JProgressBar and SQL query

Good day!
Prompt, pliz, as in Swinge do to make the time to query the database would change the status JProgressBar ....

For example:

JProgressBar pb = new JProgressBar ();
pb .. setIndeterminate (true);

............ SQL .........

pb .. setIndeterminate (false);

ie I would like some time to run 2 simultaneous threads (processes).

??????

Check out the progress bar tutorial and the concurrency in Swing tutorial both at the Oracle Java tutorial site.

How to use Progress Bars

Concurrency in Swing

Best of luck