⚡ LRU Cache Explained in Java | HashMap + LinkedHashMap

An LRU cache, or Least Recently Used cache, is a data structure that stores a limited number of items and automatically removes the least recently accessed item when the cache is full and a new item needs to be added. This strategy is used to optimize performance by prioritizing the storage of frequently accessed data. What it shows: overriding removeEldestEntry, cache eviction. In this Java tutorial, we implement an LRU (Least Recently Used) Cache using HashMap and Doubly Linked List. ⚡ This is a popular problem asked in coding interviews at top tech companies, testing your knowledge of data structures and efficient algorithm design. 📌 What you’ll learn in this video: What is an LRU Cache? *How to implement caching in Java *Using HashMap for O(1) lookup *Using Doubly Linked List for O(1) insert & delete *Step-by-step code explanation of LRU Cache logic 👉 If you enjoyed this video, don’t forget to LIKE 👍, COMMENT 💬, and SUBSCRIBE 🔔 for more Java tutorials and coding interview problems! #java #LRUCache #datastructures #codinginterview #CacheAlgorithm #hashmap #linkedlists