Võrrelge Iterator ja ListIterator liideseid. Millised on nende peamised erinevused ja millistel juhtudel on parem kasutada igaüht neist?

Iterator allows traversing the elements of a collection in one direction (forward), checking for the next element (hasNext()) and retrieving it (next()). It can remove the current element (remove()). It is used for general traversal of any collection implementing the Iterable interface.

ListIterator inherits from Iterator and adds functionality:

• Movement in both directions (hasPrevious(), previous()).
• Getting the index of the current (nextIndex()) and previous (previousIndex()) element.
• Modifying an element (set()).
• Adding an element (add()).

ListIterator is applicable only to collections that implement the List interface, as it works with indices.

Use Iterator for universal traversal and removal of elements in any Iterable collection. Use ListIterator for specialized operations with List (bidirectional movement, modification, index-based addition).