Boring Window

import javax.swing.*;

public class pro
import javax. swing. *;

public class bor extends JFrame
{
    public static void main ( String[] args )
    {
        JFrame f = new bor ();
        f.setDefaultCloseOperation ( JFrame.EXIT_ON_CLOSE );
        f.setSize(300, 200);
        f.setVisible(true);
        // hmm... thats pretty useful
    }
}
    

Picture of the output