{"id":31314,"date":"2023-08-14T11:42:22","date_gmt":"2023-09-11T04:07:32","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java7%e5%92%8cjava8%e4%b8%ad%ef%bc%8chashmap%e7%9a%84putall%e6%96%b9%e6%b3%95%e7%9a%84%e8%a1%8c%e4%b8%ba%e6%98%af%e4%b8%8d%e5%90%8c%e7%9a%84%e3%80%82\/"},"modified":"2025-08-12T23:23:56","modified_gmt":"2025-08-12T15:23:56","slug":"%e5%9c%a8java7%e5%92%8cjava8%e4%b8%ad%ef%bc%8chashmap%e7%9a%84putall%e6%96%b9%e6%b3%95%e7%9a%84%e8%a1%8c%e4%b8%ba%e6%98%af%e4%b8%8d%e5%90%8c%e7%9a%84%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java7%e5%92%8cjava8%e4%b8%ad%ef%bc%8chashmap%e7%9a%84putall%e6%96%b9%e6%b3%95%e7%9a%84%e8%a1%8c%e4%b8%ba%e6%98%af%e4%b8%8d%e5%90%8c%e7%9a%84%e3%80%82\/","title":{"rendered":"\u5728Java7\u548cJava8\u4e2d\uff0cHashMap\u7684putAll()\u65b9\u6cd5\u7684\u884c\u4e3a\u662f\u4e0d\u540c\u7684"},"content":{"rendered":"<p>\u6709\u8fd9\u6837\u7684\u4ee3\u7801\u5b58\u5728\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@Override<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"nc\">Object<\/span> <span class=\"nf\">put<\/span><span class=\"o\">(<\/span><span class=\"nc\">Object<\/span> <span class=\"n\">key<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Object<\/span> <span class=\"n\">value<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/ \u30ad\u30fc\u3092\u5c0f\u6587\u5b57\u306b\u3059\u308b<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"n\">key<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">().<\/span><span class=\"na\">toLowerCase<\/span><span class=\"o\">(),<\/span> <span class=\"n\">value<\/span><span class=\"o\">);<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nc\">CustomHashMap<\/span> <span class=\"n\">map<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">CustomHashMap<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">map<\/span><span class=\"o\">.<\/span><span class=\"na\">putAll<\/span><span class=\"o\">(<\/span><span class=\"n\">valueMap<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ Java7\u3067\u306f\u30ad\u30fc\u304c\u3059\u3079\u3066\u5c0f\u6587\u5b57\u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679c\u5c06Java7\u5347\u7ea7\u5230Java8\uff0c\u90a3\u4e48Map\u7684\u952e\u4e0d\u518d\u4fdd\u6301\u5c0f\u5199\uff0c\u800c\u662f\u6539\u53d8\u4e86\u4ee5\u524d\u7684\u884c\u4e3a\u3002<\/p>\n<p>\u65e2\u7136\u5df2\u7ecf\u9605\u8bfb\u4e86HashMap\u7684\u4ee3\u7801\uff0c<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Java7\u3067\u306f\u3001putAll()\u304b\u3089put()\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Java8\u3067\u306f\u3001putAll()\u304b\u3089put()\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u306a\u3044<\/ul>\n<p>\u6839\u636e\u8c03\u67e5\u7ed3\u679c\u5f97\u77e5\uff0c\u95ee\u9898\u7684\u539f\u56e0\u662f\u6ca1\u6709\u8c03\u7528Override\u7684put\u65b9\u6cd5\u3002\u7531\u4e8eputAll\u6ca1\u6709\u8fdb\u884cOverride\uff0c\u6240\u4ee5\u5728Java7\u4e2d\u5076\u7136\u8fd0\u884c\u6b63\u5e38\u3002\u6216\u8bb8\u662f\u56e0\u4e3aJava7\u7684\u5b9e\u73b0\u88ab\u9605\u8bfb\u8fc7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6709\u8fd9\u6837\u7684\u4ee3\u7801\u5b58\u5728\u3002 @Override public Object put(Object key, Objec [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31314","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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