Java使用HashMap映射实现消费抽奖功能

import java.util.Random;


import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

class Awards {
    private String name;
    private int count;

    public Awards() {
    }

    public Awards(String name, int count) {
        this.name = name;
        this.count = count;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }
}

class DrawReward {
    private Map<Integer,Awards> rwdPool=null;

    public DrawReward(){
        this.rwdPool=new HashMap<Integer,Awards>();
        rwdPool.put(0,new Awards("阳光普照奖：家庭大礼包",100));
        rwdPool.put(1,new Awards("一等奖：华为Mate X",4));
        rwdPool.put(2,new Awards("二等奖：格力吸尘器",6));
        rwdPool.put(3,new Awards("特等奖：￥5000",1));
    }

    public boolean hasAward(int rdkey){
        Awards awards = this.rwdPool.get(rdkey);
        if(awards.getCount()==0) return false;
        else return true;
    }

    public void draward(int rdKey) {
        Awards aw = this.rwdPool.get(rdKey);
        System.out.println("抽奖结果："+aw.getName());
        aw.setCount(aw.getCount()-1);
    }

    public void showPool(){
        Iterator<Awards> it;
        it = rwdPool.values().iterator();
        while(it.hasNext()){
            Awards aw = it.next();
            System.out.println(aw.getName()+"；剩余奖项数量："+aw.getCount());
        }
    }
}

public class MainClass {
    public static void main(String[] args) {
        DrawReward draw = new DrawReward();
        for(int i=0;i<10;i++){
            Random rd = new Random();
            int rdKey = rd.nextInt(4);
            if(draw.hasAward(rdKey)) {
                draw.draward(rdKey);
            } else {
                i--;
            }
        }

        draw.showPool();
    }
}