期中抽奖系统

import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
public class Game {

ArrayList<Integer> jiangquans;

public static void main(String[] args) {

// TODO Auto-generated method stub

    Game g = new Game();

    g.deal();

    System.out.println("一等奖获得者：");

    g.sj(1);

    System.out.println("奖品是iPhone6s一部\n");

    System.out.println("二等奖获得者：");

    g.sj(2);

    System.out.println("送奖金1000元\n");

    System.out.println("三等奖获得者：");

    g.sj(10);

    System.out.println("手机话费100元");

     }

private void sj(int i) {
// TODO Auto-generated method stub

}

public void deal(){

 if(jiangquans == null){

  jiangquans = new ArrayList<Integer>();

  for(int i=1;i<=2000;i++){

   jiangquans.add(i);

  }

 }

 Collections.shuffle(jiangquans);}

public void sj1(int n){

Random ran1 = new Random(2000);

        for (int i = 0; i < n; i++) {

 int index = ran1.nextInt(jiangquans.size());

    System.out.print(jiangquans.get(index)+"\t");

    jiangquans.remove(index);

           }

}

}

程序运行截图如下