import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.ImageIcon;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

/**
 * ButtonDemo.java
 * Jeff Ondich, 2/25/08
 *
 * Simplified significantly from
 *     http://java.sun.com/docs/books/tutorial/uiswing/examples/components/ButtonDemoProject/src/components/ButtonDemo.java
 *
 * Go to that URL for a much more detailed demonstration
 * of JButton capabilities.
 */

public class ButtonDemo extends JPanel
                        implements ActionListener
{
    protected JButton button;

    public ButtonDemo()
    {
        button = new JButton("Click me");
        button.setActionCommand("ambivalent_button_clicked");
        button.addActionListener(this);

        //Add button to this container, using the default FlowLayout.
        add(button);
    }

    public void actionPerformed(ActionEvent e)
    {
        if (e.getActionCommand().equals("ambivalent_button_clicked"))
        {
            String label = button.getText();
            if (label.equals("Click me"))
                button.setText("Don't click me");
            else
                button.setText("Click me");
        }
    }

    /**
     * Create the GUI and show it.  For thread safety, 
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI()
    {

        //Create and set up the window.
        JFrame frame = new JFrame("Ambivalent Button Demo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        ButtonDemo newContentPane = new ButtonDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args)
    {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI(); 
            }
        });
    }
}