{"id":951,"date":"2017-03-17T13:11:19","date_gmt":"2017-03-17T05:11:19","guid":{"rendered":"http:\/\/www.yusian.com\/blog\/?p=951"},"modified":"2017-03-17T14:01:18","modified_gmt":"2017-03-17T06:01:18","slug":"java%e5%9f%ba%e7%a1%80%e4%b9%8bsynchronized%e5%90%8c%e6%ad%a5%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.yusian.com\/blog\/java\/2017\/03\/17\/131119951.html","title":{"rendered":"Java\u57fa\u7840\u4e4bsynchronized\u540c\u6b65\u7684\u4f7f\u7528"},"content":{"rendered":"<p>0\u3001\u6709\u5173\u591a\u7ebf\u7a0b\u7684\u5b9e\u73b0\u5148\u53c2\u8003\uff1a<a href=\"http:\/\/www.yusian.com\/blog\/java\/2017\/03\/17\/140012.html\" target=\"_blank\">Java\u57fa\u7840\u4e4b\u591a\u7ebf\u7a0b\u7684\u57fa\u672c\u5b9e\u73b0<\/a><br \/>\n1\u3001\u4e24\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u540c\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5982\u679c\u6ca1\u6709\u540c\u6b65\u7684\u9650\u5236\uff0c\u4f1a\u51fa\u73b0\u4e00\u4e2a\u610f\u60f3\u4e0d\u540c\u7684\u95ee\u9898\uff1b<br \/>\n2\u3001\u6bd4\u5982\u5bf9\u8c61\u6210\u5458\u5c5e\u6027int i = 100\uff1b\u67d0\u65b9\u6cd5\u6bcf\u6267\u884c\u4e00\u6b21\u90fd\u4f1a\u5bf9\u8be5\u503c\u8fdb\u884c\u51cf1\u64cd\u4f5c\uff0c\u76f4\u63a5\u4e3a0\u7ed3\u675f\uff1b<br \/>\n3\u3001\u5355\u6b21\u8c03\u7528\u7684\u57fa\u672c\u6d41\u7a0b\u5e94\u8be5\u662f\uff1astart->{body}->end;\u4f46\u4ecestart\u5230end\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u9700\u8981\u65f6\u95f4\u7684\uff1b<br \/>\n4\u3001\u5047\u8bbe\u662f\u5b8c\u6574\u8fc7\u7a0b\u662fA->B->C\uff0c\u5982\u679c\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u6267\u884c\u5219\u4f1a\u51fa\u73b0A\u8c03\u7528\u8fd8\u672a\u7ed3\u675fB\u5373\u5f00\u59cb\u8c03\u7528\uff1b<br \/>\n5\u3001\u7406\u60f3\u7684\u8fc7\u7a0b\u662fA1->B1->C1->A2->B2->C2->A3->B3->C3\uff0c\u4e24\u4e2a\u7ebf\u7a0b\u4e00\u8d77\u6765\u5219\u4f1a\u51fa\u73b0A1->A2->B1->C1->B2->C2\uff1b<br \/>\n6\u3001\u4e3a\u4e86\u4fdd\u8bc1A->B->C\u8fd9\u4e09\u6b65\u80fd\u4e0d\u88ab\u4e2d\u65ad\uff0c\u5b8c\u6574\u5730\u4e00\u4e2a\u4e00\u4e2a\u6267\u884c\uff0c\u5219\u9700\u8981\u5bf9A->B->C\u8fdb\u884c\u52a0\u9501\u4fdd\u62a4\uff1b<br \/>\n7\u3001\u52a0\u9501\u4fdd\u62a4\u5373\u4f7f\u4e4b\u540c\u6b65\uff0c\u4f7f\u5f00\u59cbA\u5c31\u5230C\u4e4b\u540e\u518d\u91cd\u65b0\u5f00\u542f\u4e00\u4e2a\u65b0\u8fc7\u7a0b\uff1b<br \/>\n8\u3001\u4ee3\u7801\u5757\u9700\u8981\u52a0\u9501\u5219\u4f7f\u7528\u4fee\u9970\u8bcdsynchronized(){}\u5c06\u4ee3\u7801\u5305\u542b\u5728\u5927\u62ec\u53f7\u5185\uff1b<br \/>\n9\u3001\u6574\u4e2a\u65b9\u6cd5\u9700\u8981\u52a0\u9501\u5219\u5728\u65b9\u6cd5\u4fee\u9970\u8bcd\u4e2d\u52a0synchronized\u5173\u952e\u5b57<br \/>\n\u53c2\u8003\u4ee3\u7801\uff1a<\/p>\n<pre line=\"1\" lang=\"java\">\nclass Demo{\n\tpublic static void main(String [] args){\n\t\t\/\/ \u521b\u5efa\u4e00\u4e2aService\u5bf9\u8c61\uff0c\u4f7f\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u5bf9\u8be5\u5bf9\u8c61\u8fdb\u884c\u64cd\u4f5c\n\t\tService service = new Service();\n\t\t\/\/ \u7ebf\u7a0b1\u8bbf\u95eeService\u5bf9\u8c61\u7684\u7b2c\u4e00\u4e2a\u65b9\u6cd5\uff0c\u56e0\u4e3a\u540c\u6b65\u65b9\u6cd5\uff0cservice\u5bf9\u8c61\u4f1a\u88ab\u9501\u5b9a\n\t\tThread thread1 = new Thread(new Runnable(){\n\t\t\tpublic void run(){\n\t\t\t\tservice.fun1();\n\t\t\t}\n\t\t});\n\t\t\/\/ \u7ebf\u7a0b2\u8bbf\u95eeService\u5bf9\u8c61\u7684\u7b2c\u4e8c\u4e2a\u65b9\u6cd5\n\t\t\/\/ \u7531\u4e8e\u7b2c\u4e8c\u4e2a\u65b9\u6cd5\u5305\u542bsynchronized\u4fee\u9970\n\t\t\/\/ \u5e76\u4e14\u540c\u6b65\u52a0\u9501\u7684\u662fservice\u5bf9\u8c61\u672c\u8eab\uff1b\n\t\t\/\/ \u6240\u4ee5\u7ebf\u7a0b2\u53ea\u80fd\u7b49\u5f85service\u89e3\u9501\u540e\u624d\u80fd\u6267\u884c\n\t\tThread thread2 = new Thread(new Runnable(){\n\t\t\tpublic void run(){\n\t\t\t\tservice.fun2();\n\t\t\t}\n\t\t});\n\t\tthread1.start();\n\t\tthread2.start();\n\t}\n\t\n}\n\/\/ \u540c\u6b65\u65b9\u6cd5\u7684\u4e24\u79cd\u5199\u6cd5\nclass Service{\n\t\/\/ 1\u3001\u5728\u65b9\u6cd5\u4fee\u9970\u8bcd\u524d\u52a0synchronized\n\tpublic synchronized void fun1(){\n\t\ttry{\n\t\t\tThread.sleep(3000);\n\t\t}catch(Exception e){\n\t\t\tSystem.out.println(e);\n\t\t}\n\t\tSystem.out.println(\"fun1\");\n\t}\n\t\/\/ 2\u3001\u5728\u4ee3\u7801\u5757\u4e2d\u52a0synchronized(){}\u6765\u4fee\u9970\n\tpublic void fun2(){\n\t\tsynchronized(this){\n\t\t\tSystem.out.println(\"fun2\");\n\t\t}\n\t}\n}<\/pre>\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<br \/>\nfun1<br \/>\nfun2<br \/>\n\u8bf4\u660e\u7ebf\u7a0b2\u5728\u7b49\u5f85\u7ebf\u7a0b1\u7ed3\u675f\u540e\u624d\u6267\u884c\uff0c\u5982\u679c\u5c06\u65b9\u6cd5fun2\u91cc\u7684synchronized\u4fee\u9970\u8bcd\u53bb\u6389\u5219\u7ebf\u7a0b2\u4f1a\u5148\u6267\u884c\u5b8c\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>0\u3001\u6709\u5173\u591a\u7ebf\u7a0b\u7684\u5b9e\u73b0\u5148\u53c2\u8003\uff1aJava\u57fa\u7840\u4e4b\u591a\u7ebf\u7a0b\u7684\u57fa\u672c\u5b9e\u73b0 1\u3001\u4e24\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u540c\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5982\u679c\u6ca1\u6709\u540c\u6b65\u7684\u9650\u5236\uff0c\u4f1a\u51fa\u73b0\u4e00\u4e2a\u610f\u60f3\u4e0d\u540c\u7684\u95ee\u9898\uff1b 2\u3001\u6bd4\u5982\u5bf9\u8c61\u6210\u5458\u5c5e\u6027int i = 100\uff1b\u67d0\u65b9\u6cd5\u6bcf\u6267\u884c\u4e00\u6b21\u90fd\u4f1a\u5bf9\u8be5\u503c\u8fdb\u884c\u51cf1\u64cd\u4f5c\uff0c\u76f4\u63a5\u4e3a0\u7ed3\u675f\uff1b 3\u3001\u5355\u6b21\u8c03\u7528\u7684\u57fa\u672c\u6d41\u7a0b\u5e94\u8be5\u662f\uff1astart->{body}->end;\u4f46\u4ecestart\u5230end\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u9700\u8981\u65f6\u95f4\u7684\uff1b 4\u3001\u5047\u8bbe\u662f\u5b8c\u6574\u8fc7\u7a0b\u662fA->B->C\uff0c\u5982\u679c\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u6267\u884c\u5219\u4f1a\u51fa\u73b0A\u8c03\u7528\u8fd8\u672a\u7ed3\u675fB\u5373\u5f00\u59cb\u8c03\u7528\uff1b 5\u3001\u7406\u60f3\u7684\u8fc7\u7a0b\u662fA1->B1->C1->A2->B2->C2->A3->B3->C3\uff0c\u4e24\u4e2a\u7ebf\u7a0b\u4e00\u8d77\u6765\u5219\u4f1a\u51fa\u73b0A1->A2->B1->C1->B2->C2\uff1b 6\u3001\u4e3a\u4e86\u4fdd\u8bc1A->B->C\u8fd9\u4e09\u6b65\u80fd\u4e0d\u88ab\u4e2d\u65ad\uff0c\u5b8c\u6574\u5730\u4e00\u4e2a\u4e00\u4e2a\u6267\u884c\uff0c\u5219\u9700\u8981\u5bf9A->B->C\u8fdb\u884c\u52a0\u9501\u4fdd\u62a4\uff1b 7\u3001\u52a0\u9501\u4fdd\u62a4\u5373\u4f7f\u4e4b\u540c\u6b65\uff0c\u4f7f\u5f00\u59cbA\u5c31\u5230C\u4e4b\u540e\u518d\u91cd\u65b0\u5f00\u542f\u4e00\u4e2a\u65b0\u8fc7\u7a0b\uff1b 8\u3001\u4ee3\u7801\u5757\u9700\u8981\u52a0\u9501\u5219\u4f7f\u7528\u4fee\u9970\u8bcdsynchronized(){}\u5c06\u4ee3\u7801\u5305\u542b\u5728\u5927\u62ec\u53f7\u5185\uff1b 9\u3001\u6574\u4e2a\u65b9\u6cd5\u9700\u8981\u52a0\u9501\u5219\u5728\u65b9\u6cd5\u4fee\u9970\u8bcd\u4e2d\u52a0synchronized\u5173\u952e\u5b57 \u53c2\u8003\u4ee3\u7801\uff1a class Demo{ public static void main(String [] args){ \/\/ \u521b\u5efa\u4e00\u4e2aService\u5bf9\u8c61\uff0c\u4f7f\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u5bf9\u8be5\u5bf9\u8c61\u8fdb\u884c\u64cd\u4f5c Service service = new Service(); \/\/ \u7ebf\u7a0b1\u8bbf\u95eeService\u5bf9\u8c61\u7684\u7b2c\u4e00\u4e2a\u65b9\u6cd5\uff0c\u56e0\u4e3a\u540c\u6b65\u65b9\u6cd5\uff0cservice\u5bf9\u8c61\u4f1a\u88ab\u9501\u5b9a Thread thread1 = new Thread(new Runnable(){ public void run(){ service.fun1(); } }); \/\/ \u7ebf\u7a0b2\u8bbf\u95eeService\u5bf9\u8c61\u7684\u7b2c\u4e8c\u4e2a\u65b9\u6cd5 \/\/ \u7531\u4e8e\u7b2c\u4e8c\u4e2a\u65b9\u6cd5\u5305\u542bsynchronized\u4fee\u9970 \/\/ \u5e76\u4e14\u540c\u6b65\u52a0\u9501\u7684\u662fservice\u5bf9\u8c61\u672c\u8eab\uff1b \/\/ \u6240\u4ee5\u7ebf\u7a0b2\u53ea\u80fd\u7b49\u5f85service\u89e3\u9501\u540e\u624d\u80fd\u6267\u884c Thread thread2 = new [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[34,20],"class_list":["post-951","post","type-post","status-publish","format-standard","hentry","category-java","tag-java","tag-basics"],"_links":{"self":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/951","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/comments?post=951"}],"version-history":[{"count":0,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/951\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/media?parent=951"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/categories?post=951"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/tags?post=951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}