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

public class Boutons 
{
  public static void main(String[] args) 
  {
    JFrame frame = new JFrame("Boutons");

    JButton btn1 = new JButton("Luc Hernandez prof de DEV");
    btn1.setSize(100,100);

    JButton btn2 = new JButton("Pierre");
    btn2.setBounds(50,100,50,40);

    JButton btn3 = new JButton("Louqa");
    btn3.setBounds(150,100,50,40);

    JButton btn4 = new JButton("ok");
    btn4.setBounds(200,100,50,40);

    JButton btn5 = new JButton("bou");
    btn5.setBounds(250,100,50,40);
    btn1.setHorizontalAlignment(JLabel.LEFT);
    btn1.setVerticalAlignment(JLabel.BOTTOM);
    frame.add(btn1, BorderLayout.WEST);
    frame.add(btn2);
    frame.add(btn3);
    frame.add(btn4);
    frame.add(btn5);
    frame.setSize(300,300);
    frame.setLayout(null);
    frame.setVisible(true);  
  }
}