import javax.swing.JComponent;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;

public class ThreeDButtonComponent extends JComponent
{
   public void paintComponent(Graphics g)
   {
      Graphics2D g2 = (Graphics2D) g;

      g.setColor(Color.PINK);
      Rectangle box1 = new Rectangle(50, 50, 100, 100);
      g2.fill(box1);

      g.setColor(Color.pink.darker());
      g2.fillRect(150, 48, 2, 104);
      g2.fillRect(48, 150, 104, 2);

      g.setColor(Color.pink.brighter());
      g2.fillRect(48, 48, 2, 102);
      g2.fillRect(48, 48, 102, 2);

   }
}