This module deals with code reusability, method creation, and object-oriented programming principles. You will learn how to refactor code into methods, grasp the concept of the main class, and create utility classes. You will explore inheritance, polymorphism, and encapsulation, focusing on practical applications and benefits. Additionally, the lessons emphasize logical program design, access modifiers, abstract classes, and interfaces to enhance code scalability and maintainability. Through hands-on exercises and real-world examples, you will deepen your understanding of Java programming fundamentals, paving the way for effective software development practices.