// SwingGUIsFrameDemoOne.java
// One JButton widget in a JFrame. 
//simpler version of SwingGUIsFrameDemo.java

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

public class SwingGUIsFrameDemoOne implements ActionListener {

    private JFrame outputFrame;
    private Container container;
    private JButton myButton;

    public static void main( String [] args ) {
	SwingGUIsFrameDemoOne myFrameDemo = new SwingGUIsFrameDemoOne();
    }
    
    //constructor
    public SwingGUIsFrameDemoOne() {
	outputFrame = new JFrame();
	outputFrame.setSize(600,500);
	outputFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
	container = outputFrame.getContentPane();  
	container.setLayout( new FlowLayout() );  
	
	myButton = new JButton( "My JButton" );
	container.add( myButton );
        //handler is the actionPerformed() below. in 'this' object.
	myButton.addActionListener( this ); 
	
	outputFrame.setVisible(true);
    }

    
    // event handler for JButton events.
    //required method if implementing ActionListener
    public void actionPerformed( ActionEvent event ) {
	if ( event.getSource() == myButton ) {
	    JOptionPane.showMessageDialog(null,"myButton got it");
	}
    } 
}