Question

这是我的甲板课程：

public class Deck {    
    ArrayList<Card> deck = new ArrayList<Card>();    
    public ArrayList<Card> get32Cards() {    
        deck.add(new Card(Suit.SPADES, Rank.JACK));
        deck.add(new Card(Suit.SPADES, Rank.KING));
        deck.add(new Card(Suit.SPADES, Rank.SEVEN));
        deck.add(new Card(Suit.SPADES, Rank.EIGHT));
        deck.add(new Card(Suit.SPADES, Rank.NINE));
        deck.add(new Card(Suit.SPADES, Rank.TEN));
        deck.add(new Card(Suit.SPADES, Rank.ACE));
        deck.add(new Card(Suit.SPADES, Rank.QUEEN));
        deck.add(new Card(Suit.HEARTS, Rank.JACK));
        deck.add(new Card(Suit.HEARTS, Rank.KING));
        deck.add(new Card(Suit.HEARTS, Rank.SEVEN));
        deck.add(new Card(Suit.HEARTS, Rank.EIGHT));
        deck.add(new Card(Suit.HEARTS, Rank.NINE));
        deck.add(new Card(Suit.HEARTS, Rank.TEN));
        deck.add(new Card(Suit.HEARTS, Rank.ACE));
        deck.add(new Card(Suit.HEARTS, Rank.QUEEN));
        deck.add(new Card(Suit.CLUBS, Rank.JACK));
        deck.add(new Card(Suit.CLUBS, Rank.KING));
        deck.add(new Card(Suit.CLUBS, Rank.SEVEN));
        deck.add(new Card(Suit.CLUBS, Rank.EIGHT));
        deck.add(new Card(Suit.CLUBS, Rank.NINE));
        deck.add(new Card(Suit.CLUBS, Rank.TEN));
        deck.add(new Card(Suit.CLUBS, Rank.ACE));
        deck.add(new Card(Suit.CLUBS, Rank.QUEEN));
        deck.add(new Card(Suit.DIAMONDS, Rank.JACK));
        deck.add(new Card(Suit.DIAMONDS, Rank.KING));
        deck.add(new Card(Suit.DIAMONDS, Rank.SEVEN));
        deck.add(new Card(Suit.DIAMONDS, Rank.EIGHT));
        deck.add(new Card(Suit.DIAMONDS, Rank.NINE));
        deck.add(new Card(Suit.DIAMONDS, Rank.TEN));
        deck.add(new Card(Suit.DIAMONDS, Rank.ACE));
        deck.add(new Card(Suit.DIAMONDS, Rank.QUEEN));

        Collections.shuffle(deck); //this shuffles the deck

        return deck;
    }
}

这是我的主要课程：

public class Game {    
    public static void main(String[] args) {
        ArrayList<Card> deck = new ArrayList<Card>();

        Deck getdeck = new Deck();
        deck = getdeck.get32Cards();

        for (Card info : deck) {
            System.out.println(info);
        }  
    }
}

我有一段代码，我认为它会起作用，但不确定如何实现它，或者它是否正确：

 public boolean giveFourCards(Card c) {
        for (int x = 1; x < 3; x++) {
            if (deck.contains(c)) {
                deck.remove(c);
                Hand1.add(c);
                return true;
            } else
                return false;
        }
        return false;    
    }

我想要复制＆＃39;套牌的前4个元素。 arraylist进入另一个名为＆＃39; hand1＆＃39;的arraylist，然后从＆＃39; deck＆＃39;中删除这4个元素。数组列表。

Answer 1

您的giveFourCards（）方法接收一个Card实例作为参数：为什么？

你的for循环似乎错了：应该是for (int x=0; x<4; x++) {。

您似乎已经复制了一些您尚未理解的代码块。

据我所知，你的问题应该是：

public boolean giveFourCards() {
    for (int x=0; x<4; x++) {
        if (!deck.isEmpty()) {
            Hand1.add(deck.removeFirst());
        } else {
            return false;
        }
    }
    return true;
}

Answer 2

如果你想从甲板上获得前4张牌，那么你可以

public ArrayList<Card> giveFourCards() {
       ArrayList<Card> hand=new ArrayList<Card>();
       for (int x = 0; x < 3; x++) {
            hand.add(deck.get(x));  
       }
    return hand;

  }

Answer 3

两个问题：

您在第一次迭代后返回
你正在考试的是一张卡片在牌组中吗？

这可能会解决问题：

public giveFourCards(Hand h) {
  for (int x = 0; x < 3; x++) {
    h.add(deck.remove(0)); // push the removed card into the hand
  }
}

如何将一个arraylist的前四个元素移动到另一个arraylist？

3 个答案: