在繼續執行之前，如何在單獨的類中等待兩個方法？

Question

我有兩個班， BlackJack和BlackJackPane ， BlackJack有一個方法叫dealCards()這給了一個名為類Player一Card通過從第一循環Player到最后一個Player在大酒杯的一個真正的游戲，每個玩家發一張牌兩次像一次。

BlackJackPane是一個包含 JButton 和 JLabel 的 JFrame。 單擊時 JButton deal有一個.actionCommand("deal")和一個ActionListener和一個帶有 Lambda 表達式的ActionListener ，它調用BlackJackPane的實例變量blackjack來發牌， blackjack.dealCards() 。 ActionListener還確定從常規 52 張紙牌中發給Player的卡片類型，以顯示Player擁有的正確Card 。

我希望在將Card傳遞給Player以在 JFrame 中創建和顯示 JLabel 后，讓BlackJack的dealCards()方法等待，但是，我不知道如何跨類進行這項工作。 我願意接受其他有關如何改進代碼的創意選項或提示。

我試圖將類封裝起來，並將 I/O 限制在BlackJackPane 。

這是我的班級BlackJack

public class BlackJack
{

   private final Deck deck;
   private final ArrayList<Player> player;
   private final int numOfPlayers;

   public BlackJack(int players)
   {
       this.numOfPlayers = players + 1; // +1 for dealer, dealer is always first in arrayList
       this.deck = new Deck(Deck.TYPE[0]);
       this.player = new ArrayList();
       for (int i = 0; i < players + 1; i++)
       {
           this.player.add(new Player((i == 0))); //i == 0 is to say true to Player constructor that it is the dealer or cpu
       }
   }

   public void DealCards()
   {
       deck.shuffle();

       for (int i = 0; i < 2; i++)
       {
           for (int j = 0; j < player.size(); j++)
           {
               player.get(j).getHand().add(deck.getCard(0));
               deck.remove(0);
           }
       }
   }
}

這是BlackJackPane

    public class BlackJackPane extends JFrame
    {

       private BlackJack blackjack;
       private JLabel pokerTable;
       private JButton hit, stay, split, deal, hiddenCard;

       public BlackJackPane(BlackJack blackjack) throws IOException
       {
          this.blackjack = blackjack;
          display();
       }

       private void display() throws IOException
       {


        deal.addActionListener((event) ->
        {
            if (event.getActionCommand().equals("deal"))
            {
                blackjack.DealCards();

                for (int i = 0; i < 2; i++)
                {
                    for (int j = 0; j < blackjack.getNumOfPlayers(); j++)
                    {
                        if (blackjack.getPlayer(j).isCpu() && i != 1) //One card dealer has is face down
                        {

                        } else
                        {
                            if (blackjack.getPlayer(j).getHand().get(i).getFace() == 0) // face = 2
                            {
                                if (blackjack.getPlayer(j).getHand().get(i).getSuit() == 0) //clubs
                                {
                                   //Code to make and display the JLabel within the JFrame
                                } else if (blackjack.getPlayer(j).getHand().get(i).getSuit() == 1) //diamonds
                                {

                                } else if (blackjack.getPlayer(j).getHand().get(i).getSuit() == 2) //hearts
                                {

                                } else //spades
                                {

                                }
                            } else if() //and so on for 52 cards
                        }
                    }
                }
             }
        });
    }
}

Answer 1

您可以重新定義dealCards方法，以便在每張牌發完后調用一些回調。

public void dealCards(BiConsumer<Player, Card> onDealtCallback) {
    for (Player player : players) {
        Card dealt = this.getNextCardToDeal();
        onDealtCallback.accept(player, dealt);
    }
}

然后使用以下內容調用它：

public void callIt() {
    this.blackJack.dealCards(this::drawLabel);
}

public void drawLabel(Player player, Card card) {
    // TODO
}

我不能說這是最面向對象的方法，它沒有很好地分離狀態和 UI。 但它應該做你想做的事。

（注意：這不是代碼審查的地方，所以我拒絕提供關於“如何改進代碼”的進一步建議的沖動。）