Write me a JAVA code according to this:

Project Description:

This project aims to develop a Stock Management System using Java, focusing on the principles of Object$-$Oriented Programming $($OOP$).$ Students are expected to apply OOP concepts such as inheritance, encapsulation, and polymorphism to build a comprehensive and functional system.

Objective:

The primary objective of this Stock Management System is to offer a platform for businesses to maintain and track their inventory levels, sales, supplies, and product information effectively. This system should help in automating the inventory tracking process, reducing manual errors, and providing up$-$to$-$date stock information.

Features to Implement:

$$ Product Management:

o Ability to add new products, including details such as product ID$,$ name, description, price, and stock quantity.

o Functionality to update and delete existing product information.

$$ Inventory Tracking:

o Real$-$time tracking of stock levels.

o Alerts for low stock levels.

$$ Sales Management:

o Record sales transactions.

o Update stock levels based on sales.

o Generate sales reports for analysis.

$$ Supplier Information Management:

o Maintain supplier details.

o Track purchases from suppliers.

$$ Search Functionality:

o Enable searching for products by name, category, or ID$.$

o Filtering options to view sales based on suppliers or customers.

$$ Object$-$Oriented Design:

o Apply OOP principles to design the system.

o Use inheritance to promote code reuse and reduce redundancy.

$$ Data Storage: o Implement file handling or databases to store product, sales, and supplier information.

$$ Documentation: o Include UML diagrams to represent the system's object$-$oriented structure.

$$ Additional Notes:

o Developing a Graphical User Interface $($GUI$)$ is optional. However, a well$-$designed console$-$based interface is required.

o Focus on writing clean, readable, and well$-$documented code.

o Apply best practices in software development to ensure the system is maintainable and scalable.