import java.awt.event.*; public class VolumeAct implements MouseWheelListener { private int a; private Cercles ce; public VolumeAct(Cercles chat){ super(); this.a=0; this.ce=chat; } public void mouseWheelMoved(MouseWheelEvent e){ int i; i=e.getWheelRotation(); if(i<0 && this.a<10){ this.a++; ce.getNombre(this.a); } if(i>0 && this.a>0){ this.a--; ce.getNombre(this.a); } } }