Java二十一点计分问题

Question

我在二十一点游戏中的得分出现问题。它可以找到正确的分数，但是当用户抽一张新卡时，它会错误地添加分数。

例如:原手牌是:4 和 5(所以得分 9)用户抽出 10。分数不再是 19，而是 19+9 或 28。

这是我的代码:评分方法:

public int getHandValue() {
    boolean ace = false;
    for (int i = 0; i < this.hand.size(); i++) {
        if (this.hand.get(i).getRank().value > 10) {
            points += 10;
        } else if (this.hand.get(i).getRank().value == 1) {
            ace = true;
        } else {
            points += this.hand.get(i).getRank().value;
        }
        if (ace == true && points + 11 <= 21) {
            points += 11;
        }

    }
    return points;
}

玩法:

public void play(Deck deck) {
    boolean isDone = false;
    if (this.getHandValue() > 21){
        System.out.println("You have busted!");
        isDone = true;
        this.lose();
    }
    takeCard(deck.drawCard());
    takeCard(deck.drawCard());
    System.out.println("Here are your cards and your score:");
    System.out.println(this.hand.toString());
    System.out.println("Score: " + getHandValue());
    ListItemInput hitOrPass = new ListItemInput();
    hitOrPass.add("h", "hit");
    hitOrPass.add("p", "pass");
    while (!isDone){
        System.out.println("Hit or pass?");
        hitOrPass.run();
        if (hitOrPass.getKey().equalsIgnoreCase("h")) {
            String result = "";
            this.takeCard(deck.drawCard());
            result += "You hand is now " + this.hand.toString() + "\n";
            result += "Your score is now " + this.getHandValue();
            System.out.println(result);
        } else {
            System.out.println("You have chosen to pass.");
            isDone = true;
        }
    }
}

Answer 1

每次调用方法时都会循环遍历手牌，因此在执行此操作之前应重置您的点数。否则点数增加2倍+手上额外的牌。在循环之前重置该值

public int getHandValue() {
    boolean ace = false;
    points = 0; //<--- reset the point total
    for (int i = 0; i < this.hand.size(); i++) {
        if (this.hand.get(i).getRank().value > 10) {
            points += 10;
        } else if (this.hand.get(i).getRank().value == 1) {
            ace = true;
        } else {
            points += this.hand.get(i).getRank().value;
        }
        if (ace == true && points + 11 <= 21) {
            points += 11;
        }

    }
    return points;