In this post, we will understand the difference between Iterator and ListIterator.
Iterator
It helps traverse through a map, list and a set.
Index can’t be obtained with the help of an iterator.
The iterator can’t modify or replace elements of a Collection.
It traverses through elements present in Collection.
This iteration can be done in the forward direction only.
Elements can’t be added, since it would throw ConcurrentModificationException.
Methods of the iterator are ‘next()’, ‘remove()’, ‘hasNext()’.
ListIterator
It helps traverse through a list only.
It can’t traverse through a map and a set.
It can traverse through the elements present in Collection.
The traversal can be done in both forward and backward directions.
Some of the methods of listiterator are ‘nextIndex()’, ‘previousIndex()’, ‘previous()’, ‘next()’.
The elements can be modified or replaced.
Elements can be added to a collection anytime.