{"id":45282,"date":"2023-12-11T15:05:23","date_gmt":"2023-12-11T07:05:23","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=45282"},"modified":"2023-12-11T15:05:23","modified_gmt":"2023-12-11T07:05:23","slug":"%e4%bb%8b%e7%bb%8d%e4%b8%80%e4%b8%8b%ef%bc%8c%e4%bb%80%e4%b9%88%e6%98%afhashmap-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/%e4%bb%8b%e7%bb%8d%e4%b8%80%e4%b8%8b%ef%bc%8c%e4%bb%80%e4%b9%88%e6%98%afhashmap-2\/","title":{"rendered":"\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u4ec0\u4e48\u662fhashmap?"},"content":{"rendered":"<p>&#8220;`&#8221;                    \u8003\u5bdf\u70b9\uff1a\u54c8\u5e0c\u8868<\/p>\n<p>HashMap \u662f\u4e00\u4e2a\u6563\u5217\u8868\uff0c\u5b83\u5b58\u50a8\u7684\u5185\u5bb9\u662f\u952e\u503c\u5bf9(key-value)\u6620\u5c04\u3002<br \/>\nHashMap \u7ee7\u627f\u4e8eAbstractMap\uff0c\u5b9e\u73b0\u4e86Map\u3001Cloneable\u3001java.io.Serializable\u63a5\u53e3\u3002<br \/>\nHashMap \u7684\u5b9e\u73b0\u4e0d\u662f\u540c\u6b65\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u3002\u5b83\u7684key\u3001value\u90fd\u53ef\u4ee5\u4e3anull\u3002\u6b64\u5916\uff0cHashMap\u4e2d\u7684\u6620\u5c04\u4e0d\u662f\u6709\u5e8f\u7684\u3002<\/p>\n<p>HashMap \u7684\u5b9e\u4f8b\u6709\u4e24\u4e2a\u53c2\u6570\u5f71\u54cd\u5176\u6027\u80fd\uff1a\u201c\u521d\u59cb\u5bb9\u91cf\u201d \u548c \u201c\u52a0\u8f7d\u56e0\u5b50\u201d\u3002\u5bb9\u91cf \u662f\u54c8\u5e0c\u8868\u4e2d\u6876\u7684\u6570\u91cf\uff0c\u521d\u59cb\u5bb9\u91cf \u53ea\u662f\u54c8\u5e0c\u8868\u5728\u521b\u5efa\u65f6\u7684\u5bb9\u91cf\u3002\u52a0\u8f7d\u56e0\u5b50 \u662f\u54c8\u5e0c\u8868\u5728\u5176\u5bb9\u91cf\u81ea\u52a8\u589e\u52a0\u4e4b\u524d\u53ef\u4ee5\u8fbe\u5230\u591a\u6ee1\u7684\u4e00\u79cd\u5c3a\u5ea6\u3002\u5f53\u54c8\u5e0c\u8868\u4e2d\u7684\u6761\u76ee\u6570\u8d85\u51fa\u4e86\u52a0\u8f7d\u56e0\u5b50\u4e0e\u5f53\u524d\u5bb9\u91cf\u7684\u4e58\u79ef\u65f6\uff0c\u5219\u8981\u5bf9\u8be5\u54c8\u5e0c\u8868\u8fdb\u884c rehash \u64cd\u4f5c\uff08\u5373\u91cd\u5efa\u5185\u90e8\u6570\u636e\u7ed3\u6784\uff09\uff0c\u4ece\u800c\u54c8\u5e0c\u8868\u5c06\u5177\u6709\u5927\u7ea6\u4e24\u500d\u7684\u6876\u6570\u3002<br \/>\n\u901a\u5e38\uff0c\u9ed8\u8ba4\u52a0\u8f7d\u56e0\u5b50\u662f 0.75, \u8fd9\u662f\u5728\u65f6\u95f4\u548c\u7a7a\u95f4\u6210\u672c\u4e0a\u5bfb\u6c42\u4e00\u79cd\u6298\u8877\u3002\u52a0\u8f7d\u56e0\u5b50\u8fc7\u9ad8\u867d\u7136\u51cf\u5c11\u4e86\u7a7a\u95f4\u5f00\u9500\uff0c\u4f46\u540c\u65f6\u4e5f\u589e\u52a0\u4e86\u67e5\u8be2\u6210\u672c\uff08\u5728\u5927\u591a\u6570 HashMap \u7c7b\u7684\u64cd\u4f5c\u4e2d\uff0c\u5305\u62ec get \u548c put \u64cd\u4f5c\uff0c\u90fd\u53cd\u6620\u4e86\u8fd9\u4e00\u70b9\uff09\u3002\u5728\u8bbe\u7f6e\u521d\u59cb\u5bb9\u91cf\u65f6\u5e94\u8be5\u8003\u8651\u5230\u6620\u5c04\u4e2d\u6240\u9700\u7684\u6761\u76ee\u6570\u53ca\u5176\u52a0\u8f7d\u56e0\u5b50\uff0c\u4ee5\u4fbf\u6700\u5927\u9650\u5ea6\u5730\u51cf\u5c11 rehash \u64cd\u4f5c\u6b21\u6570\u3002\u5982\u679c\u521d\u59cb\u5bb9\u91cf\u5927\u4e8e\u6700\u5927\u6761\u76ee\u6570\u9664\u4ee5\u52a0\u8f7d\u56e0\u5b50\uff0c\u5219\u4e0d\u4f1a\u53d1\u751frehash \u64cd\u4f5c\u3002<\/p>\n<p>hashmap\u5171\u67094\u4e2a\u6784\u9020\u51fd\u6570\uff1a<\/p>\n<p>\/\/ \u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u3002HashMap()<\/p>\n<p>\/\/ \u6307\u5b9a\u201c\u5bb9\u91cf\u5927\u5c0f\u201d\u7684\u6784\u9020\u51fd\u6570<\/p>\n<p>HashMap(int capacity)<\/p>\n<p>\/\/ \u6307\u5b9a\u201c\u5bb9\u91cf\u5927\u5c0f\u201d\u548c\u201c\u52a0\u8f7d\u56e0\u5b50\u201d\u7684\u6784\u9020\u51fd\u6570<\/p>\n<p>HashMap(int capacity, float loadFactor)<\/p>\n<p>\/\/ \u5305\u542b\u201c\u5b50Map\u201d\u7684\u6784\u9020\u51fd\u6570<\/p>\n<p>HashMap(Map&lt;? extends K, ? extends V&gt; map)<\/p>\n<p>&lt;pre&gt;&lt;code&gt;            &quot;&#8220;`<br \/>\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;`&#8221; \u8003\u5bdf\u70b9\uff1a\u54c8\u5e0c\u8868 HashMap \u662f\u4e00\u4e2a\u6563\u5217\u8868\uff0c\u5b83\u5b58\u50a8\u7684\u5185\u5bb9\u662f\u952e\u503c\u5bf9(key-v [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-45282","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=45282"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45282\/revisions"}],"predecessor-version":[{"id":45283,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45282\/revisions\/45283"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=45282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=45282"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=45282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}