Iterator vs. ListIterator

Iterator	ListIterator
Can traverses List and Set both	Can traverse List only
Can traverse in only forward direction	Can traverse in both (forward / Backward) directions
Cannot obtain indexes while traversing	Can obtain indexes at any point of time using nextIndex(), previousIndex()
Cannot add element to collection while traversing & Throws ConcurrentModificationException	Can add element at any point of time
Cannot replace the existing element value while traversing	Can replace the value by using ListIterator.set(E e) Can replace elements returned by next() or previous() methods

Methods of Iterator

• To Check next element, Go to next , Remove element

hasNext() , next() , remove()

Additional methods of ListIterator

• To Check previous element, Go to previous, Get next / previous index, Add element, Set value to element

hasPrevious() , previous()

nextIndex() , previousIndex()

add(E e) , set(E e)