java实现数组随机重新排列

java实现数组随机重新排列

public class RandomSortTest {private int[]arr = {1,2,3,4,5,6,7,8};private static final int SIZE = 8;Random random = new Random();@Test//重新排列public void sort(){printArr();for(int i=0;i<SIZE;i++){int p = random.nextInt(i+1);System.out.println("i==="+i+"p==="+p);int tmp = arr[i];arr[i] = arr[p];arr[p] = tmp;}printArr();//1 2 4 8 5 3 7 6 //4 1 8 7 2 6 5 3 //1 8 2 3 5 4 6 7 //5 7 8 3 4 2 6 1}@Test//打印public void printArr(){for(int i=0;i<SIZE;i++){System.out.print(arr[i]+" ");}}}