import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;

public class RectangleMover implements ActionListener
{
   public static RectangleComponent component;
   public static void main(String[] args)
   {
      JFrame frame = new JFrame();

      frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
      frame.setTitle("A moving rectangle");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      JPanel panel = new JPanel();
      component = new RectangleComponent();
      component.setPreferredSize(new Dimension(COMPONENT_WIDTH, COMPONENT_HEIGHT));
      panel.add(component);

      JButton button = new JButton("Move");
      panel.add(button);

      frame.add(panel);
      frame.setVisible(true);
   }

   public void actionPerformed(ActionEvent e)
   {
      component.moveBy(10, 10);
   }

   private static final int FRAME_WIDTH = 300;
   private static final int FRAME_HEIGHT = 400;
   private static final int COMPONENT_WIDTH = 200;
   private static final int COMPONENT_HEIGHT = 400;
}