Javaを使用して簡単なポーカーゲームを実装する

package poker;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.concurrent.Callable;
public class Game {
 public static void main(String[] args) {
        //定义5名玩家，使用List
        List<Player> playerList=new ArrayList<>();
        playerList.add(new Player("于美人"));
        playerList.add(new Player("小婷子"));
        playerList.add(new Player("小晨子"));
        playerList.add(new Player("小艾"));
        playerList.add(new Player("小珍子"));
        //定义扑克牌顺序表
        List<Card> cardList=new ArrayList<>();
        //初始化扑克牌
        initializeCards(cardList);
        System.out.println(cardList);
        //调用collections下的shuffle（洗牌）方法
        //进行洗牌
        Collections.shuffle(cardList);
        //System.out.println("抽牌前，牌组中的牌：");
        System.out.println(cardList);
        //发牌
        int n=2;//每名玩家发几张牌
        for(int i=0;i<n;i++){//一共发n轮牌
            for(Player player:playerList){//每名玩家一次抽牌
                Card card=cardList.remove(0);//从牌组中，抽一张牌出来
                player.cardList.add(card);//把这张牌放到当前玩家的手中
            }
        }
        System.out.println("现在牌组中剩余的牌：");
        System.out.println(cardList);
        System.out.println("交换牌之前：");
      for(Player player:playerList){
            System.out.printf("玩家[%s]的手牌是： %s%n",player.name,player.cardList);
        }
        //要找的牌，方法1
        Card toFoundCard=new Card("♠",1);
        for(Player player:playerList){
            for(Card card:player.cardList){
                //比较每张牌和要找的是否为同一张牌
                if(card.equals(toFoundCard)){
                    System.out.println(player.name+"获胜");
                    return;
                }
            }
        }
        System.out.println("无人获胜");
 }
 //要找的牌，方法2
        Card toFoundCard2=new Card("♠",1);
       for(Player player:playerList){
            if(player.cardList.contains(toFoundCard)) {
                System.out.println(player.name + "获胜");
                return;
            }
          }
    private static void initializeCards(List<Card> cards){
        for(String suit:new String[]{"♠","♥","♦","♣"}){
            for(int rank=1;rank<=5;rank++){
                Card card=new Card(suit,rank);
                //把扑克牌放入牌组中
                cards.add(card);
            }
        }
    }

//添加打印手牌的方法
public static void printPlayerHandCard(List<Player> playerList){
        for(Player player:playerList){
            System.out.printf("玩家[%s]的手牌是：%s%n",player.name,player.cardList);
        }
    }
    //集体实现交换的过程
         //交换牌
        //每名玩家随机抽取下家的一张牌
        Random random=new Random();
        for(int i=0;i<playerList.size();i++){
            Player currentPlayer=playerList.get(i);
            //下家就是按照前后关系的下一个，最后一名玩家抽取第0个
            Player nextPlayer=playerList.get(i!=playerList.size()-1?i+1:0);

            //要取的牌的下标
            int toDrawIndex=random.nextInt(nextPlayer.cardList.size());
            //取牌
            Card drawCard=nextPlayer.cardList.remove(toDrawIndex);
            //放入当前玩家的手中
            currentPlayer.cardList.add(drawCard);

        }
        System.out.println("交换牌之后：");
        printPlayerHandCard(playerList);

Card toFoundCard=new Card("♠",1);
        //已知于美人的下标为0
        Player 于美人=playerList.get(0);
        if(!于美人.cardList.contains(toFoundCard)){
            于美人.cardList.set(0,toFoundCard);
        }
        System.out.println("于美人第一次发功：");
        printPlayerHandCard(playerList);
        System.out.println("交换牌之后：");
        printPlayerHandCard(playerList);
        //此处交换牌过程省略。。。。。。。。。。。。。。
        if(!于美人.cardList.contains(toFoundCard)){
            于美人.cardList.set(0,toFoundCard);
        }
        System.out.println("于美人第二次发功：");
        printPlayerHandCard(playerList);

package poker;

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

public class Player {

    public List<Card> cardList=new ArrayList<>();
    public String name;
    public Player(String name){
        this.name=name;
    }
}

package poker;
import java.util.Objects;
public class Card {
    public String suit;//花色
    public int rank;//分值
    //构造方法
    public Card(String suit,int rank){
        this.rank=rank;
        this.suit =suit;
    }
    @Override
    public String toString() {
        return String.format("[%s%d]",suit,rank);
    }
    //重写比较相等的方法
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Card card = (Card) o;
        return rank == card.rank &&
                Objects.equals(suit, card.suit);
    }
}