Java Fullscreen mode not working on Ubuntu

Question

So I\'m using Ubuntu and when I want to enter fullscreen mode in Java, a normal window appears with max screen size, instead of a fullscreen window without title bar etc. I

Answer 1

On win7, with this code (I set the undecorated flag to true as suggested by @Gilberto and added a RED panel) it seems to work OK. If it does not work on Ubuntu, then it may mean that FullScreen mode is unsupported:

import java.awt.Color;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class Main {
    public static void main(String[] args) {
        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice vc = env.getDefaultScreenDevice();
        JFrame window = new JFrame();
        JPanel comp = new JPanel();
        comp.setBackground(Color.RED);
        window.add(comp);
        window.setUndecorated(true);
        window.setResizable(false);
        vc.setFullScreenWindow(window);
    }
}