实现随机排名

import java.util.Random;
import java.util.Scanner;

public class test3 {
    public static void main(String[] args) {
        int[] codes=new int[5];
        Scanner sc=new Scanner(System.in);
        for (int i = 0; i < codes.length; i++) {
            System.out.println("请输入当前第"+(i+1)+"个数字");
            int code=sc.nextInt();
            codes[i]=code;
        }
//利用Java自带的函数Random生成随机数
        Random r=new Random();
        for (int i = 0; i < codes.length; i++) {
            int index=r.nextInt(codes.length);
//将随机数索引在数组中代表的数与循环中的i索引在数组中代表的数进行交换
            int temp=codes[index];
            codes[index]=codes[i];
            codes[i]=temp;
        }
        for (int i = 0; i < codes.length; i++) {
            System.out.println(codes[i]);
        }
    }
}