import java.awt.Container;
import java.awt.FlowLayout;

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

public class InterfaceTest extends JFrame {

    private FlowLayout layout;
    private Container conteneur;

    public InterfaceTest() {

        super("test");
        setSize(320, 200);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        this.layout = new FlowLayout();
        this.conteneur = getContentPane();
        setLayout(layout);

        final JLabel lblTitre = new JLabel("Test interface Graphique");
        conteneur.add(lblTitre);

        final JButton btnQuitter = new JButton("Quitter");
        conteneur.add(btnQuitter);

        setVisible(true);

    }
}