I dont think its possible with jTree. I never came across such method/
setting in jTree. Here is the reference:
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JTree.html

-Sundar
http://heysundar.blogspot.com

You would need to do some custom coding, but it probably wouldn't be
*that* difficult. I would look at the drawing code (paintComponent?),
and see how it does its calculations.

Then, rather than starting from an origin of (0,0), and adding offsets
to figure out where to render nodes, start by calculating the height of
your tree, then use that height and subtract offsets to figure out where
to paint the nodes.

Regards,

Rogan