{"id":75,"date":"2017-08-28T19:30:11","date_gmt":"2017-08-28T11:30:11","guid":{"rendered":"http:\/\/sgvps.hyh0.com\/?p=75"},"modified":"2017-10-30T23:38:31","modified_gmt":"2017-10-30T15:38:31","slug":"java%e4%b8%ad%e7%9a%84%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84-2-hashset","status":"publish","type":"post","link":"https:\/\/www.hyh0.com\/?p=75","title":{"rendered":"Java\u4e2d\u7684\u6570\u636e\u7ed3\u6784 2.HashSet"},"content":{"rendered":"<p>HashSet\u662f\u65e0\u5e8f\u7684\u96c6\u5408\uff0c\u4f46\u5b83\u53ef\u4ee5\u5feb\u901f\u5730\u67e5\u627e\u5143\u7d20<\/p>\n<p>Hash\u503c\u53ef\u4ee5\u88ab\u5feb\u901f\u5730\u8fd0\u7b97\uff0c\u4e14Hash\u503c\u53ea\u4e0e\u5bf9\u8c61\u7684\u72b6\u6001\u6709\u5173<\/p>\n<p>Java\u4e2dHashSet\u662f\u7531\u50a8\u5b58\u5728ArrayList\u4e2d\u7684\u4e00\u7cfb\u5217LinkedList\u5b9e\u73b0\u7684\uff0c\u6bcf\u4e00\u4e2aLinkedList\u88ab\u79f0\u4e3a\u4e00\u4e2abucket\uff0c\u5982\u679c\u8fd9\u91cc\u670916\u4e2abucket\uff08Java\u4e2d\u7684\u9ed8\u8ba4\u503c\uff09\uff0c\u800c\u4e00\u4e2a\u5143\u7d20\u7684Hash\u503c\u4e3a76268\uff0c\u5219\u5b83\u4f1a\u88ab\u50a8\u5b58\u523012\u53f7bucket\uff0876268%16 = 12\uff09\uff0c\u5982\u679c\u8be5Bucket\u5df2\u7ecf\u50a8\u5b58\u4e86\u5143\u7d20\uff0c\u5219\u4f1a\u5c06\u5b83\u4e0e\u6240\u6709\u5143\u7d20\u6bd4\u8f83\uff0c\u5982\u679c\u5b83\u662f\u65b0\u7684\uff0c\u5219\u6dfb\u52a0\u5230LinkedList\u4e2d<\/p>\n<p><!--more--><\/p>\n<p>HashSet\u7684bucket\u7684\u503c\u53ef\u4ee5\u5728\u6784\u9020\u65f6\u7ed9\u51fa\uff0c\u6700\u4f73\u7684\u503c\u662f\u50a8\u5b58\u7684\u5143\u7d20\u6570\u91cf\u768475%\u5230150%<\/p>\n<p>\u4e5f\u53ef\u4ee5\u8bbe\u7f6eHashSet\u7684load factor\uff0c\u8fd9\u662f\u4e00\u4e2a0-1\u7684\u6d6e\u70b9\u6570\uff0c\u5f53HashSet\u5360\u7528\u5230\u90a3\u4e48\u591a\u65f6\uff0c\u5b83\u4f1a\u81ea\u52a8\u8fdb\u884crehashed\u64cd\u4f5c\uff0c\u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u8868\uff08\u539f\u6765\u7684\u4e24\u500d\uff09\uff0c\u5e76\u628a\u65e7\u7684\u6570\u636e\u63d2\u5165\u5230\u65b0\u7684\u8868\u4e2d\uff0c\u5e76\u9500\u6bc1\u65e7\u7684\u8868<\/p>\n<p>HashSet\u5b9e\u73b0\u4e86Iterable\u63a5\u53e3\uff0c\u53ef\u4ee5\u7528\u8fd9\u4e2a\u904d\u5386\u6574\u4e2aHashSet<\/p>\n","protected":false},"excerpt":{"rendered":"<p>HashSet\u662f\u65e0\u5e8f\u7684\u96c6\u5408\uff0c\u4f46\u5b83\u53ef\u4ee5\u5feb\u901f\u5730\u67e5\u627e\u5143\u7d20 Hash\u503c\u53ef\u4ee5\u88ab\u5feb\u901f\u5730\u8fd0\u7b97\uff0c\u4e14Hash\u503c\u53ea\u4e0e\u5bf9\u8c61\u7684\u72b6\u6001\u6709\u5173 &hellip; <a href=\"https:\/\/www.hyh0.com\/?p=75\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">Java\u4e2d\u7684\u6570\u636e\u7ed3\u6784 2.HashSet<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/posts\/75"}],"collection":[{"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=75"}],"version-history":[{"count":2,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/posts\/75\/revisions"}],"predecessor-version":[{"id":109,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/posts\/75\/revisions\/109"}],"wp:attachment":[{"href":"https:\/\/www.hyh0.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=75"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=75"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=75"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}