第六次作业

package xq;

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

public class choujiang {
ArrayList cards;

public ArrayList deal(){

if(cards==null){
cards = new ArrayList();
for(int i =1;i<100;i++){
cards.add(i);
}

}
Collections.shuffle(cards);
return cards;
}

public void play(){
Random r = new Random();
int a = r.nextInt(100);
System.out.println("一等奖："+ cards.get(a)+"号");
cards.remove(a);
for(int i=1;i<=3;i++){
a = r.nextInt(100);
System.out.println("二等奖:"+cards.get(a)+"号");
cards.remove(a);
}
}

public static void main(String[] args) {
choujiang a=new choujiang();
a.deal();
a.play();
}