/**
 *  Name: Stuart Hansen
 *  
 *  Purpose:
 *      This project illustrates how to open 
 *      and close a windowing application in Java
 *  
 *  Date: January 26, 2003
 */

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

public class ButtonsAndLabels extends JFrame
{

    JButton helloButton;      // sets the text to "Hello World!"
    JButton goodByeButton;    // sets the text to "Good bye World!"
    
    JLabel messageLabel;  // a label to display messages
    /**
     * Constructor for objects of class ClassWithButtonsAndLabels
     */
    public ButtonsAndLabels()
    {
    
        // get the content pane and set the layout to null
        Container c = getContentPane();
        c.setLayout(null);
        
        // Initialize the messageLabel
        messageLabel = new JLabel ("Are you coming or going?");
        messageLabel.setSize(200, 30);
        messageLabel.setLocation (50, 50);
        c.add(messageLabel);
        
        // Add the hello button
        helloButton = new JButton("Hello");
        helloButton.setSize(125, 30);
        helloButton.setLocation (50, 100);
        helloButton.addActionListener(new HelloHandler());
        c.add(helloButton);
        
        // Add the good bye button
        goodByeButton = new JButton ("Good bye");
        goodByeButton.setSize(125, 30);
        goodByeButton.setLocation(175, 100);
        goodByeButton.addActionListener(new GoodByeHandler());
        c.add(goodByeButton);
        
        // Initialize the application window
        setTitle("Very Simple GUI");
        setSize(500, 300);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);
    }

    public static void main (String [] args)
    {
        new ButtonsAndLabels();
    }
    
    // An inner class to handle the hello button
    class HelloHandler implements ActionListener
    {
        public void actionPerformed (ActionEvent e)
        {
            messageLabel.setText("Hello World!");
        }
    }
    
    // An inner class to handle the goodbye button
    class GoodByeHandler implements ActionListener
    {
        public void actionPerformed (ActionEvent e)
        {
            messageLabel.setText("Good bye Cruel World!");
        }
    }
}