Lightnews — Scholar-powered news

Nicolai Parlog

@nipafx.dev

As always, #JFall was a blast - thanks for having me and letting me tell people about the latest #Java features. 🙏

Slides: slides.nipafx.dev/java-x/2025-...

November 6, 2025 at 8:49 PM

Nicolai Parlog

@nipafx.dev

The next Inside Java Newscast will be episode #100. 🤩🥂 It'll be about the recent Valhalla news, but after that, to celebrate the jubilee, I'll answer your questions about the show and the team behind it. Put your questions below. 👇🏾

A collage of 99 Inside Java Newscast thumbnails with a "100" superimposed on it

November 1, 2025 at 8:07 AM

Nicolai Parlog

@nipafx.dev

The best #Devoxx session (in my book) is about to start: Ask the Architects. Bring your questions about Java and the OpenJDK architects will answer them. See you in five!

October 9, 2025 at 8:36 AM

Nicolai Parlog

@nipafx.dev

Setup for tomorrow... 🤓 www.youtube.com/live/duIceCX...

September 15, 2025 at 7:53 PM

Nicolai Parlog

@nipafx.dev

Java stream's terminal operations `findFirst` and `findAny` are neat but one use cases isn't covered: "find the only one" - a terminal operation you'd use after a filter that's supposed to let exaxctly one element pass through.

There's now a JDK preview with that operation, named `highlander`. ⚔️

Screenshot of the following code:

Stream.of("AB", "C", "DEF").filter(string -> string.length() == 1).highlander();

This shows no compile error, but is still an April Fool's joke. 😁

April 1, 2025 at 9:41 AM

Nicolai Parlog

@nipafx.dev

"Everybody wants code reviews until they get punched in the face."

- Mike Tyson (pretty much)

Prime Mike Tyson in the ring, staring off camera

March 26, 2025 at 10:24 AM

Nicolai Parlog

@nipafx.dev

Just leaving this here... #JavaOne

Valhalla Roadmap
* JEP 401 - value classes
* JEP nnn - null-restricted types (separate from value classes)
* JEP mmm - null-restricted value types
* JEP 402 - minimize gaps between int and Integer!
* and surely more

March 18, 2025 at 9:18 PM

Nicolai Parlog

@nipafx.dev

Until then, here's a little behind-the-scenes footage from the build-up. 🤩

Time lapse of workers setting up a conference venue

March 17, 2025 at 8:06 PM

Nicolai Parlog

@nipafx.dev

If you're using #Java's source-file launcher, you may eventually want to drop some dependencies into your little project. But how to get them without a build tool?

One answer is JPM - give it a shot, it's cool: github.com/codejive/jav...

JPM search for "jfiglet" and selection of one of three search results

JPM prompt how to process the selected dependency

Terminal command "tree" and its result showing that JPM installed the selected JAR in its .m2 folder and created a symlink in the current project

February 7, 2025 at 4:43 PM

Nicolai Parlog

@nipafx.dev

The #Java YouTube channel just passed 200.000 subscribers. Woot! 🥳 Thank you, everybody, for watching, commenting, sharing, and just in general for being an active member of this awesome community. 🧡💙

www.youtube.com/java

A small Duke standing in front of YouTube's 100k subscriber plaque with a 200k sticker on it.

January 29, 2025 at 3:30 PM

Nicolai Parlog

@nipafx.dev

How should I know what I think without reading what I wrote?

A human-sized laptop playing a video that shows, among other things, somebody typing on a keyboard. Behind the laptop is an old, wooden desk illuminated by a 2x human-sized desk lamp.

January 19, 2025 at 11:47 AM

Nicolai Parlog

@nipafx.dev

I'm coming for you, @odrotbohm.de!

The JUG KArlsruhe Hall of Fame showing the top speakers and the respective number of talks: 1. Oliver Drotbohm: 9; 2. Nicolai Parlog: 7; 3. Michael Plöd: 5

January 9, 2025 at 12:32 PM

Nicolai Parlog

@nipafx.dev

That's all the recommendation I need.

Screenshot of a purchase confirmation of the SINGULARITY bundle (volumes 1-3) by William Hertling

January 9, 2025 at 8:08 AM

Nicolai Parlog

@nipafx.dev

The next time you accidentally call a Java release "an LTS version", remember:

* it happens to the best (in this case the authors of JEP 14)
* it's easy to fix

Friends don't let friends use misnomers.

October 4, 2024 at 2:35 PM

Nicolai Parlog

@nipafx.dev

OpenJDK is on a roll right now! Leyden just submitted its first JEP: "Ahead-of-Time Class Loading & Linking".

openjdk.org/jeps/483 #Java

August 5, 2024 at 11:10 AM

Nicolai Parlog

@nipafx.dev

JVMLS takes place next week - be there or be... on YouTube: youtube.com/java

That's what I'll do and I can't wait to watch the talks with updates on Babylon, HAT, Valhalla, Lilliput, and so many more. #Java

August 1, 2024 at 5:25 PM

Nicolai Parlog

@nipafx.dev

When you're about to start live-coding but don't know the API by heart. 😬

www.youtube.com/watch?v=AjjA...

Post-it notes with hand-written code next to a laptop

March 19, 2024 at 7:34 PM

Nicolai Parlog

@nipafx.dev

Java 22 is coming! Join us on March 19th at 17:00 UTC for a live-stream event to celebrate another great release with technical deep dives, expert guests, a community update, and an exciting announcement.

dev.java/community/ja...

March 8, 2024 at 10:21 AM

Nicolai Parlog

@nipafx.dev

As always, Jfokus was a blast! I'm so happy to have been invited to talk about the amazing features in Java 21 and newer.

Slides from the deep dive with @ammbra1508.bsky.social:
slides.nipafx.dev/java-x/2024-...

Live coding slides: slides.nipafx.dev/java-x-actio...
Code: github.com/nipafx/moder...

February 8, 2024 at 9:13 AM

Nicolai Parlog

@nipafx.dev

New year - time to go on the road again. 😃 In the coming weeks, I'll be at:

* JUG Bielefeld today
* JUG Munich on the 15th (www.meetup.com/de-DE/Java-U...)
* Voxxed CERN on 21st/22nd
* Jfokus (Stockholm) on Feb 5th-7th

I'll see you there!

Java's Duke spinning the globe like a ball

January 10, 2024 at 9:02 AM

Nicolai Parlog

@nipafx.dev

A nice little end-of-year achievement. 😊 Turns out, when you publish videos, people subscribe to your channel - who would've thought?

youtube.com/nipafx

December 15, 2023 at 8:56 AM

Nicolai Parlog

@nipafx.dev

TIL:

mvn versions:display-plugin-updates
www.mojohaus.org/versions/ver...

(From @richardfichtner.bsky.social at IT-Tage)

December 13, 2023 at 9:23 AM

Nicolai Parlog

@nipafx.dev

Solving today's Advent of Code part 2, I accidentally built a non-deterministic program. 🙈 Can you spot where the non-determinism comes from?

(Knowing the problem helps understanding the code but it's not necessary to spot my bug.)

$void main() { System.out.println(sumCalibrationValues(inputs)); } int sumCalibrationValues(Collection<String> inputs) { return inputs.stream() .mapToInt(this::extractCalibrationValue) .sum(); } int extractCalibrationValue(String line) { var digits = replaceNumberWords(line) .chars() // integers [0-9] are in interval [48-57] .mapToObj(c -> c - 48) .filter(digit -> 0 <= digit && digit <= 9) .toList(); System.out.println(STR."\{line} -> \{digits}"); return digits.getFirst() * 10 + digits.getLast(); }$ String replaceNumberWords(String line) {
for (var pair : numberWords.entrySet()) {
line = line.replaceAll(pair.getKey(), pair.getValue());
}
return line;
}

final Map<String, String> numberWords = Map.of(
"zero", "0",
"one", "1",
"two", "2",
"three", "3",
"four", "4",
"five", "5",
"six", "6",
"seven", "7",
"eight", "8",
"nine", "9"
);

String replaceNumberWords(String line) {
for (var pair : numberWords.entrySet()) {
line = line.replaceAll(pair.getKey(), pair.getValue());
}
return line;
}

final Map<String, String> numberWords = Map.of(
"zero", "0",
"one", "1",
"two", "2",
"three", "3",
"four", "4",
"five", "5",
"six", "6",
"seven", "7",
"eight", "8",
"nine", "9"
);

December 1, 2023 at 10:52 AM

Nicolai Parlog

@nipafx.dev

Got questions about Java? We're here to answer them! Ask us anything in the replies below ( your question if it was already asked) and we'll answer as many as possible in the Inside Java Newscast on October 19th.

September 29, 2023 at 8:51 AM

Nicolai Parlog

@nipafx.dev

Couldn't be there on Tuesday for the Java 21 live stream? Or maybe just not the entire 8 hours? No worries, the video is up under the same URL (youtube.com/watch?v=E8NV...) and I just added time stamps, so you can easily skip to the portion you find most interesting. Enjoy!

Screenshot of YouTube chapters:

~~ Chapters ~~
0:00 Countdown
0:23 Java 21 preview
31:29 Playground reveal
1:03:57 Virtual threads tutorial
#RoadTo21 ⇝ • Java 21 new feature: Virtual Threads ...
1:37:22 Virtual thread Q&A with Ron Pressler
2:00:02 Virtual thread support by Helidon (Tomas Langer) and Weblogic (Sid Joshi)
2:26:48 CloudWorld Java panel
3:15:17 dev.java community contributions
3:27:48 Pattern matching tutorial
#RoadTo21 ⇝ • Java21 Brings Full Pattern Matching #...
3:51:23 Pattern matching Q&A with Brian Goetz
4:29:06 Java 21 performance improvements
#RoadTo21 ⇝ • Java 21 JVM & GC Improvements #RoadTo21
4:41:11 Conversation with Geoffrey de Smet
4:59:33 OpenJDK release process with Mark Reinhold
5:31:03 Live at Paris JUG
5:58:49 Live at JUG Karlsruhe
6:23:23 Java 17-21 API improvements
#RoadTo21 ⇝ • Java 21 API New Features #RoadTo21
6:40:12 API Q&A with Stuart Marks
7:31:27 Ground floor at Oracle CloudWorld with Georges

September 21, 2023 at 10:57 AM

Add to Home Screen

Light up
your news

Add to Home Screen

Light upyour news

Sign in to Lightnews

Sign up to start reading

Connect Bluesky

Connect with Bluesky

Light up
your news