用集合模拟斗地主洗牌发牌的过程，并将发的牌排序

package zbr;

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

class Card {

    //定义变量
    private String color;
    private String number;
    private int index;//记录牌的大小，便于发好牌后排序

    public Card() {
    }

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

    public int getIndex() {
        return index;
    }


    //显示牌的点数+花色
    @Override
    public String toString() {
        return this.color+this.number;
    }
}

public class CardDemo {

    //定义1个静态集合，用来存储54张牌
    public static final List<Card> CARD_LIST = new ArrayList<>();

    //制作扑克牌
    static{
        String[] colors = {"♠","♥","♦","♣"};

        String[] numbers = {"3","4","5","6","7","8","9","10","J","Q","K","A","2"};

        //添加2-A的不同花色的牌，并用index对每张牌进行编号记录，每张牌编号唯一，便于后面排序
        int index = 1;
        for (String number : numbers) {

            for (String color : colors) {
            
                CARD_LIST.add(new Card(color,number,index));
                index++;
            }
        }

        //添加大小王
        Collections.addAll(CARD_LIST,new Card("","🤡",53),new Card("","🃏",54));

    }

    public static void main(String[] args) {

        //定义3名玩家 和 1个存放三张地主牌的容器
        List<Card> player_1 = new ArrayList<>();
        List<Card> player_2 = new ArrayList<>();
        List<Card> player_3 = new ArrayList<>();
        List<Card> landLordCard = new ArrayList<>();

        //洗牌
        Collections.shuffle(CARD_LIST);

        //发牌，最后3张牌当作地主牌
        for (int i = 0; i < CARD_LIST.size(); ) {

            if (i>=0&&i<=50) {
                player_1.add(CARD_LIST.get(i++));
                player_2.add(CARD_LIST.get(i++));
                player_3.add(CARD_LIST.get(i++));
            } else{
                landLordCard.add(CARD_LIST.get(i++));
            }

        }

		//对发好的牌进行排序
        mySort(player_1);
        mySort(player_2);
        mySort(player_3);
        mySort(landLordCard);

		//输出排序后的牌
        System.out.println("player_1:"+player_1);
        System.out.println("player_2:"+player_2);
        System.out.println("player_3:"+player_3);
        System.out.println("landLordCard:"+landLordCard);
    }

	//定义牌的排序方法
    public static void mySort(List <Card> list) {

        Collections.sort(list, new Comparator<Card>() {
            @Override
            public int compare(Card o1, Card o2) {
                return o1.getIndex()-o2.getIndex();
            }
        });
    }
}