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

class MyGUI1 {

    public static void main (String[] args) {

	JFrame mywindow = new JFrame ();
	mywindow.setSize (400, 400);
	mywindow.setTitle ("GUI1 Example");
	mywindow.setVisible(true);

	// To exit from the program by pressing the X button, 
	// the following statement must be included

	mywindow.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

	// The easiest way to display a message/result is to
	// use the JOptionPane class

	JOptionPane.showMessageDialog (null, "Hello, there!");

	// A small computation with result displayed in mywindow
	
	int a, b, result;
	a = 5;
	b = 9;
	result = a + b;

	JOptionPane.showMessageDialog (mywindow, "Next comes the result:");
	JOptionPane.showMessageDialog (mywindow, result);

	JOptionPane.showMessageDialog (null, "Good bye");

    }
}