Iterator pattern Java

1. What is Iterator pattern in Java?
2. When to use Iterator pattern in Java?
3. What is Iterator pattern explain with example?
4. What are the advantages of Iterator pattern?

What is Iterator pattern in Java?

Iterator pattern is very commonly used design pattern in Java and . Net programming environment. This pattern is used to get a way to access the elements of a collection object in sequential manner without any need to know its underlying representation. Iterator pattern falls under behavioral pattern category.

When to use Iterator pattern in Java?

Iterator pattern is useful when you want to provide a standard way to iterate over a collection and hide the implementation logic from client program. The logic for iteration is embedded in the collection itself and it helps client program to iterate over them easily.

What is Iterator pattern explain with example?

In object-oriented programming, the iterator pattern is a design pattern in which an iterator is used to traverse a container and access the container's elements. The iterator pattern decouples algorithms from containers; in some cases, algorithms are necessarily container-specific and thus cannot be decoupled.

What are the advantages of Iterator pattern?

Iterator Pattern: Advantages

The code is easier to use, understand and test since the iterator uses the Single Responsibility and Open/Closed SOLID principles. The Single Responsibility Principle allows us to clean up the client and collections of the traversal algorithms.