Even if you’ve read the JEPs—have you used #RecordPatterns to refactor old-school branching logic? @manojnp shows how to turn bloated instanceof trees into readable, idiomatic #Java code with just records.

👉 https://javapro.io/2025/01/15/record-patterns-building-on-java-records/

#Refactoring #PatternMatching #CleanCode

Who do I see on the #JavaOne 2026 website? I see @maritvandijk @lizeraes @cayhorstmann & Jim Grisanzio. Registration is open! Sign up now to engage with #Java experts from around the world (March 17-19)!
➡️ https://javaone.com

New 📚 Release! Java Programming: Beginner to Intermediate by Gerry Byrne & David Wilson

Java Programming: Beginner to Intermediate is the ultimate resource for anyone who wants to learn Java fast and build real programming skills. Whether you’re a complete beginner, a career changer, or someone refreshing their knowledge, this book is designed to help you succeed.

Find it on Leanpub!

Link: https://leanpub.com/javaprogrammingbeginnertointermediate

#books #java #programming #javaprogramming #softwaredevelopment

On my #Java live coding stream today, when implementing the JDBC implementation of my Event Store, I talked about doing #TDD for Discovery and Design (learning about what the desired behavior should be), vs. implementing a known behavioral specification.

https://jitterted.stream

Instead of buying stuff during Black Friday that I don’t really need, I’m sponsoring open source #Java projects that I rely on. Today's donation is to Tatu Saloranta, the authot of the #Jackson JSON library (among other things!).

https://github.com/sponsors/cowtowncoder?sp=tedyoung

Stand-ups, #Kanban-Boards, Sprints – doch der echte Nutzen bleibt aus? Marin Niehues zeigt, warum Frameworks allein nichts verändern & wie hybride Ansätze mehr Wert schaffen können.

Was wirklich wirkt, abseits der Methode: https://javapro.io/de/agile-scrum-kanban-und-die-maerchen-die-wir-uns-ueber-wertschoepfung-erzaehlen/

#Java #Leadership #Agile #Scrum

🚀 #ApproveJ v1.0 ("ONE-POINT-ZERO") was just released! 🎉🥳🍾

🧹 all deprecated methods have been removed
🪲 approving by file is now also possible in parameterized tests
📖 minor updates in the manual

https://github.com/mkutz/ApproveJ/releases/tag/v1.0

#approvaltesting #snapshottesting #java #kotlin #unittesting #release

Alt...

Release banner for v1.0

Instead of buying stuff during Black Friday that I don’t really need, I’m sponsoring open source #Java projects that I rely on. Today's donation is to the Apache Software Foundation, my longtime companion throughout my career. #Maven is still my go-to build tool!

Yay, one big step closer to the release of #IntelliJIDEA 2025.3! Check out the release candidate: https://blog.jetbrains.com/idea/2025/11/intellij-idea-2025-3-release-candidate/

#Java #JDK25 #Junit6 #SpringBoot4

Instead of spending Black Friday buying stuff I don’t really need, I’m sponsoring open source #Java projects that I rely on. Next up is SDKMAN! (https://sdkman.io). While I don’t use it as often as JUnit or AssertJ, it helps me manage my huge variety of JDKs installed.

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

Hey there! I'm hiring an EM to help lead our JVM Ecosystem team! From build time to run time, this is an opportunity to work with some really awesome engineers on the lowest levels of the #Netflix stack.

My DMs are open!

#java #JVM

https://explore.jobs.netflix.net/careers/job/790312532064?microsite=netflix.com

Instead of buying more stuff that I don’t really need, I’m sponsoring open source #Java projects that I rely on, starting with #JUnit and #AssertJ (via core maintainers Joel and Stefano).

If I was a big company using Java, I’d be embarrassed at not sponsoring these projects.

#Tokyo

An amazing #city

The largest city in the world

...Not anymore

"With an estimated population of nearly 42 million residents, #Indonesia's capital #Jakarta soared from 33rd place to surpass #Japan's Tokyo, according to a new #UnitedNations report"

A mind boggling fact for you:

The population of #Java is about 155 million

The population of #Russia is about 145 million

Java is about 2/3 the size of #GreatBritain!

That's what rich volcanic soil does

https://www.nbcnews.com/world/rcna245798

#cities

Big Kotlin pack https://leanpub.com/b/kotlin_mm by Marcin Moskała is the featured bundle of ebooks 📚 on the Leanpub homepage! https://leanpub.com #Kotlin #Android #Java #ComputerProgramming #Engineering

The following 5 books are included in this bundle...

Kotlin Essentials, Functional Kotlin, Advanced Kotlin, Kotlin Coroutines, and Effective Kotlin

Find it on Leanpub!

My online talk on Tuesday, Nov 25 at 6pm UTC is 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.

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

#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.

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

Standups, #Kanban boards, sprints—yet little impact. Marin Niehues analyzes why #Agile rituals often fail and how combining iterative and linear approaches can unlock real value.

Learn what actually works: https://javapro.io/2025/07/17/agile-scrum-kanban-and-the-lies-we-tell-ourselves-about-creating-value/

#Scrum #Java #ProjectManagement #Leadership

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

🚨 Time Sensitive 🚨

#Java peers...the 2026 #JavaOne call for papers closes soon. Get your proposals in by the Nov 11 deadline ➡️
social.ora.cl/6017A7UwL

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

PRs aren’t designed to improve collaboration. They’re a workaround for missing trust. @javisan81´s #JAVAPRO article challenges how you structure code reviews & your teams.

Required reading for every dev lead: https://javapro.io/2025/10/29/pull-requests-code-reviews/

#SoftwareEngineering #Agile #CodeReview #Java

I realized in talking about #Java in another thread that one of the things about it that I find most frustrating as a "regular user" is that Java applications don't act like other applications on the command line.

With some languages like Python, Perl, Ruby, Lua, most Lisps, and Elixir, you can run a command on the source directly, ala

perl foo.pl

Or compiled languages like C, C++, Go, or Rust, I can run the compiled code:

./a.out

But with Java, I have to essentially do both, since I have to invoke the JVM on the compiled object.