Java實作簡單撲克牌游戲

撲克牌小游戲：
游戲玩法簡介：定義五個People在玩撲克牌游戲，玩法是5個人從一副沒有大小王的撲克牌中各抽取4張，牌的型別有四種：?，?，?，?，牌的大小為從1~13，（此處為了簡單，只取1 -5).

1.黑桃?A在哪名玩家手中，哪名玩家就獲勝，

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) {
        //定義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"));
        //定義撲克牌順序表
        List<Card> cardList=new ArrayList<>();
        //初始化撲克牌
        initializeCards(cardList);
        System.out.println(cardList);
        //呼叫collections下的shuffle（洗牌）方法
        //進行洗牌
        Collections.shuffle(cardList);
        //System.out.println("抽牌前，牌組中的牌：");
        System.out.println(cardList);
        //發牌
        int n=2;//每名玩家發幾張牌
        for(int i=0;i<n;i++){//一共發n輪牌
            for(Player player:playerList){//每名玩家一次抽牌
                Card card=cardList.remove(0);//從牌組中，抽一張牌出來
                player.cardList.add(card);//把這張牌放到當前玩家的手中
            }
        }
        System.out.println("現在牌組中剩余的牌：");
        System.out.println(cardList);
        System.out.println("交換牌之前：");
      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){
                //比較每張牌和要找的是否為同一張牌
                if(card.equals(toFoundCard)){
                    System.out.println(player.name+"獲勝");
                    return;
                }
            }
        }
        System.out.println("無人獲勝");
 }
 //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 + "獲勝");
                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);
                //把撲克牌放入牌組中
                cards.add(card);
            }
        }
    }

2.讓每名玩家，依次抽取他的下家的一張手牌，然后再找?A，找到?A就獲勝，

//添加列印手牌的方法
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);
        }
    }
    //集體實作交換的程序
         //交換牌
        //每名玩家隨機抽取下家的一張牌
        Random random=new Random();
        for(int i=0;i<playerList.size();i++){
            Player currentPlayer=playerList.get(i);
            //下家就是按照前后關系的下一個，最后一名玩家抽取第0個
            Player nextPlayer=playerList.get(i!=playerList.size()-1?i+1:0);

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

        }
        System.out.println("交換牌之后：");
        printPlayerHandCard(playerList);

3.于美人是賭神，她有變牌能力：她手中一旦沒有?A，她就可以把第一張牌變成?A，（交換牌之前，有機會變一次；交換牌之后，有機會變一次）

Card toFoundCard=new Card("?",1);
        //已知于美人的下標為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("于美人第一次發功：");
        printPlayerHandCard(playerList);
        System.out.println("交換牌之后：");
        printPlayerHandCard(playerList);
        //此處交換牌程序省略，，，，，，，，，，，，，，
        if(!于美人.cardList.contains(toFoundCard)){
            于美人.cardList.set(0,toFoundCard);
        }
        System.out.println("于美人第二次發功：");
        printPlayerHandCard(playerList);

定義玩家新的的一個類：

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;
    }
}

定義撲克牌的一個類：

package poker;
import java.util.Objects;
public class Card {
    public String suit;//花色
    public int rank;//分值
    //構造方法
    public Card(String suit,int rank){
        this.rank=rank;
        this.suit =suit;
    }
    @Override
    public String toString() {
        return String.format("[%s%d]",suit,rank);
    }
    //重寫比較相等的方法
    @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);
    }
}

注意：（1）要重新定義比較相等方法的重寫，
（2）注意foreach 方法的寫法，