Java sourie button

MaFrame.java :
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.HeadlessException;

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

public class MaFrame extends JFrame {

	private static final long serialVersionUID = 7779846000802492534L;
	
	public MaFrame() throws HeadlessException {
		super();
		setTitle("Fenêtre");
		setSize(320, 320);
		setLocationRelativeTo(null);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
		this.getContentPane().setBackground(Color.WHITE);
		this.setLayout(new FlowLayout());
		
		JButton bouton = new JButton("Survole-moi");
		//Pour chaque bouton, tu passes le message à afficher en paramètre
		bouton.addMouseListener(new CustomMouseListener("Voici le message d'informations"));

		this.add(bouton);
	}

	public static void main(String[] args) {
		MaFrame frame = new MaFrame();
		frame.setVisible(true);
	}

}

CustomMouseListener.java :
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

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

public class CustomMouseListener extends MouseAdapter {
	
	private JFrame jframe = new JFrame();
	private JLabel infos = null;
	
	public CustomMouseListener(String message) {
		jframe.setSize(300,150);
		jframe.setLocationRelativeTo(null);
		infos = new JLabel(message);
		jframe.add(infos);
	}

	@Override
	public void mouseEntered(MouseEvent e) {
		jframe.setVisible(true);
	}

	@Override
	public void mouseExited(MouseEvent e) {
		jframe.setVisible(false);
	}
}