Building the Latest OpenJDK from Source with Docker 🔗 jfumero.dev/posts/2026/0...

🎯 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

Spent better part of my time last few months on this most satisfying piece of work. So many low-level things to obsess about. It was the first time in my life I looked at results, auditing why performance improved on 20+ benchmarks, but not on THIS ONE. github.com/openjdk/jdk/...

The initial source code for Project Brisbane has dropped! Project Brisbane is a JCE provider that uses the Foreign Function & Memory API to encapsulate a FIPS 140 validated OpenSSL library. See github.com/openjdk/bris... for more details and subscribe to [email protected]. #openjdk #crypto

#Kotlin 2.4.0-Beta2 introduces experimental support for "collection literals" - kotlinlang.org/docs/whatsne...

Steven Madow captured this awesome close-up shot of Artemis ll engine, using a Panasonic GH5 and a Lumix G Leica 50-200mm f/2.8-4 lens. This photo was captured at 1/8000s, f/16, and ISO 100. Beautiful (and not BS AI) petapixel.com/2026/04/03/h...

✏️ JEP 8377806 was drafted Title: HTTP over Unix Domain Sockets Type: feature Component: core / net See openjdk.org/jeps/8377806

"makes UseCompactObjectHeaders default" 👏 github.com/openjdk/jdk/...

Well, #Java 26 is boring, except for the #JVM

Check out a sample server using wasi-http built with our early #WebAssembly Component Model support in @Kotlin! 🤩 github.com/Kotlin/sampl... Still early, but very satisfying to see it working ✨ Give it a spin and share what you build 🚀 #Wasm #Kotlin #ComponentModel 1/2👇

New article! Did you know #Kotlin has mandatory varargs? ivan.canet.dev/blog/2026/03...

Nice terminal UI to explore JFR profiles using #TamboUI By Jaroslav Bachorik jbachorik.github.io/posts/jfr-sh... #jfr #java #profiling

inference4j: Java Inference API for Onnx models. Run AI models in Java. Three lines of code, zero setup. #ai #inference #java #models #onnx github.com/inference4j/...

Java interop: Full (runtime class loading) 🤯 #GraalVM #JVM

Today, @maxandersen.xam.dk and I are happy to announce TamboUI, a terminal UI framework for the Java ecosystem! melix.github.io/blog/2026/02...

Out with the old, in with the new... Bruno Borges created this site on modern Java usage: https://javaevolved.gith...

Protobuf4j (protoc compiled to Wasm → JVM bytecode) now supports #Kotlin code generation - github.com/roastedroot/...

The Vite for Kotlin test suite fails with Kotlin 2.3.0 because... Kotlin Wasm has been optimized enough, that the generated Wasm file is so small, that Vite decides to inline it entirely, so there is no visible Wasm in the output

#JDK26 fixes one of the last remaining virtual thread pinning issues, virtual threads now unmount from the carrier instead of pinning while waiting on class initialization by another thread. Better performance, no deadlocks - jdk.java.net/26/release-n... #JVM

Project exposing a Delayed Queue, for #Java, #Kotlin and #Scala … a database-powered message queue that can also delay messages, with support for your favourite RDBMS. github.com/funfix/dat...

Using the #JDK HttpClient, or … not. Well it depends on each one’s use cases. blog.arkey.fr/2026/02/08/t...

Syntax highlighting in Java, without the pain #Chicory #java

✏️ JEP 8361105 was drafted Title: Code reflection (Incubator) Type: feature Component: core See openjdk.org/jeps/8361105

Nice... seems like most of the issues with the OpenAPI #Ktor compiler plugin got fixed in this release. It generates a good enough OpenAPI spec out of the box without needing the new describe DSL #kotlin #ktor #jvm

This is awesome, a single Actually Portable Executable (APE) compiled with #GraalVM + Cosmopolitan libc, runs on any OS and architecture. Cross-compilation was never possible for native-image... until now - github.com/oracle/graal...

It is starting to look like MCP is the new SOAP.

Calling native AI code from Java used to mean JNI pain or shelling out to Python. With the #FFM API, that changes. I built a local speech-to-text service using #Quarkus and whisper.cpp. Everything runs in-process. Everything is explicit. Feels like an important shift for #Java. buff.ly/McUa4m1

JetBrains Air, a new agentic dev IDE based on the Fleet tech - air.dev 👀

After working on ZGC for a decade, I’m happy to announce that I’m publishing a book about ZGC in JDK 25. It ships 22 May (www.taylorfrancis.com/books/mono/1...) and is being published by Taylor & Francis. You should get a copy if you want to learn more about ZGC. It’s available for pre-order now.

Type classes prototype for #java 🤯 - mail.openjdk.org/pipermail/va...

Actually, OpenJDK 25 is 18% faster than OpenJDK 17 and 21 and a whopping 84% faster than OpenJDK 11. Upgrade now!

I hope I'm not the only one who sometimes wonders: "What is my Java application doing right now?" When you don't see any output. This is where my tiny tool called JStall comes in, as you can read in my blog post at mostlynerdless.de/blog/2025/12...

Kotlin compiler plugins are amazing! ✅ Expressive syntax ✅ Compile-time checked ✅ Fast at runtime

Spring Boot 4 finally has a dedicated OpenTelemetry starter. No more pulling in actuator just for observability. Metrics, traces, and logs via OTLP out of the box. youtu.be/6_Y41z7OIv8

exoquery.com/blog/introdu... #kotlin #exoquery

Kotlin 2.3.0 is out! Check out the highlights of this release on the Kotlin blog. 👉 https://kotl.in/trf88y

Deep Dive in Java vs C++ Performance - johnnysswlab.com/deep-dive-in... #jvm

github.com/roastedroot/... - a pure #Java Protobuf library. It works by compiling protoc → WASM → JVM bytecode via Chicory, a fantastic WASM runtime for the #JVM.

👇ICYMI: In my new blog post I'm diving into the fundamentals of Durable Execution, which makes multi-step workflows, defined in code, persistent and resumable. Featuring #SQLite as an execution log as well as some of the goodies of modern #Java, such as virtual threads and scoped variables.

You know that Result::unwrap() from #Rust that just crashed Cloudflare? It wouldn't have happened on the JVM / #Java because its exceptions typically get caught. Just saying 🤷‍♂️

Looks like the @kotlinlang.org Amper build tool doc (dev version) is now available: jetbrains.github.io/amper/dev/ #kotlin #amper #jvm

Integrated ”JEP 516: Ahead-of-Time Object Caching with Any GC”! openjdk.org/jeps/516

KGP 2.2.20 has builtin support for generating and uploading GPG keys 🎉 I still remember when I had to do this 6 years ago. That was not fun. Very excited to see more tools for library authors! kotlinlang.org/docs/whatsne...

@vergauwensimon.bsky.social @kotlinlang.org I think the Ktor custom plugin doc need some refactorings - ktor.io/docs/server-.... We can now supply the config from file easily using the new config deserialization support and can make the config a lot simpler.

Compose UI in JetBrains IDE plugins next year confirmed #kotlin

Finding Order in the Mayhem: A Novel Concurrency Testing Tool that Improved the Kotlin Compiler https://lobste.rs/s/xkziyp ##testing ##kotlin

inside.java/2025/10/27/t... #jvm #java