Multi-document Application using JTextPane - Issue

Question

Hi.
I'm making a java IDE as a class assignment where the user opens a certain project and all associated files open (i.e. all files in the requested folder). Opening is not an issue but here's the real problem. When a file opens (in the JTextPane), the user should be able to edit it. Although my program enables this, what also happens is that if the user switches onto viewing another file (i.e. clicking a file name from a tree in the file pane) the previously open file obviously closes and nothing is saved. I don't want to save the users edits in the actual file until and unless the user themselves click save, but 'd like the application to store the intermediate state of documents until a save request or until the program is terminated. Is there any easy way of doing this?
Thanks.

Answer 1

{color:#000080}Cross posting.{color}
http://forum.java.sun.com/thread.jspa?threadID=5217794&tstart=0
{color:#000080}Cross posting is rude.
db{color}