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One clear path for B.Tech students and people moving into backend work: learn Java, master DSA, build backend applications and get ready for technical interviews. Short lessons in simple English, with practice in every one.
A free account opens every published lesson. Or try a free lesson first
public class Hello { public static void main(String[] args) { System.out.println("Hello, World!"); }}Java Basics · Getting Started
What is Java?
The programme
One clear path from your first line of Java to solving placement coding rounds, building backend applications and facing technical interviews.
Build your programming foundation
Write Java programs from zero, model real things with classes and objects, manage data with collections, and keep your code on GitHub.
Become a confident problem solver
Learn to break down unfamiliar problems, master the core data structures and algorithms in Java, and solve coding rounds under time pressure.
Develop strong core Java skills
Go beyond the basics: streams and modern Java, files and robust error handling, multithreading, and how the JVM runs your code.
Become a Java backend developer
Store data in databases, connect Java to them, build REST APIs with Spring Boot and protect them with authentication.
Learn professional software engineering
Test and debug with confidence, apply design patterns, ship with Docker and CI/CD, reason about system design and complete real projects.
Prepare for your first software job
Revise Java for technical interviews, practise placement assessments, prepare core CS subjects and present yourself with confidence.
How you learn
Each lesson has five parts: Learn, MCQ, Practice, Interview and Summary. Try them below on a real free lesson.
Java Basics · Getting Started
What is Java?
Short sections in simple English, then worked examples. Each example shows exactly what it prints and how it works, line by line.
Output
Hello, World!
How it works
System.out.println prints the text inside the double quotes.public static void main(String[] args). Newer Java versions also support simpler forms, which we can explore later.Riya writes Marks.java and compiles it. Which file does the compiler make?
Put these three steps in the right order: (a) the JVM runs the bytecode, (b) you write Hello.java, (c) the compiler makes Hello.class.
Expected output
b, c, a
Is Java the same as JavaScript?
Say your answer out loud first, then compare.
.java code into bytecode (a .class file).You can now explain what Java is, where it is used and how the JVM runs your code.
Sections end with mini projects. Build each one milestone by milestone, push it to your GitHub and submit the repository link.
Finishing lessons, answering questions and submitting projects earns XP. See where you stand on the leaderboard.
Finished lessons, your answers and where you stopped sync to your account, so you continue on any device.
The first lessons set up the JDK and an editor with you. Then you write and run every program yourself.
Your dashboard shows a daily streak, your recent activity and the next lessons, so it is easy to pick up again.
Who it's for
The path is the same for everyone. Where you join it depends on what you already know.
Java first. We are building this one programme properly, stage by stage. Other languages will come later, made the same way.
FAQ
Java Developer & Placement Programme
A free account opens every published lesson.