{"id":64831,"date":"2025-05-03T13:53:08","date_gmt":"2025-05-03T05:53:08","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64831\/"},"modified":"2025-05-03T13:53:08","modified_gmt":"2025-05-03T05:53:08","slug":"java-%e4%b8%ad%e7%9a%84%e5%8a%a8%e6%80%81%e7%bb%91%e5%ae%9a%ef%bc%9a%e4%b8%ba%e4%bb%80%e4%b9%88%e5%ad%90%e7%b1%bb%e6%96%b9%e6%b3%95%e6%9c%89%e6%97%b6%e6%97%a0%e6%b3%95%e8%a2%ab%e8%b0%83%e7%94%a8-3","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64831\/","title":{"rendered":"Java \u4e2d\u7684\u52a8\u6001\u7ed1\u5b9a\uff1a\u4e3a\u4ec0\u4e48\u5b50\u7c7b\u65b9\u6cd5\u6709\u65f6\u65e0\u6cd5\u88ab\u8c03\u7528\uff1f"},"content":{"rendered":"

\"Java<\/p>\n

java \u4e2d\u7684\u52a8\u6001\u7ed1\u5b9a<\/strong><\/p>\n

java \u4e2d\u7684\u52a8\u6001\u7ed1\u5b9a\u662f\u4e00\u79cd\u5728\u8fd0\u884c\u65f6\u6839\u636e\u5176\u5b9e\u9645\u7c7b\u578b\u9009\u62e9\u6b63\u786e\u65b9\u6cd5\u7684\u6280\u672f\u3002\u8fd9\u610f\u5473\u7740\u5bf9\u8c61\u53ef\u4ee5\u6267\u884c\u6765\u81ea\u5176\u7236\u7c7b\u548c\u5b9e\u73b0\u7684\u63a5\u53e3\u7684\u65b9\u6cd5\uff0c\u800c\u4e0d\u7ba1\u5176\u58f0\u660e\u7c7b\u578b\u3002<\/p>\n

\u793a\u4f8b 1<\/strong><\/p>\n

\u6b64\u5904\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86 a \u7c7b\u548c\u5b83\u7684\u5b50\u7c7b b\u3002\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a b \u7c7b\u7684\u5bf9\u8c61\u5e76\u5c06\u5176\u5b58\u50a8\u5728 a \u7c7b\u578b\u7684\u53d8\u91cf a \u4e2d\u3002\u5f53\u8c03\u7528 f(int) \u65b9\u6cd5\u65f6\uff0cjava \u865a\u62df\u673a\uff08jvm\uff09\u4f1a\u8bc6\u522b a \u5b9e\u9645\u5f15\u7528\u7684 b \u7c7b\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528\u5339\u914d\u5176\u5b9e\u9645\u7c7b\u578b\u7684 f(int) \u65b9\u6cd5\uff08\u201c\u6211\u662f\u5b50\u7c7b\u201d\uff09\u3002<\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

class A {\n    public void f(int a) {\n        System.out.println(\"\u6211\u662f\u7236\u7c7b\");\n    }\n}\n\nclass B extends A {\n    @Override\n    public void f(int a) {\n        System.out.println(\"\u6211\u662f\u5b50\u7c7b\");\n    }\n\n    public static void main(String[] args) {\n        A a = new B();\n        a.f(0);\n    }\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u793a\u4f8b 2<\/strong><\/p>\n
\u7136\u800c\uff0c\u5728\u7b2c\u4e8c\u4e2a\u793a\u4f8b\u4e2d\uff0cb \u7c7b\u6dfb\u52a0\u4e86\u4e00\u4e2a print(string) \u65b9\u6cd5\uff0ca \u7c7b\u6ca1\u6709\u8fd9\u4e2a\u65b9\u6cd5\u3002\u5f53\u6211\u4eec\u5c1d\u8bd5\u8c03\u7528 a.print(“0”) \u65f6\uff0cjvm \u4f1a\u5c1d\u8bd5\u5728 b \u7c7b\u4e2d\u5bfb\u627e print \u65b9\u6cd5\uff0c\u4f46\u6ca1\u6709\u627e\u5230\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cjvm \u4e0d\u4f1a\u8f6c\u5230\u7236\u7c7b a \u4e2d\u5bfb\u627e\u8be5\u65b9\u6cd5\uff0c\u56e0\u4e3a a \u88ab\u58f0\u660e\u4e3a a \u7c7b\u578b\uff0c\u5b83\u53ea\u80fd\u8bbf\u95ee a \u7c7b\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5\u3002<\/p>\n
\u6362\u53e5\u8bdd\u8bf4\uff0c\u52a8\u6001\u7ed1\u5b9a\u4ec5\u9002\u7528\u4e8e\u5bf9\u8c61\u80fd\u591f\u8bbf\u95ee\u7684\u65b9\u6cd5\uff0c\u800c\u5f15\u7528\u53d8\u91cf\u7684\u58f0\u660e\u7c7b\u578b\u51b3\u5b9a\u4e86\u5176\u53ef\u8bbf\u95ee\u7684\u65b9\u6cd5\u96c6\u3002\u5373\u4f7f a \u5b9e\u9645\u5f15\u7528\u7684\u5bf9\u8c61\u662f b \u7c7b\u7684\u5b9e\u4f8b\uff0c\u5b83\u4ecd\u7136\u53ea\u80fd\u8c03\u7528 a \u7c7b\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662fJava \u4e2d\u7684\u52a8\u6001\u7ed1\u5b9a\uff1a\u4e3a\u4ec0\u4e48\u5b50\u7c7b\u65b9\u6cd5\u6709\u65f6\u65e0\u6cd5\u88ab\u8c03\u7528\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
java \u4e2d\u7684\u52a8\u6001\u7ed1\u5b9a java \u4e2d\u7684\u52a8\u6001\u7ed1\u5b9a\u662f\u4e00\u79cd\u5728\u8fd0\u884c\u65f6\u6839\u636e\u5176\u5b9e\u9645\u7c7b\u578b\u9009\u62e9\u6b63\u786e\u65b9\u6cd5\u7684\u6280\u672f\u3002\u8fd9\u610f\u5473\u7740\u5bf9\u8c61\u53ef\u4ee5\u6267\u884c\u6765\u81ea\u5176\u7236\u7c7b\u548c\u5b9e\u73b0\u7684\u63a5\u53e3\u7684\u65b9\u6cd5\uff0c\u800c\u4e0d\u7ba1\u5176\u58f0\u660e\u7c7b\u578b\u3002 \u793a\u4f8b 1 \u6b64\u5904\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86 a \u7c7b\u548c\u5b83\u7684\u5b50\u7c7b b\u3002\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a b \u7c7b\u7684\u5bf9\u8c61\u5e76\u5c06\u5176\u5b58\u50a8\u5728 a \u7c7b\u578b\u7684\u53d8\u91cf a \u4e2d\u3002\u5f53\u8c03\u7528 f(int) \u65b9\u6cd5\u65f6\uff0cjava \u865a\u62df\u673a\uff08jvm\uff09\u4f1a\u8bc6\u522b a \u5b9e\u9645\u5f15\u7528\u7684 b \u7c7b\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528\u5339\u914d\u5176\u5b9e\u9645\u7c7b\u578b\u7684 f(int) \u65b9\u6cd5\uff08\u201c\u6211\u662f\u5b50\u7c7b\u201d\uff09\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b class A { public void f(int a) { System.out.println(“\u6211\u662f\u7236\u7c7b”); } } class B extends A { @Override public void f(int a) { System.out.println(“\u6211\u662f\u5b50\u7c7b”); } public static void main(String[] args) […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-64831","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64831","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=64831"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64831\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64831"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64831"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64831"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}