Core Java Basics — Complete Guide for Absolute Beginners
Welcome to Core Java Basics — the first hands-on module in our Complete Java Tutorial Series. This module takes you from zero programming experience to writing real Java programs, covering everything from installation to recursion across 26 structured chapters.
By the end of this module, you’ll be comfortable writing standalone Java programs, understanding how Java works under the hood, and ready to tackle Object-Oriented Programming in Module 2.
What You’ll Learn
| Area | Chapters | Topics |
|---|---|---|
| Getting Started | 1–3 | What is Java, why learn it, prerequisites |
| Installation & Setup | 4–7 | Install JDK on Linux/Windows/Mac, choose an IDE |
| First Programs | 8 | Hello World — compile, run, understand |
| Variables & Data | 9–11 | Variables, data types, type casting |
| Operators & I/O | 12–15 | Operators, print, input, comments |
| Control Flow | 16–21 | Booleans, if/else, switch, loops, break/continue |
| Methods | 22–24 | Functions, variable scope, recursion |
| Code Quality | 25–26 | Clean code, debugging basics |
Chapter Index
| # | Chapter | Link |
|---|---|---|
| 1 | Introduction to Java | Read → |
| 2 | Why Learn Java? | Read → |
| 3 | What You Should Know Before Starting | Read → |
| 4 | Installing Java on Linux | Read → |
| 5 | Installing Java on Windows | Read → |
| 6 | Installing Java on Mac | Read → |
| 7 | Choosing an Editor or IDE | Read → |
| 8 | Hello World — Your First Java Program | Read → |
| 9 | Java Variables | Read → |
| 10 | Java Data Types | Read → |
| 11 | Java Type Casting | Read → |
| 12 | Java Operators | Read → |
| 13 | Java Print Output | Read → |
| 14 | Java Taking User Input | Read → |
| 15 | Java Comments | Read → |
| 16 | Java Boolean Expressions | Read → |
| 17 | Java if…else Statements | Read → |
| 18 | Java switch Statement | Read → |
| 19 | Java for Loop | Read → |
| 20 | Java while and do-while Loop | Read → |
| 21 | Java break and continue | Read → |
| 22 | Java Methods (Functions) | Read → |
| 23 | Java Variable Scope | Read → |
| 24 | Java Recursion | Read → |
| 25 | Writing Clean and Readable Code | Read → |
| 26 | Java Debugging Basics | Read → |
Prerequisites
You don’t need any programming experience to start this module. All you need is:
- A computer (Windows, macOS, or Linux)
- An internet connection (to download JDK)
- 30–60 minutes per chapter
- Curiosity and willingness to type every code example
How to Study This Module
- Read chapters in order — each builds on the previous one
- Type every code example — don’t copy-paste, typing builds muscle memory
- Run every program — see the output, experiment with changes
- Complete the exercises — they reinforce what you just learned
- Don’t skip installation — a working setup is essential
Ready to begin? Start with Chapter 1: Introduction to Java →
