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Tommy Ludwig @tommyludwig.bsky.social · 28/07/2026

Project Valhalla is coming. "Tentative date for integration is this Friday, July 31st." mail.openjdk.org/archives/lis...

mail.openjdk.org

Re: JEP 401: Value Classes and Objects (Preview) JDK 28 July integration - jdk-dev - openjdk.org

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Yuichi Sakuraba @skrb95.bsky.social · 24/07/2026

8月7日にJavaのドキュメンタリーを見ながらワイワイする会を開きます！！ 30年分のJavaについてあれこれと話ができればと思っていますので、有料ですがぜひご参加ください！ #java 有料なので、もちろん飲みものも食べものもあります！ The Java Story | The Official Documentary 鑑賞会 javastory2026.connpass.com/event/401305/

javastory2026.connpass.com

8/7 The Java Story | The Official Documentary観賞会 (2026/08/07 19:00〜)

The Java Story | The Official Documentary をみんなで見ながらJavaの思い出を語り合う会です。とは言っても、それだとついていけない人もいると多いと思いますので、歴史に詳しい人が適時解説を入れる形で進めたいと思います。いわゆるオーディオコメンタリーを想像してください。今回は食事をしながらのイベントを考えています。参加費用については目安です。 3...

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JEP Tracker @jeptracker.bsky.social · 14/07/2026

🎓 JEP 401 moved to candidate Title: Value Objects (Preview) Type: feature Component: spec See openjdk.org/jeps/401

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JEP Tracker @jeptracker.bsky.social · 12/05/2026

🎯 JEP 534 proposed to target JDK 27 Title: Compact Object Headers by Default Type: feature Component: hotspot / runtime Release: 27 See openjdk.org/jeps/534

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Micrometer @micrometer.io · 11/03/2026

Reminder to sign up for the pre-conference observability workshop with the Micrometer team at Spring I/O

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Micrometer @micrometer.io · 11/03/2026

Two new milestone releases are available: Micrometer 1.17.0-M3 and Micrometer Tracing 1.7.0-M4. Try them out in a testing environment and let us know any feedback. * github.com/micrometer-m... * github.com/micrometer-m...

github.com

Release 1.17.0-M3 · micrometer-metrics/micrometer

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Arnaud Giuliani @arnogiu.bsky.social · 18/02/2026

If we stop writing code, what's the meaning of our software engineers' job? I stepped back through 30 years of software crises to find out. The pattern is always the same: we confuse producing with building, lose meaning, then find it back. And now AI. #SoftwareEngineering #AI #Architecture

blog.kotzilla.io

The Next Software Crisis Won't Be About Writing Code

AI makes code generation nearly free. But without architecture, design, and craft, we're just producing technical debt faster. Here's why fundamentals matter.

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Spring I/O @springio.net · 19/02/2026

Spring I/O 2026 is less than two months away! Join 1200+ developers and 70+ speakers in Barcelona (13–15 April) for the most in-depth Spring & JVM event of the year. This is where the community gathers, will you be there? 👉 2026.springio.net #springio26

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Toshiaki Maki @ik.am · 18/02/2026

github.com/making/nulla... A Maven plugin that configures ErrorProne and NullAway for nullability checking. It replaces the ~40 lines of maven-compiler-plugin boilerplate typically required to set up NullAway.

github.com

GitHub - making/nullability-maven-plugin: A Maven plugin that configures ErrorProne and NullAway for nullability checking

A Maven plugin that configures ErrorProne and NullAway for nullability checking - making/nullability-maven-plugin

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Tadaya Tsuyukubo @ttddyy.net · 29/01/2026

🚀 Datasource Micrometer "v1.3.0" (Boot 3.x) and "v2.1.0" (Boot 4.x) are out on Maven Central! ✨ Initial OpenTelemetry Semantic Conventions support via "datasource-micrometer-opentelemetry" module. 📖 Docs: jdbc-observations.github.io/datasource-m... #SpringBoot #Micrometer #OpenTelemetry #jdbc

jdbc-observations.github.io

Datasource Micrometer Reference Documentation

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Aleksey Shipilëv @shipilev.bsky.social · 21/01/2026

Updated JOL and heapdump-estimates in it specifically to better support JDK 25. We use this tool to quickly glance where are the opportunities in our real services. Streaming heap dump analysis allows doing this on multi-hundred GB heap dumps. Builds: builds.shipilev.net/jol/

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Spring I/O @springio.net · 21/01/2026

🔍 Learn how to instrument your app for metrics, traces & logs, integrate with OpenTelemetry, and troubleshoot faster with real code samples. Join our hands-on "Observability with Micrometer & Spring Boot 3 + 4" pre-conference workshop with @jonatan-ivanov.bsky.social & @tommyludwig.bsky.social g

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Tadaya Tsuyukubo @ttddyy.net · 17/12/2025

🎉 Great news! Datasource Micrometer is now available on start.spring.io. You can now create a new Spring project with Datasource observation enabled out of the box. #Spring #SpringBoot #Micrometer #Observability #JDBC

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JEP Tracker @jeptracker.bsky.social · 18/11/2025

🏗️ JEP 500 integrated to JDK 26 Title: Prepare to Make Final Mean Final Type: feature Component: core Release: 26 See openjdk.org/jeps/500

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JEP Tracker @jeptracker.bsky.social · 18/11/2025

🏗️ JEP 526 integrated to JDK 26 Title: Lazy Constants (Second Preview) Type: feature Component: core / lang Release: 26 See openjdk.org/jeps/526

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Tommy Ludwig @tommyludwig.bsky.social · 15/11/2025

今日のJJUG CCCに行きたかったけど、宮古島にきちゃった

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Tommy Ludwig @tommyludwig.bsky.social · 14/11/2025

The GitHub website really struggles with bad internet connections (like airplane wifi)

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Devoxx Belgium @devoxx.com · 24/10/2025

Get your hands on the latest Project #Valhalla Early-Access Build, featuring Value Classes and Objects 🪓 #JDK26 #Java 👉 jdk.java.net/valhalla/

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Stefan Marr @stefan-marr.de · 15/10/2025

Can We Know Whether a Profiler is Accurate? Spoiler: yes we can! But it took us figuring out a way to work around the fundamental observer effect. stefan-marr.de/2025/10/can-... If you're at SPLASH, don't miss our talk at VMIL today and at OOPSLA on Saturday!

stefan-marr.de

Can We Know Whether a Profiler is Accurate?

Measuring causes profiles to change, so is there a way to work around it and know whether a profile is accurate?

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Brice Dutheil @bricedutheil.bsky.social · 09/09/2025

#java JEP 401 on value classes is submitted : openjdk.org/jeps/401

openjdk.org

JEP 401: Value Classes and Objects (Preview)

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Tommy Ludwig @tommyludwig.bsky.social · 04/09/2025

Twitterもう見てないからJJUGのイベントを把握できておらず残念

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Tommy Ludwig @tommyludwig.bsky.social · 26/06/2025

There is too much work to do and not enough time to do it...

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Tommy Ludwig @tommyludwig.bsky.social · 04/06/2025

If the C2 compiler is intermittently failing to inline code when running a JMH benchmark with the cause "unloaded signature classes", what's the best way to troubleshoot this? I'm not finding a lot of info online.

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Tommy Ludwig @tommyludwig.bsky.social · 04/06/2025

Mildly hot take: the mailing list system used for JVM/JDK/Java development are antiquated and not a great solution for the purposes they seem to try to serve.

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notamateurhour @notamateurhour.bsky.social · 04/06/2025

at my employer, moving from 40% to 60% in-office and embracing hot desks, we’ve lost 80% of IC6 (staff / emeritus) people and about 25% of our IC5 (senior principal) in my org. I gave my notice today to take a full remote job (with a 10% pay cut). They’re down from 6 to 3 SRE and now no manager.

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Tommy Ludwig @tommyludwig.bsky.social · 02/06/2025

What's the state of the art on measuring power consumption of a Java process?

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Tommy Ludwig @tommyludwig.bsky.social · 21/05/2025

I'm so sad I'm not in Barcelona this week for Spring I/O and jealous of all the people who are.

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Tommy Ludwig @tommyludwig.bsky.social · 21/05/2025

@eddumelendez.bsky.social sorry to ping you here, but I noticed you're a member of SDKMAN and right now it looks like jdk.java.net/25/ EA builds are behind on SDKMAN and I'm not sure where to report it. The latest 25 EA build is 23, but SDKMAN has 16 as the latest: sdkman.io/jdks/open

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Jean-Philippe Bempel @jpbempel.bsky.social · 13/05/2025

TIL: since jdk22 you can use the JVM option -XX:LogClassLoadingCauseFor=com.mycompany.MyClass in conjunction with -Xlog:class+load+cause* to find out the stacktrace that triggers the load of the specify class. see github.com/openjdk/jdk/...

github.com

8193513: add support for printing a stack trace on class loading by dougxc · Pull Request #14553 · openjdk/jdk

In the development of libgraal, it has been very useful to see why a given class is loaded (e.g., trying to reduce startup time by avoiding unnecessary eager class loading). One way to do this is t...

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Tommy Ludwig @tommyludwig.bsky.social · 07/05/2025

I haven't worked at an office in several years. Is it no longer considered rude to loudly have online meetings at your desk?

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Tommy Ludwig @tommyludwig.bsky.social · 01/05/2025

Evergreen comic from xkcd about standards: xkcd.com/927/

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Tommy Ludwig @tommyludwig.bsky.social · 25/04/2025

Anyone have any realistic use of Java's Scoped Values they can share? Yes, I know it's still a preview feature, but I can hope there are some eager people out there.

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Sergi Almar @sergialmar.com · 13/02/2025

Last call - CFP for #springio25 closes tonight! Pro-tip: AI-related submissions are booming, submissions on other topics could make you stand out.

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