import javax.swing.*;
import java.awt.*;

public class Boutons{

	public static void main(String[] args) {
    JFrame fenetre = new JFrame(); //Objet representant la fenetre
    fenetre.setSize(500, 300); //taille de la fenetre
    fenetre.setLocation(0, 0); //position de la fenetre dans l'ecran
    fenetre.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton bouton1 = new JButton("bouton 1");
    JButton bouton2 = new JButton("bouton 2");
    JButton bouton3 = new JButton("bouton 3");
    JButton bouton4 = new JButton("bouton 4");
    JButton bouton5 = new JButton("bouton 5");

    bouton1.setHorizontalAlignment(JButton.CENTER);
    fenetre.add(bouton1, BorderLayout.CENTER);

    bouton2.setHorizontalAlignment(JButton.CENTER);
    fenetre.add(bouton2, BorderLayout.SOUTH);

    bouton3.setHorizontalAlignment(JButton.CENTER);
    fenetre.add(bouton3, BorderLayout.NORTH);

    bouton4.setHorizontalAlignment(JButton.CENTER);
    fenetre.add(bouton4, BorderLayout.WEST);

    bouton5.setHorizontalAlignment(JButton.CENTER);
    fenetre.add(bouton5, BorderLayout.EAST);

    fenetre.setVisible(true);
}
}