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

public class Direction {

    public Direction() {
        JFrame fenetre = new JFrame("Boutons aux Coins");
        fenetre.setSize(400, 400);
        fenetre.setMinimumSize(new Dimension(150,150));
        fenetre.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panneau = new JPanel(new BorderLayout());

        JButton hautGauche = new JButton("◤");
        JButton hautDroit = new JButton("◥");
        JButton basGauche = new JButton("◣");
        JButton basDroit = new JButton("◢");

        hautGauche.setPreferredSize(new Dimension(50, 50));
        hautDroit.setPreferredSize(new Dimension(50, 50));
        basGauche.setPreferredSize(new Dimension(50, 50));
        basDroit.setPreferredSize(new Dimension(50, 50));

        JPanel panneauHautGauche = new JPanel(new FlowLayout(FlowLayout.LEFT));
        panneauHautGauche.add(hautGauche);

        JPanel panneauHautDroit = new JPanel(new FlowLayout(FlowLayout.RIGHT));
        panneauHautDroit.add(hautDroit);

        JPanel panneauHaut = new JPanel(new BorderLayout());
        panneauHaut.add(panneauHautGauche, BorderLayout.WEST);
        panneauHaut.add(panneauHautDroit, BorderLayout.EAST);

        JPanel panneauBasGauche = new JPanel(new FlowLayout(FlowLayout.LEFT));
        panneauBasGauche.add(basGauche);

        JPanel panneauBasDroit = new JPanel(new FlowLayout(FlowLayout.RIGHT));
        panneauBasDroit.add(basDroit);

        JPanel panneauBas = new JPanel(new BorderLayout());
        panneauBas.add(panneauBasGauche, BorderLayout.WEST);
        panneauBas.add(panneauBasDroit, BorderLayout.EAST);

        panneau.add(panneauHaut, BorderLayout.NORTH);
        panneau.add(panneauBas, BorderLayout.SOUTH);

        fenetre.add(panneau);
        fenetre.setVisible(true);
    }

    public static void main(String[] args) {
        Direction test = new Direction();
        };
    }