The standard GUI classes supplied with Java are the AWT and Swing classes - Swing is the most recent and widely used. With Swing windows/frame components (presumably the equivalent of 'forms'), you show and hide them with setVisible(true) and setVisible(false). However, you have said you're using a class that isn't part of Swing or AWT, and you can't tell us anything about it other than it doesn't have a setVisible method. From this, you expect us to be able to tell you how to show and hide it? Are we supposed to be clairvoyant?
Look, all I want to do is get a Java program to show/hide forms, that's it! Please, someone other than Norm help me out!