练习：斗地主游戏

 定义卡牌类

package com.zjm.homework;

public class Card {
    private String size; //数字
    private String color; //花色
    private int index;  //用来比较卡牌的大小

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

    public Card() {
    }

    public String getSize() {
        return size;
    }

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

    public String getColor() {
        return color;
    }

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

    public int getIndex() {
        return index;
    }

    public void setIndex(int index) {
        this.index = index;
    }

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

package com.zjm.homework;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
//开发一个斗地主游戏
public class GameDemo {
    //1、定义一个静态的集合存储54张牌对象
    public static List<Card> allCards = new ArrayList<>();

    //2.做牌:定义静态代码块初始化牌数据
    static {
        // 3、 定义点数:个数确定，类型确定，使用数组
        String[] sizes = {"3","4","5","6","7","8","9","10","J","Q","K","A","2"};
        // 4、 定义花色:花色确定，类型确定，使用数组
        String[] colors = {"♠", "♥", "♣", "◆"};
        // 5.组合点数和花色
        int index = 1;
        for (String size : sizes) {
            for (String color : colors) {
                // 6.封装成一个牌对象
                Card c = new Card(size,color,index++);
                // 7.存入到集合容器中去
                allCards.add(c);
            }
        }
        // 8.大小王存入到集合对象中去
//        allCards.add(new Card("","JOKER",++index));
//        allCards.add(new Card("","joker",++index));
        Collections.addAll(allCards,new Card("","joker",++index),new Card("","JOKER",++index));
        System.out.println("新牌："+allCards);
    }
    public static void main(String[] args) {
        //9.洗牌
        Collections.shuffle(allCards);
        System.out.println("洗牌后:"+allCards);
        // 10、发牌(定义三个玩家，每个玩家的牌也是一个集合容器)
        List<Card> xiaoming = new ArrayList<>();
        List<Card> xiaohong = new ArrayList<>();
        List<Card> xiaowang = new ArrayList<>();

        // 11、 开始发牌(从牌集合中发出51张牌给三个玩家，剩余3张作为底牌)
        for (int i = 0; i < allCards.size() -3 ; i++) {
            if (i % 3 == 0 ){
                xiaoming.add(allCards.get(i));
            }else if(i % 3 == 1){
                xiaohong.add(allCards.get(i));
            }else if(i % 3 == 2){
                xiaowang.add(allCards.get(i));
            }
        }

        // 12.拿到最后三张底牌(把最后三张牌藏取成一个子集合)
        List<Card> LastThreeCard = allCards.subList(allCards.size()-3, allCards.size() );

        // 13. 给玩家的牌排序(从小到大可以自己先试试怎么实现)
        sortCard(xiaoming);
        sortCard(xiaohong);
        sortCard(xiaowang);

        // 14. 输出玩家的牌
        System.out.println("小明：" + xiaoming);
        System.out.println("小红：" + xiaohong);
        System.out.println("小王：" + xiaowang);
        System.out.println("三张底牌：" + LastThreeCard);
    }

    private static void sortCard(List<Card> cards){
        Collections.sort(cards, new Comparator<Card>() {
            @Override
            public int compare(Card o1, Card o2) {
                return o1.getIndex() - o2.getIndex();
            }
        });
    }

}