// Get the size of the screen
                        Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();

                        // Determine the new location of the window
                        int w = fenetre.getSize().width;
                        int h = fenetre.getSize().height;
                        int x = (dim.width-w)/2;
                        int y = (dim.height-h)/2;

                    // Move the window
                    fenetre.setLocation(x, y);