update

DEV.2.1/TP/TP9-Event..suite/1./Mafenetre.java

@@ -9,7 +9,8 @@ public class Mafenetre extends JFrame {
 		this.setSize(697,156);
 		this.setLocation(500,250);
 
-		Volume instance = new Volume();
+		Volume volume = new Volume();
+		this.add(volume);
 	}
 
 }

DEV.2.1/TP/TP9-Event..suite/1./MouseWheel.java

@@ -10,7 +10,7 @@ public class MouseWheel implements MouseWheelListener {
 
 	@Override
 	public void mouseWheelMoved(MouseWheelEvent evenement) {
-
+		
 	}
 
 }