      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  }