Just got my first @springio.net submission about COBOL. It ends with "COBOL career is a good career choice". Here’s your career advice for 2025.

Spring Boot 4.0.0-RC1 is here! Final GA is just weeks away (20th Nov), perfect time to try the latest bits. spring.io/blog/2025/10...

Nice demo from @fniephaus.com from the @graalvm.org team of a Spring Boot application summarizing various files with MarkItDown and Hugging Face Transformers popular Python libraries with GraalPy. github.com/fniephaus/gr...

Grab them while they last!

Spring Boot 4 with Brian Clozel and @snicoll.be #DevoxxBE

Spring & friends at #DevoxxBE

Full house in Rod Johnson session on building agents with Embabel. Repo: github.com/embabel/emba... #DevoxxBE

Spring Shell running on the browser thanks to WebAssembly, cool demos by @fniephaus.com Repo: github.com/graalvm/graa... #DevoxxBE

📣 The Spring I/O 2026 CFP is now OPEN! 📅 Deadline: 9 January 2026 📍Palau de Congressos de Catalunya, Barcelona 👉 Submit your proposal now and join us on stage: 2026.springio.net

30 years of Java. #1 language in overall enterprise organizational use #DevoxxBE

Hello Antwerp 👋 Hi #Devoxx

"Implementing Domain Driven Design with Spring" by @maciejwalkowiak.bsky.social just became @springio.net's most-viewed talk, overtaking "Clean Architecture with Spring" by Tom Hombergs! And the most-liked? "Spring Security Architecture Principles" by @garnier.wf.

Spring Boot 4 is moving to Jackson 3 (already in M3). 👉 Check out the Jackson 3 Migration Guide: github.com/FasterXML/ja... 👉 Also useful, the OpenRewrite recipe: docs.openrewrite.org/recipes/java... More insights coming soon in the official Spring blog post next week.

Tried the new Sonnet 4.5 with Junie, it consumes considerably more quota than GPT5 and the quality gains aren’t clear enough, not worth the change as of now.

The @springio.net 2026 website is coming along nicely and CFP will open soon. What topics would you love to see at #springio26? 👇

AI is reshaping the entry-level job market. Some junior roles might be disappearing but on the other hand, companies are desperate to add AI into their systems and workflows. And I believe that is a shortcut for new grads.

I’ve been setting up GitHub self-hosted runners lately to execute jobs from GH Actions. My current client has many security and compliance requirements, this allows having full control over the environment, using any hardware, lower costs and even accessing resources behind a VPN.

You can learn 100 JavaScript frameworks… or you can learn Java and Spring once, and it’ll pay you back for years. 💚

Java 25 / JDK 25: General Availability: mail.openjdk.org/pipermail/jd... Features: openjdk.org/projects/jdk... Downloads: jdk.java.net/25/ #Java25 #JDK25 #OpenJDK #Java

This week's instalment of the Road to GA series, "API Versioning in Spring", is now live spring.io/blog/2025/09... #SpringFramework #REST #Versioning

Still on Java 17 and planning to upgrade? ☕️ Skip 21 and go straight to 25. Java 25 provides memory efficiency gains and garbage collection improvements with zero code changes. Align it with your Spring Framework 7 / Spring Boot 4 upgrade. Strong recommendation by Juergen Hoeller.

Big week 👇 ☕️ Java 25 (Tue 16) 🍃 Spring Boot 4.0.0-M3 (Thu 18, last milestone!) The next gen of Spring Boot is here 🚀 When do you plan to start testing it? - M3 (this week) - RC1 (23rd October) - GA (20th November)

"Hello, AI" is the new "Hello, World"

Who else remembers going to the store to buy Spring Framework 1.0 on floppy disks with a 500-page manual? 😅 Ok, not really for Spring…But Spring Framework 7.0.0-M9 (last milestone) is out 🎉 no store trip needed, just update your dependencies and give it a spin.

The Spring Debugger from @intellijidea.com autodetects your datasources and registers them into the Database tool window. This is particularly helpful when testing with Testcontainers. It gives you instant database inspection, no setup. Super handy. 🧐

The auditorium for the next edition of Spring I/O looks dope!! Can't wait!

Keeping code quality is easy when starting a new project but as the codebase grows, keeping the same quality becomes a challenge. Spring has been around for 20+ years and its code quality is still excellent. 👏 Pro tip: read Spring classes, not just use them. There’s a lot to learn!

I’m still surprised by how much XML shows up in the Spring Framework docs in 2025. For newcomers, it might look like XML is the recommended approach, but annotation-based and Java-based configuration have been the norm for years. Heard it many times in my trainings.

Continuing with the Spring optimization journey, Spring Data 4.0 goes full speed ahead with AOT repositories 🚀. Now your repository query methods are converted to actual source code at build time and compiled together with your application.

Kubernetes Will Solve YAML Headaches with KYAML thenewstack.io/kubernetes-i...

Over 80% of YC S25 startups are AI companies 🤯 I’m glad frameworks like Spring AI exist, making it possible to build AI applications without leaving the JVM. That lowers the barrier for thousands of Java/Spring developers to join this wave.

My Spring Boot apps expose plenty of metrics through Micrometer + Prometheus, but I'm really bad at creating Grafana dashboards.📈 I’ve been experimenting with the MCP server for Grafana and now instead of hand-crafting dashboards, I just ask: "Generate an HTTP dashboard for me":

Got my ticket! Looking forward to catching up with old friends and making new ones in a month.

If you’re starting your Spring AI journey, don’t start from scratch! This awesome repo is packed with examples, projects, and resources to get you started quickly.

🚀 Your Spring app could start up way faster. With AOT Cache (introduced in Java 24) + Spring AOT, startup times drop like magic. Curious how much you can gain? 👇

The next few months are going to be very interesting for Java / Spring devs. Java 25 is just 19 days away and can't wait to upgrade. I know some of you might still be on Java 8, but remember, as @starbuxman.joshlong.com says, Java 25 will be +3x better than Java 8!

Just received a message that made my day. I've been teaching Spring for the last +16 years and welcoming newcomers to the Spring ecosystem. This kind of feedback means a lot 💚.

If you couldn't make it to @springio.net 2025, here's what you missed! Save the dates for Spring I/O 2026 🍃: 13-15 April, Barcelona.

It usually takes me a week to decompress after @springio.net, maybe more as I get older 😅. Spring I/O has exceeded my expectations one more year. Every session, every hallway chat, every spontaneous moment reminded me why this community is so special.

🌱 That’s a wrap on Spring I/O 2025! Thank you to everyone who made this edition so special. Your energy, passion, and support make Spring I/O what it is. 💚 🗓️ Mark your calendars for next year, Spring I/O 2026 will take place on April 13–15 in Barcelona!

The classical Spring I/O Bike & Wine! 🚴🍷 Yesterday we took a break from the city and headed to the peaceful vineyards of Penedès area with our Spring I/O speakers. A scenic bike ride through the green Penedès wine region, surrounded by nature and vines.

Mandatory Keynote Selfie! #springio25

Setting everything up, it's all coming together! #springio25

Unboxing Spring AI 1.0 GA @spring-ai.bsky.social

The calm before the storm. Unloading... #springio25

Finally, Spring AI 1.0 GA is here! Just in time for @springio.net! Congrats to everyone who made this release happen, that's a huge milestone! If you are already using Spring AI, would love to hear about your use cases (chat at Spring I/O?).

It's that week of the year... Spring I/O 2025 is here! 🍃 After months of intense work, late nights and a thousand moving pieces… I usually arrive at the conference week running low on energy. But the moment Spring I/O starts, everything changes...

The venue for @springio.net 2026 is now secured! After visiting several venues and cities, we have a new home for next year's edition.

🧩 The Future of Write Once, Run Anywhere: From Java to WebAssembly by Patrick Ziegler & @fniephaus.com @ Wasm I/O 2025 ▶️ Video: youtu.be/Z2SWSIThHXY 🔗 Slides: 2025.wasm.io/slides/the-f... #wasmio25 @graalvm.org

Prompt Engineering in Java: #SpringAI turns Google's Prompt Engineering Guide into code. Implements zero-shot, few-shot, chain-of-thought & more in our new blog post: spring.io/blog/2025/04... #Java #PromptEngineering #SpringAI