Combined Training Java 21 + 25: Virtual Threads, Stream Gatherers & All New Features Since Java 17

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:

• Modernes Java – Verständlicher Code durch aktuelle Sprachfeatures
• Skalierbare Java-Systeme mit Virtuellen Threads & Structured Concurrency

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 schulung@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.

Ideally, you’re familiar with Java 17. If you’ve worked with Java 11, you’ll be able to follow along just fine – the most important differences are put into context during the course. In general, I recommend at least two years of hands-on experience with Java.

All participants need an up-to-date IDE with at least Java 25 – I use IntelliJ IDEA myself. Java 25 or later should also be installed in the terminal, as we’ll run some of the exercises there.

Each day has six hours of net training time – usually with two short breaks and a longer lunch break in between. 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, that’s no problem. Dropping topics or weighting them differently – as long as I don’t have to restructure the training materials, there are no extra costs.

If you need more extensive changes – for example, combining content from different courses or adding entirely new topics – I’ll be happy to prepare an individual offer.

Within the existing agenda, the weighting can be adjusted: shortening topics, setting priorities, changing the order. That’s free of charge.

Beyond that, more far-reaching adjustments are possible – such as combining content from different courses or completely new topic blocks. This involves extra effort, so I’ll prepare an individual offer for it.

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.

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.