Event Sourcing is the storing of state-changing decisions made within a part of the domain.

(noodling with my intro for my upcoming talk on event sourcing: https://luma.com/dt9fc391)

#EventSourcing #Java

Spring Boot 4.0 is out, upgrade and enjoy Boot modularization, portfolio-wide null-safety, first class support for Java 25, API versioning for web applications and more! https://spring.io/blog/2025/11/20/spring-boot-4-0-0-available-now

#spring #java

Java Clean Code Fundamentals https://leanpub.com/b/javacleancodefundamentals by Martin Hock is the featured bundle of ebooks 📚 on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Java

Find it on Leanpub!

IntelliJ IDEA 2025.3 Beta has been published, it provides first class support for JSpecify nullability annotations that are used in Spring Boot 4.0 which will be released today. https://www.jetbrains.com/idea/nextversion/

#java #spring

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 3.4.12 has been released and is now available from Maven Central.

https://spring.io/blog/2025/11/20/spring-boot-3-4-12-available-now

#java #spring #springboot

#rust I now have code that gives me a list with 24 time zones, one for each full-hour offset from UTC. It's not nice, but my #Java version wasn't nice either (https://codeberg.org/dtanzer/tzsh/src/branch/main/java).

I'll push the rust version when at least a few things work.

The recently released No Longer Evil Thermostat hack for Google’s discontinued Nest Gen 1 and Gen 2 promises better control, with a “sleek, intuitive interface that rivals the original.” #Tech #Google #Computing #OpenSource #Science #Engineering #Blog #TechNews #News #Markets #USA #EU #Europe #Java

A new blog post in the Road to GA blog series has been published. This time we're taking a look at OpenTelemetry with Spring Boot!

https://spring.io/blog/2025/11/18/opentelemetry-with-spring-boot

#spring #springboot #java

On Tuesday, Nov 25 at 18:00 UTC, I'll be doing a 90-min online presentation of my #Java based "Event-Sourcing from Scratch" talk. Details and _free_ registration at https://luma.com/dt9fc391

Join live to ask questions, or watch for the recording later.

Insert "Java developers and ORM mapping" joke here.

#java #orm #hibernate

Alt...

Screenshot of a reddit post: "TIL that based on skeletal evidence, ancestral Neanderthals may have been able to hibernate"

#DevNexus is one of the top community #Java and Cloud conferences, so come and see me and other great speakers present all the Cool and Useful ideas and techniques. Use the code SEEMESPEAK to get an extra $100 off the registration at https://devnexus.com/

Refactoring Needs Empathy (h/t Andrea Goulet), but it also needs Skills.

At #DevNexus in March, I'll be showing my favorite techniques for #Refactoring in #Java using IntelliJ IDEA. Even if you're an experienced coder, I'll bet you'll still learn a few new things to try out...

Alt...

Speaker graphic, with the dev/nexus conference name at the top (subheading: Enterprise, Java, AI and Developer Tools Conference). Next is "I'm speaking at DevNexus 2026: 'Clear Up Messy Code with Refactoring Maneuvers in IntelliJ IDEA'". Below that are the conference dates: March 4-6, 2026, in Atlanta Georgia, USA. Below is a picture of my and name "Ted M. Young".

On Tuesday, Nov 25 at 18:00 UTC, I'll be doing a 90-min online presentation of my #Java based "Event-Sourcing from Scratch" talk. Details and _free_ registration at https://luma.com/dt9fc391

Lots of room to sign up!

Join live to ask questions, or watch for the recording later.

On Tuesday, Nov 25 at 18:00 UTC (10a PST, 1p EST, 7p CET) I'll be doing a 90-min online presentation of my #Java based "Event-Sourcing from Scratch" talk. Details and _free_ registration at https://luma.com/dt9fc391

Join live to ask questions, or watch for the recording later.

On Tuesday, Nov 25 at 18:00 UTC (10a PST, 1p EST, 7p CET) I'll be doing a 90-min online presentation of my #Java based "Event-Sourcing from Scratch" talk. Details and _free_ registration at https://luma.com/dt9fc391

Join live to ask questions, or watch for the recording later.

After a year of work, we are happy to share that Spring Framework 7.0 GA is now available! https://spring.io/blog/2025/11/13/spring-framework-7-0-general-availability/

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

Testing Spring Boot Applications Demystified by Philip Riecks is free with a Leanpub Reader membership! Or you can buy it for $9.00! http://leanpub.com/testing-spring-boot-applications-demystified #Java #Testing #AutomatedSoftwareTesting

High-Performance Java Persistence by Vlad Mihalcea is on sale on Leanpub! Its suggested price is $34.95; get it for $25.46 with this coupon: https://leanpub.com/sh/5CcxKgNd #Software #Java #Databases #Mysql #Oracle #Postgresql #SqlServer #SoftwareEngineering

Don't miss my new blog post in the Road to GA series to learn how the Spring team empowers Spring developers to make their Spring Boot 4 application null-safe, to reduce or remove the risk of NullPointerException and to solve "the billion dollar mistake"! https://spring.io/blog/2025/11/12/null-safe-applications-with-spring-boot-4

#spring #java

🚀 Ready to dive into the future of Spring & AI? Join us for Bootiful Spring AI: An Evening with @starbuxman (Josh Long) & @jamesward (James Ward)! 🧠✨
📅 Don’t miss your chance — Nov 19th: 👉 https://www.javasig.com
#BootifulSpringAI #SpringFramework #AI #Java

ICYMI, JEP 516 is targeting #JDK 26!!!!
More performance with Project Leyden’s Ahead-Of-Time Cache, with any GC 🚀 !!!

https://openjdk.org/jeps/516

#Java #JVM #performance

Another implementation of game-of-life, this time in #Java and I tried to use some #functional constraints:

https://codeberg.org/dtanzer/game-of-life/src/branch/main/java-func-constraint

Didn't clean up the test file, that was not what I wanted to practice this time. Also, forgot to commit after each micro step during the #TDD cycle.

And it's probably my last game-of-life for some time, since this year's global-day-of-code-retreat is over. #gdcr

Spring Boot 4.0.0-RC2 available now!

We've released Spring Boot 4.0.0-RC2, it's available on Maven Central for easy consumption. Please give it a try and report issues back to us, we really appreciate your feedback!

https://spring.io/blog/2025/11/06/spring-boot-4-0-0-RC2-available-now

#java #spring #springboot

Thank you to everyone that attended our talk on writing #AI models in pure #Java 🥳 !!!

The slides Lize Raes and I used at #JFall are available below, but you can always connect with us and ask more questions on what we presented 😇!!!
https://www.slideshare.net/slideshow/writing-gpu-ready-ai-models-in-pure-java-with-babylon-08de/284064587

High-Performance Java Persistence by Vlad Mihalcea is on sale on Leanpub! Its suggested price is $34.95; get it for $25.46 with this coupon: https://leanpub.com/sh/BKl7wpkx #Software #Java #Databases #Mysql #Oracle #Postgresql #SqlServer #SoftwareEngineering

Stratospheric - From Zero to Production with Spring Boot and AWS: Hands-on online course to learn all you need to know to get a Spring Boot application into production with AWS. http://leanpub.com/courses/leanpub/stratospheric by Philip Riecks, Björn Wilmsmann, and Tom Hombergs is the featured online course on the Leanpub homepage! https://leanpub.com #AmazonWebServices #Java #SoftwareArchitecture #SoftwareEngineering #CloudComputing

Leanpub book LAUNCH 🚀 Spring AI for Your Organization: GCP Vertex AI Edition by Muthukumaran Navaneethakrishnan

Watch here: https://youtu.be/9EGUB-dQlv0

#books #leanpublishing #selfpublishing #booklaunch #programming #software #data #GPT #AI #Java

This looks like an incredible tool for testing concurrent #Java code: https://github.com/cmu-pasta/fray

Also has research papers published and some presentations (now on my To Watch list!).

#Testing #Concurrency

Spring AI for Your Organization by Muthukumaran Navaneethakrishnan is free with a Leanpub Reader membership! Or you can buy it for $18.99! http://leanpub.com/springai #Java #Ai #Postgresql #Gpt

And now the
@devoxx interview is online where I talk about Java performance, Project Leyden, GraalVM's native image and Project CRaC. Thanks a lot for having me,
@frankdelporte !

https://www.youtube.com/watch?v=1J_djKerA38

#java #performance #leyden #nativeimage

On today's live coding (yes! I'm back streaming on https://jitterted.stream!), I was surprised to get a ClassCastException while iterating over a List<CustomerEvent>! From what I saw, toList() uses toArray() which may cause type info to be discarded.

More details soon...

#Java

Modern Thymeleaf Bundle https://leanpub.com/b/modern-thymeleaf-bundle by Wim Deblauwe wimdeblauwe@mastodon.social is the featured bundle of ebooks on the Leanpub homepage! https://leanpub.com #Java #Html #WebDevelopment #Software #Javascript

Jetpack Compose internals by Jorge Castillo is on sale on Leanpub! Its suggested price is $49.99; get it for $17.50 with this coupon: https://leanpub.com/sh/lXFW9nD3 #Software #ComputerProgramming #Java #Kotlin #SoftwareArchitecture #SoftwareEngineering

We've published a new installment of our "Road to GA" blog series. This time it's about the huge modularization effort the Spring Boot team has done and which is coming in Spring Boot 4: https://spring.io/blog/2025/10/28/modularizing-spring-boot

#java #spring #springboot

Testing Spring Boot Applications Demystified by Philip Riecks is free with a Leanpub Reader membership! Or you can buy it for $9.00! http://leanpub.com/testing-spring-boot-applications-demystified #Java #Testing #AutomatedSoftwareTesting

Woo hoo, IntelliJ IDEA 2025.2.4 is out! (The release candidate's been working well, so happy to get the actual release...)

https://blog.jetbrains.com/idea/2025/10/intellij-idea-2025-2-4

#Java #IntellijIDEA

And we've released Spring Boot 4.0.0-RC1:

https://spring.io/blog/2025/10/23/spring-boot-4-0-0-RC1-available-now

Please give the RC1 a try, it's available on Maven Central to make that easier. We really appreciate your feedback!

#java #spring #springboot

Yesterday we've also released Spring Boot 3.5.7:

https://spring.io/blog/2025/10/23/spring-boot-3-5-7-available-now

#java #spring #springboot

PSA: Ich habe vor mehreren Jahren die Domain euregjug dot eu gekündigt. Weder sind es meine Inhalte auf der Webseite noch habe ich etwas mit dem aktuellen Registrar zu tun.

#Java #JUG

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 3.4.11 has been released and is now available from Maven Central.

https://spring.io/blog/2025/10/23/spring-boot-3-4-11-available-now

#java #spring #springboot

#DevNexus is one of the top community #Java and Cloud conferences, so come and see me and other great speakers present all the cool and useful things. Use the code SEEMESPEAK to get an extra $100 off the registration at https://devnexus.com/