Java OOPs Fundamentals: Inheritance and Composition

Object-oriented programming is the backbone of robust software design, yet many developers struggle with choosing the right relationship between classes. This text-based course guides you through the foundational concepts of Java OOPs, focusing on the critical differences between inheritance and composition. You will start with the absolute basics of class structures, constructors, and the object lifecycle before moving on to practical architectural decisions. By the end of this course, you will understand how to design clean, reusable, and maintainable Java applications. You will gain the confidence to analyze software requirements and choose the correct relationship model for any programming scenario. What you'll learn: - Understand the core principles of Object-Oriented Programming and basic Java class structures - Implement the Is-A relationship using class inheritance and method overriding - Design flexible systems using the Has-A relationship through object composition - Configure constructors and manage object initialization in complex class hierarchies - Apply modern Java features like records and sealed classes to control inheritance - Choose between inheritance and composition to write decoupled, testable code The course begins with foundational definitions of classes and object creation, building up to inheritance hierarchies and composition patterns. You will then explore real-world design scenarios, studying how these relationships impact code maintenance and system architecture. This course is designed for beginner Java programmers, computer science students, and self-taught developers who want to transition from writing basic scripts to designing structured object-oriented applications. No advanced programming experience is required. Start reading today to build a solid foundation in professional Java design.