{"id":340,"date":"2016-05-15T04:02:28","date_gmt":"2016-05-15T04:02:28","guid":{"rendered":"http:\/\/blogs.softwareclue.com\/?p=340"},"modified":"2016-05-15T04:02:28","modified_gmt":"2016-05-15T04:02:28","slug":"java%e5%86%85%e5%ad%98%e6%a8%a1%e5%9e%8b","status":"publish","type":"post","link":"http:\/\/blog.softwareclues.com\/zh\/java%e5%86%85%e5%ad%98%e6%a8%a1%e5%9e%8b","title":{"rendered":"Java\u5185\u5b58\u6a21\u578b"},"content":{"rendered":"<blockquote><p>\u82f1\u6587\uff1aJakob Jenkov<\/p>\n<p>\u8bd1\u6587\uff1a\u5f20\u5764<\/p>\n<p>\u94fe\u63a5\uff1a<a href=\"http:\/\/ifeve.com\/java-memory-model-6\/\" target=\"_blank\">http:\/\/ifeve.com\/java-memory-model-6\/<\/a><\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>Java\u5185\u5b58\u6a21\u578b\u89c4\u8303\u4e86Java\u865a\u62df\u673a\u4e0e\u8ba1\u7b97\u673a\u5185\u5b58\u662f\u5982\u4f55\u534f\u540c\u5de5\u4f5c\u7684\u3002Java\u865a\u62df\u673a\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u8ba1\u7b97\u673a\u7684\u4e00\u4e2a\u6a21\u578b\uff0c\u56e0\u6b64\u8fd9\u4e2a\u6a21\u578b\u81ea\u7136\u4e5f\u5305\u542b\u4e00\u4e2a\u5185\u5b58\u6a21\u578b\u2014\u2014\u53c8\u79f0\u4e3aJava\u5185\u5b58\u6a21\u578b\u3002<span id=\"more-19805\"><\/span><\/p>\n<p>\u5982\u679c\u4f60\u60f3\u8bbe\u8ba1\u8868\u73b0\u826f\u597d\u7684\u5e76\u53d1\u7a0b\u5e8f\uff0c\u7406\u89e3Java\u5185\u5b58\u6a21\u578b\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002Java\u5185\u5b58\u6a21\u578b\u89c4\u5b9a\u4e86\u5982\u4f55\u548c\u4f55\u65f6\u53ef\u4ee5\u770b\u5230\u7531\u5176\u4ed6\u7ebf\u7a0b\u4fee\u6539\u8fc7\u540e\u7684\u5171\u4eab\u53d8\u91cf\u7684\u503c\uff0c\u4ee5\u53ca\u5728\u5fc5\u987b\u65f6\u5982\u4f55\u540c\u6b65\u7684\u8bbf\u95ee\u5171\u4eab\u53d8\u91cf\u3002<\/p>\n<p>\u539f\u59cb\u7684Java\u5185\u5b58\u6a21\u578b\u5b58\u5728\u4e00\u4e9b\u4e0d\u8db3\uff0c\u56e0\u6b64Java\u5185\u5b58\u6a21\u578b\u5728Java1.5\u65f6\u88ab\u91cd\u65b0\u4fee\u8ba2\u3002\u8fd9\u4e2a\u7248\u672c\u7684Java\u5185\u5b58\u6a21\u578b\u5728Java8\u4e2d\u4eba\u5728\u4f7f\u7528\u3002<\/p>\n<h3 id=\"java\u5185\u5b58\u6a21\u578b\u5185\u90e8\u539f\u7406\">Java\u5185\u5b58\u6a21\u578b\u5185\u90e8\u539f\u7406<\/h3>\n<p>Java\u5185\u5b58\u6a21\u578b\u628aJava\u865a\u62df\u673a\u5185\u90e8\u5212\u5206\u4e3a\u7ebf\u7a0b\u6808\u548c\u5806\u3002\u8fd9\u5f20\u56fe\u6f14\u793a\u4e86Java\u5185\u5b58\u6a21\u578b\u7684\u903b\u8f91\u89c6\u56fe\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/tutorials.jenkov.com\/images\/java-concurrency\/java-memory-model-1.png?w=840\" alt=\"Java Memory Model\" data-recalc-dims=\"1\" \/><\/p>\n<p>\u6bcf\u4e00\u4e2a\u8fd0\u884c\u5728Java\u865a\u62df\u673a\u91cc\u7684\u7ebf\u7a0b\u90fd\u62e5\u6709\u81ea\u5df1\u7684\u7ebf\u7a0b\u6808\u3002\u8fd9\u4e2a\u7ebf\u7a0b\u6808\u5305\u542b\u4e86\u8fd9\u4e2a\u7ebf\u7a0b\u8c03\u7528\u7684\u65b9\u6cd5\u5f53\u524d\u6267\u884c\u70b9\u76f8\u5173\u7684\u4fe1\u606f\u3002\u4e00\u4e2a\u7ebf\u7a0b\u4ec5\u80fd\u8bbf\u95ee\u81ea\u5df1\u7684\u7ebf\u7a0b \u6808\u3002\u4e00\u4e2a\u7ebf\u7a0b\u521b\u5efa\u7684\u672c\u5730\u53d8\u91cf\u5bf9\u5176\u5b83\u7ebf\u7a0b\u4e0d\u53ef\u89c1\uff0c\u4ec5\u81ea\u5df1\u53ef\u89c1\u3002\u5373\u4f7f\u4e24\u4e2a\u7ebf\u7a0b\u6267\u884c\u540c\u6837\u7684\u4ee3\u7801\uff0c\u8fd9\u4e24\u4e2a\u7ebf\u7a0b\u4efb\u7136\u5728\u5728\u81ea\u5df1\u7684\u7ebf\u7a0b\u6808\u4e2d\u7684\u4ee3\u7801\u6765\u521b\u5efa\u672c\u5730\u53d8\u91cf\u3002\u56e0\u6b64\uff0c \u6bcf\u4e2a\u7ebf\u7a0b\u62e5\u6709\u6bcf\u4e2a\u672c\u5730\u53d8\u91cf\u7684\u72ec\u6709\u7248\u672c\u3002<\/p>\n<p>\u6240\u6709\u539f\u59cb\u7c7b\u578b\u7684\u672c\u5730\u53d8\u91cf\u90fd\u5b58\u653e\u5728\u7ebf\u7a0b\u6808\u4e0a\uff0c\u56e0\u6b64\u5bf9\u5176\u5b83\u7ebf\u7a0b\u4e0d\u53ef\u89c1\u3002\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u80fd\u5411\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u4f20\u9012\u4e00\u4e2a\u539f\u59cb\u7c7b\u578b\u53d8\u91cf\u7684\u62f7\u8d1d\uff0c\u4f46\u662f\u5b83\u4e0d\u80fd\u5171\u4eab\u8fd9\u4e2a\u539f\u59cb\u7c7b\u578b\u53d8\u91cf\u81ea\u8eab\u3002<\/p>\n<p>\u5806\u4e0a\u5305\u542b\u5728Java\u7a0b\u5e8f\u4e2d\u521b\u5efa\u7684\u6240\u6709\u5bf9\u8c61\uff0c\u65e0\u8bba\u662f\u54ea\u4e00\u4e2a\u5bf9\u8c61\u521b\u5efa\u7684\u3002\u8fd9\u5305\u62ec\u539f\u59cb\u7c7b\u578b\u7684\u5bf9\u8c61\u7248\u672c\u3002\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u88ab\u521b\u5efa\u7136\u540e\u8d4b\u503c\u7ed9\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf\uff0c\u6216\u8005\u7528\u6765\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u4efb\u7136\u662f\u5b58\u653e\u5728\u5806\u4e0a\u3002<\/p>\n<p>\u4e0b\u9762\u8fd9\u5f20\u56fe\u6f14\u793a\u4e86\u8c03\u7528\u6808\u548c\u672c\u5730\u53d8\u91cf\u5b58\u653e\u5728\u7ebf\u7a0b\u6808\u4e0a\uff0c\u5bf9\u8c61\u5b58\u653e\u5728\u5806\u4e0a\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/tutorials.jenkov.com\/images\/java-concurrency\/java-memory-model-2.png?w=840\" alt=\"enter image description here\" data-recalc-dims=\"1\" \/><\/p>\n<p>\u4e00\u4e2a\u672c\u5730\u53d8\u91cf\u53ef\u80fd\u662f\u539f\u59cb\u7c7b\u578b\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5b83\u603b\u662f\u201c\u5446\u5728\u201d\u7ebf\u7a0b\u6808\u4e0a\u3002<\/p>\n<p>\u4e00\u4e2a\u672c\u5730\u53d8\u91cf\u4e5f\u53ef\u80fd\u662f\u6307\u5411\u4e00\u4e2a\u5bf9\u8c61\u7684\u4e00\u4e2a\u5f15\u7528\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5f15\u7528\uff08\u8fd9\u4e2a\u672c\u5730\u53d8\u91cf\uff09\u5b58\u653e\u5728\u7ebf\u7a0b\u6808\u4e0a\uff0c\u4f46\u662f\u5bf9\u8c61\u672c\u8eab\u5b58\u653e\u5728\u5806\u4e0a\u3002<\/p>\n<p>\u4e00\u4e2a\u5bf9\u8c61\u53ef\u80fd\u5305\u542b\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u80fd\u5305\u542b\u672c\u5730\u53d8\u91cf\u3002\u8fd9\u4e9b\u672c\u5730\u53d8\u91cf\u4efb\u7136\u5b58\u653e\u5728\u7ebf\u7a0b\u6808\u4e0a\uff0c\u5373\u4f7f\u8fd9\u4e9b\u65b9\u6cd5\u6240\u5c5e\u7684\u5bf9\u8c61\u5b58\u653e\u5728\u5806\u4e0a\u3002<\/p>\n<p>\u4e00\u4e2a\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u53ef\u80fd\u968f\u7740\u8fd9\u4e2a\u5bf9\u8c61\u81ea\u8eab\u5b58\u653e\u5728\u5806\u4e0a\u3002\u4e0d\u7ba1\u8fd9\u4e2a\u6210\u5458\u53d8\u91cf\u662f\u539f\u59cb\u7c7b\u578b\u8fd8\u662f\u5f15\u7528\u7c7b\u578b\u3002<\/p>\n<p>\u9759\u6001\u6210\u5458\u53d8\u91cf\u8ddf\u968f\u7740\u7c7b\u5b9a\u4e49\u4e00\u8d77\u4e5f\u5b58\u653e\u5728\u5806\u4e0a\u3002<\/p>\n<p>\u5b58\u653e\u5728\u5806\u4e0a\u7684\u5bf9\u8c61\u53ef\u4ee5\u88ab\u6240\u6709\u6301\u6709\u5bf9\u8fd9\u4e2a\u5bf9\u8c61\u5f15\u7528\u7684\u7ebf\u7a0b\u8bbf\u95ee\u3002\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u8bbf\u95ee\u4e00\u4e2a\u5bf9\u8c61\u65f6\uff0c\u5b83\u4e5f\u53ef\u4ee5\u8bbf\u95ee\u8fd9\u4e2a\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u3002\u5982\u679c\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8c03\u7528\u540c\u4e00\u4e2a\u5bf9\u8c61\u4e0a\u7684\u540c\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5b83\u4eec\u5c06\u4f1a\u90fd\u8bbf\u95ee\u8fd9\u4e2a\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\uff0c\u4f46\u662f\u6bcf\u4e00\u4e2a\u7ebf\u7a0b\u90fd\u62e5\u6709\u8fd9\u4e2a\u672c\u5730\u53d8\u91cf\u7684\u79c1\u6709\u62f7\u8d1d\u3002<\/p>\n<p>\u4e0b\u56fe\u6f14\u793a\u4e86\u4e0a\u9762\u63d0\u5230\u7684\u70b9\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/tutorials.jenkov.com\/images\/java-concurrency\/java-memory-model-3.png?w=840\" alt=\"enter image description here\" data-recalc-dims=\"1\" \/><\/p>\n<p>\u4e24\u4e2a\u7ebf\u7a0b\u62e5\u6709\u4e00\u4e9b\u5217\u7684\u672c\u5730\u53d8\u91cf\u3002\u5176\u4e2d\u4e00\u4e2a\u672c\u5730\u53d8\u91cf\uff08Local Variable 2\uff09\u6267\u884c\u5806\u4e0a\u7684\u4e00\u4e2a\u5171\u4eab\u5bf9\u8c61\uff08Object 3\uff09\u3002\u8fd9\u4e24\u4e2a\u7ebf\u7a0b\u5206\u522b\u62e5\u6709\u540c\u4e00\u4e2a\u5bf9\u8c61\u7684\u4e0d\u540c\u5f15\u7528\u3002\u8fd9\u4e9b\u5f15\u7528\u90fd\u662f\u672c\u5730\u53d8\u91cf\uff0c\u56e0\u6b64\u5b58\u653e\u5728\u5404\u81ea\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u6808\u4e0a\u3002\u8fd9\u4e24\u4e2a\u4e0d\u540c\u7684\u5f15\u7528\u6307\u5411\u5806\u4e0a\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n<p>\u6ce8\u610f\uff0c\u8fd9\u4e2a\u5171\u4eab\u5bf9\u8c61\uff08Object 3\uff09\u6301\u6709Object2\u548cObject4\u4e00\u4e2a\u5f15\u7528\u4f5c\u4e3a\u5176\u6210\u5458\u53d8\u91cf\uff08\u5982\u56fe\u4e2dObject3\u6307\u5411Object2\u548cObject4\u7684\u7bad\u5934\uff09\u3002\u901a\u8fc7\u5728Object3\u4e2d\u8fd9\u4e9b\u6210\u5458\u53d8\u91cf\u5f15\u7528\uff0c\u8fd9\u4e24\u4e2a\u7ebf\u7a0b\u5c31\u53ef\u4ee5\u8bbf\u95eeObject2\u548cObject4\u3002<\/p>\n<p>\u8fd9\u5f20\u56fe\u4e5f\u5c55\u793a\u4e86\u6307\u5411\u5806\u4e0a\u4e24\u4e2a\u4e0d\u540c\u5bf9\u8c61\u7684\u4e00\u4e2a\u672c\u5730\u53d8\u91cf\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6307\u5411\u4e24\u4e2a\u4e0d\u540c\u5bf9\u8c61\u7684\u5f15\u7528\u4e0d\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002\u7406\u8bba\u4e0a\uff0c\u4e24\u4e2a\u7ebf\u7a0b\u90fd\u53ef\u4ee5\u8bbf\u95eeObject1\u548cObject5\uff0c\u5982\u679c\u4e24\u4e2a\u7ebf\u7a0b\u90fd\u62e5\u6709\u4e24\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u4f46\u662f\u5728\u4e0a\u56fe\u4e2d\uff0c\u6bcf\u4e00\u4e2a\u7ebf\u7a0b\u4ec5\u6709\u4e00\u4e2a\u5f15\u7528\u6307\u5411\u4e24\u4e2a\u5bf9\u8c61\u5176\u4e2d\u4e4b\u4e00\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u4ec0\u4e48\u7c7b\u578b\u7684Java\u4ee3\u7801\u4f1a\u5bfc\u81f4\u4e0a\u9762\u7684\u5185\u5b58\u56fe\u5462\uff1f\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre><code>public class MyRunnable implements Runnable() {\r\n\r\n    public void run() {\r\n        methodOne();\r\n    }\r\n\r\n    public void methodOne() {\r\n        int localVariable1 = 45;\r\n\r\n        MySharedObject localVariable2 =\r\n            MySharedObject.sharedInstance;\r\n\r\n        \/\/... do more with local variables.\r\n\r\n        methodTwo();\r\n    }\r\n\r\n    public void methodTwo() {\r\n        Integer localVariable1 = new Integer(99);\r\n\r\n        \/\/... do more with local variable.\r\n    }\r\n}\r\n\r\n\r\npublic class MySharedObject {\r\n\r\n    \/\/static variable pointing to instance of MySharedObject\r\n\r\n    public static final MySharedObject sharedInstance =\r\n        new MySharedObject();\r\n\r\n\r\n    \/\/member variables pointing to two objects on the heap\r\n\r\n    public Integer object2 = new Integer(22);\r\n    public Integer object4 = new Integer(44);\r\n\r\n    public long member1 = 12345;\r\n    public long member1 = 67890;\r\n}<\/code><\/pre>\n<p>\u5982\u679c\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u6267\u884c<code>run()<\/code>\u65b9\u6cd5\uff0c\u5c31\u4f1a\u51fa\u73b0\u4e0a\u56fe\u6240\u793a\u7684\u60c5\u666f\u3002<code>run()<\/code>\u65b9\u6cd5\u8c03\u7528<code>methodOne()<\/code>\u65b9\u6cd5\uff0c<code>methodOne()<\/code>\u8c03\u7528<code>methodTwo()<\/code>\u65b9\u6cd5\u3002<\/p>\n<p><code>methodOne()<\/code>\u58f0\u660e\u4e86\u4e00\u4e2a\u539f\u59cb\u7c7b\u578b\u7684\u672c\u5730\u53d8\u91cf\u548c\u4e00\u4e2a\u5f15\u7528\u7c7b\u578b\u7684\u672c\u5730\u53d8\u91cf\u3002<\/p>\n<p>\u6bcf\u4e2a\u7ebf\u7a0b\u6267\u884c<code>methodOne()<\/code>\u90fd\u4f1a\u5728\u5b83\u4eec\u5bf9\u5e94\u7684\u7ebf\u7a0b\u6808\u4e0a\u521b\u5efa<code>localVariable1<\/code>\u548c<code>localVariable2<\/code>\u7684\u79c1\u6709\u62f7\u8d1d\u3002<code>localVariable1<\/code>\u53d8\u91cf\u5f7c\u6b64\u5b8c\u5168\u72ec\u7acb\uff0c\u4ec5\u201c\u751f\u6d3b\u201d\u5728\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u6808\u4e0a\u3002\u4e00\u4e2a\u7ebf\u7a0b\u770b\u4e0d\u5230\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u5bf9\u5b83\u7684<code>localVariable1<\/code>\u79c1\u6709\u62f7\u8d1d\u505a\u51fa\u7684\u4fee\u6539\u3002<\/p>\n<p>\u6bcf\u4e2a\u7ebf\u7a0b\u6267\u884c<code>methodOne()<\/code>\u65f6\u4e5f\u5c06\u4f1a\u521b\u5efa\u5b83\u4eec\u5404\u81ea\u7684<code>localVariable2<\/code>\u62f7\u8d1d\u3002\u7136\u800c\uff0c\u4e24\u4e2a<code>localVariable2<\/code>\u7684\u4e0d\u540c\u62f7\u8d1d\u90fd\u6307\u5411\u5806\u4e0a\u7684\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002\u4ee3\u7801\u4e2d\u901a\u8fc7\u4e00\u4e2a\u9759\u6001\u53d8\u91cf\u8bbe\u7f6e<code>localVariable2<\/code>\u6307\u5411\u4e00\u4e2a\u5bf9\u8c61\u5f15\u7528\u3002\u4ec5\u5b58\u5728\u4e00\u4e2a\u9759\u6001\u53d8\u91cf\u7684\u4e00\u4efd\u62f7\u8d1d\uff0c\u8fd9\u4efd\u62f7\u8d1d\u5b58\u653e\u5728\u5806\u4e0a\u3002\u56e0\u6b64\uff0c<code>localVariable2<\/code>\u7684\u4e24\u4efd\u62f7\u8d1d\u90fd\u6307\u5411\u7531<code>MySharedObject<\/code>\u6307\u5411\u7684\u9759\u6001\u53d8\u91cf\u7684\u540c\u4e00\u4e2a\u5b9e\u4f8b\u3002<code>MySharedObject<\/code>\u5b9e\u4f8b\u4e5f\u5b58\u653e\u5728\u5806\u4e0a\u3002\u5b83\u5bf9\u5e94\u4e8e\u4e0a\u56fe\u4e2d\u7684Object3\u3002<\/p>\n<p>\u6ce8\u610f\uff0c<code>MySharedObject<\/code>\u7c7b\u4e5f\u5305\u542b\u4e24\u4e2a\u6210\u5458\u53d8\u91cf\u3002\u8fd9\u4e9b\u6210\u5458\u53d8\u91cf\u968f\u7740\u8fd9\u4e2a\u5bf9\u8c61\u5b58\u653e\u5728\u5806\u4e0a\u3002\u8fd9\u4e24\u4e2a\u6210\u5458\u53d8\u91cf\u6307\u5411\u53e6\u5916\u4e24\u4e2a<code>Integer<\/code>\u5bf9\u8c61\u3002\u8fd9\u4e9b<code>Integer<\/code>\u5bf9\u8c61\u5bf9\u5e94\u4e8e\u4e0a\u56fe\u4e2d\u7684Object2\u548cObject4.<\/p>\n<p>\u6ce8\u610f\uff0c<code>methodTwo()<\/code>\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a<code>localVariable<\/code>\u7684\u672c\u5730\u53d8\u91cf\u3002\u8fd9\u4e2a\u6210\u5458\u53d8\u91cf\u662f\u4e00\u4e2a\u6307\u5411\u4e00\u4e2a<code>Integer<\/code>\u5bf9\u8c61\u7684\u5bf9\u8c61\u5f15\u7528\u3002\u8fd9\u4e2a\u65b9\u6cd5\u8bbe\u7f6e<code>localVariable1<\/code>\u5f15\u7528\u6307\u5411\u4e00\u4e2a\u65b0\u7684<code>Integer<\/code>\u5b9e\u4f8b\u3002\u5728\u6267\u884c<code>methodTwo<\/code>\u65b9\u6cd5\u65f6\uff0c<code>localVariable1<\/code>\u5f15\u7528\u5c06\u4f1a\u5728\u6bcf\u4e2a\u7ebf\u7a0b\u4e2d\u5b58\u653e\u4e00\u4efd\u62f7\u8d1d\u3002\u8fd9\u4e24\u4e2a<code>Integer<\/code>\u5bf9\u8c61\u5b9e\u4f8b\u5316\u5c06\u4f1a\u88ab\u5b58\u50a8\u5806\u4e0a\uff0c\u4f46\u662f\u6bcf\u6b21\u6267\u884c\u8fd9\u4e2a\u65b9\u6cd5\u65f6\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684<code>Integer<\/code>\u5bf9\u8c61\uff0c\u4e24\u4e2a\u7ebf\u7a0b\u6267\u884c\u8fd9\u4e2a\u65b9\u6cd5\u5c06\u4f1a\u521b\u5efa\u4e24\u4e2a\u4e0d\u540c\u7684<code>Integer<\/code>\u5b9e\u4f8b\u3002<code>methodTwo<\/code>\u65b9\u6cd5\u521b\u5efa\u7684<code>Integer<\/code>\u5bf9\u8c61\u5bf9\u5e94\u4e8e\u4e0a\u56fe\u4e2d\u7684Object1\u548cObject5\u3002<\/p>\n<p>\u8fd8\u6709\u4e00\u70b9\uff0c<code>MySharedObject<\/code>\u7c7b\u4e2d\u7684\u4e24\u4e2a<code>long<\/code>\u7c7b\u578b\u7684\u6210\u5458\u53d8\u91cf\u662f\u539f\u59cb\u7c7b\u578b\u7684\u3002\u56e0\u4e3a\uff0c\u8fd9\u4e9b\u53d8\u91cf\u662f\u6210\u5458\u53d8\u91cf\uff0c\u6240\u4ee5\u5b83\u4eec\u4efb\u7136\u968f\u7740\u8be5\u5bf9\u8c61\u5b58\u653e\u5728\u5806\u4e0a\uff0c\u4ec5\u6709\u672c\u5730\u53d8\u91cf\u5b58\u653e\u5728\u7ebf\u7a0b\u6808\u4e0a\u3002<\/p>\n<h3 id=\"\u786c\u4ef6\u5185\u5b58\u67b6\u6784\">\u786c\u4ef6\u5185\u5b58\u67b6\u6784<\/h3>\n<p>\u73b0\u4ee3\u786c\u4ef6\u5185\u5b58\u6a21\u578b\u4e0eJava\u5185\u5b58\u6a21\u578b\u6709\u4e00\u4e9b\u4e0d\u540c\u3002\u7406\u89e3\u5185\u5b58\u6a21\u578b\u67b6\u6784\u4ee5\u53caJava\u5185\u5b58\u6a21\u578b\u5982\u4f55\u4e0e\u5b83\u534f\u540c\u5de5\u4f5c\u4e5f\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u8fd9\u90e8\u5206\u63cf\u8ff0\u4e86\u901a\u7528\u7684\u786c\u4ef6\u5185\u5b58\u67b6\u6784\uff0c\u4e0b\u9762\u7684\u90e8\u5206\u5c06\u4f1a\u63cf\u8ff0Java\u5185\u5b58\u662f\u5982\u4f55\u4e0e\u5b83\u201c\u8054\u624b\u201d\u5de5\u4f5c\u7684\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u73b0\u4ee3\u8ba1\u7b97\u673a\u786c\u4ef6\u67b6\u6784\u7684\u7b80\u5355\u56fe\u793a\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/tutorials.jenkov.com\/images\/java-concurrency\/java-memory-model-4.png?w=840\" alt=\"enter image description here\" data-recalc-dims=\"1\" \/><\/p>\n<p>\u4e00\u4e2a\u73b0\u4ee3\u8ba1\u7b97\u673a\u901a\u5e38\u7531\u4e24\u4e2a\u6216\u8005\u591a\u4e2aCPU\u3002\u5176\u4e2d\u4e00\u4e9bCPU\u8fd8\u6709\u591a\u6838\u3002\u4ece\u8fd9\u4e00\u70b9\u53ef\u4ee5\u770b\u51fa\uff0c\u5728\u4e00\u4e2a\u6709\u4e24\u4e2a\u6216\u8005\u591a\u4e2aCPU\u7684\u73b0\u4ee3\u8ba1\u7b97\u673a\u4e0a\u540c\u65f6\u8fd0\u884c\u591a\u4e2a\u7ebf\u7a0b \u662f\u53ef\u80fd\u7684\u3002\u6bcf\u4e2aCPU\u5728\u67d0\u4e00\u65f6\u523b\u8fd0\u884c\u4e00\u4e2a\u7ebf\u7a0b\u662f\u6ca1\u6709\u95ee\u9898\u7684\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5982\u679c\u4f60\u7684Java\u7a0b\u5e8f\u662f\u591a\u7ebf\u7a0b\u7684\uff0c\u5728\u4f60\u7684Java\u7a0b\u5e8f\u4e2d\u6bcf\u4e2aCPU\u4e0a\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u80fd\u540c \u65f6\uff08\u5e76\u53d1\uff09\u6267\u884c\u3002<\/p>\n<p>\u6bcf\u4e2aCPU\u90fd\u5305\u542b\u4e00\u7cfb\u5217\u7684\u5bc4\u5b58\u5668\uff0c\u5b83\u4eec\u662fCPU\u5185\u5185\u5b58\u7684\u57fa\u7840\u3002CPU\u5728\u5bc4\u5b58\u5668\u4e0a\u6267\u884c\u64cd\u4f5c\u7684\u901f\u5ea6\u8fdc\u5927\u4e8e\u5728\u4e3b\u5b58\u4e0a\u6267\u884c\u7684\u901f\u5ea6\u3002\u8fd9\u662f\u56e0\u4e3aCPU\u8bbf\u95ee\u5bc4\u5b58\u5668\u7684\u901f\u5ea6\u8fdc\u5927\u4e8e\u4e3b\u5b58\u3002<\/p>\n<p>\u6bcf\u4e2aCPU\u53ef\u80fd\u8fd8\u6709\u4e00\u4e2aCPU\u7f13\u5b58\u5c42\u3002\u5b9e\u9645\u4e0a\uff0c\u7edd\u5927\u591a\u6570\u7684\u73b0\u4ee3CPU\u90fd\u6709\u4e00\u5b9a\u5927\u5c0f\u7684\u7f13\u5b58\u5c42\u3002CPU\u8bbf\u95ee\u7f13\u5b58\u5c42\u7684\u901f\u5ea6\u5feb\u4e8e\u8bbf\u95ee\u4e3b\u5b58\u7684\u901f\u5ea6\uff0c\u4f46\u901a\u5e38\u6bd4\u8bbf \u95ee\u5185\u90e8\u5bc4\u5b58\u5668\u7684\u901f\u5ea6\u8fd8\u8981\u6162\u4e00\u70b9\u3002\u4e00\u4e9bCPU\u8fd8\u6709\u591a\u5c42\u7f13\u5b58\uff0c\u4f46\u8fd9\u4e9b\u5bf9\u7406\u89e3Java\u5185\u5b58\u6a21\u578b\u5982\u4f55\u548c\u5185\u5b58\u4ea4\u4e92\u4e0d\u662f\u90a3\u4e48\u91cd\u8981\u3002\u53ea\u8981\u77e5\u9053CPU\u4e2d\u53ef\u4ee5\u6709\u4e00\u4e2a\u7f13\u5b58\u5c42\u5c31 \u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u4e00\u4e2a\u8ba1\u7b97\u673a\u8fd8\u5305\u542b\u4e00\u4e2a\u4e3b\u5b58\u3002\u6240\u6709\u7684CPU\u90fd\u53ef\u4ee5\u8bbf\u95ee\u4e3b\u5b58\u3002\u4e3b\u5b58\u901a\u5e38\u6bd4CPU\u4e2d\u7684\u7f13\u5b58\u5927\u5f97\u591a\u3002<\/p>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5f53\u4e00\u4e2aCPU\u9700\u8981\u8bfb\u53d6\u4e3b\u5b58\u65f6\uff0c\u5b83\u4f1a\u5c06\u4e3b\u5b58\u7684\u90e8\u5206\u8bfb\u5230CPU\u7f13\u5b58\u4e2d\u3002\u5b83\u751a\u81f3\u53ef\u80fd\u5c06\u7f13\u5b58\u4e2d\u7684\u90e8\u5206\u5185\u5bb9\u8bfb\u5230\u5b83\u7684\u5185\u90e8\u5bc4\u5b58\u5668\u4e2d\uff0c\u7136\u540e\u5728\u5bc4\u5b58\u5668\u4e2d\u6267\u884c\u64cd\u4f5c\u3002\u5f53CPU\u9700\u8981\u5c06\u7ed3\u679c\u5199\u56de\u5230\u4e3b\u5b58\u4e2d\u53bb\u65f6\uff0c\u5b83\u4f1a\u5c06\u5185\u90e8\u5bc4\u5b58\u5668\u7684\u503c\u5237\u65b0\u5230\u7f13\u5b58\u4e2d\uff0c\u7136\u540e\u5728\u67d0\u4e2a\u65f6\u95f4\u70b9\u5c06\u503c\u5237\u65b0\u56de\u4e3b\u5b58\u3002<\/p>\n<p>\u5f53CPU\u9700\u8981\u5728\u7f13\u5b58\u5c42\u5b58\u653e\u4e00\u4e9b\u4e1c\u897f\u7684\u65f6\u5019\uff0c\u5b58\u653e\u5728\u7f13\u5b58\u4e2d\u7684\u5185\u5bb9\u901a\u5e38\u4f1a\u88ab\u5237\u65b0\u56de\u4e3b\u5b58\u3002CPU\u7f13\u5b58\u53ef\u4ee5\u5728\u67d0\u4e00\u65f6\u523b\u5c06\u6570\u636e\u5c40\u90e8\u5199\u5230\u5b83\u7684\u5185\u5b58\u4e2d\uff0c\u548c\u5728\u67d0\u4e00\u65f6 \u523b\u5c40\u90e8\u5237\u65b0\u5b83\u7684\u5185\u5b58\u3002\u5b83\u4e0d\u4f1a\u518d\u67d0\u4e00\u65f6\u523b\u8bfb\/\u5199\u6574\u4e2a\u7f13\u5b58\u3002\u901a\u5e38\uff0c\u5728\u4e00\u4e2a\u88ab\u79f0\u4f5c\u201ccache lines\u201d\u7684\u66f4\u5c0f\u7684\u5185\u5b58\u5757\u4e2d\u7f13\u5b58\u88ab\u66f4\u65b0\u3002\u4e00\u4e2a\u6216\u8005\u591a\u4e2a\u7f13\u5b58\u884c\u53ef\u80fd\u88ab\u8bfb\u5230\u7f13\u5b58\uff0c\u4e00\u4e2a\u6216\u8005\u591a\u4e2a\u7f13\u5b58\u884c\u53ef\u80fd\u518d\u88ab\u5237\u65b0\u56de\u4e3b\u5b58\u3002<\/p>\n<h3 id=\"java\u5185\u5b58\u6a21\u578b\u548c\u786c\u4ef6\u5185\u5b58\u67b6\u6784\u4e4b\u95f4\u7684\u6865\u63a5\">Java\u5185\u5b58\u6a21\u578b\u548c\u786c\u4ef6\u5185\u5b58\u67b6\u6784\u4e4b\u95f4\u7684\u6865\u63a5<\/h3>\n<p>\u4e0a\u9762\u5df2\u7ecf\u63d0\u5230\uff0cJava\u5185\u5b58\u6a21\u578b\u4e0e\u786c\u4ef6\u5185\u5b58\u67b6\u6784\u4e4b\u95f4\u5b58\u5728\u5dee\u5f02\u3002\u786c\u4ef6\u5185\u5b58\u67b6\u6784\u6ca1\u6709\u533a\u5206\u7ebf\u7a0b\u6808\u548c\u5806\u3002\u5bf9\u4e8e\u786c\u4ef6\uff0c\u6240\u6709\u7684\u7ebf\u7a0b\u6808\u548c\u5806\u90fd\u5206\u5e03\u5728\u4e3b\u5185\u4e2d\u3002\u90e8\u5206\u7ebf\u7a0b\u6808\u548c\u5806\u53ef\u80fd\u6709\u65f6\u5019\u4f1a\u51fa\u73b0\u5728CPU\u7f13\u5b58\u4e2d\u548cCPU\u5185\u90e8\u7684\u5bc4\u5b58\u5668\u4e2d\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/tutorials.jenkov.com\/images\/java-concurrency\/java-memory-model-5.png?w=840\" alt=\"enter image description here\" data-recalc-dims=\"1\" \/><\/p>\n<div id=\"wmd-preview-section-29447\" class=\"wmd-preview-section preview-content\">\n<p>\u5f53\u5bf9\u8c61\u548c\u53d8\u91cf\u88ab\u5b58\u653e\u5728\u8ba1\u7b97\u673a\u4e2d\u5404\u79cd\u4e0d\u540c\u7684\u5185\u5b58\u533a\u57df\u4e2d\u65f6\uff0c\u5c31\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e00\u4e9b\u5177\u4f53\u7684\u95ee\u9898\u3002\u4e3b\u8981\u5305\u62ec\u5982\u4e0b\u4e24\u4e2a\u65b9\u9762\uff1a<\/p>\n<p>-\u7ebf\u7a0b\u5bf9\u5171\u4eab\u53d8\u91cf\u4fee\u6539\u7684\u53ef\u89c1\u6027<br \/>\n-\u5f53\u8bfb\uff0c\u5199\u548c\u68c0\u67e5\u5171\u4eab\u53d8\u91cf\u65f6\u51fa\u73b0race conditions<\/p>\n<p>\u4e0b\u9762\u6211\u4eec\u4e13\u95e8\u6765\u89e3\u91ca\u4ee5\u4e0b\u8fd9\u4e24\u4e2a\u95ee\u9898\u3002<\/p>\n<\/div>\n<div id=\"wmd-preview-section-29448\" class=\"wmd-preview-section preview-content\">\n<h4 id=\"\u5171\u4eab\u5bf9\u8c61\u53ef\u89c1\u6027\">\u5171\u4eab\u5bf9\u8c61\u53ef\u89c1\u6027<\/h4>\n<p>\u5982\u679c\u4e24\u4e2a\u6216\u8005\u66f4\u591a\u7684\u7ebf\u7a0b\u5728\u6ca1\u6709\u6b63\u786e\u7684\u4f7f\u7528<code>volatile<\/code>\u58f0\u660e\u6216\u8005\u540c\u6b65\u7684\u60c5\u51b5\u4e0b\u5171\u4eab\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4e00\u4e2a\u7ebf\u7a0b\u66f4\u65b0\u8fd9\u4e2a\u5171\u4eab\u5bf9\u8c61\u53ef\u80fd\u5bf9\u5176\u5b83\u7ebf\u7a0b\u6765\u8bf4\u662f\u4e0d\u63a5\u89c1\u7684\u3002<\/p>\n<p>\u60f3\u8c61\u4e00\u4e0b\uff0c\u5171\u4eab\u5bf9\u8c61\u88ab\u521d\u59cb\u5316\u5728\u4e3b\u5b58\u4e2d\u3002\u8dd1\u5728CPU\u4e0a\u7684\u4e00\u4e2a\u7ebf\u7a0b\u5c06\u8fd9\u4e2a\u5171\u4eab\u5bf9\u8c61\u8bfb\u5230CPU\u7f13\u5b58\u4e2d\u3002\u7136\u540e\u4fee\u6539\u4e86\u8fd9\u4e2a\u5bf9\u8c61\u3002\u53ea\u8981CPU\u7f13\u5b58\u6ca1\u6709\u88ab\u5237\u65b0\u4f1a\u4e3b \u5b58\uff0c\u5bf9\u8c61\u4fee\u6539\u540e\u7684\u7248\u672c\u5bf9\u8dd1\u5728\u5176\u5b83CPU\u4e0a\u7684\u7ebf\u7a0b\u90fd\u662f\u4e0d\u53ef\u89c1\u7684\u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u80fd\u5bfc\u81f4\u6bcf\u4e2a\u7ebf\u7a0b\u62e5\u6709\u8fd9\u4e2a\u5171\u4eab\u5bf9\u8c61\u7684\u79c1\u6709\u62f7\u8d1d\uff0c\u6bcf\u4e2a\u62f7\u8d1d\u505c\u7559\u5728\u4e0d\u540c\u7684CPU\u7f13\u5b58\u4e2d\u3002<\/p>\n<p>\u4e0b\u56fe\u793a\u610f\u4e86\u8fd9\u79cd\u60c5\u5f62\u3002\u8dd1\u5728\u5de6\u8fb9CPU\u7684\u7ebf\u7a0b\u62f7\u8d1d\u8fd9\u4e2a\u5171\u4eab\u5bf9\u8c61\u5230\u5b83\u7684CPU\u7f13\u5b58\u4e2d\uff0c\u7136\u540e\u5c06count\u53d8\u91cf\u7684\u503c\u4fee\u6539\u4e3a2\u3002\u8fd9\u4e2a\u4fee\u6539\u5bf9\u8dd1\u5728\u53f3\u8fb9CPU\u4e0a\u7684\u5176\u5b83\u7ebf\u7a0b\u662f\u4e0d\u53ef\u89c1\u7684\uff0c\u56e0\u4e3a\u4fee\u6539\u540e\u7684count\u7684\u503c\u8fd8\u6ca1\u6709\u88ab\u5237\u65b0\u56de\u4e3b\u5b58\u4e2d\u53bb\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/tutorials.jenkov.com\/images\/java-concurrency\/java-memory-model-6.png?w=840\" alt=\"enter image description here\" data-recalc-dims=\"1\" \/><\/p>\n<p>\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u4f60\u53ef\u4ee5\u4f7f\u7528Java\u4e2d\u7684<code>volatile<\/code>\u5173\u952e\u5b57\u3002<code>volatile<\/code>\u5173\u952e\u5b57\u53ef\u4ee5\u4fdd\u8bc1\u76f4\u63a5\u4ece\u4e3b\u5b58\u4e2d\u8bfb\u53d6\u4e00\u4e2a\u53d8\u91cf\uff0c\u5982\u679c\u8fd9\u4e2a\u53d8\u91cf\u88ab\u4fee\u6539\u540e\uff0c\u603b\u662f\u4f1a\u88ab\u5199\u56de\u5230\u4e3b\u5b58\u4e2d\u53bb\u3002<\/p>\n<h4 id=\"race-conditions\">Race Conditions<\/h4>\n<p>\u5982\u679c\u4e24\u4e2a\u6216\u8005\u66f4\u591a\u7684\u7ebf\u7a0b\u5171\u4eab\u4e00\u4e2a\u5bf9\u8c61\uff0c\u591a\u4e2a\u7ebf\u7a0b\u5728\u8fd9\u4e2a\u5171\u4eab\u5bf9\u8c61\u4e0a\u66f4\u65b0\u53d8\u91cf\uff0c\u5c31\u6709\u53ef\u80fd\u53d1\u751f<a href=\"http:\/\/tutorials.jenkov.com\/java-concurrency\/race-conditions-and-critical-sections.html\">race conditions<\/a>\u3002<\/p>\n<p>\u60f3\u8c61\u4e00\u4e0b\uff0c\u5982\u679c\u7ebf\u7a0bA\u8bfb\u4e00\u4e2a\u5171\u4eab\u5bf9\u8c61\u7684\u53d8\u91cfcount\u5230\u5b83\u7684CPU\u7f13\u5b58\u4e2d\u3002\u518d\u60f3\u8c61\u4e00\u4e0b\uff0c\u7ebf\u7a0bB\u4e5f\u505a\u4e86\u540c\u6837\u7684\u4e8b\u60c5\uff0c\u4f46\u662f\u5f80\u4e00\u4e2a\u4e0d\u540c\u7684CPU\u7f13\u5b58\u4e2d\u3002\u73b0\u5728\u7ebf\u7a0bA\u5c06<code>count<\/code>\u52a01\uff0c\u7ebf\u7a0bB\u4e5f\u505a\u4e86\u540c\u6837\u7684\u4e8b\u60c5\u3002\u73b0\u5728<code>count<\/code>\u5df2\u7ecf\u88ab\u589e\u5728\u4e86\u4e24\u4e2a\uff0c\u6bcf\u4e2aCPU\u7f13\u5b58\u4e2d\u4e00\u6b21\u3002<\/p>\n<p>\u5982\u679c\u8fd9\u4e9b\u589e\u52a0\u64cd\u4f5c\u88ab\u987a\u5e8f\u7684\u6267\u884c\uff0c\u53d8\u91cf<code>count<\/code>\u5e94\u8be5\u88ab\u589e\u52a0\u4e24\u6b21\uff0c\u7136\u540e\u539f\u503c+2\u88ab\u5199\u56de\u5230\u4e3b\u5b58\u4e2d\u53bb\u3002<\/p>\n<p>\u7136\u800c\uff0c\u4e24\u6b21\u589e\u52a0\u90fd\u662f\u5728\u6ca1\u6709\u9002\u5f53\u7684\u540c\u6b65\u4e0b\u5e76\u53d1\u6267\u884c\u7684\u3002\u65e0\u8bba\u662f\u7ebf\u7a0bA\u8fd8\u662f\u7ebf\u7a0bB\u5c06<code>count<\/code>\u4fee\u6539\u540e\u7684\u7248\u672c\u5199\u56de\u5230\u4e3b\u5b58\u4e2d\u53d6\uff0c\u4fee\u6539\u540e\u7684\u503c\u4ec5\u4f1a\u88ab\u539f\u503c\u59271\uff0c\u5c3d\u7ba1\u589e\u52a0\u4e86\u4e24\u6b21\u3002<\/p>\n<p>\u4e0b\u56fe\u6f14\u793a\u4e86\u4e0a\u9762\u63cf\u8ff0\u7684\u60c5\u51b5\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/i0.wp.com\/tutorials.jenkov.com\/images\/java-concurrency\/java-memory-model-7.png?w=840\" alt=\"enter image description here\" data-recalc-dims=\"1\" \/><\/p>\n<p>\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u53ef\u4ee5\u4f7f\u7528<a href=\"http:\/\/tutorials.jenkov.com\/java-concurrency\/synchronized.html\">Java\u540c\u6b65\u5757<\/a>\u3002\u4e00\u4e2a\u540c\u6b65\u5757\u53ef\u4ee5\u4fdd\u8bc1\u5728\u540c\u4e00\u65f6\u523b\u4ec5\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u8fdb\u5165\u4ee3\u7801\u7684\u4e34\u754c\u533a\u3002\u540c\u6b65\u5757\u8fd8\u53ef\u4ee5\u4fdd\u8bc1\u4ee3\u7801\u5757\u4e2d\u6240\u6709\u88ab\u8bbf\u95ee\u7684\u53d8\u91cf\u5c06\u4f1a\u4ece\u4e3b\u5b58\u4e2d\u8bfb\u5165\uff0c\u5f53\u7ebf\u7a0b\u9000\u51fa\u540c\u6b65\u4ee3\u7801\u5757\u65f6\uff0c\u6240\u6709\u88ab\u66f4\u65b0\u7684\u53d8\u91cf\u90fd\u4f1a\u88ab\u5237\u65b0\u56de\u4e3b\u5b58\u4e2d\u53bb\uff0c\u4e0d\u7ba1\u8fd9\u4e2a\u53d8\u91cf\u662f\u5426\u88ab\u58f0\u660e\u4e3avolatile\u3002<\/p>\n<\/div>\n<div>\n<p><strong>\u539f\u521b\u6587\u7ae0\uff0c\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<\/strong> \u8f6c\u8f7d\u81ea<a href=\"http:\/\/ifeve.com\/\">\u5e76\u53d1\u7f16\u7a0b\u7f51 \u2013 ifeve.com<\/a><strong>\u672c\u6587\u94fe\u63a5\u5730\u5740:<\/strong> <a href=\"http:\/\/ifeve.com\/java-memory-model-6\/\">Java\u5185\u5b58\u6a21\u578b<\/a><\/p>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u82f1\u6587\uff1aJakob Jenkov \u8bd1\u6587\uff1a\u5f20\u5764 \u94fe\u63a5\uff1ahttp:\/\/ifeve.com\/java-memory-m &hellip; <a href=\"http:\/\/blog.softwareclues.com\/zh\/java%e5%86%85%e5%ad%98%e6%a8%a1%e5%9e%8b\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cJava\u5185\u5b58\u6a21\u578b\u201d<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[3,50],"tags":[78,8],"translation":{"provider":"WPGlobus","version":"2.12.2","language":"zh","enabled_languages":["en","zh"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"zh":{"title":true,"content":true,"excerpt":false}}},"jetpack_publicize_connections":[],"yoast_head":"<!-- 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