Java打乱数组元素

package com.mohuanan.exercise;

import java.util.Random;

//打乱数组的元素
public class ExerciseDemo05 {
    public static void main(String[] args) {
        int[] arr = {1,2,3,4,5};
        Random r = new Random();

        for (int i = 0; i < arr.length; i++) {
            int randomIndex = r.nextInt(5);
            int temp;//临时变量
            temp = arr[randomIndex];
            arr[randomIndex] = arr[i];
            arr[i] = temp;
        }
        //遍历数组,并输出

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

输出的结果: