javax.swing.JColorChooser

In this example, I'm going to open a JColorChooser dialog from menu to select color for background.

Continuous modify JFrameWin.java from last exercise "Example of using Swing JMenu". But, I can't setBackground on JFrame - I don't know why! So I add a JPanel over the JFrame.

package javatestswing;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;

/**
 *
 * @web http://java-buddy.blogspot.com/
 */
public class JFrameWin extends JFrame{
    
    public JFrameWin(){
        
        final JPanel jPanel = new JPanel();
        
        this.setTitle("java-buddy.blogspot.com");
        this.setSize(500, 400);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
        JButton buttonExit = new JButton(" Exit ");
        buttonExit.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent ae) {
                System.exit(0);
            }
        });

        jPanel.add(buttonExit);
        add(jPanel);
        
        JMenuBar menuBar = new JMenuBar();
        
        JMenu menuA = new JMenu("Choose Color");
        JMenuItem menuItemDoColorChooser = new JMenuItem("Open JColorChooser");
        menuItemDoColorChooser.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent ae) {
                
                doColorChooser(jPanel);
            }
        });
        menuA.add(menuItemDoColorChooser);

        JMenu menuB = new JMenu("Quit...");
        JMenuItem menuItemB1 = new JMenuItem("Exit");
        menuItemB1.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent ae) {
                System.exit(0);
            }
        });
        menuB.add(menuItemB1);

        
        menuBar.add(menuA);
        menuBar.add(menuB);
        this.setJMenuBar(menuBar);
        
    }
    
    private void doColorChooser(JPanel panel){
        Color color = JColorChooser.showDialog(
                panel,
                "JColorChooser",
                panel.getBackground());
        
        if (color != null){
            panel.setBackground(color);
        }
    }
}