用java设计一个21点小游戏毕业答辩

好的，我可以为您提供一个基本的21点小游戏的Java代码实现。具体实现方式如下：

1.首先，我们需要定义一个Card类作为扑克牌，它具有点数和花色两种属性，代码如下：

public class Card {
    private int point; // 点数
    private String suit; // 花色

    public Card(int point, String suit) {
        this.point = point;
        this.suit = suit;
    }

    public int getPoint() {
        return point;
    }

    public String getSuit() {
        return suit;
    }
}

2.然后，我们需要设计一个Deck类，用于存储一副扑克牌。Deck类具有洗牌和发牌两种行为，代码如下：

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

public class Deck {
    private List<Card> cards;

    public Deck() {
        cards = new ArrayList<>();
        for (int i = 1; i <= 13; i++) {
            cards.add(new Card(i, "Spade"));
            cards.add(new Card(i, "Heart"));
            cards.add(new Card(i, "Diamond"));
            cards.add(new Card(i, "Club"));
        }
    }

    public void shuffle() {
        Collections.shuffle(cards);
    }

    public Card deal() {
        if (cards.isEmpty()) {
            return null;
        }
        return cards.remove(0);
    }
}

3.接下来，我们需要设计一个Player类，用于表示玩家，在游戏中具有抽牌和计算点数的功能，代码如下：

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

public class Player {
    private List<Card> hand;

    public Player() {
        hand = new ArrayList<>();
    }

    public void addCard(Card card) {
        hand.add(card);
    }

    public int getTotalPoint() {
        int total = 0;
        boolean hasAce = false;
        for (Card card : hand) {
            if (card.getPoint() == 1) {
                hasAce = true;
            }
            total += Math.min(card.getPoint(), 10);
        }
        if (hasAce && total + 10 <= 21) {
            total += 10;
        }
        return total;
    }
}

4.最后，我们需要设计一个Game类，用于控制游戏流程和计算胜负。在Game类中，我们需要创建一副扑克牌和两个玩家对象，然后通过控制抽牌和计算点数的顺序来实现游戏的流程，代码如下：

import java.util.Scanner;

public class Game {
    private Deck deck;
    private Player player;
    private Player dealer;

    public Game() {
        deck = new Deck();
        player = new Player();
        dealer = new Player();
    }

    public void start() {
        deck.shuffle();
        player.addCard(deck.deal());
        dealer.addCard(deck.deal());
        player.addCard(deck.deal());
        dealer.addCard(deck.deal());

        System.out.println("Player: " + player.getTotalPoint());
        System.out.println("Dealer: " + dealer.getTotalPoint());

        while (true) {
            Scanner scanner = new Scanner(System.in);
            System.out.print("Do you want to hit or stand? ");
            String input = scanner.nextLine();
            if (input.equalsIgnoreCase("hit")) {
                player.addCard(deck.deal());
                System.out.println("Player: " + player.getTotalPoint());
                if (player.getTotalPoint() > 21) {
                    System.out.println("Player busts.");
                    System.out.println("Dealer wins.");
                    return;
                }
            } else if (input.equalsIgnoreCase("stand")) {
                break;
            } else {
                System.out.println("Invalid input. Please try again.");
            }
        }

        while (dealer.getTotalPoint() < 17) {
            dealer.addCard(deck.deal());
        }

        System.out.println("Player: " + player.getTotalPoint());
        System.out.println("Dealer: " + dealer.getTotalPoint());

        if (dealer.getTotalPoint() > 21) {
            System.out.println("Dealer busts.");
            System.out.println("Player wins.");
        } else if (player.getTotalPoint() > dealer.getTotalPoint()) {
            System.out.println("Player wins.");
        } else if (player.getTotalPoint() < dealer.getTotalPoint()) {
            System.out.println("Dealer wins.");
        } else {
            System.out.println("Push.");
        }
    }
}

以上就是一个基本的21点小游戏的Java代码实现。您可以根据自己的需要进行修改和扩展。