Java里21点扑克牌游戏代码

以下是一个简单的 Java 21点扑克牌游戏代码，仅供参考：

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class TwentyOne {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        ArrayList<String> deck = new ArrayList<>();
        ArrayList<String> playerCards = new ArrayList<>();
        ArrayList<String> dealerCards = new ArrayList<>();
        int playerScore = 0;
        int dealerScore = 0;
        String[] suits = {"Hearts", "Diamonds", "Clubs", "Spades"};
        String[] ranks = {"Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King"};

        // Create deck
        for (int i = 0; i < suits.length; i++) {
            for (int j = 0; j < ranks.length; j++) {
                deck.add(ranks[j] + " of " + suits[i]);
            }
        }

        // Shuffle deck
        Collections.shuffle(deck);

        // Deal initial cards
        playerCards.add(deck.get(0));
        dealerCards.add(deck.get(1));
        playerCards.add(deck.get(2));
        dealerCards.add(deck.get(3));

        // Calculate initial scores
        playerScore = calculateScore(playerCards);
        dealerScore = calculateScore(dealerCards);

        System.out.println("Player's cards: " + playerCards);
        System.out.println("Dealer's cards: " + dealerCards.get(0) + ", [hidden]");

        // Player's turn
        while (playerScore < 21) {
            System.out.println("Do you want to hit or stand? (h/s)");
            String choice = input.nextLine();
            if (choice.equals("h")) {
                playerCards.add(deck.get(0));
                System.out.println("Player's cards: " + playerCards);
                playerScore = calculateScore(playerCards);
            } else {
                break;
            }
        }

        // Dealer's turn
        while (dealerScore < 17) {
            dealerCards.add(deck.get(0));
            dealerScore = calculateScore(dealerCards);
        }

        // Print final hands and scores
        System.out.println("Player's cards: " + playerCards);
        System.out.println("Dealer's cards: " + dealerCards);
        System.out.println("Player's score: " + playerScore);
        System.out.println("Dealer's score: " + dealerScore);

        // Determine winner
        if (playerScore > 21) {
            System.out.println("Player busts! Dealer wins.");
        } else if (dealerScore > 21) {
            System.out.println("Dealer busts! Player wins.");
        } else if (playerScore > dealerScore) {
            System.out.println("Player wins!");
        } else if (dealerScore > playerScore) {
            System.out.println("Dealer wins!");
        } else {
            System.out.println("It's a tie!");
        }
    }

    public static int calculateScore(ArrayList<String> hand) {
        int score = 0;
        int numAces = 0;
        for (String card : hand) {
            String rank = card.split(" ")[0];
            if (rank.equals("Ace")) {
                numAces++;
                score += 11;
            } else if (rank.equals("King") || rank.equals("Queen") || rank.equals("Jack")) {
                score += 10;
            } else {
                score += Integer.parseInt(rank);
            }
        }
        while (score > 21 && numAces > 0) {
            score -= 10;
            numAces--;
        }
        return score;
    }
}

这个程序首先创建了一副扑克牌，然后将其洗牌。接着，程序发出了两张牌给玩家和庄家。在玩家的回合中，他可以选择要牌或停牌。一旦玩家停牌或超过21点，庄家就会开始他的回合。庄家一直要牌，直到他的得分达到17或更高（如果他超过21点，他就破产了）。最后，程序会打印出玩家和庄家的手牌和得分，并确定赢家。