\r\n\/\/ \u5f52\u5e76\u6392\u5e8f\r\n public static void mergeSort (int[] arr) {\r\n \/\/ \u5efa\u4e00\u4e2a\u4e34\u65f6\u6570\u636e\u6765\u5b58\u653e\u6570\u636e\r\n int[] temp = new int[arr.length];\r\n mergeSort(arr, 0, arr.length - 1, temp);\r\n }\r\n\r\n private static void mergeSort(int[] arr, int left, int right, int[] temp) {\r\n if (left < right) { \/\/ \u5982\u679c\u8d77\u59cb\u4e0b\u6807\u8ddf\u7ed3\u675f\u4e0b\u6807\u5dee\u503c\u5c0f\u4e8e1\uff0c\u5219\u4e0d\u8fdb\u884c\u64cd\u4f5c\r\n int mid = (left + right) \/ 2;\r\n mergeSort(arr, left, mid, temp); \/\/ \u5206\u7ec4\uff0c\u5c06\u5de6\u8fb9\u5206\u4e3a\u4e00\u7ec4\uff0c\u9012\u5f52\u8c03\u7528\u8fdb\u884c\u6392\u5e8f\r\n mergeSort(arr, mid+1, right, temp); \/\/ \u5c06\u53f3\u8fb9\u5206\u4e3a\u4e00\u7ec4\r\n merge(arr, left, mid, right, temp); \/\/\u5c06\u5de6\u53f3\u5206\u7ec4\u5408\u5e76\r\n }\r\n }\r\n\r\n private static void merge(int[] arr, int left, int mid, int right, int[] temp) {\r\n int i = left; \/\/ \u5b9a\u4e49\u5de6\u6307\u9488\r\n int j = mid + 1; \/\/ \u5b9a\u4e49\u53f3\u6307\u9488\r\n int t = 0; \/\/ \u7ed9temp\u4e34\u65f6\u6570\u7ec4\u7528\u7684\u6307\u9488\r\n while (i <= mid && j <= right) { \/\/ \u8bbe\u7f6e\u5de6\u53f3\u6307\u9488\u7684\u79fb\u52a8\u8fb9\u754c\r\n if (arr[i] <= arr[j]) { \/\/ \u6b64\u5904\u662f\u5347\u5e8f\uff0c\u6545\u8c01\u5c0f\u8c01\u5148\u8d4b\u7ed9\u4e34\u65f6\u6570\u7ec4\r\n temp[t++] = arr[i++];\r\n } else {\r\n temp[t++] = arr[j++];\r\n }\r\n }\r\n while (i <= mid) { \/\/ \u5982\u679c\u5de6\u8fb9\u6709\u5269\u4f59\uff0c\u5219\u653e\u5728temp\u4e2d\r\n temp[t++] = arr[i++];\r\n }\r\n while (j <= right) { \/\/ \u5982\u679c\u53f3\u8fb9\u6709\u5269\u4f59\uff0c\u4f9d\u6b21\u653e\u5165temp\u4e2d\r\n temp[t++] = arr[j++];\r\n }\r\n t = 0;\r\n \/\/ \u6b64\u65f6temp\u4e2d\u5df2\u7ecf\u662farr\u6570\u7ec4\u4e2d\u4e0b\u6807\u4eceleft\u5230right\u4e4b\u95f4\u6392\u597d\u5e8f\u7684\u6570\u636e\u4e86\uff0c\u56e0\u4e3atemp\u6bcf\u6b21\u90fd\u662f\u4ece0\u5f00\u59cb\u8d4b\u503c\uff0c\u6240\u4ee5\u9700\u5c06\u6392\u597d\u5e8f\u7684\u6570\u653e\u56dearr\u7684\u5bf9\u5e94\u4f4d\u7f6e\r\n while (left <= right) {\r\n \/\/ \u5c06left\u5230right\u4e4b\u95f4\u6392\u597d\u5e8f\u7684\u6570\u636e\u653e\u56dearr\u4e2d\uff0c\u6b64\u65f6left\u5230right\u4e4b\u95f4\u7684\u6570\u5c31\u662f\u6700\u7ec8\u6392\u597d\u5e8f\u7684\u6570\r\n arr[left++] = temp[t++];\r\n }\r\n }\r\n<\/pre>\n

\u5feb\u901f\u6392\u5e8f<\/strong><\/span><\/div>\n
\r\n\/\/ \u5feb\u901f\u6392\u5e8f\r\n public static void quickSort (int[] arr, int left, int right) {\r\n \/\/ \u5148\u5c06\u5f02\u5e38\u60c5\u51b5\u5904\u7406\u6389\r\n if (arr == null || arr.length < 2) {\r\n return;\r\n }\r\n if (right <= left) {\r\n return;\r\n }\r\n if (right - left == 1 && arr[left] <= arr[right]) {\r\n return;\r\n }\r\n \/\/ \u53d6\u7b2c\u4e00\u4e2a\u6570\u4e3a\u57fa\u51c6\u6570(\u57fa\u6570\u53d6\u54ea\u4e2a\u90fd\u884c\uff0c\u6b64\u5904\u662f\u4e3a\u4e86\u65b9\u4fbf)\r\n int index = arr[left];\r\n int i = left + 1; \/\/ \u5de6\u6307\u9488\r\n int j = right; \/\/ \u53f3\u6307\u9488\r\n while (i < j && i < right && j > left) { \/\/ \u8bbe\u7f6e\u6307\u9488\u7684\u79fb\u52a8\u8fb9\u754c\r\n while (arr[j] > index && j > left) {j--;} \/\/ \u627e\u5230\u4ece\u53f3\u8fb9\u6570\u7b2c\u4e00\u4e2a\u6bd4index\u5c0f\u7684\u6570\r\n while (arr[i] < index && i < right) {i++;} \/\/ \u627e\u5230\u4ece\u5de6\u8fb9\u6570\u7b2c\u4e00\u4e2a\u6bd4index\u5927\u7684\u6570\r\n if (i < j) { \/\/ \u4ea4\u6362\u8fd9\u4e24\u4e2a\u6570 \u5982\u679ci == j\uff0c\u8bf4\u660e\u4e8c\u8005\u5b9a\u4f4d\u5230\u4e86\u540c\u4e00\u4e2a\u4f4d\u7f6e\uff0c\u5219\u4e0d\u7528\u4ea4\u6362\uff1b\u5982\u679ci > j\uff0c\u8bf4\u660e\u4e8c\u8005\u5df2\u7ecf\u76f8\u9047\u7136\u540e\u80cc\u5411\u800c\u884c\u4e86\uff0c\u4e5f\u4e0d\u4ea4\u6362\r\n int temp = arr[i];\r\n arr[i] = arr[j];\r\n arr[j] = temp;\r\n }\r\n }\r\n \/\/ \u6267\u884c\u5b8c\u4e0a\u9762\u5faa\u73af\u540e\uff0carr\u5df2\u7ecf\u662f\u5de6\u8fb9\u6bd4index\u5c0f\uff0c\u53f3\u8fb9\u6bd4index\u5927\u7684\u6570\u7ec4\u4e86\uff0c\u53ea\u662f\u57fa\u51c6\u6570\u4ecd\u5728\u57fa\u51c6\u4f4d\u7f6eleft\u5904\uff0c\u9700\u653e\u5230\u5b83\u5e94\u8be5\u5728\u7684\u4f4d\u7f6e\r\n if (j != left && arr[j] != arr[left]) {\r\n \/\/ j\u6700\u540e\u505c\u7559\u4f4d\u7f6e\u7684\u6570\uff0c\u80af\u5b9a\u662f\u4e00\u4e2a\u5c0f\u4e8e\u7b49\u4e8eindex\u7684\u503c\uff0c\u6240\u4ee5\u5982\u679c\u4e0d\u662f\u540c\u4e00\u4e2a\u4f4d\u7f6e\u7684\u8bdd\uff0c\u76f4\u63a5\u5c06\u4e8c\u8005\u8c03\u6362\u4e00\u4e0b\u4f4d\u7f6e\u5373\u53ef\r\n int temp = arr[j];\r\n arr[j] = arr[left];\r\n arr[left] = temp;\r\n }\r\n quickSort(arr, left, j-1); \/\/ \u5c06\u57fa\u51c6\u6570\u5de6\u8fb9\u6392\u5e8f\r\n quickSort(arr, j+1, right); \/\/ \u5c06\u57fa\u51c6\u6570\u53f3\u8fb9\u6392\u5e8f\r\n }\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
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