{"id":229,"date":"2024-01-20T21:04:48","date_gmt":"2024-01-20T13:04:48","guid":{"rendered":"https:\/\/forelink.top\/?p=229"},"modified":"2024-01-20T21:04:49","modified_gmt":"2024-01-20T13:04:49","slug":"java%ef%bc%88%e5%a4%9a%e6%80%81%ef%bc%89","status":"publish","type":"post","link":"https:\/\/forelink.top\/index.php\/2024\/01\/20\/java%ef%bc%88%e5%a4%9a%e6%80%81%ef%bc%89\/","title":{"rendered":"Java\uff08\u591a\u6001\uff09"},"content":{"rendered":"\n<p>Java\u591a\u6001\u7684\u597d\u5904\uff1a\u4f7f\u7528\u591a\u6001\u53ef\u4ee5\u89e3\u8026\u5408\uff0c\u6269\u5c55\u6027\u66f4\u5f3a\u3002\u4e14\u4f7f\u7528\u7236\u7c7b\u7c7b\u578b\u7684\u53d8\u91cf\u4f5c\u4e3a\u5f62\u53c2\uff0c\u53ef\u4ee5\u63a5\u53d7\u4e00\u5207\u5b50\u7c7b\u5bf9\u8c61<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>student a = new student();\ngo(a);\nteacher b = new teacher();\ngo(b);\npublic static void go(people c){}<\/code><\/pre>\n\n\n\n<p>people p1 = new teacher()<br>\u95ee\u9898\u662f\u591a\u6001\u4e0d\u80fd\u8c03\u7528\u5b50\u7c7b\u72ec\u6709\u529f\u80fd\uff0c\u9700\u8981\u8fdb\u884c\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362 : <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>student s1 = \uff08student\uff09p1<\/code><\/pre>\n\n\n\n<p>\u4f46\u8fd0\u884c\u65f6\u53ef\u80fd\u51fa\u73b0\u5f02\u5e38\uff0c\u7236\u7c7b\u5bf9\u8c61\u4e0d\u80fd\u8f6c\u4e3a\u5b50\u7c7b\u5bf9\u8c61\uff08ClassCastException\uff09\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528instanceof\u5173\u952e\u5b57,\u5224\u65ad\u5f53\u524d\u5bf9\u8c61\uff0c\u662f\u7684\u8bdd\u8fd4\u56detrue<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>p1 instanceof student\n\/\/\u5c5e\u4e8e\u7684\u8bdd\u8fd4\u56detrue\n\/\/\u4e0d\u5c5e\u4e8e\u7684\u8bdd\u8fd4\u56defalse<\/code><\/pre>\n\n\n\n<p>\u9700\u8981\u8c03\u7528\u5b50\u7c7b\u72ec\u6709\u529f\u80fd\u65f6\uff0c\u5728\u7c7b\u578b\u8f6c\u6362\u524d\u9700\u8981\u7528instanceof\u5173\u952e\u5b57\u5224\u65ad\u7c7b\u578b\uff0c\u5206\u522b\u5904\u7406\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public static void go(people c){\n     if(c instanceof student){\n         student a1 = (student)c;\n         a1.test();\n     }\n     else{\n         teacher b1 = (teacher)c;\n         b1.teach();\n     }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Java\u591a\u6001\u7684\u597d\u5904\uff1a\u4f7f\u7528\u591a\u6001\u53ef\u4ee5\u89e3\u8026\u5408\uff0c\u6269\u5c55\u6027\u66f4\u5f3a\u3002\u4e14\u4f7f\u7528\u7236\u7c7b\u7c7b\u578b\u7684\u53d8\u91cf\u4f5c\u4e3a\u5f62\u53c2\uff0c\u53ef\u4ee5\u63a5\u53d7\u4e00\u5207\u5b50\u7c7b\u5bf9\u8c61 peo [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[21],"tags":[],"class_list":["post-229","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/229","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/comments?post=229"}],"version-history":[{"count":1,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/229\/revisions"}],"predecessor-version":[{"id":231,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/229\/revisions\/231"}],"wp:attachment":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/media?parent=229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/categories?post=229"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/tags?post=229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}