Sven Woltmann

Java 26 Features (with Examples) The new Java 26 features: Prepare to make final mean final, Ahead-of-Time Caching with all GCs, HTTP/3, G1 with better throughput, and more...

Java 26 has hit Feature Freeze!

Highlights:
✅ `final` is now truly final
✅ Lazy Constants (Preview)
✅ GC-independent Ahead-of-Time caching
✅ HTTP/3 support
✅ G1 throughput +5–15%

Full breakdown here:
👉 www.happycoders.eu/java/java-26...

#Java #Java26

🎤 Heute auf dem JUG Saxony Day: Hexagonale Architektur – robust, testbar, zukunftssicher.

Statt starrer Schichten stehen Schnittstellen im Fokus: Fachlogik im Zentrum, Infrastruktur sauber gekapselt, klare Dependencies. Ergebnis: Systeme, die sich leichter warten, testen, anpassen lassen.

#JSD2025

Java 25 Features (with Examples) Java 25: Scoped Values, Module Import Declarations, Compact Source Files, Instant Main Methods, Flexible Constructor Bodies, Compact Object Headers and more...

🚀 Java 25 has been released today!

New features include:

* Scoped Values
* Compact Source Files & Instance Main Methods
* Flexible Constructor Bodies
* Compact Object Headers

All details here:
www.happycoders.eu/java/java-25...

Updated Java Versions PDF:
www.happycoders.eu/java-versions/

#Java

Withers in Java: “Derived Record Creation Expressions” Learn how Withers and Derived Record Creation Expressions Simplify Java Records, Avoid Boilerplate, and Make Working with Immutable Data Structures Easier.

New Java syntax ahead: Derived Record Creation Expressions (Withers).

Learn how this upcoming preview feature (JEP 468) introduces a concise way to create new records by only specifying changed fields – no more boilerplate wither methods.

Full guide:
👉 www.happycoders.eu/java/withers...

Java 25 Features (with Examples) Java 25: Scoped Values, Module Import Declarations, Compact Source Files, Instant Main Methods, Flexible Constructor Bodies, Compact Object Headers and more...

Java 25 enters Rampdown Phase One – and is packed with features:

✅ Scoped Values
✅ ​Compact Source Files + Instance Main Methods
✅ Flexible Constructor Bodies
✅ Stable Values (Preview)
✅ Structured Concurrency revamp

Full overview:
👉 www.happycoders.eu/java/java-25...

#Java #Java25

🎉 30 Jahre Java – und ich durfte dabei sein!

In der aktuellen Ausgabe des Javamagazins (6/2025) blicke ich gemeinsam mit anderen ExpertInnen auf Höhen und Tiefen, Meilensteine, Lieblingsfeatures aus drei Jahrzehnten Java zurück.

#Javamagazin #Java #Java30 #JavaCommunity

Double-Checked Locking in Java Discover the Double-Checked Locking pattern in Java: Optimize thread-safe, lazy object initialization without performance losses.

Struggling with thread-safe lazy initialization and can’t wait for #StableValues? Two new articles cover Double-Checked Locking and the Initialization-on-Demand Holder idioms in Java:

www.happycoders.eu/java/double-...

www.happycoders.eu/java/initial...

#Java #StableValues #DoubleCheckedLocking

Stable Values in Java - Finally Initialize Values Safely! What are Stable Values and how do you use them? What are Stable Lists, Stable Maps, and Stable Functions? How do Stable Values work internally?

Just published:

"Stable Values in Java 25: Finally Initialize Values Safely!"

Learn how this new preview feature solves common multi-threading initialization problems. No need to wait for Java 25 - get the details now!

www.happycoders.eu/java/stable-...

#Java #Java25 #StableValues

Thanks to everyone that joined the @javaland.bsky.social Jogging for an 8Km run this morning

#JavaLand #jatumba #runWithJakartaEE

Attendees of @jchateauunconf.bsky.social #4

Whatever happens is the only thing that could have! Proud of the 2025 agenda, thank you all! And special kudos to @ixchelruiz.bsky.social for taking care of the marketplace!

Wow! Thrilled to see that my talk about #StreamGatherers at #Javaland 2025 is completely full! If you missed it, you can read all about Stream Gatherers here: www.happycoders.eu/java/stream-...

Sehr interessanter und kurzweiliger Vortrag von Sven Woltmann zur neuen Stream Gatherer API in Java 23. Das war der perfekte Einstieg in unser neues JUG Jahr 😁 #java #jug #happycoders

Doppelpack: Hexagonal Architecture und Mutation Testing, Do., 6. März 2025, 18:30 | Meetup Am 6. März haben wir einen Doppelpack an Vorträgen zusammen mit unseren Partner, der Eurospace AG. **Die Vorträge** 1. Hexagonale Architektur: Robuste Software dank Schni

Am 6. März 2025 um 18:30 sind wir bei der Europace AG mit einem Talk-Doppelpack „Hexagonal Architecture und Mutation Testing“. Zwei Vorträge – einer von Sven Woltmann und einer von Dehla Sokenou. Wir freuen uns auf Euch! www.meetup.com/de-DE/jug-bb...

Java User Group Hamburg | Meetup Die Java User Group in Hamburg richtet sich an alle Enthusiasten, Neulinge und Interessierte rund um das Thema Java und Softwareentwicklung in und um Hamburg. Auf Treffen werden Java- und technologiev...

Unsere erste Veranstaltung für 2025 ist online. Wir beginnen das Jahr mit Stream Gatherers und wie man sie auch selber schreiben kann. Sven Woltmann wird dafür am 15.01.2025 nach Hamburg zur adesso GmbH kommen. :-)
=> www.meetup.com/de-DE/jug-ha...

Sven Woltmann @svenwoltmann.bsky.social ist auf der #JavaLand 2025 mit seinem Vortrag "Stream Gatherers: Schreibt eure eigenen, leistungsstarken Stream-Operationen!" dabei. Ihr auch? scomp.ly/EgVA1lQ

🚀Java 24 has been released today!

New features include:

* Stream Gatherers
* Virtual Thread Sync without Pinning
* Compact Object Headers

Get all details here:
www.happycoders.eu/java/java-24...

Get my updated Java Versions PDF Cheat Sheet here:
www.happycoders.eu/java-versions/

#Java #Java24