public void enqueue (Object obj) {
		if (enqEnd==null) {
			enqEnd = new SListNode (obj);
//			enqEnd.item = obj; //stupid!!!
//			enqEnd.next = null;
			deqEnd = enqEnd;
			size++;
		}  else {
			enqEnd.next = new SListNode (obj);
			enqEnd = enqEnd.next;
			size++;
		}
	}