About JavaAtlas

JavaAtlas is a free place to learn Java, from your first program to Spring Boot and microservices. You don't need an account to read any lesson.

What you’ll find here

Free lessons covering the whole language and its ecosystem: fundamentals, object-oriented programming, collections, modern Java, data structures and algorithms, design, testing, concurrency, JPA, Spring and microservices.
Learning paths that put lessons in order for a goal, from complete beginner to interview preparation.
A guide to every Java version and what it added, with an upgrade planner.
Interview questions with answers, and quizzes in every lesson.
Paid courses for learners who want to go deeper with projects.

How lessons are written

Every lesson says which Java version its code needs, so what you learn matches the code you’ll meet at work. Lessons explain the idea simply first, then the details, then the traps and interview questions. We update them as new Java versions ship every March and September.

How the site is funded

Lessons stay free. The site is supported by paid courses and by advertising on free pages. Learners who buy a course don’t see ads.

Who runs it

JavaAtlas is operated by Your Company Name, Your City, State, India. Write to us at admin@javaatlas.com.

Questions? Email admin@javaatlas.com. See also: About, Contact, Privacy, Terms, Refunds.