{"id":1095,"date":"2021-12-13T16:41:22","date_gmt":"2021-12-13T08:41:22","guid":{"rendered":"http:\/\/refusea.com\/?p=1095"},"modified":"2021-12-13T18:08:02","modified_gmt":"2021-12-13T10:08:02","slug":"%e6%8e%92%e5%ba%8f%e6%97%b6%e9%81%87%e5%88%b0%e7%9a%84%e5%a5%87%e6%80%aa%e5%bc%82%e5%b8%b8-comparison-method-violates-its-general-contract","status":"publish","type":"post","link":"https:\/\/refusea.com\/?p=1095","title":{"rendered":"\u6392\u5e8f\u65f6\u9047\u5230\u7684\u5947\u602a\u5f02\u5e38 Comparison method violates its general contract!"},"content":{"rendered":"<h2>\u80cc\u666f<\/h2>\n<p>\u8bdd\u8bf4\u67d0\u6b21\u53d1\u5e03\u65b0\u7248\u672c\u540e\uff0c\u5728\u65e5\u5fd7\u91cc\u53d1\u73b0\u4e86\u5947\u602a\u7684\u5f02\u5e38<\/p>\n<pre><code>Comparison method violates its general contract!\njava.lang.IllegalArgumentException: Comparison method violates its general contract!\n    at java.util.ComparableTimSort.mergeLo(ComparableTimSort.java:744)\n    at java.util.ComparableTimSort.mergeAt(ComparableTimSort.java:481)\n    at java.util.ComparableTimSort.mergeForceCollapse(ComparableTimSort.java:422)\n    at java.util.ComparableTimSort.sort(ComparableTimSort.java:222)\n    at java.util.Arrays.sort(Arrays.java:1312)\n    at java.util.Arrays.sort(Arrays.java:1506)\n    at java.util.ArrayList.sort(ArrayList.java:1462)\n    at java.util.Collections.sort(Collections.java:141)<\/code><\/pre>\n<p>\u505a\u4e86\u8fd9\u4e48\u591a\u5e74\u5f00\u53d1\uff0c\u8fd8\u662f\u5934\u4e00\u6b21\u9047\u5230\u8fd9\u4e2a\u5f02\u5e38\uff0c\u8c8c\u4f3c\u662f\u6392\u5e8f\u65f6\u629b\u51fa\u6765\u7684\uff0c\u770b\u4e86\u4ee3\u7801\u4e5f\u6ca1\u6709\u4ec0\u4e48\u5934\u7eea\uff0c\u7f51\u4e0a\u641c\u7d22\u4e86\u4e00\u756a\uff0c\u53d1\u73b0\u8fd9\u4e2a\u5f02\u5e38\u9020\u6210\u4e86\u6bd4\u8f83\u5e7f\u6cdb\u7684\u8ff7\u60d1<\/p>\n<h2>\u5f02\u5e38\u539f\u56e0<\/h2>\n<p>\u6839\u636e\u641c\u7d22\u7ed3\u679c\uff0c\u6709\u4ee5\u4e0b\u51e0\u79cd\u89c2\u70b9<\/p>\n<ul>\n<li>list \u91cc\u6709 null \u5bf9\u8c61\uff0c\u8fd9\u4e2a\u88ab\u6211\u6392\u9664\u4e86\uff0cnull \u5bf9\u8c61\u662f\u629b\u51fa NPE<\/li>\n<li>\u8fdb\u884c\u6bd4\u8f83\u65f6\u672a\u8003\u8651\u76f8\u7b49\u7684\u60c5\u51b5<\/li>\n<li>\u6bd4\u8f83\u7ed3\u679c\u4e0d\u80fd\u4f20\u9012\uff0c\u6bd4\u5982\uff0c <code>a &gt; b<\/code>\uff0c <code>b &gt; c<\/code>\uff0c\u90a3\u4e48\u5e94\u8be5\u5f97\u51fa <code>a &gt; c<\/code>\uff0c\u5982\u679c\u5b9e\u9645\u6bd4\u8f83\u903b\u8f91\u4e0d\u80fd\u652f\u6301\u8fd9\u4e2a\u4f20\u9012\u6027\uff0c\u4f1a\u629b\u51fa\u8fd9\u4e2a\u5f02\u5e38<\/li>\n<li>\u76f8\u7b49\u7684\u5bf9\u8c61\uff0c\u6bd4\u8f83\u65f6\u533a\u5206\u51fa\u4e86\u5927\u5c0f\uff0c\u6bd4\u5982\uff0c<code>a.equals(b) == true<\/code>\uff0c\u6bd4\u8f83\u65f6\u53d1\u751f <code> a &gt; b<\/code> \u6216\u8005 <code>a &lt; b<\/code><\/li>\n<\/ul>\n<p>\u540e\u4e24\u79cd\u8bf4\u6cd5\u597d\u50cf\u5f88\u6709\u9053\u7406\uff0c\u6211\u5bf9\u7740\u6211\u7684 <code>compareTo<\/code> \u4ee3\u7801\u7814\u7a76\u4e86\u5f88\u4e45\uff0c\u4e5f\u6784\u9020\u4e86\u4e00\u4e9b\u6d4b\u8bd5\u7528\u4f8b\uff0c\u4f46\u7ed3\u679c\u90fd\u65e0\u6cd5\u91cd\u73b0\u8fd9\u4e2a\u5f02\u5e38<\/p>\n<h2>\u89e3\u51b3\u529e\u6cd5<\/h2>\n<p>\u6700\u540e\uff0c\u6211\u53d1\u73b0\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u95ee\u9898<\/p>\n<p>\u6211\u6392\u5e8f\u7684\u5bf9\u8c61\u662f\u4ece\u7f13\u5b58\u91cc\u53d6\u51fa\u6765\u7684\uff0c\u7136\u540e\u7ed9\u5bf9\u8c61\u7684\u67d0\u51e0\u4e2a\u5c5e\u6027\u8d4b\u503c\uff0c\u6392\u5e8f\u5219\u57fa\u4e8e\u4e0a\u4e00\u6b65\u9aa4\u8d4b\u503c\u7684\u90a3\u51e0\u4e2a\u5c5e\u6027\u3002\u5728\u591a\u7ebf\u7a0b\u7684\u60c5\u51b5\u4e0b\uff0c\u540c\u4e00\u4e2a\u5bf9\u8c61\u53ef\u80fd\u88ab\u591a\u4e2a\u7ebf\u7a0b\u5e76\u53d1\u8d4b\u503c\uff0c\u8fd9\u9020\u6210\u6392\u5e8f\u65f6\u7684\u5206\u6570\u5e76\u4e0d\u56fa\u5b9a\u3002<\/p>\n<p>\u6700\u7ec8\u7684\u89e3\u51b3\u529e\u6cd5\u5c31\u662f\u4ece\u7f13\u5b58\u91cc\u53d6\u51fa\u5bf9\u8c61\u540e\uff0c\u590d\u5236\u4e00\u4efd\u518d\u8d4b\u503c\u6392\u5e8f\uff0c\u8fd9\u6837\u5c31\u4e0d\u518d\u6709\u5f02\u5e38\u4e86<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u80cc\u666f \u8bdd\u8bf4\u67d0\u6b21\u53d1\u5e03\u65b0\u7248\u672c\u540e\uff0c\u5728\u65e5\u5fd7\u91cc\u53d1\u73b0\u4e86\u5947\u602a\u7684\u5f02\u5e38 Comparison method violates i [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[22],"class_list":["post-1095","post","type-post","status-publish","format-standard","hentry","category-java","tag-22"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u6392\u5e8f\u65f6\u9047\u5230\u7684\u5947\u602a\u5f02\u5e38 Comparison method violates its general contract! 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