Listiterator.. problem with browsable list

Question

hello there!
i have a class Text which has variables:
Paragraph: a vector of Vectors each of whom represents a paragraph
Wordlists: each wordlist is a vector of Words representng a paragraph.
Now, i want that in every instance of the class the program will know the actual paragraph and word it is scanning, and so to provide with methods like goForward() or goBack() to move to the next word or the prev in the text.of course if a paragraph ends and there is another one i want the method to point to the 1st word of the new paragraph.
i used also a listiterator which was initialized to the 1st wordlist, that was the 1st paragraph. now, i tried to re-inizialize the listIterator (with a new listIterator() call) in the case goForward() had to go to the next paragraph, but it seems not to work. It is a pity because the listiterator, used as a class variable, was a good way to remember the actual word pointed (i used an int to remember the paragraph)..... But it doesn't work!
can you give me any suggestion please?
thanks a lot!!!

Answer 1

You could write your own ListIterator implementation that internally works on two ListIterators: one, that accesses the paragraph-vector, and another one, that represents the current wordlist-vector. Your own implementation would return the current element provided by the wordlist-iterator. If you reach the begin or end of a paragraph, you change the underlying wordlist iterator.
From outside, you always access the same ListIterator (namely an instance of your implementation).