{"id":202760,"date":"2025-05-22T08:51:10","date_gmt":"2025-05-22T00:51:10","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202760\/"},"modified":"2025-05-22T08:51:10","modified_gmt":"2025-05-22T00:51:10","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-java-%e4%b8%ad%e5%88%9b%e5%bb%ba%e8%87%aa%e5%ae%9a%e4%b9%89%e5%bc%82%e5%b8%b8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202760\/","title":{"rendered":"\u5982\u4f55\u5728 Java \u4e2d\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\uff1f<\/h1>\n

IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300a\u5982\u4f55\u5728 Java \u4e2d\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\uff1f\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n

\u5728 Java \u4e2d\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\uff1a\u6269\u5c55 Exception \u6216 RuntimeException \u7c7b\u3002\u4f7f\u7528 throw \u5173\u952e\u5b57\u629b\u51fa\u81ea\u5b9a\u4e49\u5f02\u5e38\u3002\u4f7f\u7528 try-catch \u5757\u6355\u83b7\u548c\u5904\u7406\u81ea\u5b9a\u4e49\u5f02\u5e38\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\uff1f<\/strong><\/p>\n

\u81ea\u5b9a\u4e49\u5f02\u5e38\u7c7b\u5141\u8bb8\u60a8\u521b\u5efa\u81ea\u5df1\u7684\u5f02\u5e38\u7c7b\u578b\uff0c\u4ee5\u5904\u7406\u7279\u5b9a\u4e8e\u60a8\u5e94\u7528\u7a0b\u5e8f\u7684\u7279\u5b9a\u9519\u8bef\u60c5\u51b5\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u60a8\u53ef\u4ee5\u521b\u5efa\u4f20\u9012\u66f4\u5177\u4f53\u9519\u8bef\u6d88\u606f\u5e76\u66f4\u8f7b\u677e\u8fdb\u884c\u6545\u969c\u6392\u9664\u7684\u5f02\u5e38\u3002<\/p>\n

\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38<\/strong><\/p>\n

\u8981\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\uff0c\u9700\u8981\u6269\u5c55 Java \u7684 Exception<\/code> \u6216 RuntimeException<\/code> \u7c7b\u3002\u5982\u679c\u60a8\u5e0c\u671b\u60a8\u7684\u5f02\u5e38\u53ef\u4ee5\u88ab\u6355\u83b7\u5e76\u5728\u7a0d\u540e\u5904\u7406\uff0c\u8bf7\u6269\u5c55 Exception<\/code>\u3002\u5bf9\u4e8e\u5728\u4ee3\u7801\u4e2d\u4e0d\u5e94\u6355\u83b7\u6216\u5904\u7406\u7684\u9519\u8bef\uff0c\u8bf7\u6269\u5c55 RuntimeException<\/code>\u3002<\/p>\n

public class MyCustomException extends Exception {\n\n    \/\/ \u6784\u9020\u5668\u548c\u65b9\u6cd5\n}<\/pre>\n
\u629b\u51fa\u81ea\u5b9a\u4e49\u5f02\u5e38<\/strong><\/p>\n
\u4f7f\u7528 throw<\/code> \u5173\u952e\u5b57\u629b\u51fa\u81ea\u5b9a\u4e49\u5f02\u5e38\uff0c\u5c31\u50cf\u4f7f\u7528\u5176\u4ed6\u5f02\u5e38\u4e00\u6837\u3002<\/p>\n
if (condition) {\n    throw new MyCustomException(\"\u81ea\u5b9a\u4e49\u5f02\u5e38\u6d88\u606f\");\n}<\/pre>\n
\u4f7f\u7528\u81ea\u5b9a\u4e49\u5f02\u5e38<\/strong><\/p>\n
\u53ef\u4ee5\u4f7f\u7528 try-catch<\/code> \u5757\u6355\u83b7\u5e76\u5904\u7406\u81ea\u5b9a\u4e49\u5f02\u5e38\uff0c\u5c31\u50cf\u4f7f\u7528\u5176\u4ed6\u5f02\u5e38\u4e00\u6837\u3002<\/p>\n
try {\n    \/\/ \u53ef\u629b\u51fa MyCustomException \u7684\u4ee3\u7801\n} catch (MyCustomException e) {\n    \/\/ \u5904\u7406\u5f02\u5e38\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u5047\u8bbe\u60a8\u6709\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684 Person \u7c7b\uff0c\u5176\u4e2d\u5305\u542b\u5e74\u9f84\u5b57\u6bb5\u3002\u8981\u521b\u5efa\u4e00\u4e2a\u81ea\u5b9a\u4e49\u5f02\u5e38\u6765\u5904\u7406\u65e0\u6548\u5e74\u9f84\uff0c\u8bf7\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n
public class InvalidAgeException extends Exception {\n\n    \/\/ \u6784\u9020\u5668\u548c\u65b9\u6cd5\n}\n\npublic class Person {\n\n    private int age;\n\n    public Person(int age) throws InvalidAgeException {\n        if (age < 0) {\n            throw new InvalidAgeException(\"\u5e74\u9f84\u4e0d\u80fd\u4e3a\u8d1f\u6570\");\n        }\n        this.age = age;\n    }\n}\n\npublic class Main {\n\n    public static void main(String[] args) {\n        try {\n            Person person = new Person(-1);\n        } catch (InvalidAgeException e) {\n            System.out.println(e.getMessage());\n        }\n    }\n}<\/pre>\n
\u5f53\u8fd0\u884c\u8fd9\u4e2a\u4f8b\u5b50\u65f6\uff0c\u5b83\u4f1a\u6253\u5370\u51fa\u4ee5\u4e0b\u9519\u8bef\u6d88\u606f\uff1a<\/p>\n
\u5e74\u9f84\u4e0d\u80fd\u4e3a\u8d1f\u6570<\/pre>\n
\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u5982\u4f55\u5728 Java \u4e2d\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u5728 Java \u4e2d\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02...<\/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-202760","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202760","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=202760"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202760\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}