LRU Cache Visualizer (Java)

An interactive LRU (Least Recently Used) Cache Visualizer built using Java Swing. This project demonstrates how LRU caching works internally using HashMap + Doubly Linked List with animated colored blocks.

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Preview

LRU Cache Interface

Cache Animation

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Features

• O(1) GET and PUT operations
• HashMap + Doubly Linked List implementation
• Animated colored cache blocks
• MRU → LRU visualization
• Automatic eviction of least recently used item
• Interactive GUI
• Real-time cache updates

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Technologies Used

• Java
• Swing (GUI)
• HashMap
• Doubly Linked List
• OOP

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How It Works

• Most Recently Used items move to front
• Least Recently Used items move to end
• When capacity is full, last item is removed
• GUI updates with animation

Example:

Capacity = 3

PUT 1 PUT 2 PUT 3

Cache: [3] [2] [1]

GET 1

Cache: [1] [3] [2]

PUT 4

Cache: [4] [1] [3]

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How to Run

Compile: javac LRUCacheVisualizer.java

Run: java LRUCacheVisualizer

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Project Structure

LRU-Cache-Visualizer │ ├── LRUCacheVisualizer.java ├── Screenshot1.png ├── Screenshot2.png └── README.md

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Author

Sujal Chouksey GitHub: https://github.com/sujal-09

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License

This project is open-source and available for learning purposes.