打乱数组中全部数据顺序

import java.util.Random;

public class ArrayTest9 {
    public static void main(String[] args) {
        //打乱数组中全部数据顺序
        //扫描数组,把扫描到的和数组的随机索引交换
        int[] arr = {1,2,3,4,5};
        Random r = new Random();
        for (int i = 0; i < arr.length; i++) {
            int randomIndex = r.nextInt(arr.length);
            int temp;
            temp = arr[i];
            arr[i] = arr[randomIndex];
            arr[randomIndex] = temp;

        }

        for (int i = 0; i < arr.length; i++) {
            System.out.print(arr[i] + " ");

        }

    }
}