JTree: how not to render the "tree connecting lines"

I have a JTree.
I would like that my custom tree renderer (using windows LAF) did not paint the dotted line that connect the hierarchy nodes. setting the icon to null in the default renderer only do not paint the folder. How can I disable also the painting of the dotted line?
using
tree.putClientProperty("JTree.lineStyle", "None")
I disable it for the whole tree.
First of all this do not work on Windows LAF. Then I'd like to disable only on certain branches or nodes, that are somehow as "empty containers", while keeping hte default feature for the "good branches".
any idea?
thanks
Edited by: Davide_Gesino on Nov 8, 2009 5:24 AM

hii,
one from possible:
tree.putClientProperty("JTree.lineStyle", "Horizontal"); a lots examples (runnable) at http://www.java2s.com/Code/Java/Swing-JFC/Tree.htm
... kopik

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