我如何申报方块花色和红心花色？

Question

好的，在下面的代码中我想声明 "Diamonds" 和 "Hearts" 是红色的。

代码在这里

if (card.getCardFace() == || card.getCardFace() == )
            g.setColor(Color.red);
         else
           g.setColor(Color.black);

我想知道如果我在我的卡片中将它们声明为字符 class，我该如何做到这一点。我必须更改它吗？

卡片Class

// Instance Data - all things common to all cards
private String cardFace; // king, q, j, 10 - 2, A
private int faceValue; // numberic value of the card
private char cardSuit; // hold suit of the card
private char suits[] = {(char)(003), (char)(004), (char)(005), (char)(006)};

// Constructor
public PlayingCard(int value, int suit)
{
    faceValue = value;
    setFace();
    setSuit(suit);
}

// helper setFace()
public void setFace()
{
    switch(faceValue)
    {
        case 1:
            cardFace = "A";
            faceValue = 14;
            break;
        case 11:
            cardFace = "J";
            break;
        case 12:
            cardFace = "Q";
            break;
        case 0:
            cardFace = "K";
            faceValue = 13;
            break;
        default:
            cardFace = ("" + faceValue);
    }
}

public void setSuit(int suit) // suit num between 0 and 3
{
    cardSuit = suits[suit];
}

// other helpers
public int getFaceValue()
{
    return faceValue;
}
public String getCardFace()
{
    return cardFace;
}

public String toString()
{
    return (cardFace + cardSuit);
}
}

（如果您需要更多代码，也请告诉我）

Answer 1

您应该使用 Enums 来定义等级和花色的类型，例如：

public static enum Suit {
    CLUB, DIAMOND, SPADE, HEART
}

public static enum Rank {
    TWO("2"), THREE("3"), FOUR("4"), FIVE("5"), SIX("6"), SEVEN("7"), 
    EIGHT("8"), NINE("9"), TEN("10"), JACK("J"), QUEEN("Q"), KING("K"), 
    ACE("A");

    private final String symbol;

    Rank(String symbol) {
        this.symbol = symbol;
    }

    public String getSymbol() {
        return symbol;
    }
}

---

class Card {
    Suit suit;
    Rank rank;
}

然后比较值：

if (card.suit == Suit.DIAMONDS || card.suit == Suit.HEARTH) {
    color = Color.RED;
} else {
    color = Color.BLACK;
}

或者将颜色定义为 Suit 的属性，然后只需使用：

color = card.suit.getColor();

我如何申报方块花色和红心花色？

How can I declare the suits Diamond and Hearts?

java

blackjack