java - 无法将面板重置为初始状态

Question

Play Again 按钮有问题，该按钮会将面板重置为 initial 状态。

Play Again 按钮应该重置面板，它会重新调整 gameList，但不会重置面板，这意味着所有按钮都会保留并丢失 ActionListener 函数。

这是我的程序:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import static java.util.Collections.*;

public class MemoryGame extends JFrame
{
    private JButton exitButton, replayButton;
    private JButton[] gameButton = new JButton[16];
    private ArrayList<Integer> gameList = new ArrayList<Integer>();
    private int counter = 0;
    private int[] buttonID = new int[2];
    private int[] buttonValue = new int[2];

    public static Point getCenterPosition(int frameWidth, int frameHeight)
    {
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        Dimension dimension = toolkit.getScreenSize();

        int x = (dimension.width - frameWidth)/2;
        int y = (dimension.height - frameHeight)/2;
        return (new Point(x,y));
    }

    public MemoryGame(String title)
    {
        super(title);

        initial();      
    }

    public void initial()
    {
        for (int i = 0; i < gameButton.length; i++) 
        {
            gameButton[i] = new JButton();
            gameButton[i].setFont(new Font("Serif", Font.BOLD, 28));
            gameButton[i].addActionListener(new ButtonListener());
        }
        exitButton = new JButton("Exit");
        replayButton = new JButton("Play Again");
        exitButton.addActionListener(new ButtonListener());
        replayButton.addActionListener(new ButtonListener());

        Panel gamePanel = new Panel();
        gamePanel.setLayout(new GridLayout(4, 4));
        for (int i = 0; i < gameButton.length; i++) 
        {
            gamePanel.add(gameButton[i]);
        }

        Panel buttonPanel = new Panel();
        buttonPanel.add(replayButton);
        buttonPanel.add(exitButton);
        buttonPanel.setLayout(new GridLayout(1, 0));

        add(gamePanel, BorderLayout.CENTER);
        add(buttonPanel, BorderLayout.SOUTH);

        for (int i = 0; i < 2; i++) 
        {
            for (int j = 1; j < (gameButton.length / 2) + 1; j++) 
            {
                gameList.add(j);
            }
        }
        shuffle(gameList);

        int newLine = 0;
        for (int a = 0; a < gameList.size(); a++) 
        {
            newLine++;
            System.out.print(" " + gameList.get(a));
            if (newLine == 4) 
            {
                System.out.println();
                newLine = 0;
            }
        }  
    }

    public boolean sameValues() 
    {
        if (buttonValue[0] == buttonValue[1]) 
        {
            return true;
        }
        return false;
    }

    private class ButtonListener implements ActionListener
    {
        public void actionPerformed(ActionEvent e) 
        {
            if (exitButton == e.getSource()) 
            {
                System.exit(0);
        }
        else if (replayButton == e.getSource()) 
        {
            initial();
        }
        for (int i = 0; i < gameButton.length; i++) 
        {
            if (gameButton[i] == e.getSource()) 
            {
                gameButton[i].setText("" + gameList.get(i));
                gameButton[i].setEnabled(false);
                counter++;

                if (counter == 3) 
                {
                    if (sameValues()) 
                    {
                        gameButton[buttonID[0]].setEnabled(false);
                        gameButton[buttonID[1]].setEnabled(false);
                    } 
                    else 
                    {
                        gameButton[buttonID[0]].setEnabled(true);
                        gameButton[buttonID[0]].setText("");
                        gameButton[buttonID[1]].setEnabled(true);
                        gameButton[buttonID[1]].setText("");
                    }
                    counter = 1;
                }
                if (counter == 1) 
                {
                    buttonID[0] = i;
                    buttonValue[0] = gameList.get(i);
                }
                if (counter == 2) 
                {
                    buttonID[1] = i;
                    buttonValue[1] = gameList.get(i);
                }
            }
        }
    }
    }

    public static void main(String[] args)
    {
        int x, y;
        int width = 500;
        int height = 500;

        Point position = getCenterPosition(width, height);
        x = position.x;
        y = position.y;

        JFrame frame = new MemoryGame("Memory Game");
        frame.setBounds(x, y, width, height);

        frame.setVisible(true);
        frame.setResizable(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }   
}

我该如何解决这个问题？

编辑:

另一个问题是在reset()之后，所有的按钮看起来都变成了sameValue()。我向按钮插入了一些音频，它发生在 ButtonListener 的情况下。这是部分:

if (counter == 3) 
    {
        if (sameValues()) 
        {
            gameButton[buttonID[0]].setEnabled(false);
            gameButton[buttonID[1]].setEnabled(false);
        } 

似乎满足条件sameValue()，但为什么呢？

最新更新:

问题已解决。最新代码未上传。

Answer 1

在 initial() 方法中，代码创建了一个新的 GUI。最好保留原始控件的句柄，并将它们重置为“开始游戏”状态和正确的值(数字)。

您当前方法的替代方法是为每个组件添加 remove() 和 add() new(不推荐)或使用 CardLayout(没有必要 - 请参阅第一个建议)。