Java课程“新”得（六）改进版期中作业

import java.util.ArrayList;

import java.util.Collections;

import java.util.Random;

public class Game {

ArrayList choujiang;

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("电冰箱一台\n");

System.out.println("二等奖获得者：");

g.sj(2);

System.out.println("炒锅一个\n");

System.out.println("三等奖获得者：");

g.sj(10);

System.out.println("200元购物卡一张");

System.out.println("恭喜以上获奖者");

}
public void deal(){
if(choujiang == null){
choujiang = new ArrayList<Integer>();
for(int i=1;i<=2000;i++){
choujiang.add(i);
}
}
Collections.shuffle(choujiang);
}
public void sj(int n){
Random ran1 = new Random(2000);

for (int i = 0; i < n; i++) {
int index = ran1.nextInt(choujiang.size());
System.out.print(choujiang.get(index)+"\t");
choujiang.remove(index);

}

}

}