{"id":51,"date":"2022-02-10T14:22:12","date_gmt":"2022-02-10T06:22:12","guid":{"rendered":"https:\/\/blog.zjia.me\/?p=51"},"modified":"2026-06-19T20:58:08","modified_gmt":"2026-06-19T12:58:08","slug":"%e5%a4%9a%e7%ba%bf%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/blog.ttwow.top\/?p=51","title":{"rendered":"\u591a\u7ebf\u7a0b\u95ee\u7b54"},"content":{"rendered":"

35. \u5e76\u884c\u548c\u5e76\u53d1\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h2>\n

\u5e76\u884c\u662f\u6307\u4e24\u4e2a\u6216\u8005\u591a\u4e2a\u4e8b\u4ef6\u5728\u540c\u4e00\u65f6\u523b\u53d1\u751f\uff1b\u800c\u5e76\u53d1\u662f\u6307\u4e24\u4e2a\u6216\u591a\u4e2a\u4e8b\u4ef6\u5728\u540c\u4e00\u65f6\u95f4\u95f4\u9694\u53d1\u751f\u3002\u5e76\u884c\u662f\u5728\u4e0d\u540c\u5b9e\u4f53\u4e0a\u7684\u591a\u4e2a\u4e8b\u4ef6\uff0c\u5e76\u53d1\u662f\u5728\u540c\u4e00\u5b9e\u4f53\u4e0a\u7684\u591a\u4e2a\u4e8b\u4ef6\u3002\u5728\u4e00\u53f0\u5904\u7406\u5668\u4e0a\u201c\u540c\u65f6\u201d\u5904\u7406\u591a\u4e2a\u4efb\u52a1\uff0c\u5728\u591a\u53f0\u5904\u7406\u5668\u4e0a\u540c\u65f6\u5904\u7406\u591a\u4e2a\u4efb\u52a1\u3002\u5982hadoop\u5206\u5e03\u5f0f\u96c6\u7fa4\u3002\u6240\u4ee5\u5e76\u53d1\u7f16\u7a0b\u7684\u76ee\u6807\u662f\u5145\u5206\u7684\u5229\u7528\u5904\u7406\u5668\u7684\u6bcf\u4e00\u4e2a\u6838\uff0c\u4ee5\u8fbe\u5230\u6700\u9ad8\u7684\u5904\u7406\u6027\u80fd\u3002<\/p>\n

36. \u7ebf\u7a0b\u548c\u8fdb\u7a0b\u7684\u533a\u522b\uff1f<\/h2>\n

\u7b80\u800c\u8a00\u4e4b\uff0c\u8fdb\u7a0b\u662f\u7a0b\u5e8f\u8fd0\u884c\u548c\u8d44\u6e90\u5206\u914d\u7684\u57fa\u672c\u5355\u4f4d\uff0c\u4e00\u4e2a\u7a0b\u5e8f\u81f3\u5c11\u6709\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u81f3\u5c11\u6709\u4e00\u4e2a\u7ebf\u7a0b\u3002\u8fdb\u7a0b\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u62e5\u6709\u72ec\u7acb\u7684\u5185\u5b58\u5355\u5143\uff0c\u800c\u591a\u4e2a\u7ebf\u7a0b\u5171\u4eab\u5185\u5b58\u8d44\u6e90\uff0c\u51cf\u5c11\u5207\u6362\u6b21\u6570\uff0c\u4ece\u800c\u6548\u7387\u66f4\u9ad8\u3002\u7ebf\u7a0b\u662f\u8fdb\u7a0b\u7684\u4e00\u4e2a\u5b9e\u4f53\uff0c\u662fcpu\u8c03\u5ea6\u548c\u5206\u6d3e\u7684\u57fa\u672c\u5355\u4f4d\uff0c\u662f\u6bd4\u7a0b\u5e8f\u66f4\u5c0f\u7684\u80fd\u72ec\u7acb\u8fd0\u884c\u7684\u57fa\u672c\u5355\u4f4d\u3002\u540c\u4e00\u8fdb\u7a0b\u4e2d\u7684\u591a\u4e2a\u7ebf\u7a0b\u4e4b\u95f4\u53ef\u4ee5\u5e76\u53d1\u6267\u884c\u3002<\/p>\n

37. \u5b88\u62a4\u7ebf\u7a0b\u662f\u4ec0\u4e48\uff1f<\/h2>\n

\u5b88\u62a4\u7ebf\u7a0b\uff08\u5373daemon thread\uff09\uff0c\u662f\u4e2a\u670d\u52a1\u7ebf\u7a0b\uff0c\u51c6\u786e\u5730\u6765\u8bf4\u5c31\u662f\u670d\u52a1\u5176\u4ed6\u7684\u7ebf\u7a0b\u3002<\/p>\n

38. \u521b\u5efa\u7ebf\u7a0b\u6709\u54ea\u51e0\u79cd\u65b9\u5f0f\uff1f<\/h2>\n

\u2460. \u7ee7\u627fThread\u7c7b\u521b\u5efa\u7ebf\u7a0b\u7c7b\u5b9a\u4e49Thread\u7c7b\u7684\u5b50\u7c7b\uff0c\u5e76\u91cd\u5199\u8be5\u7c7b\u7684run\u65b9\u6cd5\uff0c\u8be5run\u65b9\u6cd5\u7684\u65b9\u6cd5\u4f53\u5c31\u4ee3\u8868\u4e86\u7ebf\u7a0b\u8981\u5b8c\u6210\u7684\u4efb\u52a1\u3002\u56e0\u6b64\u628arun()\u65b9\u6cd5\u79f0\u4e3a\u6267\u884c\u4f53\u3002\u521b\u5efaThread\u5b50\u7c7b\u7684\u5b9e\u4f8b\uff0c\u5373\u521b\u5efa\u4e86\u7ebf\u7a0b\u5bf9\u8c61\u3002\u8c03\u7528\u7ebf\u7a0b\u5bf9\u8c61\u7684start()\u65b9\u6cd5\u6765\u542f\u52a8\u8be5\u7ebf\u7a0b\u3002
\n\u2461. \u901a\u8fc7Runnable\u63a5\u53e3\u521b\u5efa\u7ebf\u7a0b\u7c7b\u5b9a\u4e49runnable\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\uff0c\u5e76\u91cd\u5199\u8be5\u63a5\u53e3\u7684run()\u65b9\u6cd5\uff0c\u8be5run()\u65b9\u6cd5\u7684\u65b9\u6cd5\u4f53\u540c\u6837\u662f\u8be5\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u6267\u884c\u4f53\u3002\u521b\u5efa Runnable\u5b9e\u73b0\u7c7b\u7684\u5b9e\u4f8b\uff0c\u5e76\u4f9d\u6b64\u5b9e\u4f8b\u4f5c\u4e3aThread\u7684target\u6765\u521b\u5efaThread\u5bf9\u8c61\uff0c\u8be5Thread\u5bf9\u8c61\u624d\u662f\u771f\u6b63\u7684\u7ebf\u7a0b\u5bf9\u8c61\u3002\u8c03\u7528\u7ebf\u7a0b\u5bf9\u8c61\u7684start()\u65b9\u6cd5\u6765\u542f\u52a8\u8be5\u7ebf\u7a0b\u3002
\n\u2462. \u901a\u8fc7Callable\u548cFuture\u521b\u5efa\u7ebf\u7a0b\u521b\u5efaCallable\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\uff0c\u5e76\u5b9e\u73b0call()\u65b9\u6cd5\uff0c\u8be5call()\u65b9\u6cd5\u5c06\u4f5c\u4e3a\u7ebf\u7a0b\u6267\u884c\u4f53\uff0c\u5e76\u4e14\u6709\u8fd4\u56de\u503c\u3002\u521b\u5efaCallable\u5b9e\u73b0\u7c7b\u7684\u5b9e\u4f8b\uff0c\u4f7f\u7528FutureTask\u7c7b\u6765\u5305\u88c5Callable\u5bf9\u8c61\uff0c\u8be5FutureTask\u5bf9\u8c61\u5c01\u88c5\u4e86\u8be5Callable\u5bf9\u8c61\u7684call()\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u3002\u4f7f\u7528FutureTask\u5bf9\u8c61\u4f5c\u4e3aThread\u5bf9\u8c61\u7684target\u521b\u5efa\u5e76\u542f\u52a8\u65b0\u7ebf\u7a0b\u3002\u8c03\u7528FutureTask\u5bf9\u8c61\u7684get()\u65b9\u6cd5\u6765\u83b7\u5f97\u5b50\u7ebf\u7a0b\u6267\u884c\u7ed3\u675f\u540e\u7684\u8fd4\u56de\u503c\u3002<\/p>\n

39. \u8bf4\u4e00\u4e0b runnable \u548c callable \u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h2>\n

\u6709\u70b9\u6df1\u7684\u95ee\u9898\u4e86\uff0c\u4e5f\u770b\u51fa\u4e00\u4e2aJava\u7a0b\u5e8f\u5458\u5b66\u4e60\u77e5\u8bc6\u7684\u5e7f\u5ea6\u3002Runnable\u63a5\u53e3\u4e2d\u7684run()\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662fvoid\uff0c\u5b83\u505a\u7684\u4e8b\u60c5\u53ea\u662f\u7eaf\u7cb9\u5730\u53bb\u6267\u884crun()\u65b9\u6cd5\u4e2d\u7684\u4ee3\u7801\u800c\u5df2\uff1bCallable\u63a5\u53e3\u4e2d\u7684call()\u65b9\u6cd5\u662f\u6709\u8fd4\u56de\u503c\u7684\uff0c\u662f\u4e00\u4e2a\u6cdb\u578b\uff0c\u548cFuture\u3001FutureTask\u914d\u5408\u53ef\u4ee5\u7528\u6765\u83b7\u53d6\u5f02\u6b65\u6267\u884c\u7684\u7ed3\u679c\u3002<\/p>\n

40. \u7ebf\u7a0b\u6709\u54ea\u4e9b\u72b6\u6001\uff1f<\/h2>\n

\u7ebf\u7a0b\u901a\u5e38\u90fd\u6709\u4e94\u79cd\u72b6\u6001\uff0c\u521b\u5efa\u3001\u5c31\u7eea\u3001\u8fd0\u884c\u3001\u963b\u585e\u548c\u6b7b\u4ea1\u3002\u521b\u5efa\u72b6\u6001\u3002\u5728\u751f\u6210\u7ebf\u7a0b\u5bf9\u8c61\uff0c\u5e76\u6ca1\u6709\u8c03\u7528\u8be5\u5bf9\u8c61\u7684start\u65b9\u6cd5\uff0c\u8fd9\u662f\u7ebf\u7a0b\u5904\u4e8e\u521b\u5efa\u72b6\u6001\u3002\u5c31\u7eea\u72b6\u6001\u3002\u5f53\u8c03\u7528\u4e86\u7ebf\u7a0b\u5bf9\u8c61\u7684start\u65b9\u6cd5\u4e4b\u540e\uff0c\u8be5\u7ebf\u7a0b\u5c31\u8fdb\u5165\u4e86\u5c31\u7eea\u72b6\u6001\uff0c\u4f46\u662f\u6b64\u65f6\u7ebf\u7a0b\u8c03\u5ea6\u7a0b\u5e8f\u8fd8\u6ca1\u6709\u628a\u8be5\u7ebf\u7a0b\u8bbe\u7f6e\u4e3a\u5f53\u524d\u7ebf\u7a0b\uff0c\u6b64\u65f6\u5904\u4e8e\u5c31\u7eea\u72b6\u6001\u3002\u5728\u7ebf\u7a0b\u8fd0\u884c\u4e4b\u540e\uff0c\u4ece\u7b49\u5f85\u6216\u8005\u7761\u7720\u4e2d\u56de\u6765\u4e4b\u540e\uff0c\u4e5f\u4f1a\u5904\u4e8e\u5c31\u7eea\u72b6\u6001\u3002\u8fd0\u884c\u72b6\u6001\u3002\u7ebf\u7a0b\u8c03\u5ea6\u7a0b\u5e8f\u5c06\u5904\u4e8e\u5c31\u7eea\u72b6\u6001\u7684\u7ebf\u7a0b\u8bbe\u7f6e\u4e3a\u5f53\u524d\u7ebf\u7a0b\uff0c\u6b64\u65f6\u7ebf\u7a0b\u5c31\u8fdb\u5165\u4e86\u8fd0\u884c\u72b6\u6001\uff0c\u5f00\u59cb\u8fd0\u884crun\u51fd\u6570\u5f53\u4e2d\u7684\u4ee3\u7801\u3002\u963b\u585e\u72b6\u6001\u3002\u7ebf\u7a0b\u6b63\u5728\u8fd0\u884c\u7684\u65f6\u5019\uff0c\u88ab\u6682\u505c\uff0c\u901a\u5e38\u662f\u4e3a\u4e86\u7b49\u5f85\u67d0\u4e2a\u65f6\u95f4\u7684\u53d1\u751f(\u6bd4\u5982\u8bf4\u67d0\u9879\u8d44\u6e90\u5c31\u7eea)\u4e4b\u540e\u518d\u7ee7\u7eed\u8fd0\u884c\u3002sleep,suspend\uff0cwait\u7b49\u65b9\u6cd5\u90fd\u53ef\u4ee5\u5bfc\u81f4\u7ebf\u7a0b\u963b\u585e\u3002\u6b7b\u4ea1\u72b6\u6001\u3002\u5982\u679c\u4e00\u4e2a\u7ebf\u7a0b\u7684run\u65b9\u6cd5\u6267\u884c\u7ed3\u675f\u6216\u8005\u8c03\u7528stop\u65b9\u6cd5\u540e\uff0c\u8be5\u7ebf\u7a0b\u5c31\u4f1a\u6b7b\u4ea1\u3002\u5bf9\u4e8e\u5df2\u7ecf\u6b7b\u4ea1\u7684\u7ebf\u7a0b\uff0c\u65e0\u6cd5\u518d\u4f7f\u7528start\u65b9\u6cd5\u4ee4\u5176\u8fdb\u5165\u5c31\u7eea <\/p>\n

41. sleep() \u548c wait() \u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h2>\n

sleep()\uff1a\u65b9\u6cd5\u662f\u7ebf\u7a0b\u7c7b\uff08Thread\uff09\u7684\u9759\u6001\u65b9\u6cd5\uff0c\u8ba9\u8c03\u7528\u7ebf\u7a0b\u8fdb\u5165\u7761\u7720\u72b6\u6001\uff0c\u8ba9\u51fa\u6267\u884c\u673a\u4f1a\u7ed9\u5176\u4ed6\u7ebf\u7a0b\uff0c\u7b49\u5230\u4f11\u7720\u65f6\u95f4\u7ed3\u675f\u540e\uff0c\u7ebf\u7a0b\u8fdb\u5165\u5c31\u7eea\u72b6\u6001\u548c\u5176\u4ed6\u7ebf\u7a0b\u4e00\u8d77\u7ade\u4e89cpu\u7684\u6267\u884c\u65f6\u95f4\u3002\u56e0\u4e3asleep() \u662fstatic\u9759\u6001\u7684\u65b9\u6cd5\uff0c\u4ed6\u4e0d\u80fd\u6539\u53d8\u5bf9\u8c61\u7684\u673a\u9501\uff0c\u5f53\u4e00\u4e2asynchronized\u5757\u4e2d\u8c03\u7528\u4e86sleep() \u65b9\u6cd5\uff0c\u7ebf\u7a0b\u867d\u7136\u8fdb\u5165\u4f11\u7720\uff0c\u4f46\u662f\u5bf9\u8c61\u7684\u673a\u9501\u6ca1\u6709\u88ab\u91ca\u653e\uff0c\u5176\u4ed6\u7ebf\u7a0b\u4f9d\u7136\u65e0\u6cd5\u8bbf\u95ee\u8fd9\u4e2a\u5bf9\u8c61\u3002wait()\uff1await()\u662fObject\u7c7b\u7684\u65b9\u6cd5\uff0c\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u5230wait\u65b9\u6cd5\u65f6\uff0c\u5b83\u5c31\u8fdb\u5165\u5230\u4e00\u4e2a\u548c\u8be5\u5bf9\u8c61\u76f8\u5173\u7684\u7b49\u5f85\u6c60\uff0c\u540c\u65f6\u91ca\u653e\u5bf9\u8c61\u7684\u673a\u9501\uff0c\u4f7f\u5f97\u5176\u4ed6\u7ebf\u7a0b\u80fd\u591f\u8bbf\u95ee\uff0c\u53ef\u4ee5\u901a\u8fc7notify\uff0cnotifyAll\u65b9\u6cd5\u6765\u5524\u9192\u7b49\u5f85\u7684\u7ebf\u7a0b<\/p>\n

42. notify()\u548c notifyAll()\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h2>\n

\u5982\u679c\u7ebf\u7a0b\u8c03\u7528\u4e86\u5bf9\u8c61\u7684 wait()\u65b9\u6cd5\uff0c\u90a3\u4e48\u7ebf\u7a0b\u4fbf\u4f1a\u5904\u4e8e\u8be5\u5bf9\u8c61\u7684\u7b49\u5f85\u6c60\u4e2d\uff0c\u7b49\u5f85\u6c60\u4e2d\u7684\u7ebf\u7a0b\u4e0d\u4f1a\u53bb\u7ade\u4e89\u8be5\u5bf9\u8c61\u7684\u9501\u3002\u5f53\u6709\u7ebf\u7a0b\u8c03\u7528\u4e86\u5bf9\u8c61\u7684 notifyAll()\u65b9\u6cd5\uff08\u5524\u9192\u6240\u6709 wait \u7ebf\u7a0b\uff09\u6216 notify()\u65b9\u6cd5\uff08\u53ea\u968f\u673a\u5524\u9192\u4e00\u4e2a wait \u7ebf\u7a0b\uff09\uff0c\u88ab\u5524\u9192\u7684\u7684\u7ebf\u7a0b\u4fbf\u4f1a\u8fdb\u5165\u8be5\u5bf9\u8c61\u7684\u9501\u6c60\u4e2d\uff0c\u9501\u6c60\u4e2d\u7684\u7ebf\u7a0b\u4f1a\u53bb\u7ade\u4e89\u8be5\u5bf9\u8c61\u9501\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u8c03\u7528\u4e86notify\u540e\u53ea\u8981\u4e00\u4e2a\u7ebf\u7a0b\u4f1a\u7531\u7b49\u5f85\u6c60\u8fdb\u5165\u9501\u6c60\uff0c\u800cnotifyAll\u4f1a\u5c06\u8be5\u5bf9\u8c61\u7b49\u5f85\u6c60\u5185\u7684\u6240\u6709\u7ebf\u7a0b\u79fb\u52a8\u5230\u9501\u6c60\u4e2d\uff0c\u7b49\u5f85\u9501\u7ade\u4e89\u3002\u4f18\u5148\u7ea7\u9ad8\u7684\u7ebf\u7a0b\u7ade\u4e89\u5230\u5bf9\u8c61\u9501\u7684\u6982\u7387\u5927\uff0c\u5047\u82e5\u67d0\u7ebf\u7a0b\u6ca1\u6709\u7ade\u4e89\u5230\u8be5\u5bf9\u8c61\u9501\uff0c\u5b83\u8fd8\u4f1a\u7559\u5728\u9501\u6c60\u4e2d\uff0c\u552f\u6709\u7ebf\u7a0b\u518d\u6b21\u8c03\u7528 wait()\u65b9\u6cd5\uff0c\u5b83\u624d\u4f1a\u91cd\u65b0\u56de\u5230\u7b49\u5f85\u6c60\u4e2d\u3002\u800c\u7ade\u4e89\u5230\u5bf9\u8c61\u9501\u7684\u7ebf\u7a0b\u5219\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\uff0c\u76f4\u5230\u6267\u884c\u5b8c\u4e86 synchronized \u4ee3\u7801\u5757\uff0c\u5b83\u4f1a\u91ca\u653e\u6389\u8be5\u5bf9\u8c61\u9501\uff0c\u8fd9\u65f6\u9501\u6c60\u4e2d\u7684\u7ebf\u7a0b\u4f1a\u7ee7\u7eed\u7ade\u4e89\u8be5\u5bf9\u8c61\u9501\u3002<\/p>\n

43. \u7ebf\u7a0b\u7684 run()\u548c start()\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h2>\n

\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u662f\u901a\u8fc7\u67d0\u4e2a\u7279\u5b9aThread\u5bf9\u8c61\u6240\u5bf9\u5e94\u7684\u65b9\u6cd5run()\u6765\u5b8c\u6210\u5176\u64cd\u4f5c\u7684\uff0c\u65b9\u6cd5run()\u79f0\u4e3a\u7ebf\u7a0b\u4f53\u3002\u901a\u8fc7\u8c03\u7528Thread\u7c7b\u7684start()\u65b9\u6cd5\u6765\u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b\u3002start()\u65b9\u6cd5\u6765\u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u771f\u6b63\u5b9e\u73b0\u4e86\u591a\u7ebf\u7a0b\u8fd0\u884c\u3002\u8fd9\u65f6\u65e0\u9700\u7b49\u5f85run\u65b9\u6cd5\u4f53\u4ee3\u7801\u6267\u884c\u5b8c\u6bd5\uff0c\u53ef\u4ee5\u76f4\u63a5\u7ee7\u7eed\u6267\u884c\u4e0b\u9762\u7684\u4ee3\u7801\uff1b \u8fd9\u65f6\u6b64\u7ebf\u7a0b\u662f\u5904\u4e8e\u5c31\u7eea\u72b6\u6001\uff0c \u5e76\u6ca1\u6709\u8fd0\u884c\u3002 \u7136\u540e\u901a\u8fc7\u6b64Thread\u7c7b\u8c03\u7528\u65b9\u6cd5run()\u6765\u5b8c\u6210\u5176\u8fd0\u884c\u72b6\u6001\uff0c \u8fd9\u91cc\u65b9\u6cd5run()\u79f0\u4e3a\u7ebf\u7a0b\u4f53\uff0c\u5b83\u5305\u542b\u4e86\u8981\u6267\u884c\u7684\u8fd9\u4e2a\u7ebf\u7a0b\u7684\u5185\u5bb9\uff0c Run\u65b9\u6cd5\u8fd0\u884c\u7ed3\u675f\uff0c \u6b64\u7ebf\u7a0b\u7ec8\u6b62\u3002\u7136\u540eCPU\u518d\u8c03\u5ea6\u5176\u5b83\u7ebf\u7a0b\u3002run()\u65b9\u6cd5\u662f\u5728\u672c\u7ebf\u7a0b\u91cc\u7684\uff0c\u53ea\u662f\u7ebf\u7a0b\u91cc\u7684\u4e00\u4e2a\u51fd\u6570,\u800c\u4e0d\u662f\u591a\u7ebf\u7a0b\u7684\u3002 \u5982\u679c\u76f4\u63a5\u8c03\u7528run(),\u5176\u5b9e\u5c31\u76f8\u5f53\u4e8e\u662f\u8c03\u7528\u4e86\u4e00\u4e2a\u666e\u901a\u51fd\u6570\u800c\u5df2\uff0c\u76f4\u63a5\u5f85\u7528run()\u65b9\u6cd5\u5fc5\u987b\u7b49\u5f85run()\u65b9\u6cd5\u6267\u884c\u5b8c\u6bd5\u624d\u80fd\u6267\u884c\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u6240\u4ee5\u6267\u884c\u8def\u5f84\u8fd8\u662f\u53ea\u6709\u4e00\u6761\uff0c\u6839\u672c\u5c31\u6ca1\u6709\u7ebf\u7a0b\u7684\u7279\u5f81\uff0c\u6240\u4ee5\u5728\u591a\u7ebf\u7a0b\u6267\u884c\u65f6\u8981\u4f7f\u7528start()\u65b9\u6cd5\u800c\u4e0d\u662frun()\u65b9\u6cd5\u3002<\/p>\n

44. \u521b\u5efa\u7ebf\u7a0b\u6c60\u6709\u54ea\u51e0\u79cd\u65b9\u5f0f\uff1f<\/h2>\n

\u2460. newFixedThreadPool(int nThreads)\u521b\u5efa\u4e00\u4e2a\u56fa\u5b9a\u957f\u5ea6\u7684\u7ebf\u7a0b\u6c60\uff0c\u6bcf\u5f53\u63d0\u4ea4\u4e00\u4e2a\u4efb\u52a1\u5c31\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u76f4\u5230\u8fbe\u5230\u7ebf\u7a0b\u6c60\u7684\u6700\u5927\u6570\u91cf\uff0c\u8fd9\u65f6\u7ebf\u7a0b\u89c4\u6a21\u5c06\u4e0d\u518d\u53d8\u5316\uff0c\u5f53\u7ebf\u7a0b\u53d1\u751f\u672a\u9884\u671f\u7684\u9519\u8bef\u800c\u7ed3\u675f\u65f6\uff0c\u7ebf\u7a0b\u6c60\u4f1a\u8865\u5145\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\u3002
\n\u2461. newCachedThreadPool()\u521b\u5efa\u4e00\u4e2a\u53ef\u7f13\u5b58\u7684\u7ebf\u7a0b\u6c60\uff0c\u5982\u679c\u7ebf\u7a0b\u6c60\u7684\u89c4\u6a21\u8d85\u8fc7\u4e86\u5904\u7406\u9700\u6c42\uff0c\u5c06\u81ea\u52a8\u56de\u6536\u7a7a\u95f2\u7ebf\u7a0b\uff0c\u800c\u5f53\u9700\u6c42\u589e\u52a0\u65f6\uff0c\u5219\u53ef\u4ee5\u81ea\u52a8\u6dfb\u52a0\u65b0\u7ebf\u7a0b\uff0c\u7ebf\u7a0b\u6c60\u7684\u89c4\u6a21\u4e0d\u5b58\u5728\u4efb\u4f55\u9650\u5236\u3002
\n\u2462. newSingleThreadExecutor()\u8fd9\u662f\u4e00\u4e2a\u5355\u7ebf\u7a0b\u7684Executor\uff0c\u5b83\u521b\u5efa\u5355\u4e2a\u5de5\u4f5c\u7ebf\u7a0b\u6765\u6267\u884c\u4efb\u52a1\uff0c\u5982\u679c\u8fd9\u4e2a\u7ebf\u7a0b\u5f02\u5e38\u7ed3\u675f\uff0c\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6765\u66ff\u4ee3\u5b83\uff1b\u5b83\u7684\u7279\u70b9\u662f\u80fd\u786e\u4fdd\u4f9d\u7167\u4efb\u52a1\u5728\u961f\u5217\u4e2d\u7684\u987a\u5e8f\u6765\u4e32\u884c\u6267\u884c\u3002\u2463. newScheduledThreadPool(int corePoolSize)\u521b\u5efa\u4e86\u4e00\u4e2a\u56fa\u5b9a\u957f\u5ea6\u7684\u7ebf\u7a0b\u6c60\uff0c\u800c\u4e14\u4ee5\u5ef6\u8fdf\u6216\u5b9a\u65f6\u7684\u65b9\u5f0f\u6765\u6267\u884c\u4efb\u52a1\uff0c\u7c7b\u4f3c\u4e8eTimer\u3002<\/p>\n

45. \u7ebf\u7a0b\u6c60\u90fd\u6709\u54ea\u4e9b\u72b6\u6001\uff1f<\/h2>\n

\u7ebf\u7a0b\u6c60\u67095\u79cd\u72b6\u6001\uff1aRunning\u3001ShutDown\u3001Stop\u3001Tidying\u3001Terminated\u3002\u7ebf\u7a0b\u6c60\u5404\u4e2a\u72b6\u6001\u5207\u6362\u6846\u67b6\u56fe\uff1a<\/p>\n

46. \u7ebf\u7a0b\u6c60\u4e2d submit()\u548c execute()\u65b9\u6cd5\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h2>\n

\u63a5\u6536\u7684\u53c2\u6570\u4e0d\u4e00\u6837submit\u6709\u8fd4\u56de\u503c\uff0c\u800cexecute\u6ca1\u6709submit\u65b9\u4fbfException\u5904\u7406<\/p>\n

47. \u5728 java \u7a0b\u5e8f\u4e2d\u600e\u4e48\u4fdd\u8bc1\u591a\u7ebf\u7a0b\u7684\u8fd0\u884c\u5b89\u5168\uff1f<\/h2>\n

\u7ebf\u7a0b\u5b89\u5168\u5728\u4e09\u4e2a\u65b9\u9762\u4f53\u73b0\uff1a\u539f\u5b50\u6027\uff1a\u63d0\u4f9b\u4e92\u65a5\u8bbf\u95ee\uff0c\u540c\u4e00\u65f6\u523b\u53ea\u80fd\u6709\u4e00\u4e2a\u7ebf\u7a0b\u5bf9\u6570\u636e\u8fdb\u884c\u64cd\u4f5c\uff0c\uff08atomic,synchronized\uff09\uff1b\u53ef\u89c1\u6027\uff1a\u4e00\u4e2a\u7ebf\u7a0b\u5bf9\u4e3b\u5185\u5b58\u7684\u4fee\u6539\u53ef\u4ee5\u53ca
\n\u65f6\u5730\u88ab\u5176\u4ed6\u7ebf\u7a0b\u770b\u5230\uff0c\uff08synchronized,volatile\uff09\uff1b\u6709\u5e8f\u6027\uff1a\u4e00\u4e2a\u7ebf\u7a0b\u89c2\u5bdf\u5176\u4ed6\u7ebf\u7a0b\u4e2d\u7684\u6307\u4ee4\u6267\u884c\u987a\u5e8f\uff0c\u7531\u4e8e\u6307\u4ee4\u91cd\u6392\u5e8f\uff0c\u8be5\u89c2\u5bdf\u7ed3\u679c\u4e00\u822c\u6742\u4e71\u65e0\u5e8f\uff0c\uff08happens-before\u539f\u5219\uff09\u3002<\/p>\n

48. \u591a\u7ebf\u7a0b\u9501\u7684\u5347\u7ea7\u539f\u7406\u662f\u4ec0\u4e48\uff1f<\/h2>\n

\u5728Java\u4e2d\uff0c\u9501\u5171\u67094\u79cd\u72b6\u6001\uff0c\u7ea7\u522b\u4ece\u4f4e\u5230\u9ad8\u4f9d\u6b21\u4e3a\uff1a\u65e0\u72b6\u6001\u9501\uff0c\u504f\u5411\u9501\uff0c\u8f7b\u91cf\u7ea7\u9501\u548c\u91cd\u91cf\u7ea7\u9501\u72b6\u6001\uff0c\u8fd9\u51e0\u4e2a\u72b6\u6001\u4f1a\u968f\u7740\u7ade\u4e89\u60c5\u51b5\u9010\u6e10\u5347\u7ea7\u3002\u9501\u53ef\u4ee5\u5347\u7ea7\u4f46\u4e0d\u80fd\u964d\u7ea7\u3002\u9501\u5347\u7ea7\u7684\u56fe\u793a\u8fc7\u7a0b\uff1a <\/p>\n

49. \u4ec0\u4e48\u662f\u6b7b\u9501\uff1f<\/h2>\n

\u6b7b\u9501\u662f\u6307\u4e24\u4e2a\u6216\u4e24\u4e2a\u4ee5\u4e0a\u7684\u8fdb\u7a0b\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u7531\u4e8e\u7ade\u4e89\u8d44\u6e90\u6216\u8005\u7531\u4e8e\u5f7c\u6b64\u901a\u4fe1\u800c\u9020\u6210\u7684\u4e00\u79cd\u963b\u585e\u7684\u73b0\u8c61\uff0c\u82e5\u65e0\u5916\u529b\u4f5c\u7528\uff0c\u5b83\u4eec\u90fd\u5c06\u65e0\u6cd5\u63a8\u8fdb\u4e0b\u53bb\u3002\u6b64\u65f6\u79f0\u7cfb\u7edf\u5904\u4e8e\u6b7b\u9501\u72b6\u6001\u6216\u7cfb\u7edf\u4ea7\u751f\u4e86\u6b7b\u9501\uff0c\u8fd9\u4e9b\u6c38\u8fdc\u5728\u4e92\u76f8\u7b49\u5f85\u7684\u8fdb\u7a0b\u79f0\u4e3a\u6b7b\u9501\u8fdb\u7a0b\u3002\u662f\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u7684\u4e00\u4e2a\u9519\u8bef\uff0c\u662f\u8fdb\u7a0b\u6b7b\u9501\u7684\u7b80\u79f0\uff0c\u6700\u65e9\u5728 1965 \u5e74\u7531 Dijkstra \u5728\u7814\u7a76\u94f6\u884c\u5bb6\u7b97\u6cd5\u65f6\u63d0\u51fa\u7684\uff0c\u5b83\u662f\u8ba1\u7b97\u673a\u64cd\u4f5c\u7cfb\u7edf\u4e43\u81f3\u6574\u4e2a\u5e76\u53d1\u7a0b\u5e8f\u8bbe\u8ba1\u9886\u57df\u6700\u96be\u5904\u7406\u7684\u95ee\u9898\u4e4b\u4e00\u3002<\/p>\n

50. \u600e\u4e48\u9632\u6b62\u6b7b\u9501\uff1f<\/h2>\n

\u6b7b\u9501\u7684\u56db\u4e2a\u5fc5\u8981\u6761\u4ef6\uff1a
\n\u4e92\u65a5\u6761\u4ef6\uff1a\u8fdb\u7a0b\u5bf9\u6240\u5206\u914d\u5230\u7684\u8d44\u6e90\u4e0d\u5141\u8bb8\u5176\u4ed6\u8fdb\u7a0b\u8fdb\u884c\u8bbf\u95ee\uff0c\u82e5\u5176\u4ed6\u8fdb\u7a0b\u8bbf\u95ee\u8be5\u8d44\u6e90\uff0c\u53ea\u80fd\u7b49\u5f85\uff0c\u76f4\u81f3\u5360\u6709\u8be5\u8d44\u6e90\u7684\u8fdb\u7a0b\u4f7f\u7528\u5b8c\u6210\u540e\u91ca\u653e\u8be5\u8d44\u6e90\u8bf7\u6c42\u548c\u4fdd\u6301\u6761\u4ef6\uff1a\u8fdb\u7a0b\u83b7\u5f97\u4e00\u5b9a\u7684\u8d44\u6e90\u4e4b\u540e\uff0c\u53c8\u5bf9\u5176\u4ed6\u8d44\u6e90\u53d1\u51fa\u8bf7\u6c42\uff0c\u4f46\u662f\u8be5\u8d44\u6e90\u53ef\u80fd\u88ab\u5176\u4ed6\u8fdb\u7a0b\u5360\u6709\uff0c\u6b64\u4e8b\u8bf7\u6c42\u963b\u585e\uff0c\u4f46\u53c8\u5bf9\u81ea\u5df1\u83b7\u5f97\u7684\u8d44\u6e90\u4fdd\u6301\u4e0d\u653e\u4e0d\u53ef\u5265\u593a\u6761\u4ef6\uff1a\u662f\u6307\u8fdb\u7a0b\u5df2\u83b7\u5f97\u7684\u8d44\u6e90\uff0c\u5728\u672a\u5b8c\u6210\u4f7f\u7528\u4e4b\u524d\uff0c\u4e0d\u53ef\u88ab\u5265\u593a\uff0c\u53ea\u80fd\u5728\u4f7f\u7528\u5b8c\u540e\u81ea\u5df1\u91ca\u653e\u73af\u8def\u7b49\u5f85\u6761\u4ef6\uff1a\u662f\u6307\u8fdb\u7a0b\u53d1\u751f\u6b7b\u9501\u540e\uff0c\u82e5\u5e72\u8fdb\u7a0b\u4e4b\u95f4\u5f62\u6210\u4e00\u79cd\u5934\u5c3e\u76f8\u63a5\u7684\u5faa\u73af\u7b49\u5f85\u8d44\u6e90\u5173\u7cfb\u8fd9\u56db\u4e2a\u6761\u4ef6\u662f\u6b7b\u9501\u7684\u5fc5\u8981\u6761\u4ef6\uff0c\u53ea\u8981\u7cfb\u7edf\u53d1\u751f\u6b7b\u9501\uff0c\u8fd9\u4e9b\u6761\u4ef6\u5fc5\u7136\u6210\u7acb\uff0c\u800c\u53ea\u8981\u4e0a\u8ff0\u6761\u4ef6\u4e4b \u4e00\u4e0d\u6ee1\u8db3\uff0c\u5c31\u4e0d\u4f1a\u53d1\u751f\u6b7b\u9501\u3002\u7406\u89e3\u4e86\u6b7b\u9501\u7684\u539f\u56e0\uff0c\u5c24\u5176\u662f\u4ea7\u751f\u6b7b\u9501\u7684\u56db\u4e2a\u5fc5\u8981\u6761\u4ef6\uff0c\u5c31\u53ef\u4ee5\u6700\u5927\u53ef\u80fd\u5730\u907f\u514d\u3001\u9884\u9632\u548c \u89e3\u9664\u6b7b\u9501\u3002\u6240\u4ee5\uff0c\u5728\u7cfb\u7edf\u8bbe\u8ba1\u3001\u8fdb\u7a0b\u8c03\u5ea6\u7b49\u65b9\u9762\u6ce8\u610f\u5982\u4f55\u4e0d\u8ba9\u8fd9\u56db\u4e2a\u5fc5\u8981\u6761\u4ef6\u6210\u7acb\uff0c\u5982\u4f55\u786e \u5b9a\u8d44\u6e90\u7684\u5408\u7406\u5206\u914d\u7b97\u6cd5\uff0c\u907f\u514d\u8fdb\u7a0b\u6c38\u4e45\u5360\u636e\u7cfb\u7edf\u8d44\u6e90\u3002\u6b64\u5916\uff0c\u4e5f\u8981\u9632\u6b62\u8fdb\u7a0b\u5728\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\u7684\u60c5\u51b5\u4e0b\u5360\u7528\u8d44\u6e90\u3002\u56e0\u6b64\uff0c\u5bf9\u8d44\u6e90\u7684\u5206\u914d\u8981\u7ed9\u4e88\u5408\u7406\u7684\u89c4\u5212\u3002<\/p>\n

51. ThreadLocal \u662f\u4ec0\u4e48\uff1f<\/h2>\n

\u6709\u54ea\u4e9b\u4f7f\u7528\u573a\u666f\uff1f\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\u662f\u5c40\u9650\u4e8e\u7ebf\u7a0b\u5185\u90e8\u7684\u53d8\u91cf\uff0c\u5c5e\u4e8e\u7ebf\u7a0b\u81ea\u8eab\u6240\u6709\uff0c\u4e0d\u5728\u591a\u4e2a\u7ebf\u7a0b\u95f4\u5171\u4eab\u3002Java\u63d0\u4f9bThreadLocal\u7c7b\u6765\u652f\u6301\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\uff0c\u662f\u4e00\u79cd\u5b9e\u73b0\u7ebf\u7a0b\u5b89\u5168\u7684\u65b9\u5f0f\u3002\u4f46\u662f\u5728\u7ba1\u7406\u73af\u5883\u4e0b\uff08\u5982 web \u670d\u52a1\u5668\uff09\u4f7f\u7528\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\u7684\u65f6\u5019\u8981\u7279\u522b\u5c0f\u5fc3\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5de5\u4f5c\u7ebf\u7a0b\u7684\u751f\u547d\u5468\u671f\u6bd4\u4efb\u4f55\u5e94\u7528\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u90fd\u8981\u957f\u3002\u4efb\u4f55\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\u4e00\u65e6\u5728\u5de5\u4f5c\u5b8c\u6210\u540e\u6ca1\u6709\u91ca\u653e\uff0cJava \u5e94\u7528\u5c31\u5b58\u5728\u5185\u5b58\u6cc4\u9732\u7684\u98ce\u9669\u3002<\/p>\n

52.\u8bf4\u4e00\u4e0b synchronized \u5e95\u5c42\u5b9e\u73b0\u539f\u7406\uff1f<\/h2>\n

synchronized\u53ef\u4ee5\u4fdd\u8bc1\u65b9\u6cd5\u6216\u8005\u4ee3\u7801\u5757\u5728\u8fd0\u884c\u65f6\uff0c\u540c\u4e00\u65f6\u523b\u53ea\u6709\u4e00\u4e2a\u65b9\u6cd5\u53ef\u4ee5\u8fdb\u5165\u5230\u4e34\u754c\u533a\uff0c\u540c\u65f6\u5b83\u8fd8\u53ef\u4ee5\u4fdd\u8bc1\u5171\u4eab\u53d8\u91cf\u7684\u5185\u5b58\u53ef\u89c1\u6027\u3002Java\u4e2d\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u90fd\u53ef\u4ee5\u4f5c\u4e3a\u9501\uff0c\u8fd9\u662fsynchronized\u5b9e\u73b0\u540c\u6b65\u7684\u57fa\u7840\uff1a\u666e\u901a\u540c\u6b65\u65b9\u6cd5\uff0c\u9501\u662f\u5f53\u524d\u5b9e\u4f8b\u5bf9\u8c61\u9759\u6001\u540c\u6b65\u65b9\u6cd5\uff0c\u9501\u662f\u5f53\u524d\u7c7b\u7684class\u5bf9\u8c61\u540c\u6b65\u65b9\u6cd5\u5757\uff0c\u9501\u662f\u62ec\u53f7\u91cc\u9762\u7684\u5bf9\u8c61<\/p>\n

53. synchronized \u548c volatile \u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/h2>\n

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 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\u3002volatile\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\u3002volatile\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\u3002volatile\u4e0d\u4f1a\u9020\u6210\u7ebf\u7a0b\u7684\u963b\u585e\uff1bsynchronized\u53ef\u80fd\u4f1a\u9020\u6210\u7ebf\u7a0b\u7684\u963b\u585e\u3002volatile\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<\/p>\n

54. synchronized \u548c Lock \u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h2>\n

\u9996\u5148synchronized\u662fjava\u5185\u7f6e\u5173\u952e\u5b57\uff0c\u5728jvm\u5c42\u9762\uff0cLock\u662f\u4e2ajava\u7c7b\uff1b
\nsynchronized\u65e0\u6cd5\u5224\u65ad\u662f\u5426\u83b7\u53d6\u9501\u7684\u72b6\u6001\uff0cLock\u53ef\u4ee5\u5224\u65ad\u662f\u5426\u83b7\u53d6\u5230\u9501\uff1b
\nsynchronized\u4f1a\u81ea\u52a8\u91ca\u653e\u9501(a \u7ebf\u7a0b\u6267\u884c\u5b8c\u540c\u6b65\u4ee3\u7801\u4f1a\u91ca\u653e\u9501 \uff1b
\nb \u7ebf\u7a0b\u6267\u884c\u8fc7\u7a0b\u4e2d\u53d1\u751f\u5f02\u5e38\u4f1a\u91ca\u653e\u9501)\uff0cLock\u9700\u5728finally\u4e2d\u624b\u5de5\u91ca\u653e\u9501\uff08unlock()\u65b9\u6cd5\u91ca\u653e\u9501\uff09\uff0c\u5426\u5219\u5bb9\u6613\u9020\u6210\u7ebf\u7a0b\u6b7b\u9501\uff1b\u7528synchronized\u5173\u952e\u5b57\u7684\u4e24\u4e2a\u7ebf\u7a0b1\u548c\u7ebf\u7a0b2\uff0c\u5982\u679c\u5f53\u524d\u7ebf\u7a0b1\u83b7\u5f97\u9501\uff0c\u7ebf\u7a0b2\u7ebf\u7a0b\u7b49\u5f85\u3002\u5982\u679c\u7ebf\u7a0b1\u963b\u585e\uff0c\u7ebf\u7a0b2\u5219\u4f1a\u4e00\u76f4\u7b49\u5f85\u4e0b\u53bb\uff0c\u800cLock\u9501\u5c31\u4e0d\u4e00\u5b9a\u4f1a\u7b49\u5f85\u4e0b\u53bb\uff0c\u5982\u679c\u5c1d\u8bd5\u83b7\u53d6\u4e0d\u5230\u9501\uff0c\u7ebf\u7a0b\u53ef\u4ee5\u4e0d\u7528\u4e00\u76f4\u7b49\u5f85\u5c31\u7ed3\u675f\u4e86\uff1b
\nsynchronized\u7684\u9501\u53ef\u91cd\u5165\u3001\u4e0d\u53ef\u4e2d\u65ad\u3001\u975e\u516c\u5e73\uff0c\u800cLock\u9501\u53ef\u91cd\u5165\u3001\u53ef\u5224\u65ad\u3001\u53ef\u516c\u5e73\uff08\u4e24\u8005\u7686\u53ef\uff09\uff1b
\nLock\u9501\u9002\u5408\u5927\u91cf\u540c\u6b65\u7684\u4ee3\u7801\u7684\u540c\u6b65\u95ee\u9898\uff0csynchronized\u9501\u9002\u5408\u4ee3\u7801\u5c11\u91cf\u7684\u540c\u6b65\u95ee\u9898\u3002<\/p>\n

55. synchronized \u548c ReentrantLock \u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/h2>\n

synchronized\u662f\u548cif\u3001else\u3001for\u3001while\u4e00\u6837\u7684\u5173\u952e\u5b57\uff0cReentrantLock\u662f\u7c7b\uff0c\u8fd9\u662f\u4e8c\u8005\u7684\u672c\u8d28\u533a\u522b\u3002\u65e2\u7136ReentrantLock\u662f\u7c7b\uff0c\u90a3\u4e48\u5b83\u5c31\u63d0\u4f9b\u4e86\u6bd4synchronized\u66f4\u591a\u66f4\u7075\u6d3b\u7684\u7279\u6027\uff0c\u53ef\u4ee5\u88ab\u7ee7\u627f\u3001\u53ef\u4ee5\u6709\u65b9\u6cd5\u3001\u53ef\u4ee5\u6709\u5404\u79cd\u5404\u6837\u7684\u7c7b\u53d8\u91cf\uff0cReentrantLock\u6bd4synchronized\u7684\u6269\u5c55\u6027\u4f53\u73b0\u5728\u51e0\u70b9\u4e0a\uff1a ReentrantLock\u53ef\u4ee5\u5bf9\u83b7\u53d6\u9501\u7684\u7b49\u5f85\u65f6\u95f4\u8fdb\u884c\u8bbe\u7f6e\uff0c\u8fd9\u6837\u5c31\u907f\u514d\u4e86\u6b7b\u9501 ReentrantLock\u53ef\u4ee5\u83b7\u53d6\u5404\u79cd\u9501\u7684\u4fe1\u606fReentrantLock\u53ef\u4ee5\u7075\u6d3b\u5730\u5b9e\u73b0\u591a\u8def\u901a\u77e5 \u53e6\u5916\uff0c\u4e8c\u8005\u7684\u9501\u673a\u5236\u5176\u5b9e\u4e5f\u662f\u4e0d\u4e00\u6837\u7684:ReentrantLock\u5e95\u5c42\u8c03\u7528\u7684\u662fUnsafe\u7684park\u65b9\u6cd5\u52a0\u9501\uff0csynchronized\u64cd\u4f5c\u7684\u5e94\u8be5\u662f\u5bf9\u8c61\u5934\u4e2dmark word\u3002<\/p>\n

56. \u8bf4\u4e00\u4e0b atomic \u7684\u539f\u7406\uff1f<\/h2>\n

Atomic\u5305\u4e2d\u7684\u7c7b\u57fa\u672c\u7684\u7279\u6027\u5c31\u662f\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\uff0c\u5f53\u6709\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u5bf9\u5355\u4e2a\uff08\u5305\u62ec\u57fa\u672c\u7c7b\u578b\u53ca\u5f15\u7528\u7c7b\u578b\uff09\u53d8\u91cf\u8fdb\u884c\u64cd\u4f5c\u65f6\uff0c\u5177\u6709\u6392\u4ed6\u6027\uff0c\u5373\u5f53\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u5bf9\u8be5\u53d8\u91cf\u7684\u503c\u8fdb\u884c\u66f4\u65b0\u65f6\uff0c\u4ec5\u6709\u4e00\u4e2a\u7ebf\u7a0b\u80fd\u6210\u529f\uff0c\u800c\u672a\u6210\u529f\u7684\u7ebf\u7a0b\u53ef\u4ee5\u5411\u81ea\u65cb\u9501\u4e00\u6837\uff0c\u7ee7\u7eed\u5c1d\u8bd5\uff0c\u4e00\u76f4\u7b49\u5230\u6267\u884c\u6210\u529f\u3002Atomic\u7cfb\u5217\u7684\u7c7b\u4e2d\u7684\u6838\u5fc3\u65b9\u6cd5\u90fd\u4f1a\u8c03\u7528unsafe\u7c7b\u4e2d\u7684\u51e0\u4e2a\u672c\u5730\u65b9\u6cd5\u3002\u6211\u4eec\u9700\u8981\u5148\u77e5\u9053\u4e00\u4e2a\u4e1c\u897f\u5c31\u662fUnsafe\u7c7b\uff0c\u5168\u540d\u4e3a\uff1asun.misc.Unsafe\uff0c\u8fd9\u4e2a\u7c7b\u5305\u542b\u4e86\u5927\u91cf\u7684\u5bf9C\u4ee3\u7801\u7684\u64cd\u4f5c\uff0c\u5305\u62ec\u5f88\u591a\u76f4\u63a5\u5185\u5b58\u5206\u914d\u4ee5\u53ca\u539f\u5b50\u64cd\u4f5c\u7684\u8c03\u7528\uff0c\u800c\u5b83\u4e4b\u6240\u4ee5\u6807\u8bb0\u4e3a\u975e\u5b89\u5168\u7684\uff0c\u662f\u544a\u8bc9\u4f60\u8fd9\u4e2a\u91cc\u9762\u5927\u91cf\u7684\u65b9\u6cd5\u8c03\u7528\u90fd\u4f1a\u5b58\u5728\u5b89\u5168\u9690\u60a3\uff0c\u9700\u8981\u5c0f\u5fc3\u4f7f\u7528\uff0c\u5426\u5219\u4f1a\u5bfc\u81f4\u4e25\u91cd\u7684\u540e\u679c\uff0c\u4f8b\u5982\u5728\u901a\u8fc7unsafe\u5206\u914d\u5185\u5b58\u7684\u65f6\u5019\uff0c\u5982\u679c\u81ea\u5df1\u6307\u5b9a\u67d0\u4e9b\u533a\u57df\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u7c7b\u4f3cC++\u4e00\u6837\u7684\u6307\u9488\u8d8a\u754c\u5230\u5176\u4ed6\u8fdb\u7a0b\u7684\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

35. \u5e76\u884c\u548c\u5e76\u53d1\u6709\u4ec0\u4e48\u533a\u522b\uff1f \u5e76\u884c\u662f\u6307\u4e24\u4e2a\u6216\u8005\u591a\u4e2a\u4e8b\u4ef6\u5728\u540c\u4e00\u65f6\u523b\u53d1\u751f\uff1b\u800c\u5e76\u53d1\u662f\u6307\u4e24\u4e2a\u6216\u591a\u4e2a\u4e8b\u4ef6\u5728\u540c\u4e00\u65f6\u95f4\u95f4\u9694 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[136],"tags":[88],"class_list":["post-51","post","type-post","status-publish","format-standard","hentry","category-notes-misc","tag-88"],"_links":{"self":[{"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/posts\/51","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=51"}],"version-history":[{"count":4,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/posts\/51\/revisions"}],"predecessor-version":[{"id":2048,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=\/wp\/v2\/posts\/51\/revisions\/2048"}],"wp:attachment":[{"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=51"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=51"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ttwow.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=51"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}