Ole Vedel Villumsen

Ole Vedel Villumsen

@olevv.bsky.social

Any pronouns (most use he/him). Software developer (Java), father of two teenagers, amateur musician. Concerned about the climate and man-made climate change.

72 followers289 following265 posts

Ole Vedel Villumsen
@olevv.bsky.social

I support Wikipedia, where information is still human-created, fact-checked, and 100% free. Join me! donate.wikimedia.org It doesn’t take a big amount from each of us to make a big difference for freedom of information (I signed up for donating the equivalent of just 31 US $ or 27 Euro a year).

donate.wikimedia.orgMake your donation now - Wikimedia FoundationDonate to the Wikimedia Foundation, the nonprofit that hosts Wikipedia and other crucial free knowledge projects. Each year, the generosity of the 2% of readers who donate allows us to expand the reac...
Ole Vedel Villumsen
@olevv.bsky.social

It’s become a sport to plan my train travel so well ahead that I can get the cheapest fares. Very often I pay a third of the standard fare or less. #DSB #orangebilletter #train

Ole Vedel Villumsen
@olevv.bsky.social

I reviewed a pull request where a colleague had converted several immutable #Java classes to record classes. *Soooo* much terser! It hurt to tell them that for backward compatibility we still need getters with names that start with get. #JavaRecords #Java17

Ole Vedel Villumsen
@olevv.bsky.social

#ArtFight #ArtFight2026 #ArtFightRevenge

DinoNerdiest@dinonerdiest65.bsky.social

mooooreee artfight revenge against Siivekaskruunu he made a really awesome attack with aeklys and astrea that im still sooo excited about im jumping for joy hitting back with this beast :) its so fun getting to work with such different designs than im used to, its part of what i love about artfight

Ole Vedel Villumsen reposted

Jason Parker (he/they)
@handle.invalid

@mullvadnet trying to gaslight the #Fediverse about "free speech" and fascism, and posting the same obviously PR-approved response to multiple negative posts about their co-CEO / co-founder donating money to fascists sure is a choice.

Ole Vedel Villumsen reposted

Acyn
@acyn.bsky.social

De Niro: Loving our country is starting to sound like an abused spouse saying they love their abuser. I can’t love a country that starts stupid and inhumane wars, killing thousands of innocents… I can’t love a country that’s led by a xenophobic tyrant. I can’t love a country that’s led by Trump

Ole Vedel Villumsen reposted

Gleam Programming Language
@gleam.run

The rainbow is here all year long, so we don't need to change the profile for June. But it is a good time to remind everyone that LGBTQIA+ rights are under attack all year long as well. And to steal @haskell.org's message: there would be no Gleam without trans people 🩵🩷🤍

Ole Vedel Villumsen
@olevv.bsky.social

#Jira is blocking me from doing my work. The question pops up at semi-unpredictable times, and there is no way around it and back to Jira page I wanted to work on. It’s a pain.

Ole Vedel Villumsen
@olevv.bsky.social

I admit that before coming to #Jfokus2026 I thought virtual threads in #Java sounded like a good idea, but it was unclear what I wanted to use them for. After the talks and lab in the conference I have a very clear picture.

Ole Vedel Villumsen
@olevv.bsky.social

I spent the day playing with #EclipseCollections. First impression is it can advantageously replace 75 % of #JavaCollectionsFramework. For a few classes, like LinkedHashMap, I didn’t find a good replacement. Luckily the two libraries interoperate surprisingly well. #Java

Ole Vedel Villumsen
@olevv.bsky.social

I spent the day playing with #EclipseCollections. First impression is it can advantageously replace 75 % of #JavaCollectionsFramework. For a few classes, like LinkedHashMap, I didn’t find a good replacement. Luckily the two libraries interoperate surprisingly well. #Java

Ole Vedel Villumsen
@olevv.bsky.social

First time I coded a #sealedInterface in #Java. A method could return 3 different results, each with its own supplementary information. A sealed interface and three implementing record types seemed right.

Ole Vedel Villumsen reposted

Dr. Sandra Steingraber 🏳️‍🌈
@ssteingraber1.bsky.social

NEW RESEARCH: Climate change on track to slash global crop yields by 24% before 2100. Like, within the lifespan of your kids. Also: adaptation and new farmland can’t offset this loss. Sorry, AI can’t fix this. agupdate.com/agriview/mar...

agupdate.comClimate change will devastate crop yieldsA sweeping new analysis finds that warming global temperatures will dampen the world’s capacity to produce food from most staple crops, even after accounting for economic development and adaptation by
Ole Vedel Villumsen
@olevv.bsky.social

Of the people praising IntelliJ IDEA (for instance of the occasion of its 25th birthday), how many have been given a license they don’t pay for? How does this contribute to the amount of praise? And how many of them mention the gift along with the praise (I haven’t seen any yet)?

Ole Vedel Villumsen reposted

Sleestak
@sleestak.bsky.social

These are the icy mountains of Pluto. It took 9 years to get these magnificent images… and 4.8 billion kilometers.

Ole Vedel Villumsen reposted

Luca Casonato 🏳️‍🌈
@lcas.dev

A thread 🧵 of _terrible_ design decisions for the internal APIs of the two Italian high speed train operators, Italo and Trenitalia. Hardcoded passwords, terrible translations, spelling mistakes, xml in json (but utf8 encoded and transmitted as an array of numbers), it's all here. Enjoy!

Ole Vedel Villumsen
@olevv.bsky.social

A colleague objected to using the assert keyword in production Java code. He thinks it will only ever be checked during running unit tests and prefers to have the assertion in the test. 1/2 #Java

Ole Vedel Villumsen
@olevv.bsky.social

(1) No matter if ever checked I want the assertion in the production code since the information it carries helps understand the code. (2) It has been convincingly argued that you also check assertion in staging and production environments. 2/2

Ole Vedel Villumsen
@olevv.bsky.social

My teenager and a friend asked who invented, owns and develops Java. I gave them the very short story from memory. Java was developed by a group lead by James Gosling and was launched by a company named Sun Microsystems Inc. (1/4) #Java #techhistory

Ole Vedel Villumsen
@olevv.bsky.social

My teenager and a friend asked who invented, owns and develops Java. I gave them the very short story from memory. Java was developed by a group lead by James Gosling and was launched by a company named Sun Microsystems Inc. (1/4) #Java #techhistory

Ole Vedel Villumsen
@olevv.bsky.social

Much of the further development — definitely still active — happens in a cooperation with everyone interested (that is, big companies that are willing to play their employees for participating) with Oracle as chair. We’re generally very satisfied with this way and its outcomes. (3/4)

Ole Vedel Villumsen
@olevv.bsky.social

My teenager and a friend asked who invented, owns and develops Java. I gave them the very short story from memory. Java was developed by a group lead by James Gosling and was launched by a company named Sun Microsystems Inc. (1/4) #Java #techhistory

Ole Vedel Villumsen
@olevv.bsky.social

Sun was otherwise mostly known for building (small) computers. Oracle, mostly known for databases, bought Sun at a point because they wanted Java (and after that sold many other parts of Sun off again). (2/4)

Ole Vedel Villumsen reposted

Dieselbrain
@dieselbrain.bsky.social

#SaveSpeech Opposition to Chat Control within Denmark is growing. If you are a Danish citizen, please sign this petition: www.borgerforslag.dk/se-og-stoet-... At 50k sigs, it is submitted to the parliament and undergoes the standard leg process, including potential debates, review, and vote.

borgerforslag.dkNej til EU’s “Masseovervågning” beskyt vores privatliv, digitale sikkerhed og ytringsfrihed.Vi beder Danmark om at stemme nej til EU’s “Chatkontrol” en lov, der pålægger masseovervågning af alle borgere ved at scanne private beskeder, e-mails
Ole Vedel Villumsen
@olevv.bsky.social

I do not 100 % agree to the article’s recommendation to avoid Java’s ZonedDateTime class as fundamentally flawed. While my user may know what is meant by “2:00 PM”, I would like that my program “knows” too. With a Java LocalDateTime alone it does not. A ZonedDateTime makes sure it does.