JAVA作业（6）

package zuoye;

import java.util.ArrayList;

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

public class choujiang {
    ArrayList<Integer> number;
    
    public ArrayList<Integer> deal(){
        if(number==null){
            number=new ArrayList<Integer>();
            for(int i=1;i<200;i++){
                number.add(i);
            }
        }
        Collections.shuffle(number);
        return (number);
    }
    
    public void display(){
        Random r=new Random();
        int a=r.nextInt(200);
        System.out.println("一等奖是："+number.get(a)+"号");
        number.remove(a);
        int k=199;
        Collections.shuffle(number);
        
        for(int j=1;j<=10;j++){
            a=r.nextInt(k);
            System.out.println("二等奖是："+number.get(a)+"号");
            number.remove(a);
            k--;
            
        }
    }
    
    
    
    public static void main(String[]args){
        choujiang g =new choujiang();
        g.deal();
        g.display();
    }

}