The Java LinkedList Class: A Comprehensive Guide
The LinkedList class in Java's Collections Framework is a powerful and flexible implementation of both the List and Deque interfaces. Unlike ArrayList, which is a dynamic array, LinkedList is a doubly-linked list structure. This fundamental difference dictates its performance characteristics and ideal use cases. What is a Doubly-Linked List? A LinkedList stores its elements in individual nodes. Each node contains three parts: The data (the element itself). A pointer to the next node in the sequence. A pointer to the previous node in the sequence. Because it is a doubly-linked list, traversal can happen in both forward and backward directions. Internal Structure Visualization HEAD TAIL ↓ ↓ [null|Data1|→] ↔ [←|Data2|→] ↔ [←|Data3|null]