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[FEATURE REQUEST] Add Stack Implementation Using Linked List in Java #6715

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awaiting triageAwaiting triage from a maintainer
@Ayush41

Description

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📝 Description

The current /stacks directory in the repository includes various stack algorithms and implementations (e.g., using two queues, min stacks, postfix/prefix evaluation, etc.), but it lacks an implementation of a Stack data structure using a Linked List.

I would like to contribute a clean, well-documented implementation of StackUsingLinkedList.java under the /stacks package.

💡 Proposed Solution

Implement a StackUsingLinkedList class that supports the following standard stack operations:

  • push(T data) – insert an element onto the stack
  • pop() – remove and return the top element
  • peek() – view the top element without removing it
  • isEmpty() – check if the stack is empty
  • size() – return the number of elements in the stack

Implementation Details

  • Use a singly linked list (with a Node inner class) to store elements.
  • Ensure O(1) time complexity for push and pop operations.
  • Follow the repository’s naming conventions and JavaDocs style comments.
  • Include a small main method or test snippet demonstrating the functionality.

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