ListItr(int index) 
{
            super();
            cursor = index;
}

 public  void add(E e) 
{
            checkForComodification();
            try {
                int i = cursor;
                ArrayList.this.add(i, e);
                cursor = i + 1;
                lastRet = -1;
                expectedModCount = modCount;
            } catch (IndexOutOfBoundsException ex) {
                throw new ConcurrentModificationException();
            }
}

 public boolean hasPrevious() 
{
            return cursor != 0;
}

 public int nextIndex() 
{
            return cursor;
}

 public E previous() 
{
            checkForComodification();
            int i = cursor - 1;
            if (i <  0)
                throw new NoSuchElementException();
            Object[] elementData = ArrayList.this.elementData;
            if (i  >= elementData.length)
                throw new ConcurrentModificationException();
            cursor = i;
            return (E) elementData[lastRet = i];
}

 public int previousIndex() 
{
            return cursor - 1;
}

 public  void set(E e) 
{
            if (lastRet <  0)
                throw new IllegalStateException();
            checkForComodification();
            try {
                ArrayList.this.set(lastRet, e);
            } catch (IndexOutOfBoundsException ex) {
                throw new ConcurrentModificationException();
            }
}