The following article describes When do we use Iterator in Java.

An Iterator is used in Java when you want to traverse through a collection of elements, such as a list or a set, and access its elements one by one. It provides a way to access the elements of a collection in a sequential manner without knowing the underlying data structure.

Here are some of the use cases for using Iterators in Java:

  1. Traversing through a collection: Iterators provide an easy way to traverse through a collection of elements and access each element one by one.
  2. Removing elements from a collection: Iterators provide a convenient way to remove elements from a collection while iterating through it, without affecting the underlying data structure.
  3. Modifying elements of a collection: Using an Iterator, you can modify elements of a collection while iterating through it, without affecting the underlying data structure.
  4. Accessing elements in a synchronized manner: If a collection is being used by multiple threads, you can use an Iterator to access its elements in a synchronized manner to avoid concurrency issues.

In short, Iterators provide a convenient way to access the elements of a collection, modify or remove elements, and access elements in a synchronized manner, without affecting the underlying data structure.


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