1  import javax.swing.JFrame;

  2  

  3  public class RectangleViewer

  4  {

  5     public static void main(String[] args)

  6     {

  7        JFrame frame = new JFrame();

  8  

  9        frame.setSize(300, 400);

 10        frame.setTitle("Two rectangles");

 11        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 12  

 13        RectangleComponent component = new RectangleComponent();

 14        frame.add(component);

 15  

 16        frame.setVisible(true);

 17     }

 18  }