import java.awt.Color;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.AbstractAction;

import javax.swing.Action;

import javax.swing.BoxLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JMenuBar;

import javax.swing.JMenu;

import javax.swing.JMenuItem;

import javax.swing.JPanel;

public class ColorBox2 extends JFrame {

private JPanel colorPanel;

private Action redAction;

private Action whiteAction;

private Action blueAction;

private class RedAction extends AbstractAction {

public RedAction() {

super("Red");

}

public void actionPerformed(ActionEvent e) {

colorPanel.setBackground(Color.RED);

}

}

public ColorBox2() {

super("Color, Box, and Nesting Demo");

initActions();

// Set up color panel

colorPanel = new JPanel();

colorPanel.setSize(200, 200);

// Set up main application frame

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// Grid layout with 1 row, 2 columns

setLayout(new GridLayout(1, 2));

add(createButtonPanel());

add(colorPanel);

setJMenuBar(createJMenuBar());

redAction.setEnabled(false);

}

private void initActions() {

redAction = new RedAction();

whiteAction = new AbstractAction("Weiss") {

public void actionPerformed(ActionEvent e) {

colorPanel.setBackground(Color.WHITE);

}

};

blueAction = new AbstractAction("Blue") {

public void actionPerformed(ActionEvent e) {

colorPanel.setBackground(Color.BLUE);

}

};

}

private JPanel createButtonPanel() {

JButton redButton = new JButton(redAction);

JButton whiteButton = new JButton(whiteAction);

JButton blueButton = new JButton(blueAction);

JPanel buttonPanel = new JPanel();

buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.Y_AXIS));

buttonPanel.add(redButton);

buttonPanel.add(whiteButton);

buttonPanel.add(blueButton);

return buttonPanel;

}

private JMenuBar createJMenuBar() {

JMenuItem redMenuItem = new JMenuItem(redAction);

JMenuItem whiteMenuItem = new JMenuItem(whiteAction);

JMenuItem blueMenuItem = new JMenuItem(blueAction);

JMenu colorMenu = new JMenu("Color");

colorMenu.add(redMenuItem);

colorMenu.add(whiteMenuItem);

colorMenu.add(blueMenuItem);

JMenuBar menuBar = new JMenuBar();

menuBar.add(colorMenu);

return menuBar;

}

public static void main(String[] args) {

ColorBox2 cb = new ColorBox2();

cb.pack();

cb.setVisible(true);

}

}