二十一点游戏深度解析：Java编程实战

public class BlackjackGame { public static void main(String[] args) { // 初始化游戏环境，如卡牌集合、玩家等 // 开始游戏主循环 } }

// 定义卡牌类 public class Card { private String suit; // 花色 private String rank; // 点数

// 卡牌类的构造方法和行为方法（例如打印卡牌信息） }

// 定义玩家类 public class Player { private String name; private int score; // 玩家当前得分

// 玩家类的构造方法、行为方法（例如获取卡牌、显示当前得分） }

// 游戏主方法 public static void main(String[] args) { // 初始化卡牌 List deck = initializeDeck(); // 初始化玩家和庄家 Player dealer = new Player("Dealer"); Player player = new Player("Player"); // 游戏主循环 while (/* 游戏未结束的条件 */) { // 玩家下注 // 发牌给玩家和庄家 // 玩家回合：玩家决策、抽牌等 // 庄家回合：庄家决策、抽牌等 // 比较玩家和庄家得分，结算胜负 } // 游戏结束，输出结果 } // 初始化卡牌 private static List initializeDeck() { // 创建一副完整的52张卡牌 } }

private String suit; private String rank;

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

public String getSuit() { return suit; }

public String getRank() { return rank; }

public int getCardValue() { // 根据卡牌的点数返回相应的点值 }

@Override public String toString() { return "Card{" + "suit='" + suit + '\'' + ", rank='" + rank + '\'' + '}'; } }

private List cards;

public Deck() { cards = new ArrayList<>(); initialize(); }

private void initialize() { // 创建52张标准卡牌并加入cards列表 }

public Card dealCard() { if (cards.isEmpty()) { // 如果卡牌堆为空，则需要重新洗牌 shuffle(); } return cards.remove(cards.size() - 1); }

public void shuffle() { // 实现卡牌的洗牌算法，例如Fisher-Yates洗牌算法 } }

private String name; private int score;

public Player(String name) { this.name = name; this.score = 0; }

public String getName() { return name; }

public void addCard(Card card) { // 将卡牌添加到玩家手中，并更新玩家得分 }

// 玩家决策方法，如Hit或Stand }

// ...其他方法...

public void decide() { // 基于当前玩家得分和策略进行决策 // 比如总分小于21时选择Hit，否则选择Stand } }

private static final Logger logger = LoggerFactory.getLogger(Dealer.class);

public Dealer(String name) { super(name); }

public Card dealCard(Deck deck) { Card card = deck.drawCard(); logger.info("{} deals a card to themselves.", this.getName()); return card; }

public boolean shouldHit(Hand hand, int dealerScore) { // 实现庄家决策逻辑 // 这里仅作为示例，实际情况中应依据游戏规则实现 return dealerScore < 17; }

public boolean shouldStand(Hand hand, int dealerScore) { // 实现庄家决策逻辑 // 这里仅作为示例，实际情况中应依据游戏规则实现 return dealerScore >= 17; } }

private Scanner scanner = new Scanner(System.in); private static final Logger logger = LoggerFactory.getLogger(HumanPlayer.class);

public HumanPlayer(String name) { super(name); }

@Override public Action chooseAction(Hand hand, int score) { System.out.println("Current hand: " + hand); System.out.println("Your score: " + score); System.out.println("Do you want to (h)it or (s)tand?");

String input = scanner.nextLine().trim(); return switch (input) { case "h" -> Action.HIT; case "s" -> Action.STAND; default -> throw new IllegalArgumentException("Invalid action: " + input); }; } }

private final Dealer dealer; private final List players; private final Deck deck; private int currentPlayerIndex; private boolean gameOver = false;

public BlackjackGame(Dealer dealer, List players) { this.dealer = dealer; this.players = players; this.deck = new Deck(); }

public void startGame() { // 初始化牌堆并洗牌 deck.shuffle();

// 游戏主循环 while (!isGameOver()) { for (currentPlayerIndex = 0; currentPlayerIndex < players.size(); currentPlayerIndex++) { HumanPlayer currentPlayer = players.get(currentPlayerIndex); playRound(currentPlayer); if (isGameOver()) { break; } } playRound(dealer); if (isGameOver()) { break; } } }

private boolean isGameOver() { // 简单示例，实际游戏中需要更复杂的逻辑 return gameOver; }

private void playRound(Player player) { // 玩家回合的实现逻辑 // ... } }

// ...

public String determineWinner() { int dealerScore = calculateScore(dealer.getHand()); int highestPlayerScore = 0; String winner = "Dealer";

for (HumanPlayer player : players) { int playerScore = calculateScore(player.getHand()); if (playerScore > highestPlayerScore) { highestPlayerScore = playerScore; winner = player.getName(); } if (playerScore > dealerScore) { winner = player.getName(); break; } else if (playerScore < dealerScore) { continue; } // 在平局情况下，庄家胜 } if (highestPlayerScore > dealerScore) { winner = "Player"; } return "The winner is: " + winner; }

private int calculateScore(Hand hand) { int score = 0; int aceCount = 0; for (Card card : hand.getCards()) { if (card.getSuit() == Card.Suit.HEART || card.getSuit() == Card.Suit.DIAMOND) { score += 10; // 红心和方块代表10分 } else if (card.getValue() == Card.Value.ACE) { aceCount++; } else { score += card.getValue().getValue(); } } for (int i = 0; i < aceCount; i++) { if (score + 11 > 21) { score += 1; } else { score += 11; } } return score; }

// ... }

public class ConsoleGameInterface { private static Scanner scanner = new Scanner(System.in);

public static void main(String[] args) { boolean isPlaying = true; while (isPlaying) { System.out.println("欢迎来到二十一点游戏！

"); System.out.println("请输入命令：[开始] [退出]"); String command = scanner.nextLine(); switch (command) { case "开始": // 这里可以调用开始游戏的方法 break; case "退出": isPlaying = false; break; default: System.out.println("无效的命令，请重新输入！

"); break; } } System.out.println("游戏结束，再见！

"); } }

public class BlackjackGameGUI { public static void main(String[] args) { // 创建一个窗口 JFrame frame = new JFrame("二十一点游戏"); frame.setSize(800, 600); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(null);

// 创建面板和按钮并添加到窗口中 JPanel controlPanel = new JPanel(); JButton startButton = new JButton("开始游戏"); controlPanel.add(startButton); controlPanel.setBounds(10, 10, 300, 50);

// 显示窗口 frame.add(controlPanel); frame.setVisible(true); } }

System.out.println("你选择了击牌！

"); // 在此处添加实现击牌逻辑的代码 // ... // 如果玩家爆牌，则显示错误信息 if (player.getHandTotal() > 21) { System.out.println("爆牌了！

游戏结束！

"); } }

输入 [开始] 来发起一局新的游戏 输入 [查看规则] 来获取游戏规则介绍 游戏进行中: 输入 [击牌] 来选择获取一张新卡牌 输入 [停牌] 来结束当前回合 输入 [分牌] 来将一对卡牌分成两手游戏，前提是卡牌数值相同 输入 [加倍] 来加倍初始赌注，获得一张额外的卡牌后停牌 输入 [投降] 来放弃当前手牌，损失一半赌注 游戏结束: 输入 [新游戏] 来开始新一轮游戏 输入 [退出] 来结束游戏会话

A[当前手牌] -->|小于17| B[选择要牌] A -->|大于等于17| C[选择停牌] B --> D[抽到大牌] B --> E[抽到小牌] C --> F[结束游戏] D --> G[增加胜算] E --> H[减少胜算]

import static org.junit.jupiter.api.Assertions.*;

class BlackjackTest { @Test void testCardShuffling() { Card card = new Card(Suit.HEARTS, Rank.ACE); Deck deck = new Deck(); deck.shuffle(); assertNotEquals(card, deck.drawCard()); } @Test void testPlayerDecision() { Player player = new HumanPlayer("Test"); player.hit(); assertTrue(player.hasCard()); } @Test void testGameWinCondition() { BlackjackGame game = new BlackjackGame(); game.addPlayer(new Dealer()); game.addPlayer(new HumanPlayer("Alice")); game.play(); assertEquals(GameStatus.FINISHED, game.getStatus()); } }

private ArrayList cards; public Deck() { cards = new ArrayList<>(52); initializeCards(); } public void shuffle() { // 使用Fisher-Yates洗牌算法 Random r = new Random(); for(int i = cards.size() - 1; i > 0; i--) { int index = r.nextInt(i + 1); Card temp = cards.get(index); cards.set(index, cards.get(i)); cards.set(i, temp); } } }