Simple question - multiple Windows in a Java app

I'm very new to Java after many years programming VB so forgive the simplicity of the question.

However, what is the best method to display a modal window from another window.

Java is very flexible and I can get a couple of techniques but none of the ideas I have come up with don't seem very elegant.

I want the calling window to be disabled while I process commands in my modal window. Then, when my modal window closes down to reenable the calling window.

Is there a standard technique for doing this?

Cheers