第六次Java作业抽奖程序

import java.util.ArrayList;
import java.util.Collections;
public class Cj {
     ArrayList<Integer> List;
    private int j;
    private int k;
public void deal(){
         if (List == null){
             List = new ArrayList<Integer>();
             for(int i=1;i<=200;i++){
                List.add(i);
             }
         }
      Collections.shuffle(List);
    
        }
    public void draw(){
        Random r = new Random();
        int index = r.nextInt(List.size());

        System.out.println("一等奖为:"+ List.get(index));
        List.remove(index);
        
    
        for(j=0;j<2;j++){
            int index1= r.nextInt(List.size());
        System.out.println("二等奖为："+List.get( index1));
       List.remove(index1);
        }  
    for(k=0;k<3;k++) {
        int index2 = r.nextInt(List.size());
           System.out.println("三等奖为："+List.get(index2));
           List.remove(index2);
       }
        
        
        

}
        
    public static void main(String[] args) {
        // TODO Auto-generated method stub

           Cj c = new Cj();
           c.deal();
           c.draw();
           

}
}