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LinkListIterator's next Method

private class LinkedListIterator implements ListIterator
{  . . .
   public Object next()
   {
      if (!hasNext())
         throw new NoSuchElementException();
      previous = position; // remember for remove

      if (position == null)
         position = first;
      else
         position = position.next;

      return position.data;
   }
   . . .
}


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