return 0;
if (orientation == SwingConstants.HORIZONTAL) return visible.width / 10; else if (orientation == SwingConstants.VERTICAL) return visible.height / 10; else throw new IllegalArgumentException("orientation must be either " + "javax.swing.SwingConstants.VERTICAL " + "or " + "javax.swing.SwingConstants.HORIZONTAL" );
  public int getScrollableUnitIncrement(Rectangle visible, int orientation,                                        int direction)    {	return 0;    }