Iterator Design Pattern with Java Code Implementation Explained

Iterator is a behavioral design pattern that lets you traverse elements of a collection without exposing its underlying representation (list, stack, tree, etc.). The Iterator design pattern provides a way to access the elements of an aggregate object sequentially without exposing its underlying representation. The Iterator is one of the simplest and most frequently used of the design patterns. The Iterator pattern allows you to move through a collection of data using a standard interface without having to know the details of the internal representations of that data.

** Where to use Iterator Design Pattern **
1. Where ever we need standard way to traverse through a group of Objects.
2. Where ever we want to traverse elements of a collection without exposing its underlying representation.
3. Where ever we want to add more traversal algorithms to the collection and want to keep traversal logic separate from collection.

** Advantages of Iterator Design Pattern **
1. The same iterator can be used for different aggregates.
2. Different iterator algorithm can be used on the same collection at the same time.
3. Allows you to traverse the aggregate in different ways depending on your needs.
4. It encapsulates the internal structure of how the iteration occurs.
5. Don't need to bloat your class with operations for different traversals.

** Topics Covered **
1. Recap of Interpreter Design Pattern
2. Introduction of Iterator Design Pattern
3. Usage of Iterator Design Pattern
4. Example of Iterator Design Pattern
5. Java Code Implementation of Iterator Design Pattern
6. Advantage of Iterator Design Pattern
7. Summary of Iterator Pattern

#iteratorpattern #iteratordesignpattern #designpatterns

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** Acronyms **
OOP – Object Oriented Programming Languages
GOF – Gang of Four Design Pattern
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