Join Our Community

Login Register

100% Free YouTube Course Beginner Friendly

Core Java (21 Version) Free Course

Explore Java 21 with a complete Core Java learning path — covering Java fundamentals, OOPs, Arrays, Strings, Exception Handling, Collections, Generics, and modern Java 21 features. Learn Java programming step by step with practical examples and easy-to-follow lessons, and build a strong foundation for professional Java development and backend programming. No fees. No signup. Just learn.

4+ Chapters

37+ Videos

15+ hrs Content

26,000+ Students

Start Learning Now Visit YouTube Channel

Core Java 21 Version

This course is completely FREE

4+ chapter-wise videos
Digital notes
Deep concepts
No login required
Learn at your own pace

★★★★★ 4.9

Curriculum

Chapter-Wise Learning

Click any chapter to expand. Watch videos & open notes for each topic.

4+ Chapters

37+ Videos

15+ Hours

01

Java Introduction

9 Videos Notes

Java Introduction

Install Java JDK 21 on Windows

How to install IntelliJ Idea on Windows

How to install Eclipse IDE on Windows

How to install VS Code and Run Java Program

What is JDK, JRE & JVM in Java

Java Program Structure (First Java Program)

Java First Program using CMD

Java Practice Questions - 1

Video Notes Soon

02

Java Fundamentals

6 Videos Notes

Data Types (Primitive & Non-Primitive)

Variables (Local, Instance & Static Variables)

Literals (Examples & Best Practices)

Operators (Categories)

Keywords

Identifiers with Examples

03

Control Statements

8 Videos Notes

Control Statements Introduction & Conditional Statements (if, if-else, switch)

Video Notes 1 Notes 2

Looping Statements (for, while and do-while)

Jump Statements (break, continue & return)

How to take user input in Java

Programs - Swap Two Numbers & Fibonacci Series

Video Notes 1 Notes 2

Programs - Reverse & Palindrome Number

Video Notes 1 Notes 2

Programs - Check Number is Prime or Not; Print all Prime Numbers between 1-100

Video Notes 1 Notes 2

Star Patterns Logic

04

Object Oriented Programming (OOP's)

14 Videos Notes

OOP's Introduction; Class, Methods & Objects in Java

Video Notes 1 Notes 2

Constructors in Java

Java Classes Relationship; Association (HAS-A), Dependency (USES-A), Inheritance (IS-A)

Inheritance Introduction; Types with Examples

Video Notes 1 Notes 2

Polymorphism (Part 1) - Compile Time Polymorphism (Method Overloading)

Polymorphism (Part 2) - Runtime Polymorphism (Method Overriding)

Abstraction (Abstract Class & Abstract Methods)

Interfaces in Java

Encapsulation in Java (Bank App Example with Interview Questions)

"this" Keyword + Interview Questions

"super" Keyword + Interview Questions

Final Keyword (final variables, methods & Classes)

OOP's Interview Questions

Video Notes Soon

"static" Keyword in Java (Static variables, methods, blocks and nested classes)

This course is currently in progress. More videos will be added soon, so stay tuned!

Level Up

Want to go further?

This free course covers the fundamentals. For live projects, AI integration, placement support, and a verified certificate — upgrade to our professional Core Java with AI course.

5+ Projects Placement Support Certificate Doubt Sessions

Explore Professional Course Back to Free Courses

Hello Coder, how can I help you ?