{"id":498,"date":"2023-11-30T13:32:18","date_gmt":"2023-11-30T05:32:18","guid":{"rendered":"http:\/\/mapleleaf666.vip\/?p=498"},"modified":"2023-11-30T13:32:19","modified_gmt":"2023-11-30T05:32:19","slug":"java%e6%80%bb%e7%bb%93%ef%bc%882%ef%bc%89-%e5%b9%b6%e5%8f%91%e7%bc%96%e7%a8%8b","status":"publish","type":"post","link":"http:\/\/mapleleaf666.vip\/?p=498","title":{"rendered":"Java\u603b\u7ed3\uff082\uff09\u2013\u5e76\u53d1\u7f16\u7a0b"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">\u60b2\u89c2\u9501<\/h3>\n\n\n\n<p>\u603b\u662f\u5047\u8bbe\u6700\u574f\u60c5\u51b5\uff0c\u5373\u5171\u4eab\u8d44\u6e90\u6bcf\u6b21\u88ab\u8bbf\u95ee\u7684\u65f6\u5019\u5c31\u4f1a\u51fa\u73b0\u95ee\u9898\u3002<strong>\u5373\u5171\u4eab\u8d44\u6e90\u6bcf\u6b21\u53ea\u7ed9\u4e00\u4e2a\u7ebf\u7a0b\u4f7f\u7528\uff0c\u5176\u5b83\u7ebf\u7a0b\u963b\u585e\uff0c\u7528\u5b8c\u540e\u518d\u628a\u8d44\u6e90\u8f6c\u8ba9\u7ed9\u5176\u5b83\u7ebf\u7a0b<\/strong>\u3002<\/p>\n\n\n\n<p>\u72ec\u5360\u9501\uff1asynchronized\u3001ReentrantLock<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7f3a\u70b9\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9ad8\u5e76\u53d1\u60c5\u51b5\u6613\u9020\u6210\u7ebf\u7a0b\u963b\u585e<\/li>\n\n\n\n<li>\u5927\u91cf\u963b\u585e\u5e26\u6765\u9891\u7e41\u7684\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u589e\u52a0\u7cfb\u7edf\u6027\u80fd\u5f00\u9500<\/li>\n\n\n\n<li>\u6613\u9020\u6210\u6b7b\u9501<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u5e38\u7528\u573a\u666f<\/h4>\n\n\n\n<p>\u7528\u4e8e\u5199\u6bd4\u8f83\u591a\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u907f\u514d\u9891\u7e41\u5931\u8d25\u548c\u91cd\u8bd5\u5f71\u54cd\u6027\u80fd\uff0c\u5b83\u7684\u5f00\u9500\u662f\u56fa\u5b9a\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e50\u89c2\u9501<\/h3>\n\n\n\n<p>\u603b\u662f\u5047\u8bbe\u6700\u597d\u7684\u60c5\u51b5\uff0c\u8ba4\u4e3a\u5171\u4eab\u8d44\u6e90\u6bcf\u6b21\u88ab\u8bbf\u95ee\u7684\u65f6\u5019\u4e0d\u4f1a\u51fa\u73b0\u95ee\u9898\uff0c\u7ebf\u7a0b\u53ef\u4ee5\u4e0d\u505c\u5730\u6267\u884c\uff0c\u65e0\u9700\u52a0\u9501\u4e5f\u65e0\u9700\u7b49\u5f85\u3002\u53ea\u662f\u5728<strong>\u63d0\u4ea4\u4fee\u6539\u7684\u65f6\u5019\u53bb\u9a8c\u8bc1\u5bf9\u5e94\u7684\u8d44\u6e90\u662f\u5426\u88ab\u5176\u5b83\u7ebf\u7a0b\u4fee\u6539<\/strong>\u4e86\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f18\u70b9\uff1a<\/h4>\n\n\n\n<p>\u4e0d\u5b58\u5728\u9501\u7ade\u4e89\u9020\u6210\u7ebf\u7a0b\u963b\u585e\uff0c\u4e5f\u4e0d\u4f1a\u6709\u6b7b\u9501\u7684\u95ee\u9898\uff0c\u5728\u6027\u80fd\u4e0a\u5f80\u5f80\u4f1a\u66f4\u80dc\u4e00\u7b79<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7f3a\u70b9<\/h4>\n\n\n\n<p>\u5982\u679c\u51b2\u7a81\u9891\u7e41\u53d1\u751f\uff08\u5199\u5360\u6bd4\u975e\u5e38\u591a\u7684\u60c5\u51b5\uff09\uff0c\u4f1a\u9891\u7e41\u5931\u8d25\u548c\u91cd\u8bd5\uff0c\u5f88\u5f71\u54cd\u6027\u80fd\u3002<\/p>\n\n\n\n<p>\u539f\u5b50\u53d8\u91cf\u7c7b\uff1aAtomicInteger\u3001LongAdder<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5e38\u89c1\u95ee\u9898<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ABA\u95ee\u9898\uff1a\u67d0\u6bb5\u65f6\u95f4\u53d8\u91cf\u7684\u503c\u53ef\u80fd\u88ab\u6539\u4e3a\u5176\u4ed6\u503c\uff0c\u7136\u540e\u53c8\u6539\u56de A\u3002\u5355\u7eafCAS\u4f1a\u8bef\u8ba4\u4e3a\u5176\u6ca1\u4fee\u6539\u3002\u89e3\u51b3\u65b9\u6cd5\u662f\u6dfb\u52a0<strong>\u7248\u672c\u53f7<\/strong>\u6216<strong>\u65f6\u95f4\u6233<\/strong><\/li>\n\n\n\n<li>\u5faa\u73af\u65f6\u95f4\u957f\u5f00\u9500\u5927\uff1aCAS\u7528\u5230\u81ea\u65cb\u64cd\u4f5c\u6765\u8fdb\u884c\u91cd\u8bd5\uff0c\u4e5f\u5c31\u662f\u4e0d\u6210\u529f\u5c31\u4e00\u76f4\u5faa\u73af\u6267\u884c\u76f4\u5230\u6210\u529f\uff0c\u5bb9\u6613\u9020\u6210\u5de8\u5927\u5f00\u9500\u3002\u4f7f\u7528pause\u6307\u4ee4\u53ef\u4ee5\u7f13\u89e3\uff1a1.\u5ef6\u8fdf\u6d41\u6c34\u7ebf\u6267\u884c\uff1b2.\u907f\u514d\u9000\u51fa\u5faa\u73af\u65f6\u56e0\u5185\u5b58\u987a\u5e8f\u51b2\u7a81\u5bfc\u81f4CPU\u6d41\u6c34\u7ebf\u88ab\u6e05\u7a7a\u3002<\/li>\n\n\n\n<li>\u53ea\u80fd\u4fdd\u8bc1\u4e00\u4e2a\u5171\u4eab\u53d8\u91cf\u7684\u539f\u5b50\u64cd\u4f5c\uff1aCAS \u53ea\u5bf9\u5355\u4e2a\u5171\u4eab\u53d8\u91cf\u6709\u6548\uff0c\u5f53\u64cd\u4f5c\u6d89\u53ca\u8de8\u591a\u4e2a\u5171\u4eab\u53d8\u91cf\u65f6 CAS \u65e0\u6548\u3002\u89e3\u51b3\u65b9\u6cd5\uff1a\u7528AtomicReference\uff08\u628a\u591a\u4e2a\u53d8\u91cf\u653e\u5728\u4e00\u4e2a\u5bf9\u8c61\u91cc\u6765\u8fdb\u884c CAS \u64cd\u4f5c\uff09\uff0c\u76f8\u5f53\u4e8e\u628a\u591a\u4e2a\u5171\u4eab\u53d8\u91cf\u5408\u5e76\u6210\u4e00\u4e2a\u5171\u4eab\u53d8\u91cf\u6765\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u5e38\u7528\u573a\u666f<\/h4>\n\n\n\n<p>\u901a\u5e38\u591a\u4e8e\u5199\u6bd4\u8f83\u5c11\u7684\u60c5\u51b5\u4e0b\uff08\u591a\u8bfb\u573a\u666f\uff0c\u7ade\u4e89\u8f83\u5c11\uff09\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u9891\u7e41\u52a0\u9501\u5f71\u54cd\u6027\u80fd\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e50\u89c2\u9501\u5b9e\u73b0<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u7248\u672c\u53f7\u673a\u5236<\/h4>\n\n\n\n<p>\u6570\u636e\u8868\u4e2d\u52a0\u4e0a\u4e00\u4e2a\u6570\u636e\u7248\u672c\u53f7 <code>version<\/code> \u5b57\u6bb5\uff0c\u8868\u793a\u6570\u636e\u88ab\u4fee\u6539\u7684\u6b21\u6570\uff0c\u4fee\u6539\u65f6version+1\u3002\u5f53\u7ebf\u7a0b A \u8981\u66f4\u65b0\u6570\u636e\u503c\u65f6\uff0c\u5728\u8bfb\u53d6\u6570\u636e\u7684\u540c\u65f6\u4e5f\u4f1a\u8bfb\u53d6 <code>version<\/code> \u503c\uff0c\u5728\u63d0\u4ea4\u66f4\u65b0\u65f6\uff0c\u82e5\u521a\u624d\u8bfb\u53d6\u5230\u7684 version \u503c\u4e3a\u5f53\u524d\u6570\u636e\u5e93\u4e2d\u7684 <code>version<\/code> \u503c\u76f8\u7b49\u65f6\u624d\u66f4\u65b0\uff0c\u5426\u5219\u91cd\u8bd5\u66f4\u65b0\u64cd\u4f5c\uff0c\u76f4\u5230\u66f4\u65b0\u6210\u529f\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">CAS\u7b97\u6cd5<\/h4>\n\n\n\n<p>\u7528\u4e00\u4e2a\u9884\u671f\u503c\u548c\u8981\u66f4\u65b0\u7684\u53d8\u91cf\u503c\u8fdb\u884c\u6bd4\u8f83\uff0c\u4e24\u503c\u76f8\u7b49\u624d\u4f1a\u8fdb\u884c\u66f4\u65b0<\/p>\n\n\n\n<p>CAS \u662f\u4e00\u4e2a<strong>\u539f\u5b50\u64cd\u4f5c<\/strong>\uff0c\u5e95\u5c42\u4f9d\u8d56\u4e8e\u4e00\u6761 CPU \u7684\u539f\u5b50\u6307\u4ee4\u3002<\/p>\n\n\n\n<p>CAS \u6d89\u53ca\u5230\u4e09\u4e2a\u64cd\u4f5c\u6570\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>V<\/strong>\uff1a\u8981\u66f4\u65b0\u7684\u53d8\u91cf\u503c(Var)<\/li>\n\n\n\n<li><strong>E<\/strong>\uff1a\u9884\u671f\u503c(Expected)<\/li>\n\n\n\n<li><strong>N<\/strong>\uff1a\u62df\u5199\u5165\u7684\u65b0\u503c(New)<\/li>\n<\/ul>\n\n\n\n<p>\u5f53\u4e14\u4ec5\u5f53 V \u7684\u503c\u7b49\u4e8e E \u65f6\uff0cCAS \u901a\u8fc7\u539f\u5b50\u65b9\u5f0f\u7528\u65b0\u503c N \u6765\u66f4\u65b0 V \u7684\u503c\u3002\u5982\u679c\u4e0d\u7b49\uff0c\u8bf4\u660e\u5df2\u7ecf\u6709\u5176\u5b83\u7ebf\u7a0b\u66f4\u65b0\u4e86 V\uff0c\u5219\u5f53\u524d\u7ebf\u7a0b\u653e\u5f03\u66f4\u65b0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u60b2\u89c2\u9501 \u603b\u662f\u5047\u8bbe\u6700\u574f\u60c5\u51b5\uff0c\u5373\u5171\u4eab\u8d44\u6e90\u6bcf\u6b21\u88ab\u8bbf\u95ee\u7684\u65f6\u5019\u5c31\u4f1a\u51fa\u73b0\u95ee\u9898\u3002\u5373\u5171\u4eab\u8d44\u6e90\u6bcf\u6b21\u53ea\u7ed9\u4e00\u4e2a\u7ebf\u7a0b\u4f7f\u7528\uff0c\u5176\u5b83\u7ebf\u7a0b\u963b\u585e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":499,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[33],"class_list":["post-498","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-note","tag-java"],"_links":{"self":[{"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=\/wp\/v2\/posts\/498","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=498"}],"version-history":[{"count":1,"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=\/wp\/v2\/posts\/498\/revisions"}],"predecessor-version":[{"id":500,"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=\/wp\/v2\/posts\/498\/revisions\/500"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=\/wp\/v2\/media\/499"}],"wp:attachment":[{"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=498"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/mapleleaf666.vip\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}