// Assume we’'ve created an MultiUserChat named"muc".
Iterator iter = muc.getOccupants();
Occupant opt =(Occupant)iter.next();
log.info("
opt.getNick()------ \n"+opt.getNick());
it throw a Exception:
java.util.NoSuchElementException
at java.util.AbstractList$Itr.next(Unknown Source)
at java.util.Collections$1.next(Unknown Source)