Update README.md

Author: Kamalisingaravelan

README.md

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-# Inventory_Management_System_Using_JAVA-Collection_Framework
+<img width="761" height="193" alt="image" src="https://github.com/user-attachments/assets/9e0043b0-d7e5-4a23-9b44-47edb83f1318" /># Inventory_Management_System_Using_JAVA-Collection_Framework
 A Java-based Inventory Management System implemented using Collection Framework for storing and managing product details
+
+# Inventory Management System (Java)
+
+A **Java-based CLI application** that manages inventory details such as products, quantities, and prices.  
+This version uses **Collection Framework** to store and process data efficiently.
+
+## Project Structure
+- Model: Product, Supplier, Sale, Saving
+- Repository: Handles data storage using lists
+- Service: Business logic for inventory, sales, suppliers, savings
+- Controller: Connects service with main UI
+- Main: Provides console-based menu
+- Thread: SaleProcessingThread handles sales asynchronously
+
+
+## System Workflow 
+- User adds products and suppliers
+- User makes a sale by selecting a product and quantity
+- SaleProcessingThread processes the sale
+- Stock quantity is updated
+- Sale details and total savings are recorded
+- User can view reports via menu
+
+
+## Features
+- Add new products to the inventory
+- Update product details (quantity, price)
+- Delete products
+- Search products by name or ID
+- Sales processing handled in a separate thread
+- User-friendly CLI menu system
+
+- ## Tech Stack
+- Java (Core, MVC, OOP, Multithreading)
+- Collection Framework (`ArrayList`, `HashMap`, etc.)