Mobile App development - 🎓 Lecture 21: OOP Concepts in Java | Classes, Objects, Attributes, Methods & Access Modifiers

Welcome to Lecture 21 of the Java Programming Series on the Edlify YouTube Channel, presented by Bilal Arif, Lecturer at the School of Systems and Technology (SST), UMT Lahore. In this lecture, we dive into one of the most fundamental and powerful paradigms in Java programming — Object-Oriented Programming (OOP). Java is a fully object-oriented language, and understanding classes, objects, attributes, member functions, and access modifiers is critical for writing efficient, reusable, and maintainable code. This lecture is designed to provide a comprehensive understanding of OOP concepts, with practical examples, coding demonstrations, and real-world applications. 🧠 What You Will Learn in This Lecture By the end of this lecture, you’ll have a clear understanding of: Classes in Java: How to define a class, its structure, and its role as a blueprint for objects. Objects in Java: How to create instances of classes and understand their behavior. Attributes (Fields) in Java: Storing the state of an object using variables. Member Functions (Methods) in Java: Defining behaviors and operations for objects. Access Modifiers: Controlling the visibility of class members using public, private, protected, and default access levels. Real-world examples to demonstrate OOP concepts in Java.