😎 Add Data Structures Code in Java

[sudo-parnab]

Description:

We are looking to expand our repository with implementations of important data structures in Java. If you're proficient in Java, consider contributing your implementation of one or more data structures (e.g., Stack, Queue, LinkedList, Binary Tree, Graph, etc.).

Requirements:

• Code should be well-commented for easy understanding.
• Include relevant test cases demonstrating the usage of the data structure.
• Ensure code adheres to Java best practices.

Feel free to pick any data structure that isn't already implemented or improve the existing ones.

[mdfarmansayeed]

@sudo-parnab pls assign this to me

[sudo-parnab]

open a new issue according to your code