扑克牌发牌，排序的功能实现

洗牌的功能引入了Map集合，不然的话需要对花色定义大小，还要对牌的字数定义大小，因为JQK肯定和数字要比较，所以这样很麻烦而且我也不会，所以引入Map，用编号按照花色和字数进行全排序，也就是按照大小顺序全部放进Map中，以编号为key，以牌为Value，代码如下

package com.interview.test.com.interview.test.hashtest;

import java.util.*;

public class HashTest {
    public static void main(String[] args) {
        //定义花色
        ArrayList<String> flowers = new ArrayList<>();
        //定义数字
        ArrayList<String> nums = new ArrayList<>();
        //定义组合牌池
        ArrayList<String> cardPool = new ArrayList<>();

        //统一添加
        Collections.addAll(flowers,"♠","♥","♣","♦");
        Collections.addAll(nums,"A","2","3","4","5","6","7","8","9","10","J","Q","K");

        //先往牌池里面组合添加
        for(String flower : flowers){
            for(String num : nums){
                cardPool.add(flower+num);
            }
        }

        //真正的Map牌堆
        Map<Integer,String> map  = new HashMap<>();
        Integer count = 0;
        map.put(++count,"JOKER");
        map.put(++count,"joker");
        for(String s : cardPool){
            map.put(++count,s);
        }
        //获取key值集合，打乱排序，分给三个用户
        Set<Integer> keys = map.keySet();
        //因为打乱排序这个方法shuffle只能传List集合，所以要把set变成list
        ArrayList<Integer> keysList = new ArrayList<>();
        keysList.addAll(keys);

        //先定义三个用户的牌和底牌编号集合，再进行打乱排序分发
        ArrayList<Integer> gamer1Nums = new ArrayList<>();
        ArrayList<Integer> gamer2Nums = new ArrayList<>();
        ArrayList<Integer> gamer3Nums = new ArrayList<>();
        ArrayList<Integer> lastCardsNums = new ArrayList<>();

        Collections.shuffle(keysList);

        //进行分发
        for(int i = 0;i < keysList.size();i++){
            if(i>50){
                lastCardsNums.add(keysList.get(i));
            }
            else if(i%3==0){
                gamer1Nums.add(keysList.get(i));
            }else if(i%3==1){
                gamer2Nums.add(keysList.get(i));
            }else if(i%3==2){
                gamer3Nums.add(keysList.get(i));
            }
        }

        //给三个人的牌编号进行排序
        Collections.sort(gamer1Nums);
        Collections.sort(gamer2Nums);
        Collections.sort(gamer3Nums);

        //创建三个人和底牌的牌集合
        ArrayList<String> gamer1Cards = new ArrayList<>();
        ArrayList<String> gamer2Cards = new ArrayList<>();
        ArrayList<String> gamer3Cards = new ArrayList<>();
        ArrayList<String> lastCards = new ArrayList<>();

        //根据序号发牌
        for(Integer i : gamer1Nums){
            gamer1Cards.add(map.get(i));
        }
        for(Integer i : gamer2Nums){
            gamer2Cards.add(map.get(i));
        }
        for(Integer i : gamer3Nums){
            gamer3Cards.add(map.get(i));
        }
        for(Integer i : lastCardsNums){
            lastCards.add(map.get(i));
        }

        System.out.println(gamer1Cards);
        System.out.println(gamer2Cards);
        System.out.println(gamer3Cards);
        System.out.println(lastCards);

    }
}