{"id":202667,"date":"2025-05-22T08:24:20","date_gmt":"2025-05-22T00:24:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202667\/"},"modified":"2025-05-22T08:24:20","modified_gmt":"2025-05-22T00:24:20","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-java-%e4%b8%ad%e4%bd%bf%e7%94%a8-assert-%e8%af%ad%e5%8f%a5%e6%a3%80%e6%9f%a5%e5%bc%82%e5%b8%b8%e6%9d%a1%e4%bb%b6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202667\/","title":{"rendered":"\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528 assert \u8bed\u53e5\u68c0\u67e5\u5f02\u5e38\u6761\u4ef6\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528 assert \u8bed\u53e5\u68c0\u67e5\u5f02\u5e38\u6761\u4ef6\uff1f<\/h1>\n<p><span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528 assert \u8bed\u53e5\u68c0\u67e5\u5f02\u5e38\u6761\u4ef6\uff1f\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01<\/p>\n<p>Java \u4e2d\u7684 assert \u8bed\u53e5\u7528\u4e8e\u68c0\u67e5\u5f02\u5e38\u6761\u4ef6\uff0c\u82e5\u8868\u8fbe\u5f0f\u4e3a false\uff0c\u4f1a\u629b\u51fa AssertionError \u5f02\u5e38\u3002\u5b9e\u9645\u5e94\u7528\u5305\u62ec\u9a8c\u8bc1\u6570\u7ec4\u957f\u5ea6\u662f\u5426\u8d85\u8fc7\u6307\u5b9a\u503c\u7b49\u3002assert \u8bed\u53e5\u9ed8\u8ba4\u5904\u4e8e\u7981\u7528\u72b6\u6001\uff0c\u9700\u4f7f\u7528 -ea \u6807\u5fd7\u542f\u7528\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729929573671ca1659ef9e.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 Java \u4e2d\u7684 assert \u8bed\u53e5\u68c0\u67e5\u5f02\u5e38\u6761\u4ef6<\/strong><\/p>\n<p><strong>\u4ecb\u7ecd<\/strong><\/p>\n<p><code>assert<\/code> \u8bed\u53e5\u5728 Java \u4e2d\u7528\u4e8e\u68c0\u67e5\u5f02\u5e38\u6761\u4ef6\uff0c\u5982\u679c\u8868\u8fbe\u5f0f\u4e3a false\uff0c\u5219\u629b\u51fa <code>AssertionError<\/code> \u5f02\u5e38\u3002\u8fd9\u610f\u5473\u7740\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 <code>assert<\/code> \u6765\u9a8c\u8bc1\u7a0b\u5e8f\u662f\u5426\u6309\u7167\u6211\u4eec\u9884\u671f\u7684\u65b9\u5f0f\u8fd0\u884c\u3002<\/p>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<pre>assert expression;<\/pre>\n<p>\u5176\u4e2d <code>expression<\/code> \u662f\u4e00\u4e2a\u5e03\u5c14\u8868\u8fbe\u5f0f\u3002\u5982\u679c <code>expression<\/code> \u4e3a true\uff0c\u5219 <code>assert<\/code> \u8bed\u53e5\u6267\u884c\u4e14\u4e0d\u4f1a\u629b\u51fa\u5f02\u5e38\u3002\u5982\u679c <code>expression<\/code> \u4e3a false\uff0c\u5219 <code>assert<\/code> \u8bed\u53e5\u629b\u51fa <code>AssertionError<\/code> \u5f02\u5e38\u3002<\/p>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u68c0\u67e5\u6570\u7ec4\u957f\u5ea6\u662f\u5426\u8d85\u8fc7 10 \u7684\u5b9e\u6218\u6848\u4f8b\uff1a<\/p>\n<pre>public class AssertDemo {\n\n    public static void main(String[] args) {\n        int[] arr = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};\n\n        \/\/ \u68c0\u67e5 arr \u7684\u957f\u5ea6\u662f\u5426\u8d85\u8fc7 10\n        assert arr.length &lt;= 10 : \"\u6570\u7ec4\u957f\u5ea6\u8d85\u8fc7 10\";\n\n        System.out.println(\"\u6570\u7ec4\u957f\u5ea6\u7b26\u5408\u8981\u6c42\");\n    }\n}<\/pre>\n<p>\u5982\u679c <code>arr<\/code> \u7684\u957f\u5ea6\u8d85\u8fc7 10\uff0c\u5219 <code>assert<\/code> \u8bed\u53e5\u629b\u51fa <code>AssertionError<\/code> \u5f02\u5e38\u5e76\u6253\u5370\u9519\u8bef\u6d88\u606f\u3002\u5426\u5219\uff0c\u4ee3\u7801\u7ee7\u7eed\u6267\u884c\u5e76\u6253\u5370\u6210\u529f\u6d88\u606f\u3002<\/p>\n<p><strong>\u6ce8\u610f<\/strong><\/p>\n<p><code>assert<\/code> \u8bed\u53e5\u5728\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u5904\u4e8e\u7981\u7528\u72b6\u6001\u3002\u8981\u542f\u7528\u5b83\u4eec\uff0c\u6211\u4eec\u53ef\u4ee5\u5728 Java \u547d\u4ee4\u884c\u4e2d\u4f7f\u7528 <code>-ea<\/code> \u6807\u5fd7\u3002<\/p>\n<pre>java -ea AssertDemo<\/pre>\n<p><strong>\u5176\u4ed6\u4fe1\u606f<\/strong><\/p>\n<ul>\n<li><code>assert<\/code> \u8bed\u53e5\u53ea\u80fd\u51fa\u73b0\u5728\u65b9\u6cd5\u4e2d\uff0c\u4e0d\u80fd\u51fa\u73b0\u5728\u7c7b\u4e2d\u3002<\/li>\n<li>\u5982\u679c <code>assert<\/code> \u8bed\u53e5\u629b\u51fa\u5f02\u5e38\uff0c\u5219\u5b83\u4e0d\u4fdd\u8bc1\u4ee3\u7801\u505c\u6b62\u6267\u884c\u3002<\/li>\n<li>\u53ef\u4ee5\u5728 <code>assert<\/code> \u8bed\u53e5\u4e2d\u4f7f\u7528\u53ef\u9009\u7684\u6d88\u606f\uff0c\u4ee5\u63d0\u4f9b\u6709\u5173\u5f02\u5e38\u7684\u66f4\u591a\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528 assert \u8bed\u53e5\u68c0\u67e5\u5f02\u5e38\u6761\u4ef6\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528 ass&#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-202667","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202667","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=202667"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202667\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202667"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}