code: public void paintHover(Graphics2D g, JComponent c, int width, int height) {
          paint(g, c, width, height, hoverBorder, hoverCorner, hoverInterior);
      }
docs: Paint the mouse-over state of the button foreground.
  
  @param g      the Graphics2D context to paint with.
  @param c      the button to paint.
  @param width  the width to paint.
  @param height the height to paint.