What is the difference between an Iterator and a ListIterator ?

Solution:

This question tests the proper usage of collection iterators. One can only use ListIterator to traverse Lists, and cannot traverse a Set using ListIterator.

What’s more, one can only traverse in a forward direction using Iterators. Using ListIterator, one can traverse a List in both the directions (forward and backward).

One cannot obtain indexes while using Iterator. Indexes can be obtained at any point of time while traversing a list using ListIterator. The methods nextIndex() and previousIndex() are used for this purpose.

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