Difference Between Iterator and ListIterator in Java

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.

AmitDiwan

Published on 24-Mar-2021 12:30:33

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