Java Annotated Monthly – June 2025

Hi there, Java fans! It’s a new month, which means we’ve got a new batch of hot news, deep dives, and tasty tidbits from the Java world for you to enjoy. In this edition, Piotr Przybył joins us in the Featured Content section to share his cultivated list of content finds. We’re also testing a […]

Jun 7, 2025 - 03:20

Hi there, Java fans! It’s a new month, which means we’ve got a new batch of hot news, deep dives, and tasty tidbits from the Java world for you to enjoy. In this edition, Piotr Przybył joins us in the Featured Content section to share his cultivated list of content finds. We’re also testing a new, more concise format that is faster to read but still packed with value. Let us know if you like it or miss the old style.

Ready? Let’s go!

Featured Content

Piotr Przybył

Piotr Przybył – Notorious engineer at work and after hours, tracing the meanders of the art of software engineering. Remote Software Gardener, mostly working in web-oriented Java gardens. Java Champion. Testcontainers Champion. Programming usually in Java (since 1.3), Scala, and Go, but in other languages too. A fan of agility, seen mostly as choosing the right tools and approaches after asking the right questions. Developer, trainer, and conference speaker, currently working for Elastic as a Senior Developer Advocate.

Greetings, fellow Java developers! It’s a pleasure to be here. It’s exciting to be in the Java community, for a language that celebrated its 30th anniversary, which has been proclaimed to be dead so many times, and it’s still doing surprisingly well. We can see that with all the exciting stuff happening around Java 25, and changes in the ecosystem at large.
I’m humbled and honoured to be here. It’s great to see the community and the ecosystem evolve, especially given that I’ve been a part of it since (checks notes…) 2003 ;-)

I was first exposed to Java at my alma mater, Wrocław University of Science and Technology. Recently, there’s been one more reason to be a proud alumnus: “Odra 5”!
“Odra 5” is the name of Poland’s first quantum computer, recently launched at the Wrocław University of Science and Technology. It’s a five-qubit machine, developed by Finnish company IQM Quantum Computers, that represents a significant milestone in the advancement of quantum computing in Central and Eastern Europe. I find the name cute and not without meaning for local IT history fans. You can read more about it here at the University’s official page. Also, “Odra” is the Polish name for the Oder river, and… computers manufactured in Wrocław in the 1960s.

Let’s get back from general Computer Science to Java. Unless you have been living in total wilderness, I think you might have heard a thing or two about the AI (r)evolution happening recently. ;-) Contrary to some rumours, Java is a very decent language that benefits from improvements in this area, and with the release of Spring AI 1.0, things will get even easier! The article by Josh Long, Philipp Krenn, and Laura Trotta (I know, and have lots of respect for all of them) will let you understand how to start with your own RAG quickly, benefiting from features of Spring AI, Elasticsearch, and more. Oh, and if you’d like to learn more about stuff like vector search or searching in general, AI, and so on, Elasticsearch Labs might be a good place to start.

Speaking about Java itself, there’s of course the 30th anniversary of Java! It’s a big thing, although it might be disturbing to some that the language that keeps dying is still pretty much alive and actively developed. Right now, there are 17 active Java Enhancement Proposals targeting Java 25, which in my opinion proves that despite its size and legacy, the Java ecosystem is still evolving fast. I couldn’t resist, and wrote about Java’s Structured Concurrency, Elasticsearch Java client, DevEx, and a Developer Advocate’s job on my personal page, touching on all of this.

I think that some reasons why our ecosystem is still robust are that we can learn from our past mistakes. While some of them are irreversible, many of them can shape how we think and evolve our systems and our daily jobs. A great example is the Allegro folks sharing how to avoid mistakes in Gradle, because with flexibility comes responsibility. And also, our tech stack and our jobs are not only the language, the SDK, the frameworks, and build/CI/CD tools, but predominantly our mindset. That’s something we shall all keep improving!

Java News

Check out the most recent news from the Java world:

Java Tutorials and Tips

Learn new things and enjoy unique insights from industry experts:

Kotlin Corner

Everything you might have missed about Kotlin in May:

How to Use Kotlin Notebooks for Productive Development
Structuring Ktor Projects Using Domain-Driven Design (DDD) Concepts
Kotlin LSP – The launch of the pre-Alpha Kotlin LSP and VS Code plugin.

AI

Learn more about the most recent AI news, innovations, problems, and predictions:

Languages, Frameworks, Libraries, and Technologies

Get to know programming technologies and frameworks better:

Conferences and Events

Here are some of the must-attend online and offline events in June:

IntelliJ IDEA Conf – Online, June 3–4
J-Spring – Utrecht, Netherlands, June 5; Anton Arhipov is a speaker.
Le Paris JUG Java Day – Paris, France, June 5
JConf Méx – Nuevo México, Mexico, June 7
Devoxx Poland – Krakow, Poland, June 11–13; Anton Arhipov and Marit van Dijk are the speakers.
DevConf – Brno, Czechia, June 12–14
JSail Unconference – Hemelum, Netherlands, June 23–27
Voxxed Days Luxembourg – Mondorf-les-Bains, Luxembourg, June 19–20

Culture and Community

Take some time to think about the non-tech topics that are of significance to tech people at the moment:

And Finally…

Don’t miss the latest updates from the IntelliJ IDEA team:

That’s it for today! We’re always collecting ideas for the next Java Annotated Monthly – send us your suggestions via email or X by June 20. Don’t forget to check out our archive of past JAM issues for any articles you might have missed!