About this video

• Video Title: DoublyLinkedList - Intro
• Channel: Professor Rosen
• Speakers: Professor Rosen
• Duration: 00:03:56

Overview

This video introduces the concept of a Doubly Linked List, explaining how it differs from a Singly Linked List and outlining its basic structure and instance variables. The presenter explains that while not significantly more complex, a Doubly Linked List requires tracking additional variables and pointers.

Key takeaways

• Doubly Linked List Structure: A Doubly Linked List node includes a data field, a next pointer, and a new previous pointer, allowing traversal in both forward and backward directions.
• Node Class Implementation: The Node class is defined as a private static inner class within the DoublyLinkedList class, allowing each class to have its own internal Node implementation without naming conflicts.
• Instance Variables: Key instance variables for a Doubly Linked List include head (pointing to the first node), tail (pointing to the last node), and size (tracking the number of elements).
• Pointer Management: Operations like adding and removing elements in a Doubly Linked List require updating more pointers than in a Singly Linked List, specifically accounting for both next and previous references.