{"id":744,"date":"2021-02-10T18:44:55","date_gmt":"2021-02-10T10:44:55","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/java\/?p=744"},"modified":"2021-02-10T22:07:16","modified_gmt":"2021-02-10T14:07:16","slug":"synchronized-%e5%90%8c%e6%ad%a5%e4%bb%a3%e7%a0%81%e5%9d%97","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/java\/post-744.html","title":{"rendered":"synchronized \u5173\u952e\u5b57"},"content":{"rendered":"\n<p>\u5f53\u591a\u7ebf\u7a0b\u8bbf\u95ee\u5171\u4eab\u6570\u636e\u65f6\uff0c\u5c31\u53ef\u80fd\u4f1a\u51fa\u73b0\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898<\/p>\n\n\n\n<p>\u4f7f\u7528 synchronized \u662f\u89e3\u51b3\u7ebf\u7a0b\u5b89\u5168\u7684\u5176\u4e2d\u4e00\u79cd\u65b9\u5f0f<\/p>\n\n\n\n<h5>1.synchronized \u540c\u6b65\u4ee3\u7801\u5757\u8bed\u6cd5<\/h5>\n\n\n\n<pre class=\"wp-block-code\"><code>synchronized(\u9501\u5bf9\u8c61){\n    \u53ef\u80fd\u51fa\u73b0\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u7684\u4ee3\u7801(\u5373\u8bbf\u95ee\u4e86\u5171\u4eab\u6570\u636e\u7684\u4ee3\u7801);\n}<\/code><\/pre>\n\n\n\n<p>\u6ce8\u610f\u4e8b\u9879\uff1a<\/p>\n\n\n\n<ul><li>\u540c\u6b65\u4ee3\u7801\u5757\u7684 &#8220;\u9501\u5bf9\u8c61&#8221; \u53ef\u4ee5\u662f\u4efb\u610f\u7c7b\u578b\u7684\u5bf9\u8c61<\/li><li>\u5fc5\u987b\u4fdd\u8bc1\u591a\u4e2a\u7ebf\u7a0b\u4f7f\u7528\u7684\u662f\u540c\u4e00\u4e2a\u9501\u5bf9\u8c61<\/li><li>\u9501\u5bf9\u8c61\u7684\u4f5c\u7528\uff1a\u53ea\u8ba9\u4e00\u4e2a\u7ebf\u7a0b\u5728\u540c\u6b65\u4ee3\u7801\u5757\u4e2d\u6267\u884c<\/li><\/ul>\n\n\n\n<h5>2. synchronized \u65b9\u6cd5<\/h5>\n\n\n\n<p>\u4f5c\u7528\u548c\u4ee3\u7801\u5757\u5dee\u4e0d\u591a\uff0c\u5199\u6cd5\u662f\u6210\u5458\u65b9\u6cd5\u7684\u8bed\u6cd5, \u5728\u8fd4\u56de\u503c\u4fee\u9970\u7b26\u524d\u52a0 synchronized<\/p>\n\n\n\n<p>\u53ef\u4ee5\u7406\u89e3\u4e3a\uff0c\u5b83\u662f\u4e00\u4e2a\u7528 this \u4f5c\u4e3a\u9501\u5bf9\u8c61\u7684\u540c\u6b65\u4ee3\u7801\u5757\uff0c\u65b9\u4fbf\u91cd\u590d\u8c03\u7528<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u8bbf\u95ee\u4fee\u9970\u7b26 synchronized \u8fd4\u56de\u503c\u4fee\u9970\u7b26 \u65b9\u6cd5\u540d(\u53c2\u6570\u5217\u8868){\n    \/\/\u65b9\u6cd5\u4f53;\n}<\/code><\/pre>\n\n\n\n<h5>3. synchronized \u9759\u6001\u65b9\u6cd5<\/h5>\n\n\n\n<p>\u4f5c\u7528\u548c\u4ee3\u7801\u5757\u5dee\u4e0d\u591a\uff0c\u5199\u6cd5\u662f\u9759\u6001\u65b9\u6cd5\u7684\u8bed\u6cd5, \u5728\u8fd4\u56de\u503c\u4fee\u9970\u7b26\u524d\u52a0 synchronized<\/p>\n\n\n\n<p>\u53ef\u4ee5\u7406\u89e3\u4e3a, \u5b83\u662f\u4f7f\u7528 \u672c\u7c7b\u7684class\u5c5e\u6027, \u5373class\u6587\u4ef6\u5bf9\u8c61\u4f5c\u4e3a\u9501\u5bf9\u8c61\u7684\u540c\u6b65\u4ee3\u7801\u5757<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u8bbf\u95ee\u4fee\u9970\u7b26 static synchronized \u8fd4\u56de\u503c\u4fee\u9970\u7b26 \u65b9\u6cd5\u540d(\u53c2\u6570\u5217\u8868){\n    \/\/\u65b9\u6cd5\u4f53;\n}<\/code><\/pre>\n\n\n\n<h5>4.\u4f8b\u5b50\uff08\u4ec5\u4f7f\u7528\u540c\u6b65\u4ee3\u7801\u5757\u793a\u4f8b\uff0c\u56e0\u4e3a\u540e\u4e24\u8005\u5b9e\u8d28\u76f8\u540c\uff0c\u53ea\u662f\u8bed\u6cd5\u7a0d\u6709\u5dee\u5f02)<\/h5>\n\n\n\n<p>\u521b\u5efa\u4e00\u4e2a RunnableImpl \u7c7b\uff0c\u5171\u6709100\u5f20\u7968\uff0c\u4e0d\u65ad\u552e\u5356\u76f4\u5230\u7968\u6570\u7b49\u4e8e0<\/p>\n\n\n\n<p>\u521b\u5efa\u4e00\u4e2a main \u65b9\u6cd5\uff0c\u8ba9 3 \u4e2a\u7ebf\u7a0b\u540c\u65f6\u5356\u7968\uff0c\u6b64\u65f6\u4e5f\u662f\u7ebf\u7a0b\u5b89\u5168\u7684<\/p>\n\n\n\n<p>\u5982\u679c\u53bb\u6389 synchronized \u4ee3\u7801\u5757\uff0c\u90a3\u4e48\u5c31\u4f1a\u51fa\u73b0\u5356\u4e0d\u5b58\u5728\u7684\u7968\uff0c\u91cd\u590d\u5356\u7968\u7684\u60c5\u51b5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class RunnableImpl implements Runnable{\n    \/\/\u5b9a\u4e49\u4e00\u4e2a\u591a\u4e2a\u7ebf\u7a0b\u5171\u4eab\u7684\u7968\u6e90\n    private  int ticket = 100;\n    \n    \/\/\u521b\u5efa\u4e00\u4e2a\u9501\u5bf9\u8c61\n    Object obj = new Object();\n\n    \/\/\u8bbe\u7f6e\u7ebf\u7a0b\u4efb\u52a1:\u5356\u7968\n    @Override\n    public void run() {\n        \/\/\u4f7f\u7528\u6b7b\u5faa\u73af,\u8ba9\u5356\u7968\u64cd\u4f5c\u91cd\u590d\u6267\u884c\n        while(true){\n        \tsynchronized(obj) {\n                \/\/\u5148\u5224\u65ad\u7968\u662f\u5426\u5b58\u5728\n                if(ticket&gt;0){\n                    \/\/\u63d0\u9ad8\u5b89\u5168\u95ee\u9898\u51fa\u73b0\u7684\u6982\u7387,\u8ba9\u7a0b\u5e8f\u7761\u7720\n                    try {\n                        Thread.sleep(10);\n                    } catch (InterruptedException e) {\n                        e.printStackTrace();\n                    }\n\n                    \/\/\u7968\u5b58\u5728,\u5356\u7968 ticket--\n                    System.out.println(Thread.currentThread().getName()+\"--&gt;\u6b63\u5728\u5356\u7b2c\"+ticket+\"\u5f20\u7968\");\n                    ticket--;\n                }\n        \t}\n        }\n    }\n    public static void main(String&#91;] args) {\n        \/\/\u521b\u5efaRunnable\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\u5bf9\u8c61\n        RunnableImpl run = new RunnableImpl();\n        \/\/\u521b\u5efaThread\u7c7b\u5bf9\u8c61,\u6784\u9020\u65b9\u6cd5\u4e2d\u4f20\u9012Runnable\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\u5bf9\u8c61\n        Thread t0 = new Thread(run);\n        Thread t1 = new Thread(run);\n        Thread t2 = new Thread(run);\n        \/\/\u8c03\u7528start\u65b9\u6cd5\u5f00\u542f\u591a\u7ebf\u7a0b\n        t0.start();\n        t1.start();\n        t2.start();\n    }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u591a\u7ebf\u7a0b\u8bbf\u95ee\u5171\u4eab\u6570\u636e\u65f6\uff0c\u5c31\u53ef\u80fd\u4f1a\u51fa\u73b0\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898 \u4f7f\u7528 synchronized \u662f\u89e3\u51b3\u7ebf\u7a0b\u5b89\u5168\u7684\u5176\u4e2d\u4e00\u79cd\u65b9\u5f0f&hellip; <a href=\"https:\/\/www.52dixiaowo.com\/java\/post-744.html\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">synchronized \u5173\u952e\u5b57<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[25],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/posts\/744"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/comments?post=744"}],"version-history":[{"count":0,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/posts\/744\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/media?parent=744"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/categories?post=744"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/tags?post=744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}