{"id":4086,"date":"2018-09-15T21:23:03","date_gmt":"2018-09-15T13:23:03","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=4086"},"modified":"2018-09-15T21:23:03","modified_gmt":"2018-09-15T13:23:03","slug":"java%e7%9a%84volatile%e5%92%8csynchronized%e5%ad%a6%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/4086.html","title":{"rendered":"Java\u7684volatile\u548csynchronized\u5b66\u4e60"},"content":{"rendered":"<p>=Start=<\/p>\n<h4 id=\"id-\u6a21\u677f-\u7f18\u7531\uff1a\">\u7f18\u7531\uff1a<\/h4>\n<p>\u5b66\u4e60\u6574\u7406\u3002\u65b9\u4fbf\u4ee5\u540e\u53c2\u8003\u3002<\/p>\n<h4 id=\"id-\u6a21\u677f-\u6b63\u6587\uff1a\">\u6b63\u6587\uff1a<\/h4>\n<h5 id=\"id-\u6a21\u677f-\u53c2\u8003\u89e3\u7b54\uff1a\">\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n<h6><strong>volatile\u7684\u4f5c\u7528\uff1a<\/strong><\/h6>\n<p><span style=\"color: #ff0000;\">volatile\u5173\u952e\u5b57\u7684\u4f5c\u7528\u662f\uff1a<strong>\u4f7f\u53d8\u91cf\u5728\u591a\u4e2a\u7ebf\u7a0b\u95f4\u53ef\u89c1\uff1b<\/strong><\/span>\u4f46\u4ec5\u9760volatile\u4e0d\u80fd\u4fdd\u8bc1\u7ebf\u7a0b\u7684\u5b89\u5168\u6027\u3002<\/p>\n<p>volatile\u4e3b\u8981\u7528\u5728\u591a\u4e2a\u7ebf\u7a0b\u5b9e\u4f8b\u611f\u77e5\u53d8\u91cf\u88ab\u66f4\u6539\u4e86\u7684\u573a\u5408\uff0c\u4ece\u800c\u4f7f\u5f97\u5404\u4e2a\u7ebf\u7a0b\u83b7\u5f97\u6700\u65b0\u7684\u503c\u3002\u5b83\u5f3a\u5236\u7ebf\u7a0b\u6bcf\u6b21\u4ece\u4e3b\u5185\u5b58\u4e2d\u8bfb\u53d6\u53d8\u91cf\uff0c\u800c\u4e0d\u662f\u4ece\u7ebf\u7a0b\u7684\u79c1\u6709\u5185\u5b58\u4e2d\u8bfb\u53d6\u53d8\u91cf\uff0c\u4ece\u800c\u4fdd\u8bc1\u4e86\u6570\u636e\u7684\u53ef\u89c1\u6027\u3002<\/p>\n<hr \/>\n<h6><strong>volatile\u548csynchronized\u7684\u533a\u522b\uff1a<\/strong><\/h6>\n<ul>\n<li><span style=\"color: #ff0000;\"><strong>volatile\u672c\u8d28\u662f\u5728\u544a\u8bc9jvm\u5f53\u524d\u53d8\u91cf\u5728\u5bc4\u5b58\u5668\uff08\u5de5\u4f5c\u5185\u5b58\uff09\u4e2d\u7684\u503c\u662f\u4e0d\u786e\u5b9a\u7684\uff0c\u9700\u8981\u4ece\u4e3b\u5b58\u4e2d\u8bfb\u53d6\uff1b<\/strong><\/span>synchronized\u5219\u662f\u9501\u5b9a\u5f53\u524d\u53d8\u91cf\uff0c\u53ea\u6709\u5f53\u524d\u7ebf\u7a0b\u53ef\u4ee5\u8bbf\u95ee\u8be5\u53d8\u91cf\uff0c\u5176\u4ed6\u7ebf\u7a0b\u88ab\u963b\u585e\u4f4f\u3002<\/li>\n<li>volatile\u4ec5\u80fd\u4f7f\u7528\u5728\u53d8\u91cf\u7ea7\u522b\uff1bsynchronized\u5219\u53ef\u4ee5\u4f7f\u7528\u5728\u53d8\u91cf\u3001\u65b9\u6cd5\u3001\u548c\u7c7b\u7ea7\u522b\u7684\u3002<\/li>\n<li><strong>volatile\u4ec5\u80fd\u5b9e\u73b0\u53d8\u91cf\u7684\u4fee\u6539\u53ef\u89c1\u6027\uff0c\u4e0d\u80fd\u4fdd\u8bc1\u539f\u5b50\u6027\uff1b\u800csynchronized\u5219\u53ef\u4ee5\u4fdd\u8bc1\u53d8\u91cf\u7684\u4fee\u6539\u53ef\u89c1\u6027\u548c\u539f\u5b50\u6027\u3002<\/strong><\/li>\n<li><span style=\"color: #ff0000;\">volatile\u4e0d\u4f1a\u9020\u6210\u7ebf\u7a0b\u7684\u963b\u585e\uff1bsynchronized\u53ef\u80fd\u4f1a\u9020\u6210\u7ebf\u7a0b\u7684\u963b\u585e\u3002<\/span><\/li>\n<li>volatile\u6807\u8bb0\u7684\u53d8\u91cf\u4e0d\u4f1a\u88ab\u7f16\u8bd1\u5668\u4f18\u5316\uff1bsynchronized\u6807\u8bb0\u7684\u53d8\u91cf\u53ef\u4ee5\u88ab\u7f16\u8bd1\u5668\u4f18\u5316\u3002<\/li>\n<\/ul>\n<hr \/>\n<pre class=\"lang:default decode:true \">package com.ixyzero.learn.multithread;\r\n\r\npublic class Run {\r\n    public static void main(String[] args) {\r\n        \/\/ try {\r\n        \/\/     RunThread thread = new RunThread();\r\n        \/\/     thread.start();\r\n        \/\/     Thread.sleep(1000);\r\n        \/\/     thread.setRunning(false);\r\n        \/\/ } catch (InterruptedException e) {\r\n        \/\/     e.printStackTrace();\r\n        \/\/ }\r\n\r\n        MyThread[] mythreadArray = new MyThread[100];\r\n        for (int i = 0; i &lt; 100; i++) {\r\n            mythreadArray[i] = new MyThread();\r\n        }\r\n        for (int i = 0; i &lt; 100; i++) {\r\n            mythreadArray[i].start();\r\n        }\r\n\r\n    }\r\n}\r\n\r\n\r\npublic class RunThread extends Thread {\r\n\r\n    volatile private boolean isRunning = true;\r\n\r\n    public boolean isRunning() {\r\n        return isRunning;\r\n    }\r\n\r\n    public void setRunning(boolean isRunning) {\r\n        this.isRunning = isRunning;\r\n    }\r\n\r\n    @Override\r\n    public void run() {\r\n        System.out.println(\"\u8fdb\u5165\u5230run\u65b9\u6cd5\u4e2d\u4e86\");\r\n        while (isRunning == true) {\r\n        }\r\n        System.out.println(\"\u7ebf\u7a0b\u6267\u884c\u5b8c\u6210\u4e86\");\r\n    }\r\n}\r\n\r\n\r\npublic class MyThread extends Thread {\r\n    public volatile static int count;\r\n\r\n    private static void addCount() {\r\n        for (int i = 0; i &lt; 100; i++) {\r\n            count++;\r\n        }\r\n        System.out.println(\"count=\" + count);\r\n    }\r\n\r\n    @Override\r\n    public void run() {\r\n        addCount();\r\n    }\r\n}\r\n<\/pre>\n<p>&nbsp;<\/p>\n<h5 id=\"id-\u6a21\u677f-\u53c2\u8003\u94fe\u63a5\uff1a\">\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n<ul>\n<li><a href=\"https:\/\/www.cnblogs.com\/hapjin\/p\/5492880.html\">JAVA\u591a\u7ebf\u7a0b\u4e4bvolatile \u4e0e synchronized \u7684\u6bd4\u8f83<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/suifeng3051\/article\/details\/52611310\">\u5168\u9762\u7406\u89e3Java\u5185\u5b58\u6a21\u578b<\/a><\/li>\n<li><a href=\"http:\/\/ifeve.com\/java-memory-model-1\/\">\u6df1\u5165\u7406\u89e3Java\u5185\u5b58\u6a21\u578b\uff08\u4e00\uff09\u2014\u2014\u57fa\u7840<\/a><br \/>\n<a href=\"http:\/\/www.infoq.com\/cn\/articles\/java-memory-model-1\">http:\/\/www.infoq.com\/cn\/articles\/java-memory-model-1<\/a><\/li>\n<li><a href=\"http:\/\/www.cnblogs.com\/hapjin\/p\/5452663.html\">JAVA\u591a\u7ebf\u7a0b\u4e4bSynchronized\u5173\u952e\u5b57&#8211;\u5bf9\u8c61\u9501\u7684\u7279\u70b9<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/zwan0518\/article\/details\/8725704\">\u3010Java\u3011 \u7c7b\u9501\u4e0e\u5bf9\u8c61\u9501\u52a0\u9501 synchronized \u5c0f\u89e3<\/a><\/li>\n<li><a href=\"https:\/\/www.ibm.com\/developerworks\/cn\/java\/j-jtp06197.html\">\u6b63\u786e\u4f7f\u7528 Volatile \u53d8\u91cf<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/suifeng3051\/article\/details\/52611233\">volatile\u548csynchronized\u7684\u533a\u522b<\/a><\/li>\n<li><a href=\"https:\/\/www.cnblogs.com\/wxw16\/p\/8926535.html\">Java\u591a\u7ebf\u7a0bvolatile\u548csynchronized\u603b\u7ed3<\/a><\/li>\n<li><a href=\"http:\/\/ifeve.com\/who-is-lock\/\">\u54ea\u4e2a\u5bf9\u8c61\u624d\u662f\u9501\uff1f<\/a><\/li>\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/3047564\/java-synchronized-method-lock-on-object-or-method\">Java synchronized method lock on object, or method?<\/a><\/li>\n<\/ul>\n<p>=END=<\/p>\n","protected":false},"excerpt":{"rendered":"<p>=Start= \u7f18\u7531\uff1a \u5b66\u4e60\u6574\u7406\u3002\u65b9\u4fbf\u4ee5\u540e\u53c2\u8003\u3002 \u6b63\u6587\uff1a \u53c2\u8003\u89e3\u7b54\uff1a volatile\u7684\u4f5c\u7528\uff1a volatil [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7],"tags":[61,1212,1211],"class_list":["post-4086","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-programing","tag-java","tag-synchronized","tag-volatile"],"views":3415,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=4086"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4086\/revisions"}],"predecessor-version":[{"id":4087,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4086\/revisions\/4087"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=4086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=4086"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=4086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}