Enumeration enum = aSchedule.getAllScheduleElements(); if(!enum.hasMoreElements()) return false;
Enumeration en = aSchedule.getAllScheduleElements(); if(!en.hasMoreElements()) return false;
   static private boolean isOverlappingSchedule(Schedule aSchedule) {       if(aSchedule != null) {	   Enumeration enum = aSchedule.getAllScheduleElements();	   if(!enum.hasMoreElements()) return false; 	   long last_time = aSchedule.getStartTime()-1;	   while (enum.hasMoreElements()) {	       ScheduleElement element = (ScheduleElement)enum.nextElement();	       if (element.getStartTime() <= last_time) return true;	       last_time = element.getEndTime();	   }       }