Hi Mirina,
Welcome to JavaRanch!
First, a little business: we have a
naming policy here at the Ranch; it says that your display name has to be a real first and last name. You can change yours
here. Thanks!
Now, as to your question: Sun's Java tutorial has tons of information about trees; see
here. Reading that page and trying the demos would be a good start.
Finally, we've got a whole forum dedicated to Swing and its cousins; the folks there will be able to help you with your JTree questions. So I'll move this
thread there. [ October 02, 2004: Message edited by: Ernest Friedman-Hill ]