The weather in Munich is getting colder, but autumn at #Java User Group Munich is going to be hot 🔥 Spring Boot testing, LLMs, Java and more presented by Java Champions, book authors, and international speakers. More details coming soon!

Deep dive on new #Java 25 features but also API improvements, under-the-hood optimizations, GraalVM, WASM and more 👉 www.jvm-weekly.com/p/java-25-an... by @askowronski.bsky.social #Java25 #JDK25

Another view on what's sleek, cool and green in #Java 25 by @aichalaafia.bsky.social 👉 medium.com/@aichalaafia... #Java25 #JDK25

This is a complete, valid #Java 25 app. It's powered by JEP 512: Compact Source Files and Instance Main Methods authored by Ron Pressler, Jim Laskey and @gavinbierman.bsky.social. More about JEP 512 👉 openjdk.org/jeps/512 #Java25 #JDK25

📜 Opinionated article about what's new in #Java 25 by the legendary Cay Horstmann 👉 horstmann.com/unblog/2025-... #Java25 #JDK25

Did you know you can't really install Open JDK? Open JDK is an implementation of the #Java Platform Standard Edition (Java SE) and distributions like Eclipse Temurin, Azul Zulu, Amazon Corretto etc. are binary builds of Open JDK + some vendor specific stuff.

Did you know that #Java 25 brings 18 new features (JEPs), out of which 12 are final, 4 are in Preview state, 1 in Incubator and 1 Experimental? See the full list at openjdk.org/projects/jdk... #Java25 #JDK25

If you missed it yesterday, watch the #Java 25 Launch Stream at www.youtube.com/live/duIceCX... (starring @nipafx.dev, @billykorando.bsky.social, Ana-Maria Mihalceanu, Stuart Marks and others) #Java25 #JDK25

What day is it today? It's #Java 25 release day! Also it's 16.09.2025 so 16+9=25 and the 2025 ends with 25. Coincidence? I don't think so 😀 #JDK25 #Java25

Beware when asking #AI to explain some #Java snippet or concept. Sometimes it will give you a confident answer with a detailed explanation which sounds plausible but is completely or subtly wrong.

📣 A new video has landed on the #JUG Munich YouTube channel! See how AI helps in specification, implementation and testing at talsen team GmbH ▶️ youtu.be/ce5rHCLU8j0 Author of the talk is Hans Egermeier #java #techtalk #seniordeveloper

Even as #Java developers sometimes we have to write front-end code. Did you know you can write HTML and CSS super fast in @intellijidea.com? The secret is IDEA's built-in support for Emmet which can turn 20-30 characters you type into 10x more HTML. This is how you can use it (🧵 1/6)

You know some #Java haters? They probably think like in this video ▶️ youtu.be/m4-HM_sCvtQ?...

📣 ‼️ JCON Europe 2026 Free Ticket You can get a *free ticket* to the JCON Europe Conference in Köln (Cologne) April 20th until 23rd, 2026. Link is in the comments below 👇 #java #conference #jcon #jcon2026 #seniordeveloper

Prediction & hot take: the richer and more specific your #Java classes are, the easier it is for #AI assistants to generate correct code. ❌ don't use strings for IDs, ✅ create class ID ❌ don't use int for weight, ✅ create class Weight ❌ don't keep dates as longs but ✅ use Instant or LocalDate.

📣 Upcoming #Java User Group München talk "Die Zeit der manuellen Softwareerstellung geht zur Neige – oder generative KI produktiv einsetzen" 🕖 on Monday 14.07 at 19:00h, 🏠 IT-Rathaus der Stadt München, Agnes-Pockels-Bogen 33, 80992 München. Our speaker will be Hans Egermeier. 🧵👇

My small win for this week is that my first PR has landed in the @langchain4j.dev project. If you want to rise to the senior level or beyond, contributing to open source is one of the best decisions you can make: 👇

🚨 SHOCKING: Google can now detect #AI written content! If you rely on ChatGPT, Claude, DeepSeek you need to fix this NOW. Here's one trick to make your writing 100% undetectable: 👇

GitHub CEO Thomas Dohmke said yesterday that it's important to retain manual coding skills despite #AI boom. I'd add that mastering object-oriented design (OOD) is MORE critical nowadays, not less. Here's why 🧵 (1/6)

💡 Did you know that @intellijidea has a #productivity guide? And that it can help you become more productive? Here's how 👇 (🧵 1/6)

On the journey to becoming a #senior developer, some engineering practices that feel like "nice to haves" are actually what separate good developers from great ones. They seem boring at first, but they'll save your sanity (and your reputation) 👇

🧠 Developing #Java apps and other software together with #AI has been my biggest mindshift of 2025. I've swung back and forth from "AI will leave us all jobless" to "AI is completely useless" more times than I care to admit. (🧵 1/2)

💡 The most important keyboard shortcut for #productivity in IntelliJ IDEA is Option+Enter on Mac (Alt+Enter on Windows). See yellow or red highlights in your code? Hit it and @intellijidea.com will very likely offer a correct fix! (🧵 1/2)

What nobody tells you at the start or in the early years of your #career is which #skills you need to become a senior developer. Most people think it's writing code. But in reality, these are: ⬇️ (🧵 1/3)

📆 In the second half of 2025, it'll become normal to let an AI agent write #Java code directly in your IDE or at least by altering the files in the filesystem. In the first half of 2026, the level will be raised by having a fleet of AI agents doing that, faster. Humans will remain in the loop.

📣 Basics of event sourcing and its practical implementation on the JVM with Spring, Kotlin and the Axon Framework in the #Java User Group München talk "Dream Team - Event Modeling & Event Sourcing" by Martin Dilger is now available ▶️ youtu.be/FiJlIODqimA

How many open-source projects have you contributed to (not necessarily #Java related ones)?

A big mistake I made early in my career that slowed me down 📉 was not contributing to free and open-source software earlier and more often. I'm sure I would have reached #senior status sooner had I done it.

💡 One of the most underrated #productivity improvements are aliases for #git commands. gl instead of git pull gc instead of git commit glgg instead of git log --graph Define your own or use existing ones like git plugin for oh-my-zsh. You'll type less but work faster 🚀

📣 #Java User Group München talk "Software Projekte sinnvoll planen mit Event Modeling" by @martin.eventmodeling.org is now available on our YouTube channel ▶️ youtu.be/wDE609cCqlk

Event modelling and event sourcing go best together. You need 5 elements and 4 patterns to implement any system. Generate 80% of the code. Never lose info about what has happened. All that and more in an excellent talk by @martin.eventmodeling.org in front of JUG München tonight

📣 Upcoming #Java User Group München talk "Dream Team - Event Modeling & Event Sourcing" 🕖 on Monday 26.05 at 19:00h, 🏠 Hotel Eden-Wolff, Arnulfstraße 4, 80335 München. Our speaker will be Martin Dilger.

📣 #Java developers from #Munich - next meetup of #JUG München (#JUGM) is 🕖 on Monday 17.03 at 19:00h, 🏠 Hotel Eden-Wolff, Arnulfstraße 4, 80335 München. The topic is "Thoughts on (Modern?) Software Development - Beobachtungen von einer 20-jährigen Reise". Our speaker will be Alexander Thurow.

📣 #Java developers from #Munich - next meetup of #JUG München (JUGM) is 🕖 on Monday 17.02 at 19h, 🏠 Hotel Eden-Wolff, Arnulfstr. 4. The topic is "Catching Recursion by the Tail: The State of Tail Recursion Optimization in Modern JVMs". Our speaker will be Vladimir Parfinenko from @jetbrains.com.

📹 Recording of a fenomenal talk about handling dates and times in #Java is here! Which classes should you use, how to deal with time zones and more - Daniel Schwarz in front of #JUG Munich ▶️ youtu.be/IEuD5BKPR5c #jugm #techtalk #java #seniordeveloper

Another excellent meetup of #JUG Munich! Daniel Schwarz showed us, in his fun-packed way, the most important classes for handling date and time in #Java together with use cases and caveats. And man there are some nasty bugs which could bite us if we don't use the right classes and methods.

You can now watch the talk ▶️ youtu.be/AdmMEBvwhm4

#Java developers if you're not using Pkl yet for your config files you're missing out! Find out more in the link below 👇

Enis Spahi showed us 3 ways of developing and evolving an #API between a client and a server using OpenApi and AsyncApi! #JUG Munich crowd found the talk super useful and I'm sure you will too #java #techtalk #seniordeveloper