java - 如何让不同类中的两个方法在继续执行之前等待？

Question

我有两个类(class)，BlackJack和BlackJackPane , BlackJack有一个名为 dealCards() 的方法它给出了一个名为 Player 的类一个Card从第一个 Player 开始循环到最后Player两次就像真正的二十一点游戏一样，每个玩家一次发一张牌。

BlackJackPane是一个包含 JButton 和 JLabels 的 JFrame。 JButton deal单击时有 .actionCommand("deal")和一个ActionListener使用调用实例变量 blackjack 的 Lambda 表达式在BlackJackPane发牌，blackjack.dealCards() 。 ActionListener还决定了常规 52 张牌组中的哪种牌 Player被处理以显示正确的Card Player有。

我更喜欢 dealCards() BlackJack中的方法通过 Card 后等待到 Player然而，对于要在 JFrame 中创建并显示的 JLabel，我不知道如何跨类进行此工作。我愿意接受其他创意选项或有关如何改进我的代码的技巧。

我试图将类封装起来，并将 I/O 限制在 BlackJackPane 中。 .

这是我的类(class)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);
           }
       }
   }
}

这是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

您可以重新定义 dealCards 方法，以便在发完每张牌后调用一些回调。

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

然后用类似的东西调用它:

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

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

我不能说这是最面向对象的方法，而且它没有很好地分离状态和 UI。但它应该做你想做的事。

(注意:这不是进行代码审查的地方，因此我拒绝提供有关“如何改进代码”的进一步建议。)