Beginner ~18 hours 25 lessons Free

Java Tutorial

Enterprise-grade, object-oriented

Learn Java from the ground up with 25 free lessons. Variables, classes, OOP, inheritance, generics, collections — Java for college students and enterprise jobs.

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What you'll learn

  • Java syntax and basics
  • Object-oriented programming
  • Inheritance and polymorphism
  • Collections framework
  • Exception handling

Prerequisites

  • JDK installed (or use an online compiler)
  • No prior programming experience needed

Why learn Java?

  • Java is the most-asked language in Indian campus placements
  • Powers Android apps and large-scale enterprise systems
  • Strict typing teaches good engineering discipline
  • Decades-stable — your skills stay relevant

Course Curriculum

25 lessons · ~18 hours · self-paced

  1. 1

    Introduction to Java

    What is Java?
  2. 2

    Installing Java & Setup

    Install the JDK, Not the JRE
  3. 3

    Variables & Data Types

    Declaring a Variable, and Why the Type Comes First
  4. 4

    Operators

    Arithmetic, and What % Is Really For
  5. 5

    Strings

    Strings Are Objects, and They Never Change
  6. 6

    User Input & Output

    Reading Input with Scanner
  7. 7

    Conditionals

    if, else if, else — and Why Order Matters
  8. 8

    Loops

    The for Loop, Taken Apart
  9. 9

    Arrays

    One Name for Many Values
  10. 10

    Methods

    Anatomy of a Method
  11. 11

    Classes & Objects

    A Class Describes a Kind of Thing
  12. 12

    Constructors

    Why Constructors Exist
  13. 13

    Inheritance

    The Problem Inheritance Solves
  14. 14

    Polymorphism

    One Reference, Many Behaviours
  15. 15

    Encapsulation

    Hiding Data So It Cannot Go Wrong
  16. 16

    Abstraction & Interfaces

    What Abstraction Means
  17. 17

    Exception Handling

    What an Exception Is, and Why Java Has Them
  18. 18

    Collections Framework

    Why Arrays Are Not Enough
  19. 19

    ArrayList & LinkedList

    How ArrayList Works Inside
  20. 20

    HashMap & HashSet

    How Hashing Actually Works
  21. 21

    File Handling

    Files Make Your Data Survive the Program
  22. 22

    Generics

    The Problem Generics Solve
  23. 23

    Lambda Expressions

    Passing Behaviour, Not Just Data
  24. 24

    Java Best Practices

    Write for the Person Who Reads It Next
  25. 25

    Final Project: Build a Java App

    What You Are Building, and Why This One

From the Blog

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Read more on the blog

Ready to start?

All 25 lessons are free. No credit card. No sign-up required to read.

Start with lesson 1: Introduction to Java
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