No good weather today 🌧️ ☔ so why not join me in JUG Lucerne and find out what a handful of developers are doing to ship the next major version of AssertJ? 🧑‍💻 www.jug.ch/html/events/...

#JUnit 6.1.0 is released! 🕑 Built-in extensions for locale, time zone, and system properties 🚮 Configurable TempDir deletion strategy 🏃‍➡️ New org.junit.start module for compact source files ⚙️ Execution mode config for dynamic tests 🏊 New parallel test executor impl. docs.junit.org/6.1.0/releas...

Less than a week to go! 🚀 Join me this Tuesday at PH Zürich to discover how AssertJ 4 is about breaking things (carefully) to make your testing life better. Come for the technical debt, stay for the drinks and networking! 🍻 www.jug.ch/html/events/...

Today, from the venue of Spring I/O, I'm open-sourcing a new library to make data-driven testing in Java a little bit easier: JUnit Converters! A collection of ready-to-use argument converters designed to streamline parameterized testing in JUnit 6 (and 5!) 🚀 🧵 stefano.codes/junit-conver...

JUnit Converters

Collection of argument converters for JUnit parameterized testing

stefano.codes

Moving beyond Strings in Spring Data spring.io/blog/2026/02...

Moving beyond Strings in Spring Data

Level up your Java code and explore what Spring can do for you.

spring.io

Please do not use System.currentTimeMillis() to measure elapsed time: develotters.com/posts/how-no...

How Not to Measure Elapsed Time

How Not to Measure Elapsed Time

develotters.com

📢 AssertJ joined the GitHub Secure Open Source Fund, a program that leveled up security across 67 open source projects. What changed for us: SHA pinning, immutable releases, incident response plan, and a mindset shift toward security awareness 🔒 The impact? More robust JVM assertions 🚀

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

10+ reasons to NOT use JDK’s HttpClient

Java mostly, and general tech

blog.arkey.fr

First-class support for Spring Data JDBC in IntelliJ IDEA. Well done 👏🥳

IntelliJ IDEA, a JetBrains IDE@intellijidea.com · 7mo ago

The Spring Data JDBC is growing and IntelliJ IDEA provides first-class support for it! ✅ Create entities from DB tables ✅ Generate scripts for Liquibase / Flyway ✅ Create repositories from usage + auto-wiring ✅ Column-to-code completion Read more 👉 jb.gg/39id13

A free SQL explain plan visualizer tool by @datadoghq Currently for PostgreSQL, MySQL, MSSQL and MongoDB explain.datadoghq.com

#CSRF Protection without Tokens or Hidden Form Fields https://blog.miguelgrinb... #infosec

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

The IntelliJ IDEA 2025.3 release has landed! This version brings several significant updates, all of which are described and demoed on our What’s New page. Check it out! 👇

What's New in IntelliJ IDEA 2025.3

Explore IntelliJ IDEA's latest features and updates to elevate your professional Java and Kotlin development experience.

jetbrains.com

Great post from @infoq.com on on Spring Boot 4.0 and Spring Framework 7 features: www.infoq.com/news/2025/11...

Spring Framework 7 and Spring Boot 4 Deliver API Versioning, Resilience, and Null-Safe Annotations

Broadcom released Spring Framework 7.0 and Spring Boot 4.0, introducing first-class REST API versioning, JSpecify annotations for standardized null safety across the Spring portfolio, built-in resilie...

infoq.com

⚡ Amper 0.9.0 is here! ⚡ • First preview of extensibility and plugins • Dependency resolution graph caching • Auto-sync in the IDE (using IntelliJ IDEA 2025.3 Beta) Release notes 👉 kotl.in/amper090-github Blog post 👉 https://kotl.in/amper090

Amper Update, November 2025 – Extensibility Preview | The Amper Blog

Amper is an experimental, standalone build tool by JetBrains, for server-side and Kotlin Multiplatform development. Read on for the latest updates!

kotl.in

🎄 Join us live for five days of Advent of Code puzzles and Kotlin livestreams on December 1–5! Solve puzzles in Kotlin with help from team experts and guest creators, climb the leaderboard, learn new tricks, and get a chance to win prizes along the way with fun!! 💜 blog.jetbrains.com/kotlin/2025/...

Advent of Code 2025: A Kotlin Playground | The Kotlin Blog

Join us live for five days of Advent of Code puzzles and five Kotlin livestreams on December 1–5. Solve the puzzles in Kotlin with help from Kotlin team experts and fun community guests, climb the lea

blog.jetbrains.com

#Kotlin 2.2.0: Game-Changing Features That Will Transform Your Development Workflow https://medium.com/@shar...

Master Spring Data AOT in IntelliJ IDEA blog.jetbrains.com/idea/2025/11...

Master Spring Data AOT in IntelliJ IDEA | The IntelliJ IDEA Blog

Spring’s AOT engine has been around since the Spring Native days, but Spring Data never really benefited from it – until now. Repository infrastructure is one of the most dynamic parts of the framewor

blog.jetbrains.com

Exciting News 🎉 Spring Boot 4.0.0 is here: spring.io/blog/2025/11...

Spring Boot 4.0.0 available now

Level up your Java code and explore what Spring can do for you.

spring.io

🤔 Who said that AssertJ 3 is in maintenance mode? 📢 We're planning an exceptional 3.28 release – let us know what you'd like to see in there! 👇 github.com/orgs/assertj...

After a year of work, we are happy to share that Spring Framework 7.0 GA is now available! spring.io/blog/2025/11... Time to celebrate, get a bit of rest and help the team to prepare Spring Boot 4.0 GA release planned November 20th 😊 #spring #java

Spring Framework 7.0 General Availability

Level up your Java code and explore what Spring can do for you.

spring.io

Hack.Commit.Push Switzerland is just one week away! 🇨🇭 This is a great opportunity to get involved in Open Source projects like @assertj.github.io, with direct guidance from the maintainers!

Andres Almiray@andresalmiray.com · 11mo ago

The next edition of Hack.Commit.Push Switzerland🇨🇭will take place in Rotkreuz LU this November 22nd. Care to join us for some Open Source hacking? It’s for a good cause! switzerland2025.hack-commit-pu.sh

#JUnit 6.0.0 is released! ✨ Java 17 and Kotlin 2.2 baseline 🌄 JSpecify nullability annotations 🛫 Integrated JFR support 🚟 Kotlin suspend function support 🛑 Support for cancelling test execution ⏭️ New `--fail-fast` mode for ConsoleLauncher 🧹 Removal of deprecated APIs docs.junit.org/6.0.0/releas...

📢 AssertJ 3.27.6 has been released! This fixes a 🐛 regression related to the module descriptor 🧩 Happy assertions! github.com/assertj/asse...

Release v3.27.6 · assertj/assertj

🐛 Bug Fixes Core Add missing export for org.assertj.core.annotation #3951 ❤️ Contributors Thanks to all the contributors who worked on this release: @duponter

github.com

Architectural #Patterns, The Pattern Language of #SoftwareArchitecture Consider supporting the authors on Leanpub: leanpub.com/metapatterns

Home

Architectural Metapatterns book and wiki. Contribute to denyspoltorak/metapatterns development by creating an account on GitHub.

github.com

📢 Jimfs JUnit Jupiter 0.3.2 has been released! 🛠️ This release upgrades Jimfs and JUnit to their latest versions. 🧑‍💻 Any feedback is welcome! github.com/scordio/jimf...

Release v0.3.2 · scordio/jimfs-junit-jupiter

⚡ Improvements Add JSpecify and NullAway #27 Update JUnit's Javadoc link #28 🔨 Dependency Upgrades Upgrade to Jimfs 1.3.1 Upgrade to JUnit BOM 5.13.3 ❤️ Contributors Thanks to all the contribut...

github.com

OkHttp 5.0 has a stable API. 🗿

Ey, ey, ey, so much going on, I forgot to tell you about my vacation Newscast. 🤦‍♂️ Check it out to learn how to transform cryptographic objects to PEM texts and vice versa with #Java 25 (or to speedrun my Ibiza vacation): www.youtube.com/watch?v=hqvM...

Java 25 Encodes PEM - Inside Java Newscast #93

YouTube video by Java

youtube.com

"Rich Errors in Kotlin” – the KotlinConf’25 talk by Michail Zarečenskij is now live on our YouTube channel! 🎉📺 Discover how Kotlin’s nullability model can be generalized to restricted union types for better error handling. 👉 Watch the full video: kotl.in/richerrors

The new Spring Debugger recently released by JetBrains is IMO a game changer in terms of DevXP, both for the Spring team and for Spring Boot application developers. blog.jetbrains.com/idea/2025/06...

Demystifying Spring Boot With Spring Debugger | The IntelliJ IDEA Blog

Pull back the curtain on the Spring Boot magic and see how the Spring Debugger plugin makes the invisible visible.

blog.jetbrains.com