“The course structure saved me weeks. I recommend it to any dev who wants to level up.”
Sarah M.
Backend developer, Paris
Popular
Fundamentals
Java Core Fundamentals
4.9(127 reviews)
4-6 weeks
Beginner
49,00 €one-time payment
This course lays the essential foundations for any serious Java developer. You will master types, collections, streams, records, and the most used design patterns in production. Each concept is illustrated with hands-on exercises and guided labs. Ideal to start clean or consolidate before moving to advanced modules.
Technologies
Java 21JUnit 5IntelliJ IDEA
What you will learn
Types, generics, and modern collections
Streams API and functional programming
Records, sealed classes, and pattern matching
Practical design patterns (Builder, Factory, Strategy)
12 guided labs with solutions
Downloadable checklists and reference sheets
Reviews
What learners say
“The labs are at the right level — no copy-paste, you actually think. Exactly what I was looking for.”
James K.
Fullstack dev, London
“I had a technical interview the week after. The concepts really stuck.”
Yuki T.
Tech lead, Lyon
“Pro-level training, no fluff. The checklists and project code are my go-to reference.”
Léo D.
Java developer, Brussels
