private void drawDashedLine( Graphics2D g, int x1, int y1, int x2, int y2, float dashlength, float spacelength, float width )
        {
            float[] dashValues = new float[] { dashLength, spaceLength } ;
            Stroke stroke = new BasicStroke( width, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, dashvalues, 0 ) ;
            g.setStroke( stroke ) ;
            Line2D line = new Line2D.Double( x1, y1, x2, y2 ) ;
            g.draw( line ) ;
        }