抽奖程序

抽奖程序
'package choujiang;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;

public class choujiang {

public static void main(String[] args) {
    ArrayList <Integer> number = new ArrayList<>();
    Random random = new Random();
    
    for(int i=0;i<1000;i++){
        int A=i;
        number.add(A);
    }
    Collections.shuffle(number);
    int A = random.nextInt(1000);
    System.out.println("一等奖" +number.get(A)+"\n" );
    number.remove(A);
    for(int i=1;i<3;i++){
        Collections.shuffle(number);
        int B = random.nextInt(1000-i);
        System.out.println("二等奖" +number.get(B)+"\n");
        number.remove(B);
    }

    for(int i=1;i<4;i++){
        Collections.shuffle(number);
        int C = random.nextInt(997-i);
        System.out.println("三等奖" +number.get(C)+"\n");
        
    }


}

}
'
截图

来源：https://www.cnblogs.com/zjx888/p/5484425.html