Question

我正在尝试创建二十一点游戏。游戏本身非常简单（至少是我的版本）。玩家从混洗的牌组中抽出一张牌，并计算已抽出的牌的总和。我有一个卡片类型为String的卡片组，这对我来说是个大问题。我不知道如何计算总和，因为它们属于String类型。您对我的工作有任何指导方针吗？我发现的唯一解决方案确实很糟糕，那就是将卡与字符串进行比较并为其赋值。例如，drawnCard.equals("Four of hearts") = "4";

    public class Player {


    private String nickName;
    private int playerNumOfCards;
    ArrayList<Card> playerHand = new ArrayList<>();


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

    public String getNickName() {
        return nickName;
    }

    public void addCard(Card aCard){
        playerHand.add(aCard);
        this.playerNumOfCards++;

    }

    public void getHandSum(){

    }

    public void getPlayerHand(){
        for(Card cards: playerHand){
            System.out.println(cards.toString());
        }
    }


  }

    public class DeckOfCards {

    private Card[] deck;
    private static final Random random = new Random();

    private int currentCard; //index of next Card to be deal (0-51)
    private static int NUMBER_OF_CARDS = 52; //Constant number of cards

    public DeckOfCards(){

        String [] faces = {"Ace", "Deuce", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Jack","Queen", "King"};
        String [] suits = {"Hearts", "Diamonds", "Clubs", "Spades"};

        deck = new Card [NUMBER_OF_CARDS]; // create array with Cards (52)
        currentCard = 0;

        //Populate deck with Cards
        for(int count = 0; count < deck.length; count++)
            deck [count] = new Card(faces [count % 13], suits [count / 13]);
    }

    public void shuffleDeck(){
        currentCard = 0;

        for (int first = 0; first < deck.length; first++){

            int second = random.nextInt(NUMBER_OF_CARDS); //Select a random card from number 0-51 (Number_of_cards)

            //Loops through all the cards and swaps it with the "Second" card which is randomly chosen card from hte same list.
            Card temp = deck[first];
            deck [first] = deck [second];
            deck [second] = temp;
        }
    }

    public void getCardDeck(){
        int start = 1;
        for(Card k : deck) {
            System.out.println("" + start + "/52 " + k);
            start++;
        }
    }

    public Card dealNextCard(){

        //Get the top card
        Card topCard = this.deck[0];

        //shift all the subsequent cards to the left by one index
        for(int currentCard = 1; currentCard < NUMBER_OF_CARDS; currentCard ++){
            this.deck[currentCard-1] = this.deck[currentCard];
        }
        this.deck[NUMBER_OF_CARDS-1] = null;

        //decrement the number of cards in our deck
        this.NUMBER_OF_CARDS--;

        return topCard;
    }

}

    public class Card {
    private String face; //Face of card, i.e "King" & "Queen"
    private String suit; //Suit of card, i.e "Hearts" & "diamonds"

    public Card (String cardFace, String cardSuit){ //Constructor which initializes card's face and suit
        this.face = cardFace;
        this.suit = cardSuit;
    }

    public String toString(){ //return String representation of Card
        return face + " of " + suit;
    }
}

 public class BlackJackGame {

    public static void main(String[] args) {

        DeckOfCards deck1 = new DeckOfCards();
        Player player1 = new Player("mille");
        deck1.shuffleDeck();

    }
}

Answer 1

创建一个代表Face的枚举

enum Face {
    Ace(number), //I don't know what number is for Ace and others.
    Deuce(number),
    Three(3),
    Four(4),
    Five(5),
    Six(6),
    Seven(7),
    Eight(8),
    Nine(9),
    Ten(10),
    Jack(number),
    Queen(number),
    King(number);

    private final int number;

    Faces(int number) {
        this.number = number;
    }

    public int getNumber() {
        return number;
    }
}

将面孔类型从“字符串”更改为“面孔”。

class Card {

    private Face face;
    private String suit;

    public Card (Face cardFace, String cardSuit){card's face and suit
        this.face = cardFace;
        this.suit = cardSuit;
    }

    public String toString(){
        return face + " of " + suit;
    }

    public int getNumber() {
        return face.getNumber();
    }
}

添加一种方法来从卡类中获取面部编号，然后相应地使用它。您还需要更改其他部分或项目，但我将留给您自己做。

也建议对西装使用枚举。

Answer 2

我在这里看不到卡片组列表，但是如果您的卡片字符串始终遵循相同的命名约定（即“四心”），则可以通过将每个字符串用“”空格分开来使您的工作更加轻松然后比较字符串中的第一个单词以获取数字（或对应的10个国王/女王等）。

 String cardName = "four of hearts" (or whatever the variable name is);
   String[] parts = string.split(" ");
   String number = parts[0];

因此，数字将仅等于“四”，而不必比较“四心”以返回数字4。

希望有帮助

计算cardSum（字符串的手）

2 个答案: