package draw;

import java.util.*;

public class Draw {
private ArrayList list;
public Draw() {
list= new ArrayList();
}
public void deal(int num) {
//向容器中添加奖券（使用循环）

for (int j = 0; j<= num ; j++) {
list.add(j);

}
//打乱顺序
Collections.shuffle( list);
}
public void drawLottery(int n){
Random ra = new Random();

for(int i=0;i<n;i++){
int index =ra.nextInt(list.size());
System.out.print(list.get(index)+"\t");
list.remove(index);
}
System.out.println();
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Draw c = new Draw();

c.deal(100);
System.out.println("————————一等奖————————");
c.drawLottery(3);
System.out.println("————————二等奖————————");
c.drawLottery(6);
System.out.println("————————三等奖————————");
c.drawLottery(9);
}

}