Gérer la fenêtre principale

import javax.swing.UIManager;

import javax.swing.UnsupportedLookAndFeelException;

[...]

try {

            UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName());

        } catch (ClassNotFoundException e) {

            e.printStackTrace();

        } catch (InstantiationException e) {

            e.printStackTrace();

        } catch (IllegalAccessException e) {

            e.printStackTrace();

        } catch (UnsupportedLookAndFeelException e) {

            e.printStackTrace();

        }

public Fenetre() {

        fenetre = new JFrame();

        fenetre.getContentPane().setLayout(new BorderLayout());

        fenetre.setTitle("Titre de la fenêtre");

        menu = new MenuMain();

        fenetre.setJMenuBar(menu.getMenu());

        fenetre.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        message = new JLabel("Prêt");

        fenetre.setIconImage(Toolkit.getDefaultToolkit().getImage(iconeName));

        reset();

}

public void reset() {

        fenetre.getContentPane().removeAll();

        message.setBorder(BorderFactory

                .createEtchedBorder(EtchedBorder.LOWERED));

        fenetre.getContentPane().add(message, BorderLayout.SOUTH);

        fenetre.validate();

    }

    /**

     * Affiche un message dans le bas de la fenêtre

     *

     * @param pMessage

     */

    public void setMessage(String pMessage) {

        message.setText(pMessage);

    }