Concurrent Java code is often hard to read, error-prone, and difficult to debug – whether it’s written with CompletableFuture, reactive frameworks, or traditional thread pools. With Virtual Threads, Structured Concurrency, and Scoped Values, Java finally offers a way to change that: simpler, more scalable, more maintainable.
In just one day, this course enables your team to use the new threading model confidently and profitably – clearly explained and directly applicable.
Virtual Threads, Structured Concurrency, and Scoped Values – with Project Loom, a new threading model is entering the Java world that makes concurrency simpler, clearer, and more scalable.
In this one-day training, you’ll learn how to build robust and high-performance applications with Project Loom – without having to wrestle with complex reactive frameworks, CompletableFuture chains, or cumbersome ExecutorService constructs. Instead of hard-to-read code, you’ll write clear, linear flows – with excellent scalability.
We start with the fundamentals: Why was Project Loom even necessary? What do Virtual Threads really offer – and where are their limits? You’ll learn how they work, what to watch out for, and how to integrate them effectively in Spring and Jakarta EE applications.
Next, you’ll dive into Structured Concurrency, still a preview feature in Java 21 – an API-based model that makes parallel tasks more structured, fault-tolerant, and maintainable. You’ll understand how task scopes work, how to handle cancellation, errors, and join strategies – and how to encapsulate concurrent processes in a clean, reusable way.
The course wraps up with Scoped Values, also a preview feature in Java 21 – a modern, thread-safe alternative to ThreadLocal, designed to fit seamlessly into the new threading model.
As always, the course is highly hands-on: You’ll work with plenty of code examples and exercises that help you apply what you learn directly in your own projects.
This course is aimed at Java developers who want to implement modern concurrency in their applications in a maintainable and efficient way – without diving into the complexity of reactive frameworks.
Perfect for teams developing high-performance server applications – and looking to replace traditional threading models with simpler, scalable, and more maintainable alternatives – whether with Virtual Threads, Structured Concurrency, or Scoped Values – with immediate benefits for code readability, scalability, and debugging.
We’ll cover the topics with a practical focus and a balanced mix of theory and hands-on exercises – so you can immediately understand and apply the concepts to your own applications.
Introduction to Project Loom:
CompletableFuture or reactive frameworksVirtual Threads:(Background knowledge: Virtual Threads in Java – Deep Dive with Examples)
Structured Concurrency (Preview):(Background knowledge: Structured Concurrency with StructuredTaskScope)
StructuredTaskScopeScoped Values (Preview):(Background knowledge: Scoped Values in Java)
ThreadLocalStructuredTaskScopeConclusion & Outlook:
The agenda isn’t set in stone: we can align the focus, date, and format with your team.
Request now – no obligationI’ve been working with Java for 30 years – as a developer, CTO, trainer, author, and speaker.
In that time, I’ve helped companies modernize complex Java systems, write performant code, and develop their teams sustainably.
With HappyCoders.eu, I’ve built one of the most widely read Java blogs in the German-speaking world, and I regularly speak at conferences and user groups.
My goal: to teach complex topics in a way that is understandable, practical, and immediately applicable.
100 % of the participants who answered would recommend my training – 82 % without reservation.
More about meSven Woltmann of HappyCoders visited us to test and understand the new features around Java 25 together.
For two days, we worked intensively on Unnamed Variables & Patterns, Stream Gatherers, Scoped Values, the Foreign Function & Memory API, and performance topics such as virtual threads without pinning.
A big thank you to Sven for the excellent preparation, the clear didactics, and the deep technical expertise. That was a training exactly to our taste.
Content and presentation nearly flawless. I enjoyed listening throughout, learned new things, and had fun doing it.
Your confidence in answering questions along the way was impressive.
I found the trainer easy to listen to, and it never got boring. I understood the explanations well. Sven answered questions quickly and corrected errors in the worksheets on the spot.
A comprehensive training, with a trainer who knows what he is talking about. And when he doesn’t know, he looks it up right away or follows up with the answer shortly after.
Anyone who understands Java can easily follow this training. The exercises are well thought out and focused on the essentials.
A knowledgeable trainer. Good structure, practical examples. Compact, and the concepts get explained. Good, comprehensible exercises.
The overall package was very coherent and always tailored to us.
A good, in-depth overview of all relevant Java features since Java 8, and the opportunity to try all of these features out yourself.
The talk was broken up by fitting exercises. Good presentation. Our questions were taken up.
Very practical and good exercise examples.
Quick to respond to questions – a very flexible trainer.
A compact overview of how Java has evolved. A lot of input, much of which you can apply directly.
Very good repo with explanations + exercises in one place.
Pace + depth: top-notch. A very pleasant mix of theory and practice.
A complex topic broken down superbly.
All the important news from Java 9–25 was well explained.
This training can only be booked for teams. If you’d like to attend as an individual, I offer two courses (in German) through ppedv:
Both are possible: I can come to your company for an on-site training – anywhere in Germany, Austria, and Switzerland – or we run the training online, usually via Zoom.
I recommend a maximum of 12 participants per training – that way I can give everyone individual attention. There is no minimum: I charge per training, not per person.
The easiest way is the request form or an email to training@happycoders.eu. Right after submitting, you can book a video call via Calendly, where we discuss the details. You’ll then receive a concrete offer from me.
You should be familiar with the basics of concurrency in Java – that is, Thread, Runnable, and ideally ExecutorService. Experience with CompletableFuture or reactive frameworks is helpful, but not a must. You don’t need to know Project Loom itself in advance – that’s what the course is about.
All participants need an up-to-date IDE with Java 21 – I use IntelliJ IDEA myself. Java 21 should also be installed in the terminal, as we’ll run some of the exercises there. A later Java version won’t do here: the exercises use preview features of Java 21, and code with preview features only runs on exactly the Java version it was compiled for.
A training day consists of four 90-minute modules – six hours of net training time in total. Each module alternates between theory and practice two to three times, so you apply what you’ve just learned directly to code. There’s a short break between the first and second and between the third and fourth module, and a longer lunch break between modules two and three. We align the exact schedule with your working hours – that’s flexible.
About half theory, half practice: a short theory phase is followed directly by applying it to code – with examples from real projects. Listening alone doesn’t help much; the knowledge has to be used immediately for it to stick.
Yes – shortening topics, weighting them differently, changing the order, or combining content from different courses: I’m happy to adapt the agenda to your team. Since that means reworking the training materials, it involves extra effort – I’ll prepare an individual offer for you.
We usually use Zoom. If you prefer your own platform – for example, Microsoft Teams or Google Meet – I’m happy to work with that. Just let me know in advance.
Yes. Before the training, you’ll receive the exercises as a Git repository so you can get started right away. After the training, you’ll also receive the slides – including all solutions to the exercises.
Yes. All participants receive a certificate of attendance after the training.
Travel expenses are charged as a flat rate – depending on the training location and the number of overnight stays required. The exact amount is part of the individual offer I’ll send you.
Yes. For multiple booked trainings or follow-up bookings, I can offer a volume discount. We’ll discuss this in the video call, and I’ll include it in the offer.
Just write to me – I usually reply within one business day.
Or book a free video call right away, and we’ll discuss everything important.