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Java 27 - Better Language, Better APIs, Better Runtime

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#java‑27

Java 25 is the latest release with wide-ranging long-term support. It's a doozy and Java 26 and 27 followed hot on its heels.

Java 27 - Better Language, Better APIs, Better Runtime

Want to play around with the code yourself? Check out the repository Java X Demo, a project showcasing all important Java 9-16 features - it contains many of the snippets shown in this talk. It has a permissive license, so you can reuse the code for your projects.

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▼

Want to play around with the code yourself? Check out the repository Java X Demo, a project showcasing all important Java 9-16 features - it contains many of the snippets shown in this talk. It has a permissive license, so you can reuse the code for your projects.

Share this post with your community:

I'm active on various platforms. Watch this space or follow me there to get notified when I publish new content:

Java 25 is the latest release with wide-ranging long-term support. It's a doozy and Java 26 and 27 followed hot on its heels:

  • from module imports to improved pattern matching
  • from structured concurrency to HTTP/3
  • from a simpler main to launching multi-source-file programs
  • from better performance to quantum-resistant encryption

There are plenty of features in the language, API, and runtime to discuss - whether new, improved, or finalized. So let's go over them!

▚Slides

Here's the current version of the slides.

I also embedded them below. If they're focussed, you can navigate with arrow keys or swipes (they're two-dimensional, with chapters on the horizontal axis and chapter content layed out vertically). Use Page Up/Down for linearized order and ? for more shortcuts.

▚Video

Here's a good recording of the talk. I hope you'll like it.

Always embed videos

(and give me a cookie to remember - privacy policy)

Watch on YouTube

▚Past Presentations

I gave this talk a few times before. See below for links to slides (as they were at that very event), videos, and other information.

▚2026

Tue, Mar 17th, 10:30 America/Los_AngelesJava 26: Better Language, Better APIs, Better Runtime
program entryslides
at JavaOne
Redwood Shores, Room 203
Thu, Jan 22nd, 19:00 Europe/BerlinJava 25 - bessere Sprache, bessere APIs, bessere Laufzeit
announcementslides
at JUG Ostfalen
Cloudogu GmbH, Brabandtstraße 9-10, Braunschweig
Wed, Jan 21st, 18:30 Europe/BerlinJava 25 - bessere Sprache, bessere APIs, bessere Laufzeit
programslides
at JUG Paderborn
adesso SE, Lise-Meitner-Straße 1c

▚2025

Wed, Dec 10th, 10:00 Europe/BerlinJava 25 - bessere Sprache, bessere APIs, bessere Laufzeit
program entryslides
at IT-Tage
Kristall, Kap Europa, Frankfurt
Thu, Nov 6th, 10:35 Europe/AmsterdamJava 21 to 25 - Better Language, Better APIs, Better Runtime
programslidesvideo
at J-Fall
Pathé Ede, Room 9
Thu, Oct 16th, 16:00 Europe/BerlinJava 25 💣💥
announcementslides
at JUG Karlsruhe
Disy, Zimmerstraße 3, Karlsruhe
Wed, Oct 8th, 10:10 Europe/BrusselsJava 25 - "The Next LTS Version" [Keynote]
program entryvideo
at Devoxx Belgium
Kinepolis, Antwerpen, Room 8
Mon, Oct 6th, 09:30 Europe/BrusselsJava 21 to 25 - Better Language, Better APIs, Better Runtime
program entryslidesvideo
at Devoxx Belgium
Kinepolis, Antwerpen, Room 8
Wed, Sep 10th, 18:00 Europe/BerlinJava 25 - Better Language, Better APIs, Better Runtime
slidesvideo
at OpenValue Düsseldorf
OpenValue Düsseldorf, Am Wehrhahn 41
Tue, Jul 1st, 09:30 Europe/WarsawJava 25 - Better Language, Better APIs, Better Runtime
programslidesvideo
at Code Europe, Cracow
ICE Kraków, Cupertino
Tue, Jun 3rd, 10:45 Europe/BerlinJava 25 - bessere Sprache, bessere APIs, bessere Runtime
program entryslides
at Karlsruher Entwicklertag
IHK Karlsruhe, Raum Baden
Tue, Mar 18th, 16:45 America/Los_AngelesJava 24 - Better Language, Better APIs, Better Runtime
program entryslides
at JavaOne
Redwood Shores, Auditorium
Wed, Feb 5th, 09:00 Europe/StockholmJava 24 - Better Language, Better APIs, Better Runtime
program entryslidesvideo
at Jfokus
Stockholm Waterfront, Room A1
Wed, Jan 15th, 18:30 Europe/BerlinJava 23 - Better Language, Better APIs, Better Runtime
announcementslides
at JUG Bonn
Friedrich-Ebert-Allee 37-39

▚2024

Thu, Dec 12th, 13:00 Europe/BerlinJava 21 bis 23: New Features
program entryslides
at IT-Tage
Okzident, Kap Europa, Frankfurt
Thu, Nov 7th, 11:40 Europe/AmsterdamJava 23 - Better Language, Better APIs, Better Runtime
programslidesvideo
at J-Fall
Pathé Ede, Room 9
Mon, Oct 7th, 09:30 Europe/BrusselsJava 23 - Better Language, Better APIs, Better Runtime
program entryslidesvideo
at Devoxx Belgium
Kinepolis, Antwerpen, Room 6
Thu, Sep 5th, 10:20 Europe/OsloJava 23 - Better Language, Better APIs, Better Runtime
program entryslidesvideo
at JavaZone
Oslo Spektrum, Room 6
Tue, May 14th, 09:00 Europe/BerlinJava 22 - Better Language, Better APIs, Better Runtime
programslidesvideo
at JCON Europe
Cinedom, Cologne, Cinema BlackBox
Mon, Feb 5th, 09:00 Europe/StockholmDeep-dive: Java 21 - Better Language, Better Scalability, Better APIs, Better Tools
program entryslides
at Jfokus
Stockholm Waterfront, Room C1
Mon, Jan 15th, 19:00 Europe/BerlinJava 21 💣💥
announcementslides
at JUG München
München, Eden Hotel Wolff, Arnulfstraße 4

▚2023

Mon, Oct 2nd, 09:30 Europe/BrusselsJava 21 💣💥
program entryslidesvideo
at Devoxx Belgium
Kinepolis, Antwerpen, Room 8
Tue, Sep 19th, 19:00 Europe/BerlinJava 21 💣💥
announcementslides
at JUG Karlsruhe
Disy, Zimmerstraße 3, Karlsruhe
Tue, Aug 29th, 18:00 Europe/ZurichModern Java - Language, Runtime, LTS
announcementslides
at JUG Switzerland - Bern
vatter Business Center, Raum Frutiger

▚2022

Thu, Oct 27th, 17:15 Europe/WarsawModern Java - Language, Runtime, LTS
programslides
at ByteMyCode
Manggha, Krakow
Tue, Oct 11th, 11:30 Europe/StockholmModern Java - Language, Runtime, LTS
slides
at Kvadrat
Online

▚2021

Wed, Dec 8th, 12:00 Europe/BerlinJava 17 Is Here!
program entryslides
at IT-Tage
Online
Thu, Aug 26th, 18:00 Europe/BerlinJava 17 Is Coming!
announcementslidesvideo
at JUG Hessen
YouTube

▚2020

Sat, Dec 5th, 15:15 UTCJava 16 Is Coming!
program entryslidesvideo
at jLove
Room Joy

▚2018

Fri, Oct 19th, 12:00 Europe/MoscowJava 11 Is Here!
program entryslides
at Jokerconf
Saint Petersburg, Expoforum, Track 1
Tue, Sep 25th, 10:45 Europe/StockholmJava 11 Is Here!
programslides
at jDays
Gothenburg, Clarion Hotel Post, Brevsalen 1

▚2017

Wed, Dec 13th, 14:20 Europe/WarsawJava 9 Is Here!
program entryslidesvideo
at Code Europe, Wroclaw
Wroclaw, Hala Stulecia, Room Redmond
Mon, Dec 4th, 19:00 Europe/BerlinJava 9 Is Here!
announcementslides
at Gesellschaft für Informatik, Dortmund
Mercure Hotel Dortmund, Olpe 2
Tue, Sep 26th, 18:30 Europe/BerlinJava 9 Is Here!
announcementslides
at Objektforum Frankfurt
Frankfurt, Saalbau Gutleut, Rottweiler Straße 32
Tue, Sep 12th, 13:00 Europe/BerlinJava 9 Is Here!
program entryslides
at Java Forum Nord
Hannover, Hotel Dormero, Saal 1
Tue, Jul 11th, 19:00 Europe/BerlinJava 9 Is Coming!
announcementslides
at JUG Dortmund
Dortmund, adesso AG, Stockholmer Allee 20
Wed, Jun 21st, 18:30 Europe/BerlinJava 9 Is Coming!
announcementslides
at JUG Bremen
Bremen, team neusta, Konsul-Smidt-Straße 24
Thu, May 18th, 19:00 Europe/BerlinJava 9 Is Coming!
announcementslidesvideo
at JUG Ostfalen
Braunschweig, CKC Group, Am Alten Bahnhof 13
Mon, Mar 6th, 19:30 Europe/BerlinJava 9 Is Coming!
announcementslides
at JUG Freiburg
Freiburg, Munzinger Straße 9, Haufe-Lexware
Thu, Feb 23rd, 13:30 Europe/ZurichJava 9 Is Coming!
announcementslidesvideo
at Voxxed Days Zürich
Zürich, Arena Cinema Sihlcity, Room 2