// Make sure you do your import statements!
//  for example, these:

import javax.swing.JPanel;
import javax.swing.JFrame;

public class Circles extends JPanel
{
   public static void main( String args[] )
   {
     // set up main program here, which will involve creating a JFrame
     //    and embedding a panel in it.


   }

   public void paintComponent( Graphics g )
   {
      // this is still the paintComponent method for the panel,
      //  because this class extends JPanel

   }
}