一、问题

我们需要一副完整的扑克牌，除去大小王一共52张牌，参与游戏的玩家共3名，在洗牌后分发每名玩家5张扑克牌。
在这里插入图片描述

二、创建一个Poker类

描述扑克牌的属性为花色和数字，我们对其进行封装，再重写 toString方法

public class Poker {
    private String suit;//花色
    private int rank;//数字

    public Poker(String suit, int rank) {
        this.suit = suit;
        this.rank = rank;
    }

    @Override
    public String toString() {
        return "{"+suit+" "+rank+"}";
    }

    public String getSuit() {
        return suit;
    }

    public void setSuit(String suit) {
        this.suit = suit;
    }

    public int getRank() {
        return rank;
    }

    public void setRank(int rank) {
        this.rank = rank;
    }
}

三、完成游戏内容

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class Game {
    public static final String[] suits = {"♥", "♣", "♦", "♠"};

    public List<Poker> buyPokers() {
        List<Poker> pokers = new ArrayList<>();
        for (int i = 0; i < 4; i++) {
            for (int j = 1; j < 13; j++) {
                Poker poker = new Poker(suits[i], j);
                pokers.add(poker);
            }
        }
        return pokers;
    }
    public void shuffle(List<Poker> pokers){
        for (int i = pokers.size()-1; i > 0; i--) {
            Random random=new Random();
            int index=random.nextInt(i);
            swap(pokers,i,index);
        }
    }
    public void swap(List<Poker> pokers,int i,int index){
        Poker tmp=pokers.get(i);
        pokers.set(i,pokers.get(index));
        pokers.set(index,tmp);
    }
    public List<List<Poker>> game(List<Poker> pokers){
        List<List<Poker>> hand=new ArrayList<>();
        List<Poker> hand1=new ArrayList<>();
        List<Poker> hand2=new ArrayList<>();
        List<Poker> hand3=new ArrayList<>();
        hand.add(hand1);
        hand.add(hand2);
        hand.add(hand3);
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 3; j++) {
                Poker removePoker=pokers.remove(0);
                hand.get(j).add(removePoker);
            }
        }
        return hand;
    }
}

四、测试

import java.util.ArrayList;
import java.util.List;

public class Test {
    public static void main(String[] args) {
        Game game=new Game();
        List<Poker> pokers=game.buyPokers();
        System.out.println(pokers);
        //洗牌
        game.shuffle(pokers);
        System.out.println("洗牌");
        System.out.println(pokers);
        //揭牌
        List<List<Poker>> List=game.game(pokers);
        System.out.println("揭牌");
        for (int i = 0; i < List.size(); i++) {
            System.out.println(List.get(i));
        }
    }
}

最后结果

[{♥ 1}, {♥ 2}, {♥ 3}, {♥ 4}, {♥ 5}, {♥ 6}, {♥ 7}, {♥ 8}, {♥ 9}, {♥ 10}, {♥ 11}, {♥ 12}, {♣ 1}, {♣ 2}, {♣ 3}, {♣ 4}, {♣ 5}, {♣ 6}, {♣ 7}, {♣ 8}, {♣ 9}, {♣ 10}, {♣ 11}, {♣ 12}, {♦ 1}, {♦ 2}, {♦ 3}, {♦ 4}, {♦ 5}, {♦ 6}, {♦ 7}, {♦ 8}, {♦ 9}, {♦ 10}, {♦ 11}, {♦ 12}, {♠ 1}, {♠ 2}, {♠ 3}, {♠ 4}, {♠ 5}, {♠ 6}, {♠ 7}, {♠ 8}, {♠ 9}, {♠ 10}, {♠ 11}, {♠ 12}]
洗牌
[{♠ 7}, {♦ 8}, {♦ 3}, {♠ 9}, {♥ 1}, {♠ 1}, {♠ 2}, {♦ 12}, {♦ 10}, {♦ 2}, {♣ 6}, {♣ 1}, {♠ 5}, {♦ 7}, {♦ 6}, {♣ 8}, {♣ 2}, {♦ 5}, {♠ 6}, {♥ 9}, {♥ 6}, {♠ 3}, {♦ 4}, {♥ 8}, {♣ 7}, {♣ 5}, {♥ 5}, {♦ 11}, {♠ 12}, {♥ 2}, {♣ 10}, {♥ 10}, {♥ 4}, {♣ 9}, {♠ 4}, {♦ 9}, {♠ 10}, {♦ 1}, {♥ 12}, {♣ 12}, {♥ 11}, {♠ 8}, {♣ 3}, {♣ 11}, {♣ 4}, {♥ 3}, {♥ 7}, {♠ 11}]
揭牌
[{♠ 7}, {♠ 9}, {♠ 2}, {♦ 2}, {♠ 5}]
[{♦ 8}, {♥ 1}, {♦ 12}, {♣ 6}, {♦ 7}]
[{♦ 3}, {♠ 1}, {♦ 10}, {♣ 1}, {♦ 6}]

五、总结

通过这个纸牌游戏的实现，我们可以学习到Java中类与对象的设计与使用，以及集合类的使用。购买纸牌、洗牌和揭牌等步骤涉及到了对象的创建和属性的操作，通过List集合可以方便地存储和管理多个纸牌对象。同时，通过使用Random类的nextInt()方法来实现随机交换纸牌的位置，实现洗牌的效果。最后，通过将揭牌结果存储在一个包含多个List集合的集合中，可以方便地得到每个玩家手中的纸牌，便于后续游戏的进行。