归并排序的实现

import java.util.Arrays;

public class MergeSort {

    public static void main(String[] args) {
        int[] array = new int[6];
        for (int i = 0; i < 6; i++) {
            array[i] = (int) (Math.random() * 20);
        }
        System.out.println("待排序的数据为：" + Arrays.toString(array));
        int[] temp = new int[array.length];
        mergeSort(array, 0, array.length - 1, temp);
        System.out.println("排序过后的数据为：" + Arrays.toString(array));
    }

    public static void mergeSort(int[] array, int left, int right, int temp[]) {
        if (left < right) {
            int mid = (left + right) / 2;
            mergeSort(array, left, mid, temp);
            mergeSort(array, mid + 1, right, temp);
            merge(array, left, mid, right, temp);
        }
    }

    public static void merge(int[] array, int left, int mid, int right, int[] temp) {
        int i = left;
        int j = mid + 1;
        int t = 0;
        while (i <= mid && j <= right) {
            if (array[i] < array[j]) {
                temp[t++] = array[i++];
            } else {
                temp[t++] = array[j++];
            }
        }
        while (i <= mid) {
            temp[t++] = array[i++];
        }
        while (j <= right) {
            temp[t++] = array[j++];
        }
        t = 0;
        int index = left;
        while (index <= right) {
            array[index++] = temp[t++];
        }
    }
}

来源：CSDN

作者：啥也不会~~~

链接：https://blog.csdn.net/ytc958374686/article/details/103532782