How to make a JFrame really fullscreen?

Question

In my Java application I try to make a JFrame really fullscreen by using this code:

public class MainFrame extends JFrame {

    private static final long se         


        

Answer 1

An example:

import java.awt.FlowLayout;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;




public class FullScreenJFrame extends JFrame{

    private GraphicsDevice vc;

    public FullScreenJFrame(){
     super();

     GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();
     vc= e.getDefaultScreenDevice();



     JButton b = new JButton("exit");
     b.addActionListener(
             new ActionListener(){
                 public void actionPerformed(ActionEvent arg0) { 
                     dispose();
                     System.exit(0);

                 }
             }
             );
     this.setLayout(new FlowLayout());
     this.add(b);
     setFullScreen(this);
 }

 public void setFullScreen(JFrame f){

     f.setUndecorated(true);
     f.setResizable(false);
     vc.setFullScreenWindow(f);


 }

 public static void main(String[] args){
     new FullScreenJFrame();
 }

}