{"id":203933,"date":"2025-05-22T10:00:12","date_gmt":"2025-05-22T02:00:12","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203933\/"},"modified":"2025-05-22T10:00:12","modified_gmt":"2025-05-22T02:00:12","slug":"java-%e8%bf%90%e7%ae%97%e7%ac%a6%e4%bc%98%e5%85%88%e7%ba%a7%ef%bc%9a%e4%b8%ba%e4%bb%80%e4%b9%88%e8%a1%a8%e8%be%be%e5%bc%8f-a-a-b-%e4%b8%ad%e7%9a%84%e8%b5%8b%e5%80%bc%e6%93%8d%e4%bd%9c%e4%bc%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203933\/","title":{"rendered":"Java \u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\uff1a\u4e3a\u4ec0\u4e48\u8868\u8fbe\u5f0f a == (a = b) \u4e2d\u7684\u8d4b\u503c\u64cd\u4f5c\u4f1a\u5148\u4e8e\u6bd4\u8f83\u64cd\u4f5c\u6267\u884c\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java \u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\uff1a\u4e3a\u4ec0\u4e48\u8868\u8fbe\u5f0f a == (a = b) \u4e2d\u7684\u8d4b\u503c\u64cd\u4f5c\u4f1a\u5148\u4e8e\u6bd4\u8f83\u64cd\u4f5c\u6267\u884c\uff1f<\/h1>\n<p>\u5728IT\u884c\u4e1a\u8fd9\u4e2a\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u5f88\u5feb\u7684\u884c\u4e1a\uff0c\u53ea\u6709\u4e0d\u505c\u6b62\u7684\u5b66\u4e60\uff0c\u624d\u4e0d\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u5982\u679c\u4f60\u662f\u6587\u7ae0\u5b66\u4e60\u8005\uff0c\u90a3\u4e48\u672c\u6587\u300aJava \u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\uff1a\u4e3a\u4ec0\u4e48\u8868\u8fbe\u5f0f a == (a = b) \u4e2d\u7684\u8d4b\u503c\u64cd\u4f5c\u4f1a\u5148\u4e8e\u6bd4\u8f83\u64cd\u4f5c\u6267\u884c\uff1f\u300b\u5c31\u5f88\u9002\u5408\u4f60\uff01\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5305\u62ec##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241201\/1733025809674be011bdfe5.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>java \u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7<\/strong><\/p>\n<p><strong>\u95ee\u9898\uff1a<\/strong><\/p>\n<p>\u8868\u8fbe\u5f0f a == (a = b) \u4e2d\u4e3a\u4f55\u8d4b\u503c\u64cd\u4f5c\u5728\u5224\u65ad\u64cd\u4f5c\u4e4b\u524d\u6267\u884c\uff0c\u800c\u4e0d\u662f\u5982 () \u62ec\u53f7\u4f18\u5148\u7ea7\u6700\u9ad8\u6240\u9884\u671f\u7684\u90a3\u6837\uff1f<\/p>\n<p><strong>\u56de\u7b54\uff1a<\/strong><\/p>\n<p>\u867d\u7136 () \u62ec\u53f7\u5728 java \u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\u4e2d\u4f18\u5148\u7ea7\u6700\u9ad8\uff0c\u4f46\u8fd9\u5e76\u4e0d\u662f\u5fc5\u7136\u610f\u5473\u7740\u62ec\u53f7\u5185\u7684\u6240\u6709\u64cd\u4f5c\u90fd\u4f1a\u5148\u6267\u884c\u3002<\/p>\n<p>\u5728 a == (a = b) \u8868\u8fbe\u5f0f\u4e2d\uff0c\u8d4b\u503c\u64cd\u4f5c a = b \u5b9e\u9645\u4e0a\u5206\u4e3a\u4e24\u4e2a\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\u5148\u5c06 b \u503c\u4fdd\u5b58\u5728\u4e34\u65f6\u53d8\u91cf\u4e2d\u3002<\/li>\n<li>\u5c06\u4e34\u65f6\u53d8\u91cf\u7684\u503c\u5206\u914d\u7ed9 a \u53d8\u91cf\u3002<\/li>\n<\/ol>\n<p>\u56e0\u6b64\uff0c\u5728\u6267\u884c a == (a = b) \u8868\u8fbe\u5f0f\u65f6\uff0c\u5b9e\u9645\u4e0a\u9996\u5148\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<pre>tmp_var = b  \/\/ b \u7684\u503c\u4e3a 3\uff0c\u5982 a = b \u4e3a 3<\/pre>\n<p>\u7136\u540e\u6267\u884c\u62ec\u53f7\u5185\u7684\u62ec\u53f7\u8868\u8fbe\u5f0f a == tmp_var\uff0c\u6700\u540e\u8fdb\u884c\u6bd4\u8f83\uff1a<\/p>\n<pre>a == tmp_var  \/\/ a \u4e3a 1\uff0c\u6bd4\u8f83\u7ed3\u679c\u4e3a false<\/pre>\n<p>\u56e0\u6b64\uff0c\u6b63\u786e\u7684\u6267\u884c\u987a\u5e8f\u662f\uff1a<\/p>\n<ol>\n<li>\u5c06 b \u503c\u4fdd\u5b58\u5728\u4e34\u65f6\u53d8\u91cf\u4e2d\u3002<\/li>\n<li>\u6bd4\u8f83 a \u548c\u4e34\u65f6\u53d8\u91cf\u7684\u503c\u3002<\/li>\n<li>\u6267\u884c\u8d4b\u503c\u64cd\u4f5c\uff0c\u5c06\u4e34\u65f6\u53d8\u91cf\u7684\u503c\u8d4b\u503c\u7ed9 a\u3002<\/li>\n<\/ol>\n<p>\u672c\u7bc7\u5173\u4e8e\u300aJava \u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\uff1a\u4e3a\u4ec0\u4e48\u8868\u8fbe\u5f0f a == (a = b) \u4e2d\u7684\u8d4b\u503c\u64cd\u4f5c\u4f1a\u5148\u4e8e\u6bd4\u8f83\u64cd\u4f5c\u6267\u884c\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\uff1a\u4e3a\u4ec0\u4e48\u8868&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203933","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203933","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203933"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203933\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203933"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203933"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}