Abstraction & Polymorphism in Depth | Abstract Class vs Interfaces | Java Full Course #17

In this lecture of the Java Full Course, we dive deep into two of the most important Object-Oriented Programming concepts : Abstraction and Polymorphism. You will learn how abstraction hides complexity, how abstract classes and interfaces work internally, and how Java achieves polymorphism using method overloading and method overriding. We will also understand the difference between abstraction and encapsulation, and explore how static and final methods behave in polymorphism. This lecture builds the core foundation of OOP used in real-world Java development, system design, and backend engineering. Topics Covered ✔What is Abstraction in Java ✔ Types of Abstraction ✔ Low Level vs High Level Abstraction ✔ Abstract Classes Explained ✔ Interfaces in Java ✔ Abstract Class vs Interface (Interview Favourite) ✔ Abstraction vs Encapsulation ✔ What is Polymorphism ✔ Static Polymorphism (Method Overloading) ✔ Dynamic Polymorphism (Method Overriding) ✔ Static & Final Methods in Polymorphism Why Learn Java? Java is one of the most powerful and widely used programming languages in the world. It is used in: Backend development Enterprise applications Android development Banking systems Large-scale distributed systems If you want to master Data Structures, Spring Boot, Microservices, or System Design, Java fundamentals are essential. Join Coder Army Whatsapp Group: https://whatsapp.com/channel/0029Va6H... Join System Design Whatsapp Group: https://whatsapp.com/channel/0029VbBF... Code and Notes: Github : https://github.com/adityatandon15/Jav... We offer paid course on Dsa, web development, blockchain, system design and GenAI. Join our Paid Course: https://strikes.in/ Coder Army: https://coderarmy.in/#home Coder Army app: https://play.google.com/store/apps/de... Connect with Aditya Tandon Instagram :   / adityatandon2   LinkedIn :   / adityatandon2   Twitter : https://x.com/adityatandon02 Timestamps: 00:00 Intro 00:53 Abstraction 11:44 Types of Abstraction 13:22 Low level Abstraction 17:28 High level Abstraction 28:29 Abstract classes 43:40 Interfaces 49:55 Abstract class vs Interfaces 01:02:14 Abstraction vs Encapsulation 01:04:24 Polymorphism 01:05:23 Static Polymorphism 01:09:55 Dynamic Polymorphism 01:16:21 Static & final methods in Polymorphism java abstraction, java polymorphism, abstract class vs interface java, method overloading java, method overriding java, static polymorphism java, dynamic polymorphism java, java oop concepts, java abstraction tutorial, java polymorphism tutorial, abstraction vs encapsulation java, java interface tutorial, java abstract class tutorial, java oop explained, java programming tutorial, learn java programming, java for beginners, java backend development