[Java] swing : Survol d'un bouton

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.BevelBorder;


public class OverButtonDemo extends JFrame {
	private JButton overButton;

	public OverButtonDemo(String title) {
		super(title);
		initialize();
	}

	private void initialize() {
		JPanel buttonPanel = new JPanel();
		buttonPanel.setSize(320,200);
		overButton = new JButton("Survolez-moi");
		overButton.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED));
		overButton.addMouseListener(new MouseListener() {

			public void mouseClicked(MouseEvent e) {}

			public void mouseEntered(MouseEvent e) {
				JButton source = (JButton)e.getSource();
				source.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
			}

			public void mouseExited(MouseEvent e) {
				JButton source = (JButton)e.getSource();
				source.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED));
			}

			public void mousePressed(MouseEvent e) {}

			public void mouseReleased(MouseEvent e) {}
		});
		
		buttonPanel.add(overButton);
		getContentPane().add(buttonPanel);
	}

	public static void main(String[] args) {
		OverButtonDemo demo = new OverButtonDemo("Démo de survol de bouton");
		demo.pack();
		demo.setVisible(true);
	}
}