{"id":1400,"date":"2023-11-20T11:28:06","date_gmt":"2023-11-20T03:28:06","guid":{"rendered":"https:\/\/www.talktop.cn\/?p=1400"},"modified":"2024-12-27T10:38:40","modified_gmt":"2024-12-27T02:38:40","slug":"javamap%e9%81%8d%e5%8e%86%ef%bc%9a%e5%a4%9a%e7%a7%8d%e6%96%b9%e5%bc%8f%e6%b7%b1%e5%85%a5%e6%8e%a2%e7%b4%a2","status":"publish","type":"post","link":"https:\/\/www.talktop.cn\/?p=1400","title":{"rendered":"Java Map\u904d\u5386\uff1a\u591a\u79cd\u65b9\u5f0f\u6df1\u5165\u63a2\u7d22"},"content":{"rendered":"\n<p>Java\u4e2d\u7684Map\u662f\u4e00\u79cd\u5b58\u50a8\u952e\u503c\u5bf9\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5e7f\u6cdb\u7528\u4e8e\u5404\u79cd\u573a\u666f\u4e2d\u3002\u6709\u6548\u5730\u904d\u5386Map\u5bf9\u4e8e\u7f16\u7a0b\u5b9e\u8df5\u6765\u8bf4\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecdJava Map\u7684\u51e0\u79cd\u904d\u5386\u65b9\u5f0f\uff0c\u5e76\u63d0\u4f9b\u76f8\u5e94\u7684\u793a\u4f8b\uff0c\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u4e00\u3001Map\u904d\u5386\u7684\u57fa\u672c\u6982\u5ff5<\/h5>\n\n\n\n<p>Map\u904d\u5386\u6307\u7684\u662f\u6309\u4e00\u5b9a\u987a\u5e8f\u8bbf\u95eeMap\u4e2d\u7684\u6bcf\u4e2a\u952e\u503c\u5bf9\u3002\u7531\u4e8eMap\u4e0d\u50cfList\u90a3\u6837\u6709\u7d22\u5f15\uff0c\u6240\u4ee5\u6211\u4eec\u901a\u5e38\u901a\u8fc7\u952e\uff08Key\uff09\u3001\u503c\uff08Value\uff09\u6216\u952e\u503c\u5bf9\uff08Entry\uff09\u6765\u904d\u5386\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u4e8c\u3001\u5e38\u7528\u7684Map\u904d\u5386\u65b9\u6cd5<\/h5>\n\n\n\n<h6 class=\"wp-block-heading\">1. \u4f7f\u7528<code>forEach<\/code>\u5faa\u73af\uff08\u63a8\u8350\uff09<\/h6>\n\n\n\n<p>Java 8 \u5f15\u5165\u7684<code>forEach<\/code>\u65b9\u6cd5\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u7b80\u6d01\u3001\u66f4\u73b0\u4ee3\u7684\u904d\u5386Map\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-white-color has-black-background-color has-text-color has-background has-link-color wp-elements-700f5802987687ef53d7858aacb42557\"><code>Map&lt;String, Integer&gt; map = new HashMap&lt;&gt;();\nmap.put(\"apple\", 10);\nmap.put(\"banana\", 20);\n\nmap.forEach((key, value) -&gt; System.out.println(\"Key: \" + key + \", Value: \" + value));\n<\/code><\/pre>\n\n\n\n<h6 class=\"wp-block-heading\">2. \u4f7f\u7528<code>entrySet()<\/code>\u904d\u5386<\/h6>\n\n\n\n<p>\u901a\u8fc7<code>entrySet()<\/code>\u83b7\u53d6Map\u4e2d\u7684\u952e\u503c\u5bf9\u96c6\u5408\uff0c\u7136\u540e\u904d\u5386\u8fd9\u4e2a\u96c6\u5408\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-white-color has-black-background-color has-text-color has-background has-link-color wp-elements-9e732ca6a8daf1bef6a55bdb573b14fb\"><code>for (Map.Entry&lt;String, Integer&gt; entry : map.entrySet()) {\n    System.out.println(\"Key: \" + entry.getKey() + \", Value: \" + entry.getValue());\n}\n<\/code><\/pre>\n\n\n\n<h6 class=\"wp-block-heading\">3. \u4f7f\u7528<code>keySet()<\/code>\u548c<code>values()<\/code><\/h6>\n\n\n\n<p>\u4f7f\u7528<code>keySet()<\/code>\u904d\u5386\u6240\u6709\u952e\uff0c\u4f7f\u7528<code>values()<\/code>\u904d\u5386\u6240\u6709\u503c\u3002\u9002\u5408\u5728\u53ea\u9700\u8981\u952e\u6216\u503c\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-white-color has-black-background-color has-text-color has-background has-link-color wp-elements-2b9cf9a7d0b7a9aec6d24fd6931cc5a6\"><code>\/\/ \u904d\u5386\u952e\nfor (String key : map.keySet()) {\n    System.out.println(\"Key: \" + key);\n}\n\n\/\/ \u904d\u5386\u503c\nfor (Integer value : map.values()) {\n    System.out.println(\"Value: \" + value);\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Java\u4e2d\u7684Map\u662f\u4e00\u79cd\u5b58\u50a8\u952e\u503c\u5bf9\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5e7f\u6cdb\u7528\u4e8e\u5404\u79cd\u573a\u666f\u4e2d\u3002\u6709\u6548\u5730\u904d\u5386Map\u5bf9\u4e8e\u7f16\u7a0b\u5b9e\u8df5\u6765\u8bf4\u81f3\u5173\u91cd\u8981\u3002\u672c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118,59],"tags":[85,16],"class_list":["post-1400","post","type-post","status-publish","format-standard","hentry","category-118","category-59","tag-map","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java Map\u904d\u5386\uff1a\u591a\u79cd\u65b9\u5f0f\u6df1\u5165\u63a2\u7d22<\/title>\n<meta name=\"description\" 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