我如何正确地实例化一个可以同时容纳玩家和发牌者的数组列表？

Question

我正在为我的APCS班级用Java制作一个多人二十一点游戏。我需要能够在一个数组列表中存储玩家和发牌者。实例化数组列表的正确方法是什么？下面是问题所在的类。

package BlackJack;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;
import static java.lang.Character.*;
import static java.lang.System.*;
import javax.swing.JPanel;
import java.util.ArrayList;

import BlackJack.Card;
import BlackJack.BlackJackCard;
import BlackJack.Deck;
import BlackJack.AbstractPlayer;
import BlackJack.Player;
import BlackJack.Dealer;

public class TheMultiPlayerGame extends JPanel implements KeyListener {
    ArrayList<Object> Ai = new ArrayList<Object>(4);
    private Dealer dealer = new Dealer();
    private Player[] playa = new Player[3];

    private Player player;
    private boolean start;
    private boolean hit;
    private boolean finish;
    private boolean show;
    private Font font;
    int playerTotal = 0;
    int dealerTotal = 0;
    int playerWinTotal = 0;
    int dealerWinTotal = 0;
    String j = "";
    String p = "";

    public TheMultiPlayerGame() {
        setBackground(Color.WHITE);
        font = new Font("TAHOMA", Font.BOLD, 12);
        this.addKeyListener(this);
        dealer = new Dealer();
        Ai.set(1, playa[0]);
        Ai.set(2, playa[1]);
        Ai.set(3, playa[2]);
        Ai.set(0, dealer);
    }

    public void paintComponent(Graphics window) {
        super.paintComponent(window);

        window.setColor(Color.blue);
        window.setFont(font);
        window.drawString("BlackJack GUI", 25, 50);
        window.drawString("PRESS B to start/restart the game.", 25, 100);
        window.drawString("PRESS H to hit - PLAYER", 325, 100);
        window.drawString("PRESS F to finish(DEALER hits).", 25, 130);
        window.drawString("PRESS X to see the results.", 325, 130);
        window.drawString(j, 10, 530);
        window.drawString(p, 10, 90);
        window.drawString("Player WinCount = " + playerWinTotal, 600, 100);
        window.drawString("Dealer WinCount = " + dealerWinTotal, 600, 130);
        window.drawString("Dealer Score = " + dealerTotal, 600, 200);
        window.drawString("Player Score = " + playerTotal, 600, 250);
        Ai.set(1, playa[0]);
        Ai.set(2, playa[1]);
        Ai.set(3, playa[2]);
        Ai.set(0, dealer);

        if (start == true) {
            //reset the dealer and player hands
            dealer = new Dealer();
            player = new Player();
            dealer.shuffle();
            Ai.set(0, dealer);
            System.out.println(Ai.get(0).numCardsLeftInDeck());

            //add two cards to dealer and player
            for (int x = 1; x < Ai.size(); x++) {
                Ai.get(x).addCardToHand(Ai.get(0).deal());

                Ai.get(x).addCardToHand(Ai.get(0).deal());
            }
            playerTotal = player.getHandValue();
            dealerTotal = dealer.getHandValue();
            repaint();
            start = false;
        }
        else if (hit == true) {
            if (playerTotal < 21) {
                player.addCardToHand(dealer.deal());
                playerTotal = player.getHandValue();
                repaint();
            }
            hit = false;
        }
        else if (finish == true) {
            dealer.addCardToHand(dealer.deal());
            dealerTotal = dealer.getHandValue();
            finish = false;
            show = true;
        }

        if (show == true) {
            //determine who won the game
            dealerTotal = dealer.getHandValue();
            playerTotal = player.getHandValue();
            if (playerTotal > 21 && dealerTotal <= 21) {
                j = "\nDealer wins - Player busted! " + playerTotal + " : " + dealerTotal;
                dealerWinTotal++;
            }
            else if (playerTotal <= 21 && dealerTotal > 21) {
                j = "\nPlayer wins - Dealer busted! " + playerTotal + " : " + dealerTotal;
                playerWinTotal++;
            }
            else if (playerTotal > 21 && dealerTotal > 21) {
                j = "Both players bust!";
            }
            else if (playerTotal < dealerTotal) {
                j = "\nDealer has bigger hand value! " + playerTotal + " : " + dealerTotal;
                dealerWinTotal++;
            }
            else {
                j = "\nPlayer has bigger hand value! " + playerTotal + " : " + dealerTotal;
                playerWinTotal++;
            }
            repaint();
            show = false;
        }

        window.drawString("DEALER ", 50, 190);
        dealer.drawHand(window, 0, 190);

        window.drawString("PLAYER ", 50, 365);
        player.drawHand(window, 0, 365);
    }

    public void keyTyped(KeyEvent e) {
        if (e.getKeyChar() == 'b' || e.getKeyChar() == 'B') {
            start = true;
            repaint();
        }
        else if (e.getKeyChar() == 'h' || e.getKeyChar() == 'H') {
            hit = true;
            repaint();
        }
        else if (e.getKeyChar() == 'f' || e.getKeyChar() == 'F') {
            finish = true;
            repaint();
        }
        else if (e.getKeyChar() == 'x' || e.getKeyChar() == 'X') {
            show = true;
            repaint();
        }
    }

    public void keyReleased(KeyEvent e) {
    }

    public void keyPressed(KeyEvent e) {
    }
}

Answer 1

您当前的初始化将不起作用。

您可以将其更改为：

 Ai.add(dealer);
 Ai.add(playa[0]);
 Ai.add(playa[1]);
 Ai.add(playa[2]);

然而，如果交易者和玩家没有实现一个公共的接口或者共享一个公共的超类(除了Object之外)，我看不出把它们放在那个ArrayList中有什么意义。