您的问题涉及不同类的对象之间的通信，并且有几种方法可以实现此目的，但是最基本的方法是将一个类中的对象的方法调用到另一个类中。

首先让我们设置问题，…我创建了名为MyPanel2和Checkers2的类，以区分它们与您的类。

假设在MyPanel2中，我们有一个Checkers2字段和一个名为selected的布尔值字段，并将其设置为false：

private Checkers2 checkers;
private boolean selected = false;

以及适当的布尔型getter和setter：

public void setSelected(boolean selected) {
    this.selected = selected;
}

public boolean isSelected() {
    return selected;
}

并说在Checkers2类中，数组中包含10个MyPanel2实例，并且您希望用户能够“选择”该类的实例，但只允许选择其中的7个，并假设您想要要使用当前使用的设置，可以给主类一个方法public boolean isPanelDisabled()，并让MyPanel2类调用此方法来确定是否允许选择。因此，在MyPanel2中，您可以拥有一个类似以下内容的MouseListener：

@Override
public void mousePressed(MouseEvent e) {
    if (selected) {
        return;
    }

    // call the Checkers2 boolean method to check
    if (checkers.isPanelDisabled()) {
        setBackground(DISABLED_COLOR);
    } else {
        setBackground(SELECTED_COLOR);
        setSelected(true);
    }
}

在Checkers2 .isPanelDisabled()方法中，您将遍历MyPanel2实例数组以查看已选择了多少实例，类似的方法可能会起作用：

public boolean isPanelDisabled() {
    int count = 0;
    for (MyPanel2 panel2 : myPanels) {
        if (panel2.isSelected()) {
            count++;
        }
    }
    return count >= MAX_COUNT;
}

整个MCVE可测试代码如下所示：

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class Checkers2 extends JFrame {
    private static final int MAX_COUNT = 7;
    private final int ROWS = 2;
    private final int COLS = 5;
    private final int GAP = 2;
    private final int NUM = ROWS * COLS;
    private MyPanel2[] myPanels = new MyPanel2[NUM];

    public Checkers2() {
        super("Checkers");
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        JPanel gridPanel = new JPanel(new GridLayout(ROWS, COLS, 1, 1));
        gridPanel.setBackground(Color.BLACK);
        gridPanel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
        for (int i = 0; i < myPanels.length; i++) {
            MyPanel2 myPanel = new MyPanel2(this);
            gridPanel.add(myPanel);
            myPanels[i] = myPanel;
        }

        JButton resetButton = new JButton("Reset");
        resetButton.setMnemonic(KeyEvent.VK_R);
        resetButton.addActionListener(evt -> {
            for (MyPanel2 myPanel2 : myPanels) {
                myPanel2.reset();
            }
        });
        JButton exitButton = new JButton("Exit");
        exitButton.setMnemonic(KeyEvent.VK_X);
        exitButton.addActionListener(evt -> System.exit(0));

        JPanel buttonPanel = new JPanel();
        buttonPanel.add(resetButton);

        add(gridPanel);
        add(buttonPanel, BorderLayout.PAGE_END);

        pack();
        setLocationRelativeTo(null);
    }

    public boolean isPanelDisabled() {
        int count = 0;
        for (MyPanel2 panel2 : myPanels) {
            if (panel2.isSelected()) {
                count++;
            }
        }
        return count >= MAX_COUNT;
    }


    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            new Checkers2().setVisible(true);
        });
    }

}



class MyPanel2 extends JPanel {
    private static final int PREF_W = 200;
    private static final int PREF_H = PREF_W;
    private static final int GR = 240;
    public static final Color BASE_COLOR = new Color(GR, GR, GR);
    public static final Color DISABLED_COLOR = Color.CYAN;
    public static final Color SELECTED_COLOR = Color.BLACK;
    private Checkers2 checkers;
    private boolean selected = false;

    public MyPanel2(Checkers2 checkers) {
        setBackground(BASE_COLOR);
        this.checkers = checkers;
        setPreferredSize(new Dimension(PREF_W, PREF_H));
        addMouseListener(new MyMouse());
    }

    public void setSelected(boolean selected) {
        this.selected = selected;
    }

    public boolean isSelected() {
        return selected;
    }

    public void reset() {
        setBackground(BASE_COLOR);
        setSelected(false);
    }

    private class MyMouse extends MouseAdapter {
        @Override
        public void mousePressed(MouseEvent e) {
            if (selected) {
                return;
            }
            if (checkers.isPanelDisabled()) {
                setBackground(DISABLED_COLOR);
            } else {
                setBackground(SELECTED_COLOR);
                setSelected(true);
            }
        }
    }
}

另一个 选择是 从 MyPanel中提取所有逻辑，并将其放入主程序中，例如：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

@SuppressWarnings("serial")
public class Checkers3 extends JPanel {
    private static final int MAX_COUNT = 7;
    private final int ROWS = 2;
    private final int COLS = 5;
    private final int GAP = 2;
    private final int NUM = ROWS * COLS;
    private MyPanel3[] myPanels = new MyPanel3[NUM];

    public Checkers3() {
        JPanel gridPanel = new JPanel(new GridLayout(ROWS, COLS, 1, 1));
        gridPanel.setBackground(Color.BLACK);
        gridPanel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
        MyMouse myMouse = new MyMouse();
        for (int i = 0; i < myPanels.length; i++) {
            MyPanel3 myPanel = new MyPanel3();
            myPanel.addMouseListener(myMouse);
            gridPanel.add(myPanel);
            myPanels[i] = myPanel;
        }

        JButton resetButton = new JButton("Reset");
        resetButton.setMnemonic(KeyEvent.VK_R);
        resetButton.addActionListener(evt -> {
            for (MyPanel3 myPanel : myPanels) {
                myPanel.reset();
            }
        });
        JButton exitButton = new JButton("Exit");
        exitButton.setMnemonic(KeyEvent.VK_X);
        exitButton.addActionListener(evt -> System.exit(0));

        JPanel buttonPanel = new JPanel();
        buttonPanel.add(resetButton);

        setLayout(new BorderLayout());
        add(gridPanel);
        add(buttonPanel, BorderLayout.PAGE_END);
    }

    public boolean isPanelDisabled() {
        int count = 0;
        for (MyPanel3 panel : myPanels) {
            if (panel.isSelected()) {
                count++;
            }
        }
        return count >= MAX_COUNT;
    }

    private class MyMouse extends MouseAdapter {
        @Override
        public void mousePressed(MouseEvent e) {
            MyPanel3 myPanel = (MyPanel3) e.getSource();
            if (myPanel.isSelected()) {
                return; // it's already selected
            } else if (isPanelDisabled()) {
                myPanel.setSelected(false);
            } else {
                myPanel.setSelected(true);
            }
        }
    }

    private static void createAndShowGui() {
        Checkers3 mainPanel = new Checkers3();

        JFrame frame = new JFrame("Checkers");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(mainPanel);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> createAndShowGui());
    }
}



@SuppressWarnings("serial")
class MyPanel3 extends JPanel {
    private static final int PREF_W = 200;
    private static final int PREF_H = PREF_W;
    private static final int GR = 240;
    public static final Color BASE_COLOR = new Color(GR, GR, GR);
    public static final Color DISABLED_COLOR = Color.CYAN;
    public static final Color SELECTED_COLOR = Color.BLACK;
    private boolean selected = false;

    public MyPanel3() {
        setBackground(BASE_COLOR);
        setPreferredSize(new Dimension(PREF_W, PREF_H));
    }

    public void setSelected(boolean selected) {
        this.selected = selected;
        Color background = selected ? SELECTED_COLOR : DISABLED_COLOR;
        setBackground(background);
    }

    public boolean isSelected() {
        return selected;
    }

    public void reset() {
        setSelected(false);
        setBackground(BASE_COLOR);
    }
}

但是 BEST 选项是将所有逻辑放在一个或多个单独的模型类中，并使GUI尽可能哑。