一、需求描述

完成斗地主游戏的案例开发。

业务：总共有54张牌；

点数：3、4、5、6、7、8、9、10、J、Q、K、A、2

花色：黑桃、红桃、方片、梅花

大小王：大王、小王

点数分别要组合4种花色，大小王各一张。

斗地主：每次发出51张牌，剩下3张作为底牌。

二、代码实现

2.1 Card类

package com.itheima.doudizhu;

public class Card {
    private String number;//点数
    private String color; //花色
    private int size;//每张牌大小

    public Card() {
    }

    public Card(String number, String color, int size) {
        this.number = number;
        this.color = color;
        this.size = size;
    }

    public String getNumber() {
        return number;
    }

    public void setNumber(String number) {
        this.number = number;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public int getSize() {
        return size;
    }

    public void setSize(int size) {
        this.size = size;
    }

    @Override
    public String toString() {
        return number + color;
    }
}

2.2 Room类

package com.itheima.doudizhu;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class Room {
    //房间必须有一张牌
    private List<Card> allCards = new ArrayList<>();

    //每次进入房间，牌都是洗好的，所以在构造函数中实现
    public Room() {
        //1、整理好牌
        //2、点数和花色都确定了，使用数组存储
        String[] numbers = {"3","4","5","6","7","8","9","10","J","Q","K","A","2"};
        //使用数组存储花色
        String[] colors = {"♠","♥","♣","♦"};

        //代表每个点数的大小
        int size = 0;

        //3、获得每张牌对象
        for (String number : numbers) {
            size++;
            for (String color : colors) {
                Card c = new Card(number,color,size);
                //将每张牌存入到整副牌中
                allCards.add(c);
            }
        }

        //存入小王和大王
        Card c1 = new Card("","🃏",++size);
        Card c2 = new Card("","🃏",++size);

        //得到完整的一副牌
        Collections.addAll(allCards,c1,c2);

        //打印牌
        System.out.println("新牌:" + allCards);
    }

    //游戏启动
    public void start() {
        //洗牌
        Collections.shuffle(allCards);
        System.out.println("洗牌后：" + allCards);

        //给3个玩家发牌
        List<Card> player1 = new ArrayList<>();
        List<Card> player2 = new ArrayList<>();
        List<Card> player3 = new ArrayList<>();

        //依次发出51张牌，然后留3张牌作为底牌
        for (int i = 0; i < allCards.size() - 3; i++) {
            Card c = allCards.get(i);
            if (i % 3 ==0) {
                player1.add(c);
            } else if (i % 3 == 1) {
                player2.add(c);
            } else if (i % 3 == 2) {
                player3.add(c);
            }
        }

        //对玩家的牌进行排序
        SortCard(player1);
        SortCard(player2);
        SortCard(player3);

        //看牌
        System.out.println("1号玩家：" + player1);
        System.out.println("2号玩家：" + player2);
        System.out.println("3号玩家：" + player3);

        //记录底牌
        List<Card> threeCard =  allCards.subList(allCards.size() - 3,allCards.size());
        System.out.println("底牌：" + threeCard);

        player2.addAll(threeCard);
        SortCard(player2);
        System.out.println("2号玩家抢到地主后：" + player2);
    }

    //对牌进行排序
    private void SortCard(List<Card> cards) {
        Collections.sort(cards, new Comparator<Card>() {
            @Override
            public int compare(Card o1, Card o2) {
                return o1.getSize() - o2.getSize();//升序排序
            }
        });
    }
}

2.3 Demo类

package com.itheima.doudizhu;

public class GameDemo {
    public static void main(String[] args) {
        //进入房间
        Room room = new Room();

        //游戏启动
        room.start();
    }
}

三、运行结果