import javax.swing.*;
public class WindowDemo
{
private JFrame myWindow;
public WindowDemo()
    {
    myWindow = new JFrame();

    myWindow.setLocation( 400, 200 );
    myWindow.setSize(10000, 10000);
    myWindow.setTitle("HELLO");
    myWindow.setDefaultCloseOperation( myWindow.EXIT_ON_CLOSE );

    JButton exitButton = new JButton("EXIT");
    myWindow.add(  exitButton );

    myWindow.setVisible( true );
    }

public static void main(String args [])
    {
    WindowDemo  app  = new WindowDemo();
    }
}