Java courses
Master Java with 5 hands-on courses built by working backend engineers. Learn by building real projects, earn a shareable certificate, and level up at your own pace.
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Recommended for Java beginners
Curated by working backend engineers to get you building fast.
Java Essentials
This is a summarized module about Core Java Basics, Object Oriented Programming, Java syntax, and concepts such as variables, data types, arrays, strings, functions, control flow in Java, error handling, etc.
Become A Java + Spring Backend Engineer
All-in-one Java and Spring course for learning backend engineering with Java. This comprehensive course is designed for Java developers seeking proficiency in Java.
Browse Java courses and tracks
Spring Framework & Spring Boot
Master the Spring ecosystem from fundamentals to advanced concepts and learn how to build scalable, production-ready backend systems using Spring Framework and Spring Boot. This course covers Dependency Injection, Spring modules, REST development, data persistence, and modern enterprise development practices used in real-world Java applications.
Unit Testing in Java
You will learn the importance of unit testing, the principles of Test-Driven Development (TDD), how to write test cases using JUnit, how to utilize advanced JUnit features like parameterized tests and test suites, and how to implement mocking with Mockito.
Design Patterns in Java
You will learn the significance of design patterns and how to apply key Creational, Structural, and Behavioral patterns to create robust, maintainable, and scalable software solutions.
Advanced Java
The Advanced Java course is designed to enhance your understanding of Java by exploring more complex topics, including collections, I/O streams, build tools, and multithreading. You’ll learn how to use these advanced features to write optimized, maintainable, and scalable Java applications.
Java Essentials
This is a summarized module about Core Java Basics, Object Oriented Programming, Java syntax, and concepts such as variables, data types, arrays, strings, functions, control flow in Java, error handling, etc.
Ready to apply your Java skills?
Build real-world projects and add them to your portfolio.
Build a Real-time AI Chat Application
Build a real-time AI chat application in Go that streams LLM responses token by token from a locally running Ollama instance, using Server-Sent Events (SSE) on the backend and a clean fetch() + ReadableStream frontend.
Build Your Own Blogging API
This project involves building a simple blogging API where users can sign up for an account, create blog posts, interact with other users, comment on posts, and follow their favorite bloggers.
Build Your Own To-Do List API
The "Build Your Own Simple To-Do List API" project aims to develop a straightforward yet effective API that enables users to manage their daily tasks efficiently.
Build Your Own Weather API
The "Weather API" project aims to develop a comprehensive API that provides weather forecasts, and weather alerts, and supports user preferences for units of measurement.
Online Marketplace API: Build Your Own Craigslist
The "Build Your Own Online Marketplace Platform" project aims to develop a scalable and efficient API that allows users to list products, browse and purchase items, manage their accounts, and handle transactions securely.
E-Learning API: Build Your Own Coursera
The "Build Your Own E-learning Application" project aims to develop a scalable and efficient API that allows users to explore courses, enroll in them, complete assignments, and manage their learning progress.
“I truly appreciate the high-quality material in this course. The structured lessons, hands-on projects, and clear explanations make learning a great experience. I look forward to future additions and updates! Thanks for your polite and friendly attitude.”
Lyle Christine
A Happy Student from Scotland
“The practical examples and hands-on exercises were particularly beneficial. They not only reinforced the theoretical concepts but also allowed me to apply them in real-world scenarios. The inclusion of best practices and common pitfalls added a practical dimension to the learning process.”
Daniel Tinivella
Software Engineer, Globant
“The course is an excellent resource for beginners. Your explanations of the basics are clear, making it easy for newcomers to grasp. I particularly enjoyed the task management application; it's a practical example that helps solidify the concepts.”
Eshan Shafeeq
Blockchain & Web3 Engineer, Cake Defi
FAQs
You'll go from fundamentals to production-ready Java skills through short lessons and hands-on projects you build yourself.
Most tracks start at a basic level. Pick a Basic course to begin, or jump to Intermediate/Advanced if you already know the fundamentals.
Yes — complete a course and you'll earn a certificate you can add to LinkedIn, your resume, and your performance reviews.
Each course lists its duration in hours. Learn at your own pace — start free and upgrade any time.