#36.1 LinkedHashMap & LRU Cache in Java | Internal Working with Code, Call Hierarchy

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In this video, we explore the internal workings of LinkedHashMap in Java and how it can be used to implement an LRU (Least Recently Used) Cache efficiently. Each topic is explained with code examples, method call hierarchy
to make the concepts easy to understand.

🧠 Topics Covered in This Video :

1️⃣ LinkedHashMap constructors:
Default constructor
Constructor with initial capacity
Constructor with capacity and load factor
2️⃣ LinkedHashMap constructor with access order flag (true/false)
3️⃣ How LinkedHashMap behaves when access order is enabled – with example
4️⃣ Role of the afterNodeAccess() method when access order is true
5️⃣ What is LRU (Least Recently Used) Cache
6️⃣ How to implement LRU Cache using LinkedHashMap – with a working code example
7️⃣ Role of the afterNodeInsertion() method when LinkedHashMap is used as an LRU Cache
🧩 We also demonstrate:
Internal method flow of afterNodeAccess() and afterNodeInsertion()
Entry reordering based on access
Automatic eviction logic in LRU cache
📌 This video is perfect if you're preparing for interviews or building efficient caching systems.
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