How to show progress bar in java?

Hey guys!!! can any one tell me how to show the progress bar when a processing is going on?Is it done by multithreading? I have to import data from database kept in another machine into my database.It would take quite a longer time especially when database is quite large.I want to show the progress and every data being imported to the user so that user does not think that system has hanged on...Please help...

[419 byte] By [Vinodbhai@suna] at [2007-11-27 8:57:29]