Making a full screen JFrame

Is it possible to make a JFrame full screen after it's been initialized, and then bring it back to windowed mode? I have this method to create a full screen JFrame, but it only works before the frame has been made visible:

publicvoid goFullScreen(){

GraphicsEnvironment env = GraphicsEnvironment.

getLocalGraphicsEnvironment();

device = env.getDefaultScreenDevice();

setUndecorated(true);

setResizable(false);

device.setFullScreenWindow(this);

}

[722 byte] By [mike200015a] at [2007-11-27 1:37:36]