{"id":2550,"date":"2022-11-21T23:34:48","date_gmt":"2022-11-21T15:34:48","guid":{"rendered":"http:\/\/tihar-tech.cn\/?p=2550"},"modified":"2022-11-21T23:34:48","modified_gmt":"2022-11-21T15:34:48","slug":"%e6%8e%92%e5%ba%8f%e7%9a%84k-v%e7%bb%93%e6%9e%84%e5%ae%9e%e7%8e%b0-treemap%e3%80%81treeset%e6%ba%90%e7%a0%81%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"http:\/\/139.196.114.170\/?p=2550","title":{"rendered":"\u6392\u5e8f\u7684K-V\u7ed3\u6784\u5b9e\u73b0 – TreeMap\u3001TreeSet\u6e90\u7801\u5206\u6790"},"content":{"rendered":"

\u7efc\u8ff0<\/h1>\n

TreeMap\u3001TreeSet\u96c6\u5408\u7c7b\u4e2d\u7684\u5143\u7d20\u662f\u6709\u5e8f\u5b58\u50a8\u7684\uff0c\u5e95\u5c42\u6570\u636e\u7ed3\u6784\u662f\u7ea2\u9ed1\u6811
\nTreeMap\u662f\u8986\u76d6\u5f0f\u63d2\u5165\uff0c\u76f8\u540cKey\u503c\u7684(Key, Val)\u66f4\u65b0Val\u4e3a\u6700\u65b0\u503c
\nTreeSet\u5e95\u5c42\u5b9e\u73b0\u57fa\u4e8eTreeMap<\/p>\n

TreeMap<\/h2>\n

Constructor<\/h3>\n

\u9ed8\u8ba4\u7a7a\u53c2\u6784\u9020\u51fd\u6570\uff0c\u6839\u636eKey\u7c7b\u578b\u5b9e\u73b0\u7684Comparable.compareTo()\u5347\u5e8f\u6392\u5e8f<\/p>\n

\npublic TreeMap() {\n    comparator = null;\n}\n<\/pre>\n
\u6307\u5b9a\u6392\u5e8f\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u4f7f\u7528\u6307\u5b9a\u7684Comparator.compare()\u5347\u5e8f\u6392\u5e8f<\/p>\n
\npublic TreeMap(Comparator comparator) {\n    this.comparator = comparator;\n}\n<\/pre>\n
put()\u65b9\u6cd5<\/h3>\n
\npublic V put(K key, V value) {\n    Entry t = root;\n\n    \/\/ \u9996\u6b21\u6dfb\u52a0\u8bbe\u7f6e\u4e3a\u6839\u8282\u70b9\n    if (t == null) {\n        compare(key, key);\n        root = new Entry<>(key, value, null);\n        size = 1;\n        modCount++;\n        return null;\n    }\n\n    int cmp;\n    Entry parent;\n\n    \/\/ 1.1 \u6309\u7167\u6784\u9020\u51fd\u6570\u6307\u5b9a\u7684Key\u7c7b\u578b\u6392\u5e8f\u89c4\u5219\uff0c\u4f9d\u636eBST\u6027\u8d28\u627e\u5230\u63d2\u5165\u4f4d\u7f6e\n    Comparator cpr = comparator;\n    if (cpr != null) {\n        do {\n            parent = t;\n            cmp = cpr.compare(key, t.key);\n            if (cmp < 0) t = t.left;\n            else if (cmp > 0) t = t.right;\n            \/\/ \u7ea2\u9ed1\u6811\u4e2d\u5b58\u5728\u8be5\u503c\u76f4\u63a5\u8986\u76d6\u66f4\u65b0\n            else return t.setValue(value);\n        } while (t != null);\n    }\n\n    \/\/ 1.2 \u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u672a\u6307\u5b9aKey\u7c7b\u578b\u6392\u5e8f\u89c4\u5219\uff0c\u6307\u5b9a\u6392\u5e8f\u89c4\u5219\u4f7f\u7528Key\u7c7b\u578b\u9ed8\u8ba4\u89c4\u5219\uff0c\u4f9d\u636eBST\u6027\u8d28\u627e\u5230\u63d2\u5165\u4f4d\u7f6e\n    else {\n        \/\/ * \u7a7a\u53c2\u6784\u9020\u51fd\u6570\u4e0d\u5141\u8bb8Key\u4e3anull\n        if (key == null) throw new NullPointerException();\n        \/\/ \u6309\u7167BST\u6027\u8d28\u627e\u5230\u63d2\u5165\u4f4d\u7f6e\n        @SuppressWarnings(\"unchecked\") Comparable k = (Comparable) key;\n        do {\n            parent = t;\n            cmp = k.compareTo(t.key);\n            if (cmp < 0) t = t.left;\n            else if (cmp > 0) t = t.right;\n            \/\/ \u7ea2\u9ed1\u6811\u4e2d\u5b58\u5728\u8be5\u503c\u76f4\u63a5\u8986\u76d6\u66f4\u65b0\n            else return t.setValue(value);\n        } while (t != null);\n    }\n\n    \/\/ \u65b0\u5efa\u5f85\u63d2\u8282\u70b9\uff0c\u63d2\u5165\u5230BST\u4e2d\uff0c\u5e76\u8fdb\u884c\u5e73\u8861\u8c03\u6574\u7ef4\u62a4RBT\u6027\u8d28\n    Entry e = new Entry<>(key, value, parent);\n    if (cmp < 0) parent.left = e;\n    else parent.right = e;\n    fixAfterInsertion(e);\n\n    \/\/ \u7ef4\u62a4\u63d2\u5165\u540e\u7684\u6570\u91cf\n    size++;\n    modCount++;\n    return null;\n}\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u7efc\u8ff0 TreeMap\u3001TreeSet\u96c6\u5408\u7c7b\u4e2d\u7684\u5143\u7d20\u662f\u6709\u5e8f\u5b58\u50a8\u7684\uff0c\u5e95\u5c42\u6570\u636e\u7ed3\u6784\u662f\u7ea2\u9ed1\u6811 TreeMap\u662f\u8986\u76d6\u5f0f\u63d2 … <\/p>\n
\u7ee7\u7eed\u9605\u8bfb\u201c\u6392\u5e8f\u7684K-V\u7ed3\u6784\u5b9e\u73b0 – TreeMap\u3001TreeSet\u6e90\u7801\u5206\u6790\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[25],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts\/2550"}],"collection":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2550"}],"version-history":[{"count":1,"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts\/2550\/revisions"}],"predecessor-version":[{"id":2551,"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts\/2550\/revisions\/2551"}],"wp:attachment":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2550"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}