I need to use Graphics2D to draw a figure with lines representing
constraints.  Imagine a curve, with some hatching along one side.  (bad
ascii art follows)

----------------------- line
/ / / / / / / / / / / / hatching

Of course, the hatching needs to 'follow' the line as it curves and meanders
around the plot.

My initial inclination is to accomplish this with a custom implementation of
the java.awt.Stroke interface.  Is this the best way to go?  Should it be
based on some sort of paint or fill instead?  Does anyone have any examples
of something similar laying around?

Because the hatching only belongs on one side of the line, the line segment
will need to be directed...  I.e. the hatching always falls on the right
hand side of the line.  That way, if you want the hatching as above you
traverse the line from left to right.  If you want the hatching on the top
instead, you traverse the line from right to left.

Instead of hatching, it may be easier to implement this idea with a fat
alpha=0.5 line (but that is offset to the hatched side).  That way, the
constraint would be represented with a solid curve, and the hatching would
be semi-transparent.

The Stroke interface only has one method, so I'm not sure how to accomplish
these goals...

public Shape createStrokedShape(Shape s);

I found this one example, any more thoughts are greatly appreciated.

http://www.java2s.com/ExampleCode/2D-Graphics-GUI/CustomStrokes.htm

            Rob