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  • java第六次作业

    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.Random;
    import java.util.*;
    public class choujiang {
        private ArrayList<Integer> cards;

        public void deal(int num){
            if (cards==null){
                cards=new ArrayList<Integer>();
                for(num=1;num<=100;num++){

                    cards.add(num);
                }
            }
            Collections.shuffle(cards);
        }
        public void draw(){
           Random ra=new Random();
            int s =ra.nextInt(cards.size());
            System.out.println("一等奖:"+ cards.get(s));
            cards.remove(cards.get(s));
            Collections.shuffle(cards);
           
            for(int i=0;i<2;i++){
                int stwo=ra.nextInt(cards.size());
                System.out.println("二等奖:"+ cards.get(stwo));
                cards.remove(cards.get(stwo));
                }
            Collections.shuffle(cards);
                for(int j =0;j<3;j++){
                    int sthree =ra.nextInt(cards.size());
                    System.out.println("三等奖:"+cards.get(sthree));
                    cards.remove(cards.get(sthree));
                }

             }

        public static void main(String[] args) {
            // TODO Auto-generated method stub
            choujiang c = new choujiang();
            c.deal(0);
            c.draw();
        }
    }

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  • 原文地址:https://www.cnblogs.com/lkh960317/p/5498943.html
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