Note that most of the methods are not thread-safe. this causes no problem as
the methods are not intended to be directly called by clients. instead the superclass
implements the interface EventQueue and invokes the methods thereby synchronizing access.
author: Alphonse Bendt version: $Id: BoundedDeadlineEventQueue.java,v 1.9 2006/02/25 15:28:40 alphonse.bendt Exp $