How to have List Iterator start at a given index?

Question

I have a linked list and I need to make method that returns an iterator at a given point in the list. I currently have an iterator that starts at the head:

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Answer 1

Without seeing your implementation, the trivial way to do this is:

public Iterator iterator(int x) {
    if (x < 0 || this.size() < x) {
        throw new IndexOutOfBoundsException();
    }

    Iterator it = new ListIterator();

    for (; x > 0; --x) {
        it.next(); // ignore the first x values
    }
    return it;
}

Otherwise, you could traverse the list to the xth node, but there's no reason you can't do it this way.