public class FullScreenTest
{

    GraphicsDevice device;

    public FullScreenTest()
    {
        GraphicsEnvironment ge = GraphicsEnvironment
                .getLocalGraphicsEnvironment();
        device = ge.getDefaultScreenDevice();
        GraphicsConfiguration gc = device
                .getDefaultConfiguration();

        try {
            JFrame frame = new JFrame(gc);
            frame.setUndecorated(true);

            JButton button = new JButton("OK");
            button.addActionListener(new ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    device.setFullScreenWindow(null);
                    System.exit(0);
                }
            });

            frame.getContentPane().add(button);
            device.setFullScreenWindow(frame);
            frame.setVisible(true);
        } catch (Exception ex) {
            device.setFullScreenWindow(null);
            System.exit(0);
        }
    }

    public static void main(String[] args)
    {
        FullScreenTest test = new FullScreenTest();
    }
}