import javax.swing.*;
import java.awt.event.*;  //event listener interface

public class Ex32_EventObjectWindow extends JFrame
{
	private JButton button1;
	private JButton button2;
	private JButton button3;
	private JPanel panel;
	private final int WINDOW_WIDTH = 300;
	private final int WINDOW_HEIGHT = 70;

	//constructor
	public Ex32_EventObjectWindow()
	{
		setTitle("Event Object Demonstrator");
		setSize (WINDOW_WIDTH, WINDOW_HEIGHT);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		button1 = new JButton("Button 1");
		button2 = new JButton("Button 2");
		button3 = new JButton("Button 3");
		button1.addActionListener(new ButtonListener());
		button2.addActionListener(new ButtonListener());
		button3.addActionListener(new ButtonListener());
		
		panel = new JPanel();
		panel.add(button1);
		panel.add(button2);
		panel.add(button3);
		add(panel);
		
		setVisible(true);
	}
	
	//private inner class
	private class ButtonListener implements ActionListener
	{
		public void actionPerformed (ActionEvent e)
		{
			String actionCommand = e.getActionCommand();
			System.out.println(actionCommand);
			if (actionCommand.equals("Button 1"))
			{
				JOptionPane.showMessageDialog(null, "You clicked the first button");
			} else if (actionCommand.equals("Button 2"))
			{
				JOptionPane.showMessageDialog(null, "You clicked the second button");
			} else if (actionCommand.equals("Button 3"))
			{
				JOptionPane.showMessageDialog(null, "You clicked the third button");
			}
		}
	}
}