import javax.swing.JComponent;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;

public class ThreeButtonComponent extends JComponent
{
   public void paintComponent(Graphics g)
   {
      Graphics2D g2 = (Graphics2D) g;
      g2.setColor(Color.GRAY);
      g2.fill3DRect(50, 50, 50, 50, true);
      g2.fill3DRect(110, 50, 50, 50, true);
      g2.fill3DRect(170, 50, 50, 50, true);
      g2.setColor(Color.RED);
      g2.fillOval(60, 60, 30, 30);
      g2.setColor(Color.GREEN);
      g2.fillOval(120, 60, 30, 30);
      g2.setColor(Color.cyan);
      g2.fillOval(180, 60, 30, 30);

   }
}