{"id":264762,"date":"2024-05-15T15:48:19","date_gmt":"2024-05-15T07:48:19","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/264762.html"},"modified":"2024-05-15T15:48:27","modified_gmt":"2024-05-15T07:48:27","slug":"%e5%ad%a6-java-%e5%b8%b8%e8%a7%81%e7%9a%84%e4%bb%a3%e7%a0%81%e7%bc%96%e7%a8%8b%e9%94%99%e8%af%af%e6%9c%89%e5%93%aa%e4%ba%9b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/264762.html","title":{"rendered":"\u5b66 Java \u5e38\u89c1\u7684\u4ee3\u7801\u7f16\u7a0b\u9519\u8bef\u6709\u54ea\u4e9b"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27125357\/bca66aa8-23ca-4d29-91f2-e305732689c8.webp\" alt=\"\u5b66 Java \u5e38\u89c1\u7684\u4ee3\u7801\u7f16\u7a0b\u9519\u8bef\u6709\u54ea\u4e9b\" \/><\/p>\n<p><p>\u5b66\u4e60Java\u65f6\uff0c\u5e38\u89c1\u7684\u4ee3\u7801\u7f16\u7a0b\u9519\u8bef\u4e3b\u8981\u96c6\u4e2d\u5728<strong>\u53d8\u91cf\u547d\u540d\u4e0d\u89c4\u8303\u3001\u5ffd\u7565\u5f02\u5e38\u5904\u7406\u3001\u6ee5\u7528\u8bbe\u8ba1\u6a21\u5f0f\u3001\u5e76\u53d1\u95ee\u9898\u5904\u7406\u4e0d\u5f53\u3001\u4ee5\u53ca\u5ffd\u89c6\u5185\u5b58\u7ba1\u7406<\/strong>\u7b49\u65b9\u9762\u3002\u5176\u4e2d\uff0c<strong>\u5e76\u53d1\u95ee\u9898\u5904\u7406\u4e0d\u5f53<\/strong>\u5c24\u4e3a\u7a81\u51fa\uff0c\u56e0\u4e3aJava\u4f5c\u4e3a\u4e00\u95e8\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u670d\u52a1\u5668\u7aef\u5f00\u53d1\uff0c\u6d89\u53ca\u591a\u7ebf\u7a0b\u5904\u7406\u7684\u573a\u666f\u975e\u5e38\u666e\u904d\u3002\u5e76\u53d1\u95ee\u9898\u4e0d\u4ec5\u6d89\u53ca\u591a\u7ebf\u7a0b\u4e4b\u95f4\u7684\u6570\u636e\u4e00\u81f4\u6027\u95ee\u9898\uff0c\u8fd8\u6d89\u53ca\u5230\u7ebf\u7a0b\u7684\u6b7b\u9501\u3001\u7ade\u6001\u6761\u4ef6\u7b49\uff0c\u8fd9\u4e9b\u95ee\u9898\u7684\u5904\u7406\u4e0d\u5f53\uff0c\u4f1a\u5bfc\u81f4\u7a0b\u5e8f\u8fd0\u884c\u5f02\u5e38\u3001\u6570\u636e\u4e0d\u4e00\u81f4\u751a\u81f3\u7a0b\u5e8f\u5d29\u6e83\u3002\u6b63\u786e\u5904\u7406\u8fd9\u4e9b\u5e76\u53d1\u95ee\u9898\uff0c\u4e0d\u4ec5\u9700\u8981\u6df1\u5165\u7406\u89e3Java\u7684\u5185\u5b58\u6a21\u578b\u3001\u7ebf\u7a0b\u540c\u6b65\u673a\u5236\uff0c\u8fd8\u9700\u8981\u4e86\u89e3\u5982\u4f55\u5408\u7406\u5730\u8fd0\u7528\u5e76\u53d1\u5de5\u5177\u7c7b\uff0c\u5982<code>java.util.concurrent<\/code>\u5305\u63d0\u4f9b\u7684\u5404\u79cd\u5e76\u53d1\u5de5\u5177\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u53d8\u91cf\u547d\u540d\u4e0d\u89c4\u8303<\/h3>\n<\/p>\n<p><p>\u5728Java\u7f16\u7a0b\u4e2d\uff0c\u826f\u597d\u7684\u53d8\u91cf\u547d\u540d\u4e60\u60ef\u5bf9\u4e8e\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u81f3\u5173\u91cd\u8981\u3002\u9075\u5faaJava\u7684\u547d\u540d\u89c4\u5219\u548c\u7ea6\u5b9a\u662f\u975e\u5e38\u5fc5\u8981\u7684\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u4e0d\u89c4\u8303\u7684\u547d\u540d<\/strong>\u4f1a\u5bfc\u81f4\u4ee3\u7801\u96be\u4ee5\u7406\u89e3\u548c\u7ef4\u62a4\uff0c\u8b6c\u5982\u4f7f\u7528\u62fc\u97f3\u3001\u5355\u4e2a\u5b57\u6bcd\uff08\u9664\u4e86\u5728\u5faa\u73af\u4e2d\u4f5c\u4e3a\u7d22\u5f15\u4f7f\u7528\u5916\uff09\u6216\u8005\u4e0d\u5177\u6709\u63cf\u8ff0\u6027\u7684\u547d\u540d\uff0c\u90fd\u662f\u5e94\u5f53\u907f\u514d\u7684\u3002<\/li>\n<li>\u5408\u89c4\u7684\u547d\u540d\u5e94\u5f53\u7b80\u660e\u627c\u8981\u4e14\u80fd\u591f\u53cd\u6620\u53d8\u91cf\u7684\u7528\u9014\u548c\u542b\u4e49\uff0c\u5982\u4f7f\u7528\u9a7c\u5cf0\u5f0f\u547d\u540d\u6cd5\uff0c\u5e76\u907f\u514d\u4f7f\u7528Java\u4fdd\u7559\u5173\u952e\u5b57\u3002<\/li>\n<\/ul>\n<p><h3>\u4e8c\u3001\u5ffd\u7565\u5f02\u5e38\u5904\u7406<\/h3>\n<\/p>\n<p><p>Java\u7684\u5f02\u5e38\u5904\u7406\u662f\u5176\u8bed\u8a00\u7279\u6027\u4e4b\u4e00\uff0c\u6b63\u786e\u5904\u7406\u5f02\u5e38\u5bf9\u4e8e\u6784\u5efa\u7a33\u5065\u7684\u5e94\u7528\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u5f02\u5e38\u5904\u7406\u4e0d\u5f53<\/strong>\uff0c\u5982\u4f7f\u7528\u7a7a\u7684catch\u5757\u6216\u4ec5\u4ec5\u6253\u5370\u5f02\u5e38\u4fe1\u606f\u800c\u4e0d\u8fdb\u884c\u4efb\u4f55\u5904\u7406\uff0c\u8fd9\u4f1a\u4f7f\u7a0b\u5e8f\u5728\u9047\u5230\u9519\u8bef\u65f6\u7ee7\u7eed\u6267\u884c\uff0c\u53ef\u80fd\u5f15\u53d1\u66f4\u4e25\u91cd\u7684\u9519\u8bef\u6216\u903b\u8f91\u6df7\u4e71\u3002<\/li>\n<li>\u5e94\u5f53\u9488\u5bf9\u53ef\u80fd\u51fa\u73b0\u7684\u5f02\u5e38\u60c5\u51b5\uff0c\u63d0\u4f9b\u5408\u7406\u7684\u5904\u7406\u903b\u8f91\uff0c\u5982\u8d44\u6e90\u6e05\u7406\u3001\u4e8b\u52a1\u56de\u6eda\u7b49\uff0c\u5e76\u5728\u9002\u5f53\u7684\u5c42\u6b21\u5904\u7406\u6216\u629b\u51fa\u5f02\u5e38\u3002<\/li>\n<\/ul>\n<p><h3>\u4e09\u3001\u6ee5\u7528\u8bbe\u8ba1\u6a21\u5f0f<\/h3>\n<\/p>\n<p><p>\u8bbe\u8ba1\u6a21\u5f0f\u662f\u89e3\u51b3\u5e38\u89c1\u95ee\u9898\u7684\u6210\u719f\u6a21\u677f\uff0c\u4f46\u4e0d\u6070\u5f53\u7684\u4f7f\u7528\u4f1a\u5e26\u6765\u526f\u4f5c\u7528\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u6ee5\u7528\u8bbe\u8ba1\u6a21\u5f0f<\/strong>\u4f1a\u589e\u52a0\u4ee3\u7801\u590d\u6742\u5ea6\u548c\u7ef4\u62a4\u96be\u5ea6\uff0c\u6bd4\u5982\u5728\u4e0d\u9700\u8981\u7684\u573a\u5408\u4f7f\u7528\u5355\u4f8b\uff08Singleton\uff09\u6a21\u5f0f\uff0c\u5c31\u53ef\u80fd\u5bfc\u81f4\u5bf9\u8c61\u5171\u4eab\u5bfc\u81f4\u7684\u5e76\u53d1\u95ee\u9898\u3002<\/li>\n<li>\u5e94\u5f53\u6839\u636e\u5b9e\u9645\u9700\u6c42\u5408\u7406\u9009\u62e9\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u907f\u514d\u8fc7\u5ea6\u8bbe\u8ba1\uff0c\u786e\u4fdd\u4ee3\u7801\u6e05\u6670\u548c\u9ad8\u6548\u3002<\/li>\n<\/ul>\n<p><h3>\u56db\u3001\u5e76\u53d1\u95ee\u9898\u5904\u7406\u4e0d\u5f53<\/h3>\n<\/p>\n<p><p>\u5728\u591a\u7ebf\u7a0b\u548c\u5e76\u53d1\u7f16\u7a0b\u65b9\u9762\u7684\u9519\u8bef\u662fJava\u7f16\u7a0b\u4e2d\u6700\u4e3a\u5e38\u89c1\u4e5f\u662f\u6700\u96be\u4ee5\u6392\u67e5\u7684\u95ee\u9898\u4e4b\u4e00\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u5904\u7406\u5e76\u53d1\u95ee\u9898\u4e0d\u5f53<\/strong>\uff0c\u5982\u672a\u6b63\u786e\u540c\u6b65\u3001\u9501\u7684\u4f7f\u7528\u4e0d\u5f53\u6216\u5ffd\u7565\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\uff0c\u90fd\u4f1a\u5bfc\u81f4\u6570\u636e\u4e0d\u4e00\u81f4\u3001\u6b7b\u9501\u6216\u6027\u80fd\u74f6\u9888\u3002<\/li>\n<li>\u4e86\u89e3Java\u5185\u5b58\u6a21\u578b\u3001\u5408\u7406\u4f7f\u7528synchronized\u3001Lock\u3001ConcurrentHashMap\u7b49\u5e76\u53d1\u5de5\u5177\uff0c\u4ee5\u53ca\u9075\u5faa\u6700\u4f73\u5b9e\u8df5\uff0c\u662f\u4fdd\u8bc1\u5e76\u53d1\u5b89\u5168\u7684\u5173\u952e\u3002<\/li>\n<\/ul>\n<p><h3>\u4e94\u3001\u5ffd\u89c6\u5185\u5b58\u7ba1\u7406<\/h3>\n<\/p>\n<p><p>\u867d\u7136Java\u6709\u81ea\u52a8\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u4f46\u4e0d\u6b63\u786e\u7684\u8d44\u6e90\u548c\u5185\u5b58\u7ba1\u7406\u4ecd\u7136\u4f1a\u5bfc\u81f4\u95ee\u9898\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u5185\u5b58\u6cc4\u9732<\/strong>\u662f\u8f83\u4e3a\u5e38\u89c1\u7684\u95ee\u9898\uff0c\u4f8b\u5982\u957f\u751f\u547d\u5468\u671f\u7684\u5bf9\u8c61\u6301\u6709\u77ed\u751f\u547d\u5468\u671f\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u5c31\u53ef\u80fd\u5bfc\u81f4\u672c\u53ef\u56de\u6536\u7684\u5185\u5b58\u5f97\u4e0d\u5230\u91ca\u653e\u3002<\/li>\n<li>\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1\u5e94\u5f53\u8c28\u614e\uff0c\u9700\u8981\u6ce8\u610f\u8d44\u6e90\u6e05\u7406\u548c\u5173\u95ed\uff0c\u907f\u514d\u5185\u5b58\u6cc4\u9732\u548c\u8d44\u6e90\u5360\u7528\u3002<\/li>\n<\/ul>\n<p><p>\u901a\u5e38\uff0c\u907f\u514d\u8fd9\u4e9b\u5e38\u89c1\u7684\u9519\u8bef\u9700\u8981\u5f00\u53d1\u8005\u5177\u5907\u826f\u597d\u7684\u7f16\u7a0b\u4e60\u60ef\u548c\u6df1\u5165\u7406\u89e3Java\u8bed\u8a00\u7684\u7279\u6027\uff0c\u540c\u65f6\u901a\u8fc7\u4e0d\u65ad\u5b9e\u8df5\u3001<a href=\"https:\/\/docs.pingcode.com\/code-review\" target=\"_blank\">\u4ee3\u7801\u5ba1\u67e5<\/a>\u548c\u5b66\u4e60\uff0c\u6301\u7eed\u63d0\u9ad8\u4ee3\u7801\u8d28\u91cf\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>\u4e3a\u4ec0\u4e48\u6211\u7684Java\u4ee3\u7801\u8fd0\u884c\u4e0d\u8d77\u6765\uff1f<\/strong><br \/>Java\u4ee3\u7801\u8fd0\u884c\u4e0d\u8d77\u6765\u7684\u5e38\u89c1\u539f\u56e0\u5305\u62ec\u8bed\u6cd5\u9519\u8bef\u3001\u903b\u8f91\u9519\u8bef\u3001\u7f3a\u5c11\u5fc5\u8981\u7684\u4f9d\u8d56\u5e93\u7b49\u3002\u5728\u7f16\u5199Java\u4ee3\u7801\u65f6\uff0c\u52a1\u5fc5\u68c0\u67e5\u8bed\u6cd5\u3001\u53d8\u91cf\u547d\u540d\u662f\u5426\u6b63\u786e\uff0c\u4ee5\u53ca\u65b9\u6cd5\u7684\u8c03\u7528\u4e0e\u4f20\u53c2\u662f\u5426\u6b63\u786e\u3002\u540c\u65f6\uff0c\u786e\u4fdd\u6240\u4f7f\u7528\u7684\u5e93\u5df2\u6b63\u786e\u5f15\u5165\u5e76\u4e14\u7248\u672c\u4e0e\u4ee3\u7801\u8981\u6c42\u5339\u914d\u3002<\/p>\n<p><strong>\u6211\u7684Java\u7a0b\u5e8f\u4e3a\u4ec0\u4e48\u62a5\u9519\uff1aNullPointerException\uff1f<\/strong><br \/>NullPointerException\u662fJava\u7f16\u7a0b\u4e2d\u5e38\u89c1\u7684\u9519\u8bef\u4e4b\u4e00\uff0c\u5b83\u8868\u793a\u4f7f\u7528\u4e86\u4e00\u4e2a\u7a7a\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u901a\u5e38\u51fa\u73b0NullPointerException\u7684\u539f\u56e0\u662f\u6ca1\u6709\u6b63\u786e\u521d\u59cb\u5316\u5bf9\u8c61\uff0c\u6216\u8005\u5728\u4f7f\u7528\u5bf9\u8c61\u4e4b\u524d\u6ca1\u6709\u8fdb\u884c\u7a7a\u503c\u68c0\u67e5\u3002\u8981\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u9700\u8981\u4ed4\u7ec6\u68c0\u67e5\u4ee3\u7801\u4e2d\u7684\u5bf9\u8c61\u521d\u59cb\u5316\u8fc7\u7a0b\uff0c\u5e76\u786e\u4fdd\u5728\u4f7f\u7528\u5bf9\u8c61\u4e4b\u524d\u8fdb\u884c\u7a7a\u503c\u5224\u65ad\u3002<\/p>\n<p><strong>\u6211\u8be5\u5982\u4f55\u907f\u514d\u5e38\u89c1\u7684Java\u7f16\u7a0b\u9519\u8bef\uff1f<\/strong><br \/>\u907f\u514d\u5e38\u89c1\u7684Java\u7f16\u7a0b\u9519\u8bef\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u5728\u7f16\u5199\u4ee3\u7801\u4e4b\u524d\uff0c\u5148\u4ed4\u7ec6\u7406\u89e3\u95ee\u9898\u9700\u6c42\uff0c\u5e76\u8bbe\u8ba1\u5408\u7406\u7684\u7a0b\u5e8f\u7ed3\u6784\uff1b\u5728\u7f16\u5199\u4ee3\u7801\u65f6\uff0c\u9075\u5faa\u826f\u597d\u7684\u7f16\u7801\u89c4\u8303\uff0c\u5982\u89c4\u8303\u7684\u547d\u540d\u3001\u5408\u9002\u7684\u6ce8\u91ca\u7b49\uff1b\u5728\u6d4b\u8bd5\u4ee3\u7801\u65f6\uff0c\u5145\u5206\u8003\u8651\u5404\u79cd\u8fb9\u754c\u60c5\u51b5\uff0c\u786e\u4fdd\u4ee3\u7801\u7684\u5065\u58ee\u6027\u3002\u6b64\u5916\uff0c\u79ef\u7d2f\u7ecf\u9a8c\u548c\u9605\u8bfb\u4f18\u79c0\u7684\u4ee3\u7801\u4e5f\u5bf9\u907f\u514d\u9519\u8bef\u5177\u6709\u5e2e\u52a9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5b66\u4e60Java\u65f6\uff0c\u5e38\u89c1\u7684\u4ee3\u7801\u7f16\u7a0b\u9519\u8bef\u4e3b\u8981\u96c6\u4e2d\u5728\u53d8\u91cf\u547d\u540d\u4e0d\u89c4\u8303\u3001\u5ffd\u7565\u5f02\u5e38\u5904\u7406\u3001\u6ee5\u7528\u8bbe\u8ba1\u6a21\u5f0f\u3001\u5e76\u53d1\u95ee\u9898\u5904\u7406\u4e0d\u5f53\u3001\u4ee5\u53ca [&hellip;]","protected":false},"author":3,"featured_media":264774,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/264762"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=264762"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/264762\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/264774"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=264762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=264762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=264762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}