制作1個單獨的JButton更改面板背景

Question

快速問題如何使1 JButton在單擊時更改面板的顏色並顯示它是什么顏色我已經完成了一些教程，當單擊一個不同的按鈕時有3個JButtons顏色更改但是如何只做一個JButton更改面板顏色例如黃色，綠色和紅色。

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

   public class ChangeButtonColor{
   JButton button;
   public static void main(String[] args){
   ChangeButtonColor cl = new ChangeButtonColor();
  }

   public ChangeButtonColor(){
      JFrame frame = new JFrame("Change JButton Color");
      JPanel panel = new JPanel();
      button = new JButton();
      button.addActionListener(new MyAction());
      frame.add(button);
      frame.setSize(400, 400);
      frame.setVisible(true);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 }

  public class MyAction implements ActionListener{
  public void actionPerformed(ActionEvent e){


   }
 }
}

Answer 1

“也許我可以這樣做，例如當點擊按鈕時（如果面板顏色是紅色打印出紅色，否則如果面板是綠色打印出綠色）那將是好的”

例如，您可以檢查if (panel.getBackground() == Color.RED)

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

public class ColorClick {

    public static void main(String[] args) {
        final JPanel panel = new JPanel(new GridBagLayout()) {
            {
                setBackground(Color.RED);
            }
            @Override
            public Dimension getPreferredSize() {
                return new Dimension(200, 200);
            }
        };
        JButton button = new JButton("Change Color");
        button.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e) {
                if (panel.getBackground() == Color.RED) {
                    System.out.println("RED");
                    panel.setBackground(Color.GREEN);
                } else if (panel.getBackground() == Color.GREEN) {
                    System.out.println("GREEN");
                    panel.setBackground(Color.RED);
                }
            }
        });
        panel.add(button);
        JOptionPane.showMessageDialog(null, panel);
    }
}