Java：
package com.example.threaddesign;
/**
* @author Dongguabai
* @date 2018/12/2 20:58
*/
public class ThreadTest {
public static void main(String[] args) {
Integer[] arr = {1, 2, 3, 4, 5};
int len = arr.length;
for (int i = 0; i < len; i++) {
int end = 4;
int index = (int) (Math.random() * (end + 1));
int t = arr[end];
arr[end] = arr[index];
arr[index] = t;
}
for (Integer integer : arr) {
System.out.println(integer);
}
}
}
JS：
