/strong><\/p>\n
\u5bf9\u4e8e\u7b80\u5355\u7684\u72b6\u6001\u66f4\u65b0\uff0c\u53ef\u4ee5\u4f7f\u7528\u539f\u5b50\u64cd\u4f5c\uff08\u5982 AtomicInteger<\/code>\uff09\u4fdd\u8bc1\u539f\u5b50\u6027\uff0c\u907f\u514d\u7ebf\u7a0b\u7ade\u4e89\u3002<\/p>\n
\u5b9e\u6218\u6848\u4f8b:<\/strong><\/p>\n
AtomicInteger counter = new AtomicInteger(0);\n\npublic void incrementCounter() {\n    counter.incrementAndGet();\n}<\/pre>\n
\u5b88\u62a4\u8fdb\u7a0b\u7ebf\u7a0b<\/strong><\/p>\n
\u5bf9\u4e8e\u4e0d\u9700\u8981\u4ea4\u4e92\u6216\u7b49\u5f85\u4efb\u52a1\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b88\u62a4\u8fdb\u7a0b\u7ebf\u7a0b\u5728\u540e\u53f0\u6267\u884c\u3002\u8fd9\u5c06\u9632\u6b62\u4e3b\u7ebf\u7a0b\u963b\u585e\uff0c\u5373\u4f7f\u51fd\u6570\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u5931\u6548\u3002<\/p>\n
\u5b9e\u6218\u6848\u4f8b:<\/strong><\/p>\n
Thread thread = new Thread(() -> {\n    while (!Thread.interrupted()) {\n        \/\/ \u6267\u884c\u4efb\u52a1\n    }\n});\nthread.setDaemon(true);\nthread.start();<\/pre>\n
\u901a\u8fc7\u9075\u5faa\u8fd9\u4e9b\u6700\u4f73\u5b9e\u8df5\uff0c\u53ef\u4ee5\u663e\u8457\u964d\u4f4e\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d Java \u51fd\u6570\u5931\u6548\u7684\u53ef\u80fd\u6027\uff0c\u4ece\u800c\u63d0\u9ad8\u5e76\u53d1\u4ee3\u7801\u7684\u53ef\u9760\u6027\u548c\u9c81\u68d2\u6027\u3002<\/p>\n
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\u591a\u7ebf\u7a0b\u73af\u5883\u4e0bJava\u51fd\u6570\u5931\u6548\u7684\u6700...<\/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-202786","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202786","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=202786"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202786\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}