{"id":92621,"date":"2020-03-15T06:34:45","date_gmt":"2020-03-14T22:34:45","guid":{"rendered":"http:\/\/4563.org\/?p=92621"},"modified":"2020-03-15T06:34:45","modified_gmt":"2020-03-14T22:34:45","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88-java-string-%e5%93%88%e5%b8%8c%e4%b9%98%e6%95%b0%e4%b8%ba-31%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=92621","title":{"rendered":"\u4e3a\u4ec0\u4e48 Java String \u54c8\u5e0c\u4e58\u6570\u4e3a 31\uff1f"},"content":{"rendered":"
\n
\n
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\u4e3a\u4ec0\u4e48 Java String \u54c8\u5e0c\u4e58\u6570\u4e3a 31\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : netty <\/span> <\/i> 77<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

Java String \u7c7b\u7684\u54c8\u5e0c\u4e58\u6570\u9009\u62e9 31\uff0c\u4e3b\u8981\u6709\u4ee5\u4e0b\u51e0\u70b9\u8003\u8651\uff1a<\/p>\n

31 \u662f\u5947\u7d20\u6570\u3002<\/p>\n

\u54c8\u5e0c\u5206\u5e03\u8f83\u4e3a\u5747\u5300\u3002\u5076\u6570\u7684\u51b2\u7a81\u7387\u57fa\u672c\u90fd\u5f88\u9ad8\uff0c\u53ea\u6709\u5c11\u6570\u4f8b\u5916\u3002\u8f83\u5c0f\u7684\u4e58\u6570\uff0c\u51b2\u7a81\u7387\u4e5f\u6bd4\u8f83\u9ad8\uff0c\u5982 1 \u81f3 20\u3002<\/p>\n

\u54c8\u5e0c\u8ba1\u7b97\u901f\u5ea6\u5feb\u3002\u53ef\u7528\u79fb\u4f4d\u548c\u51cf\u6cd5\u6765\u4ee3\u66ff\u4e58\u6cd5\u3002\u73b0\u4ee3\u7684 VM \u53ef\u4ee5\u81ea\u52a8\u5b8c\u6210\u8fd9\u79cd\u4f18\u5316\uff0c\u5982 31 * i = (i << 5) – i\u3002<\/p>\n

31 \u548c 33 \u7684\u8ba1\u7b97\u901f\u5ea6\u548c\u54c8\u5e0c\u5206\u5e03\u57fa\u672c\u4e00\u81f4\uff0c\u6574\u4f53\u8868\u73b0\u597d\uff0c\u9009\u62e9\u5b83\u4eec\u5c31\u5f88\u81ea\u7136\u4e86\u3002<\/p>\n

https:\/\/mp.weixin.qq.com\/s\/sCWQGU_OWiQkDUuSPXvw-w<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (18<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : mejee <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u63a8\u5e7f\u5c31\u63a8\u5e7f\uff0c\u8fd8\u5f04\u8fd9\u4e48\u4e2a\u6807\u9898 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wysnylc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e3a\u4ec0\u4e48\u4e0d\u662f 42 \u5462\uff1f\u9009\u5565\u4f60\u90fd\u6709\u7834\u7406\u7531 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : netty <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @mejee \u53e6\u4e00\u4e2a\u8bcd\u53eb\uff1a\u5206\u4eab\u3002\u6807\u9898\u672c\u6765\u5c31\u662f\u8fd9\u4e2a\u554a\uff0c\u89c9\u5f97\u6709\u70b9\u4ef7\u503c\u7684\u624d\u5206\u4eab\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : netty <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wysnylc \u600e\u4e48\u80fd\u8fd9\u4e48\u8bf4\u5462\uff0c\u6587\u7ae0\u6709\u6570\u636e\u8bf4\u660e\uff0c\u4e0d\u662f\u4e71\u6765\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : mightofcode <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e3a\u4ec0\u4e48\u201c\u5076\u6570\u7684\u54c8\u5e0c\u6548\u679c\u975e\u5e38\u5dee\u201d\u5462 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : aguesuka <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    netty \u8fd9\u4e48\u597d\u7684 id\uff0c\u7ed3\u679c\u5168\u662f\u63a8\u5e7f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : netty <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @mightofcode \u54c8\u5e0c\u7684\u6548\u7387\uff0c\u7b80\u5355\u7684\u7406\u89e3\u53d6\u51b3\u4e8e\u51b2\u7a81\uff1a\u5b58\u50a8\u7684\u51b2\u7a81\u7387\uff0c\u4ee5\u53ca\u89e3\u51b3\u51b2\u7a81\u7684\u6548\u7387\u3002\u5076\u6570\u7684\u54c8\u5e0c\u51b2\u7a81\u7387\u8f83\u9ad8\uff0c\u89e3\u51b3\u51b2\u7a81\u8017\u65f6\uff0c\u67e5\u627e\u6570\u636e\u4e5f\u8017\u65f6\uff0cO(1)\u6700\u597d\uff0c\u51b2\u7a81\u8d8a\u9ad8\u8d8a\u5f80 O(n)\u65b9\u5411\u9760 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : salamanderMH <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6211\u5728 SF \u4e0a\u770b\u8fc7\u4e00\u7bc7\u6587\u7ae0\u7684\u5206\u6790 https:\/\/segmentfault.com\/a\/1190000010799123 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hantsy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @netty \u7528\u4ec0\u4e48\u7b80\u5355\u7684\u6570\u5b66\u6559\u7a0b\u5417\uff1f\u73b0\u5728\u5f88\u591a\u5e74\u6ca1\u6709\u770b\u7b97\u6cd5\u4e4b\u7c7b\uff0c\u73b0\u5728\u53d1\u73b0\u5f88\u591a\u516c\u5f0f\uff0cBig O \u770b\u4e0d\u61c2\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : mightofcode <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @netty \u4e3a\u4ec0\u4e48\u201c\u5076\u6570\u7684\u54c8\u5e0c\u51b2\u7a81\u7387\u8f83\u9ad8\u201d\u5462\uff0c\u4e0d\u592a\u660e\u767d <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : publicccc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u611f\u89c9\u4e00\u4e2a\u5947\u602a\u7684\u95ee\u9898\uff0c
    \u63a8\u5e7f\u535a\u5ba2\u5927\u5bb6\u90fd\u6bd4\u8f83\u5305\u5bb9\uff0c
    \u4f46\u662f\u63a8\u5e7f\u516c\u4f17\u53f7\u975e\u5e38\u5bb9\u6613\u5f15\u8d77\u53cd\u611f\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : chinvo <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u867d\u7136\u8fd9\u4e2a\u8bba\u575b\u4e0d\u53cd\u5bf9\u5206\u4eab\u3001\u8f6c\u8f7d\uff0c\u4f46\u662f\u4f60\u8fd9\u6837\u201c\u63a8\u5e7f\u201d\u771f\u7684\u5f88\u60f9\u4eba\u538c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : netty <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @mightofcode
    \u9996\u5148\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u4e2a\u54c8\u5e0c\u7b97\u6cd5\u9488\u5bf9\u7684\u662f “\u5b57\u7b26\u4e32” \u54c8\u5e0c\u7801\u7684\u8ba1\u7b97\u3002
    \u5176\u6b21\uff0c\u5076\u6570\u7684\u51b2\u7a81\u7387\u9ad8\u9488\u5bf9\u7684\u662f\u8fd9\u6bb5\u7b97\u6cd5\uff0c\u5bf9\u4e8e\u5176\u4ed6\u7b97\u6cd5\u4e0d\u4e00\u5b9a\u9002\u7528\uff1a
    for (int i = 0; i < value.length; i++) {
    h = 31 * h + val[i];
    }
    \u76ee\u524d\u636e\u6211\u4e86\u89e3\u5230\u7684\uff0c\u90fd\u662f\u901a\u8fc7\u6d4b\u8bd5\u6570\u636e\u6765\u8bc1\u660e\u3002\u8981\u89e3\u91ca\u4e3a\u4ec0\u4e48\uff0c\u5c31\u8981\u53bb\u7814\u7a76\u4e0a\u9762\u8fd9\u6bb5\u4ee3\u7801\u3002
    \u5982\u679c\u6709\u540c\u5b66\u66f4\u4e86\u89e3\u7684\uff0c\u4e5f\u53ef\u4ee5\u89e3\u91ca\u4e00\u4e0b^_^ <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : netty <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @chinvo \u4e0d\u597d\u610f\u601d\uff0c\u5411\u5927\u5bb6\u9053\u6b49\uff0c\u56de\u53bb\u81ea\u6211\u68c0\u8ba8\u3002\u4e4b\u524d\u56e0\u4e3a\u53d1\u8868\u4e0d\u4e86\u4e5f\u6ca1\u6709\u53d1\uff0c\u73b0\u5728\u53ef\u4ee5\u53d1\u4e86\uff0c\u60f3\u5230\u6709\u51e0\u7bc7\u81ea\u5df1\u8fd8\u4e0d\u9519\u7684\u6587\u7ae0\u5c31\u53d1\u4e86\u4e00\u4e0b\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : BruceHong <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u662f\u5b9e\u9a8c\u6570\u636e\u7ed3\u679c\u89c2\u5bdf\u6765\u7684\uff0c\u4e0d\u4ec5\u662f Java\uff0cPHP \u7684\u6570\u7ec4\u5e95\u5c42 HashTable \u5b9e\u73b0\u4e5f\u662f\u8fd9\u4e2a\u6570 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zxcslove <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @publicccc \u5e94\u8be5\u662f\u56e0\u4e3a\u535a\u5ba2\u6ca1\u6709\u7f81\u7eca\uff0c\u516c\u4f17\u53f7\u6709 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : secondwtq <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    “\u63a8\u5e7f\u201c\u516c\u4f17\u53f7\u6587\u7ae0\u6211\u89c9\u5f97\u6ca1\u4ec0\u4e48\uff0c\u8fd9\u4e2a\u8d34\u5b50\u53ea\u770b\u5185\u5bb9\u9664\u4e86\u94fe\u63a5\u57df\u540d\u4e0d\u4e00\u6837\u4e4b\u5916\u548c\u5176\u4ed6\u5206\u4eab\u535a\u5ba2\u6587\u7ae0\u7684\u6ca1\u5565\u533a\u522b\uff0c\u4e5f\u6ca1\u653e\u4e2a\u4e8c\u7ef4\u7801\u6c42\u5173\u6ce8\u3002<\/p>\n

    \u4e3b\u8981\u662f\u8fd9\u4e2a\u6807\u9898\u770b\u4e0a\u53bb\u50cf\u4e2a\u95ee\u9898\uff0c\u70b9\u8fdb\u6765\u53d1\u73b0\u662f\u4e2a\u6587\u7ae0\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : deepreader <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6570\u636e\u91cf\u5927\u7684\u9879\u76ee\uff0c\u7ed3\u679c\u6570\u636e\u5929\u5929\u5c31 hash collisions\u3002
    \u5df2\u7ecf\u6362\u6210 farmhash \u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u4e3a\u4ec0\u4e48 Java String \u54c8…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/92621"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=92621"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/92621\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=92621"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=92621"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=92621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}