{"id":203045,"date":"2025-05-22T09:08:01","date_gmt":"2025-05-22T01:08:01","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203045\/"},"modified":"2025-05-22T09:08:01","modified_gmt":"2025-05-22T01:08:01","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e5%ae%9a%e4%b9%89-synchronized-%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203045\/","title":{"rendered":"\u5982\u4f55\u5728Java\u4e2d\u5b9a\u4e49 synchronized \u51fd\u6570"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u5728Java\u4e2d\u5b9a\u4e49 synchronized \u51fd\u6570<\/h1>\n<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300a\u5982\u4f55\u5728Java\u4e2d\u5b9a\u4e49 synchronized \u51fd\u6570\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n<p>\u5728 Java \u4e2d\u5b9a\u4e49 synchronized \u51fd\u6570\u65f6\uff0c\u53ea\u9700\u5728\u51fd\u6570\u7b7e\u540d\u4e2d\u6dfb\u52a0 synchronized \u5173\u952e\u5b57\uff0c\u4ece\u800c\u9632\u6b62\u5e76\u53d1\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u65f6\u7684\u6570\u636e\u4e0d\u4e00\u81f4\u95ee\u9898\u3002\u4f8b\u5982\uff1apublic synchronized void incrementCounter() {}\u3002\u5b9e\u6218\u4e2d\uff0c\u5bf9\u4e8e\u5171\u4eab\u8d44\u6e90\uff08\u5982\u7535\u5b50\u5546\u52a1\u7f51\u7ad9\u8d2d\u7269\u7bee\uff09\uff0c\u53ef\u4ee5\u5b9a\u4e49 synchronized \u51fd\u6570\uff08\u5982 addToCart \u548c getProducts\uff09\u786e\u4fdd\u6570\u636e\u7684\u7ebf\u7a0b\u5b89\u5168\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730027248671e1ef08a65d.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u5b9a\u4e49 synchronized \u51fd\u6570<\/strong><\/p>\n<p>synchronized \u51fd\u6570\u5728\u591a\u7ebf\u7a0b\u7f16\u7a0b\u4e2d\u975e\u5e38\u6709\u7528\uff0c\u5b83\u53ef\u4ee5\u5728\u5e76\u53d1\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u65f6\u9632\u6b62\u6570\u636e\u4e0d\u4e00\u81f4\u95ee\u9898\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a synchronized \u51fd\u6570\uff0c\u53ea\u9700\u5728\u51fd\u6570\u7b7e\u540d\u4e2d\u6dfb\u52a0 <code>synchronized<\/code> \u5173\u952e\u5b57\u5373\u53ef\u3002<\/p>\n<pre>public synchronized void incrementCounter() {\n   \/\/ \u6b64\u51fd\u6570\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u56e0\u4e3a\u5b83\u662f synchronized \u7684\n   counter++;\n}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8003\u8651\u4e00\u4e2a\u5171\u4eab\u8d44\u6e90\u573a\u666f\uff0c\u4f8b\u5982\u7535\u5b50\u5546\u52a1\u7f51\u7ad9\u4e0a\u7684\u8d2d\u7269\u7bee\u3002\u591a\u4e2a\u7ebf\u7a0b\uff08\u6765\u81ea\u4e0d\u540c\u7528\u6237\uff09\u53ef\u4ee5\u8bbf\u95ee\u540c\u4e00\u4e2a\u8d2d\u7269\u7bee\uff0c\u56e0\u6b64\u9700\u8981\u786e\u4fdd\u8d2d\u7269\u7bee\u7684\u66f4\u65b0\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u3002<\/p>\n<pre>public class ShoppingCart {\n\n   private List&lt;Product&gt; products;\n\n   public synchronized void addToCart(Product product) {\n       products.add(product);\n   }\n\n   public synchronized List&lt;Product&gt; getProducts() {\n       return Collections.unmodifiableList(products);\n   }\n\n}<\/pre>\n<p>\u5728\u672c\u4f8b\u4e2d\uff0c<code>addToCart<\/code> \u548c <code>getProducts<\/code> \u51fd\u6570\u90fd\u662f synchronized \u7684\uff0c\u4ee5\u786e\u4fdd\u591a\u4e2a\u7ebf\u7a0b\u5e76\u53d1\u8bbf\u95ee\u8d2d\u7269\u8f66\u65f6\u8d2d\u7269\u7bee\u6570\u636e\u7684\u51c6\u786e\u6027\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u5728Java\u4e2d\u5b9a\u4e49 synchronized \u51fd\u6570\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","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u5728Java\u4e2d\u5b9a\u4e49 synch&#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-203045","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203045","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=203045"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203045\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203045"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}