{"id":5120,"date":"2020-11-05T22:25:00","date_gmt":"2020-11-05T14:25:00","guid":{"rendered":"https:\/\/www.xttblog.com\/?p=5120"},"modified":"2020-11-05T22:27:01","modified_gmt":"2020-11-05T14:27:01","slug":"%e9%ab%98%e5%b9%b6%e5%8f%91%e7%8e%af%e5%a2%83%e4%b8%8b%ef%bc%8chashmap%e5%8f%af%e8%83%bd%e5%87%ba%e7%8e%b0%e7%9a%84%e8%87%b4%e5%91%bd%e9%97%ae%e9%a2%98%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=5120","title":{"rendered":"\u9ad8\u5e76\u53d1\u73af\u5883\u4e0b\uff0cHashMap\u53ef\u80fd\u51fa\u73b0\u7684\u81f4\u547d\u95ee\u9898\uff01"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u9ad8\u5e76\u53d1\u73af\u5883\u4e0b\uff0cHashMap\u53ef\u80fd\u51fa\u73b0\u7684\u81f4\u547d\u95ee\u9898\uff01\u6ce8\u610f\uff1a\u662f\u5728 jdk8 \u4ee5\u4e0b\u7248\u672c\u53d1\u751f\uff01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5148\u6765\u770b\u770b Rehash \u7684\u6982\u5ff5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rehash \u662f HashMap \u5728\u6269\u5bb9\u65f6\u5019\u7684\u4e00\u4e2a\u6b65\u9aa4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HashMap \u7684\u5bb9\u91cf\u662f\u6709\u9650\u7684\u3002\u5f53\u7ecf\u8fc7\u591a\u6b21\u5143\u7d20\u63d2\u5165\uff0c\u4f7f\u5f97 HashMap \u8fbe\u5230\u4e00\u5b9a\u9971\u548c\u5ea6\u65f6\uff0cKey \u6620\u5c04\u4f4d\u7f6e\u53d1\u751f\u51b2\u7a81\u7684\u51e0\u7387\u4f1a\u9010\u6e10\u63d0\u9ad8\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u65f6\u5019\uff0cHashMap \u9700\u8981\u6269\u5c55\u5b83\u7684\u957f\u5ea6\uff0c\u4e5f\u5c31\u662f\u8fdb\u884c Resize\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map1.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f71\u54cd\u53d1\u751f Resize \u7684\u56e0\u7d20\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Capacity\uff08HashMap \u7684\u5f53\u524d\u957f\u5ea6\u2013\u5bb9\u91cf\uff09<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">HashMap \u7684\u5f53\u524d\u957f\u5ea6\u3002\u4e0a\u4e00\u671f\u66fe\u7ecf\u8bf4\u8fc7\uff0cHashMap \u7684\u957f\u5ea6\u662f 2 \u7684\u5e42\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>LoadFactor\uff08\u8d1f\u8f7d\u56e0\u5b50\uff09<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">HashMap \u8d1f\u8f7d\u56e0\u5b50\uff0c\u9ed8\u8ba4\u503c\u4e3a 0.75f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8861\u91cf HashMap \u662f\u5426\u8fdb\u884c Resize \u7684\u6761\u4ef6\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>HashMap.Size &gt;= Capacity * LoadFactor \uff08\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f == \u539f\u6765\u957f\u5ea6 * 0.75\uff09<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>HashMap \u7684 Resize \u65b9\u6cd5\u5177\u4f53\u505a\u4e86\u4ec0\u4e48\u4e8b\u60c5\uff1f<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6269\u5bb9<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Entry\u7a7a\u6570\u7ec4\uff0c\u957f\u5ea6\u662f\u539f\u6570\u7ec4\u76842\u500d\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>ReHash<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u904d\u5386\u539f Entry \u6570\u7ec4\uff0c\u628a\u6240\u6709\u7684 Entry \u91cd\u65b0 Hash \u5230\u65b0\u6570\u7ec4\u3002\u4e3a\u4ec0\u4e48\u8981\u91cd\u65b0 Hash \u5462\uff1f\u56e0\u4e3a\u957f\u5ea6\u6269\u5927\u4ee5\u540e\uff0cHash \u7684\u89c4\u5219\u4e5f\u968f\u4e4b\u6539\u53d8\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ba9\u6211\u4eec\u56de\u987e\u4e00\u4e0bHash\u516c\u5f0f\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>index = HashCode\uff08Key\uff09 &amp; \uff08Length - 1\uff09<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u539f\u6570\u7ec4\u957f\u5ea6\u4e3a 8 \u65f6\uff0cHash \u8fd0\u7b97\u662f\u548c 111B\uff08\u4ee3\u8868\u4e8c\u8fdb\u5236\u7684 7\uff09\u505a\u4e0e\u8fd0\u7b97\uff1b\u65b0\u6570\u7ec4\u957f\u5ea6\u4e3a16\uff0cHash \u8fd0\u7b97\u662f\u548c 1111B\uff08\u4ee3\u8868\u4e8c\u8fdb\u5236\u7684 15\uff09\u505a\u4e0e\u8fd0\u7b97\u3002Hash \u7ed3\u679c\u663e\u7136\u4e0d\u540c<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map2.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map3.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">ReHash \u7684 Java \u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * Transfers all entries from current table to newTable.\n *\/\nvoid transfer(Entry[] newTable, boolean rehash) {\n    int newCapacity = newTable.length;\n    for (Entry&lt;K,V&gt; e : table) {\n        while(null != e) {\n            Entry&lt;K,V&gt; next = e.next;\n            if (rehash) {\n                e.hash = null == e.key ? 0 : hash(e.key);\n            }\n            int i = indexFor(e.hash, newCapacity);\n            e.next = newTable[i];\n            newTable[i] = e;\n            e = next;\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f HashMap \u5728\u591a\u7ebf\u7a0b\u4e0b\u7684 Rehash \u53ef\u80fd\u4f1a\u51fa\u73b0\u4ec0\u4e48\u6837\u7684\u95ee\u9898\u5462\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u73b0\u5728\u5047\u8bbe\u4e00\u4e2a HashMap \u5df2\u7ecf\u5230\u4e86 Resize \u7684\u4e34\u754c\u70b9\u3002\u6b64\u65f6\u6709\u4e24\u4e2a\u7ebf\u7a0b A \u548c B\uff0c\u5728\u540c\u4e00\u65f6\u523b\u5bf9 HashMap \u8fdb\u884c Put \u64cd\u4f5c\uff1a<\/em><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map4.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6\u8fbe\u5230 Resize \u6761\u4ef6\uff0c\u4e24\u4e2a\u7ebf\u7a0b\u5404\u81ea\u8fdb\u884c Rezie \u7684\u7b2c\u4e00\u6b65\uff0c\u4e5f\u5c31\u662f\u6269\u5bb9\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u65f6\u5019\uff0c\u4e24\u4e2a\u7ebf\u7a0b\u90fd\u8d70\u5230\u4e86 ReHash \u7684\u6b65\u9aa4\u3002\u8ba9\u6211\u4eec\u56de\u987e\u4e00\u4e0b ReHash \u7684\u4ee3\u7801\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map5.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u5982\u6b64\u65f6\u7ebf\u7a0b B \u904d\u5386\u5230 Entry3 \u5bf9\u8c61\uff0c\u521a\u6267\u884c\u5b8c\u7ea2\u6846\u91cc\u7684\u8fd9\u884c\u4ee3\u7801\uff0c\u7ebf\u7a0b\u5c31\u88ab\u6302\u8d77\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u7ebf\u7a0b B \u6765\u8bf4\uff1a<code>e = Entry3 next =Entry2<\/code> \u8fd9\u65f6\u5019\u7ebf\u7a0b A \u7545\u901a\u65e0\u963b\u5730\u8fdb\u884c\u7740 Rehash\uff0c\u5f53 ReHash \u5b8c\u6210\u540e\uff0c\u7ed3\u679c\u5982\u4e0b\uff08\u56fe\u4e2d\u7684 e \u548c next\uff0c\u4ee3\u8868\u7ebf\u7a0b B \u7684\u4e24\u4e2a\u5f15\u7528\uff09\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map6.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f4\u5230\u8fd9\u4e00\u6b65\uff0c\u770b\u8d77\u6765\u6ca1\u4ec0\u4e48\u6bdb\u75c5\u3002\u63a5\u4e0b\u6765\u7ebf\u7a0b B \u6062\u590d\uff0c\u7ee7\u7eed\u6267\u884c\u5c5e\u4e8e\u5b83\u81ea\u5df1\u7684 ReHash\u3002\n\u7ebf\u7a0b B \u521a\u624d\u7684\u72b6\u6001\u662f\uff1a<code>e = Entry3 next = Entry2<\/code><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map7.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u6267\u884c\u5230\u4e0a\u9762\u8fd9\u4e00\u884c\u65f6\uff0c\u663e\u7136 i = 3\uff0c\u56e0\u4e3a\u521a\u624d\u7ebf\u7a0b A \u5bf9\u4e8e Entry3 \u7684 hash \u7ed3\u679c\u4e5f\u662f3\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map8.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u7ee7\u7eed\u6267\u884c\u5230\u8fd9\u4e24\u884c\uff0cEntry3 \u653e\u5165\u4e86\u7ebf\u7a0b B \u7684\u6570\u7ec4\u4e0b\u6807\u4e3a 3 \u7684\u4f4d\u7f6e\uff0c\u5e76\u4e14 e \u6307\u5411\u4e86 Entry2\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6 e \u548c next \u7684\u6307\u5411\u5173\u7cfb\uff1a<code>e =Entry2 next = Entry2<\/code> \u6574\u4f53\u60c5\u51b5\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map9.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u7740\u662f\u65b0\u4e00\u8f6e\u5faa\u73af\uff0c\u53c8\u6267\u884c\u5230\u7ea2\u6846\u5185\u7684\u4ee3\u7801\u884c\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map10.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>e = Entry2<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>next = Entry3<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6574\u4f53\u60c5\u51b5\u5982\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map13.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\u6267\u884c\u4e0b\u9762\u7684\u4e09\u884c\uff0c\u7528\u5934\u63d2\u6cd5\u628a Entry2 \u63d2\u5165\u5230\u4e86\u7ebf\u7a0b B \u7684\u6570\u7ec4\u7684\u5934\u7ed3\u70b9\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map12.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u6574\u4f53\u60c5\u51b5\u5982\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map13.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e09\u6b21\u5faa\u73af\u5f00\u59cb\uff0c\u53c8\u6267\u884c\u5230\u7ea2\u6846\u7684\u4ee3\u7801\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map15.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>e = Entry3<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>next = Entry3.next = null<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\u4e00\u6b65\uff0c\u5f53\u6211\u4eec\u6267\u884c\u4e0b\u9762\u8fd9\u4e00\u884c\u7684\u65f6\u5019\uff0c\u89c1\u8bc1\u5947\u8ff9\u7684\u65f6\u523b\u6765\u4e34\u4e86\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map16.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<pre class=\"wp-block-code\"><code>newTable[i] = Entry2\ne = Entry3\nEntry2.next = Entry3\nEntry3.next = Entry2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u94fe\u8868\u51fa\u73b0\u4e86\u73af\u5f62\uff01\u6574\u4f53\u60c5\u51b5\u5982\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map17.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6\uff0c\u95ee\u9898\u8fd8\u6ca1\u6709\u76f4\u63a5\u4ea7\u751f\u3002\u5f53\u8c03\u7528 Get \u67e5\u627e\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684 Key\uff0c\u800c\u8fd9\u4e2a Key \u7684 Hash \u7ed3\u679c\u6070\u597d\u7b49\u4e8e 3 \u7684\u65f6\u5019\uff0c\u7531\u4e8e\u4f4d\u7f6e 3 \u5e26\u6709\u73af\u5f62\u94fe\u8868\uff0c\u6240\u4ee5\u7a0b\u5e8f\u5c06\u4f1a\u8fdb\u5165\u6b7b\u5faa\u73af\uff01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u79cd\u60c5\u51b5\uff0c\u4e0d\u7981\u8ba9\u4eba\u8054\u60f3\u5230\u4e00\u9053\u7ecf\u5178\u7684\u9762\u8bd5\u9898\uff1a<em>\u5982\u4f55\u5224\u65ad\u94fe\u8868\u6709\u73af\uff1f<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u4f55\u675c\u7edd\u8fd9\u79cd\u60c5\u51b5\uff1f<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/gitee.com\/xmtblog\/img\/raw\/master\/2020\/hashmap\/map18.jpg\" alt=\"\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\u603b\u7ed3\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Hashmap \u5728\u63d2\u5165\u5143\u7d20\u8fc7\u591a\u7684\u65f6\u5019\u9700\u8981\u8fdb\u884c Resize\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Resize \u7684\u6761\u4ef6\u662f <code>HashMap.Size &gt;= Capacity * LoadFactor<\/code>\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Hashmap \u7684 Resize \u5305\u542b\u6269\u5bb9\u548c ReHash \u4e24\u4e2a\u6b65\u9aa4\uff0cReHash \u5728\u5e76\u53d1\u7684\u60c5\u51b5\u4e0b\u53ef\u80fd\u4f1a\u5f62\u6210\u94fe\u8868\u73af\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u94fe\u8868\u5934\u63d2\u6cd5\u7684\u4f1a\u98a0\u5012\u539f\u6765\u4e00\u4e2a\u6563\u5217\u6876\u91cc\u9762\u94fe\u8868\u7684\u987a\u5e8f\u3002\u5728\u5e76\u53d1\u7684\u65f6\u5019\u539f\u6765\u7684\u987a\u5e8f\u88ab\u53e6\u5916\u4e00\u4e2a\u7ebf\u7a0b a \u98a0\u5012\u4e86\uff0c\u800c\u88ab\u6302\u8d77\u7ebf\u7a0b b \u6062\u590d\u540e\u62ff\u6269\u5bb9\u524d\u7684\u8282\u70b9\u548c\u987a\u5e8f\u7ee7\u7eed\u5b8c\u6210\u7b2c\u4e00\u6b21\u5faa\u73af\u540e\uff0c\u53c8\u9075\u5faa a \u7ebf\u7a0b\u6269\u5bb9\u540e\u7684\u94fe\u8868\u987a\u5e8f\u91cd\u65b0\u6392\u5217\u94fe\u8868\u4e2d\u7684\u987a\u5e8f\uff0c\u6700\u7ec8\u5f62\u6210\u4e86\u73af\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u540e\u6765 HashMap \u6539\u4e3a\u5c3e\u63d2\u6cd5\u7684\u539f\u56e0\u4e4b\u4e00\u3002<\/p>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font color=\"red\">xttblog2<\/font>\u3002\u5907\u6ce8\uff1a\u201c1\u201d\uff0c\u6dfb\u52a0\u535a\u4e3b\u5fae\u4fe1\u62c9\u4f60\u8fdb\u5fae\u4fe1\u7fa4\u3002\u5907\u6ce8\u9519\u8bef\u4e0d\u4f1a\u540c\u610f\u597d\u53cb\u7533\u8bf7\u3002<\/b>\u518d\u6b21\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff01\u540e\u7eed\u6709\u7cbe\u5f69\u5185\u5bb9\u4f1a\u7b2c\u4e00\u65f6\u95f4\u53d1\u7ed9\u60a8\uff01\u539f\u521b\u6587\u7ae0\u6295\u7a3f\u8bf7\u53d1\u9001\u81f3532009913@qq.com\u90ae\u7bb1\u3002\u5546\u52a1\u5408\u4f5c\u4e5f\u53ef\u6dfb\u52a0\u4f5c\u8005\u5fae\u4fe1\u8fdb\u884c\u8054\u7cfb\uff01<\/p><p>\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a<a href=\"https:\/\/www.xttblog.com\">\u4e1a\u4f59\u8349<\/a>\uff1a &raquo; <a href=\"https:\/\/www.xttblog.com\/?p=5120\">\u9ad8\u5e76\u53d1\u73af\u5883\u4e0b\uff0cHashMap\u53ef\u80fd\u51fa\u73b0\u7684\u81f4\u547d\u95ee\u9898\uff01<\/a><\/p><!-- <div class=\"bd-reward-stl\"><button id=\"bdRewardBtn\"><span><\/span><\/button><\/div> -->","protected":false},"excerpt":{"rendered":"<p>\u9ad8\u5e76\u53d1\u73af\u5883\u4e0b\uff0cHashMap\u53ef\u80fd\u51fa\u73b0\u7684\u81f4\u547d\u95ee\u9898\uff01\u6ce8\u610f\uff1a\u662f\u5728 jdk8 \u4ee5\u4e0b\u7248\u672c\u53d1\u751f\uff01 \u6211\u4eec\u5148\u6765\u770b\u770b Rehas [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[978,1161,1779,1162,1727],"class_list":["post-5120","post","type-post","status-publish","format-standard","hentry","category-java","tag-hashedcredentialsmatcher","tag-hashmap","tag-hashset","tag-hashtable","tag-java8"],"_links":{"self":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/5120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5120"}],"version-history":[{"count":2,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/5120\/revisions"}],"predecessor-version":[{"id":5122,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/5120\/revisions\/5122"}],"wp:attachment":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}