subscribers.remove(observer);
}
public void notifyObservers() {
for (Iterator<Observer> it = subscribers.iterator(); it.hasNext();) {
Observer observer = (Observer) it.next();
try {
observer.notify(this);
} catch (RemoteException e) {
e.printStackTrace();
} catch (ObjectNotValidException e) {
e.printStackTrace();
} catch (ObjectNotFoundException e) {