Kamil Banach
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Kamil Banach
@banach.net.pl
100 followers 120 following 110 posts
Software Engineer, Speaker, Builder, Oracle ACE

🚀 Building https://signaturky.com - blazingly fast domain signature management tool
🌐 Blogging at https://banach.net.pl
Posts Replies Media Videos
banach.net.pl
And here I am on #JDD2025 😊
October 21, 2025 at 12:53 PM
banach.net.pl
The best kind of Merge Requests 😍
October 14, 2025 at 2:33 PM
banach.net.pl
Look what an elegant kitty I have met while coming back from the Confitura Conference!

Elegant #cat checking their neighborhood!
photo of the cat looking at the photographer. nice cat
September 20, 2025 at 4:51 PM
banach.net.pl
Java Streams can be tricky - do you know what will be printed when running the following code? 👀

Answer below 👇

#java #streams
September 17, 2025 at 10:30 AM
banach.net.pl
Już w czwartek, 18/09, będę miał okazje poopowiadać o Streamach w Javie!

Jeżeli jesteś zainteresowany Javą, trochę programowaniem funkcyjnym, a trochę nowymi ficzerami w Javie - wpadnij, wstęp za darmo (a link poniżej 👇).
September 17, 2025 at 8:25 AM
banach.net.pl
Java 25 is out! 🚀

There are 10 (❗) non-preview, non-experimental JEPs (including Scoped Values, Module import declarations, Compact source files, Flexible constructor bodies) + many fixes.
Image with Java logo and message Java 25 is out!
September 17, 2025 at 5:43 AM
banach.net.pl
I'll be speaking at JDD in Krakow on 21–22 October 2025! 🎉

If you're into Java, Streams, and want to learn more about Stream Gatherers — introduced in JDK 24 — join me at the conference!

PS: My talk is titled Thinking in Streams 👀

#JDDKrakow #Java #StreamGatherers
August 8, 2025 at 10:20 AM
banach.net.pl
#GoogleForms tip: If you're creating a form and want users to receive a confirmation of their submission, enable these settings: "Collect email addresses" and "Send responders a copy of their response". 🙂

This setup allows custom email and copy on demand.
July 21, 2025 at 7:34 AM
banach.net.pl
Video editing (and recording) isn’t really my thing - but I have to admit, seeing the results is pretty rewarding! 😊
I’m not trading code for cuts anytime soon, but wow, the tools these days are impressive.
July 19, 2025 at 8:37 PM
banach.net.pl
I'm honored to share that I've been recognized as an Oracle ACE Associate ♠️ for my community contributions!

#OracleACE @oracleace.bsky.social
Oracle ACE Associate certificate issued for Kamil Banach for the period June 2024 - May 2025.
July 11, 2025 at 9:02 AM
banach.net.pl
Today, I am working on the image upload feature.

It is quite amazing that with a couple of lines of CSS and JS, I can transform the boring upload input into something that looks nice. 😍
Input to select file - drop area with message "Drag and drop or click to browse to upload. PNG, JPG or GIF (max. 800x400px, 150kB)" and banner image with skyscrappers and text 'Building today for the future Sustainable, Smart, and Scalable'.
June 27, 2025 at 9:36 AM
banach.net.pl
TIL that to renew the Tailscale certificate on Synology NAS it is required to do only two steps!

@tailscale.com - you're doing it right! 👍

Commands below: 👇
Screenshot from Synology NAS with certificate created by Tailscale. Domain is not real ;-)
June 18, 2025 at 7:01 AM
banach.net.pl
It is nice to see that the mojaWARSZAWA portal (city portal to pay city taxes, contact the city office and so on) is using a European captcha. 👍
June 16, 2025 at 11:28 AM
banach.net.pl
Did you know that different Garbage Collector will be used for different processor counts?

For instance, when a JVM operates on a single processor, it utilizes the Serial collector, whereas with multiple processors, it switches to GC1.

#Java #JVM
Screenshot with commands that present that different Garbage Collector will be used for different numbers of processors. For single processor (command java -XX:ActiveProcessorCount=1 -Xlog:gc=info -version) it shows 'Using serial'. For more than one processor (command java -Xlog:gc=info -version) it shows 'Using G1'.
June 3, 2025 at 8:44 AM
banach.net.pl
Stream Gatherers are solid addition to #Java (24+).

Look how concise we can write simple implementation of built-in map operation! 🤩
Snippet of code presenting an simple implementation of map using Gatherer.ofSequential.
June 1, 2025 at 11:28 AM
banach.net.pl
Are you waiting for the possibility to run some code before this or super in constructors? Because I am!

This feature is finalizing with JEP 513 in Java 25 - so this autumn code like in screenshot will be possible! 🎉
Snippet of the code showing that class named Clazz is extending the class named OtherClazz. The Clazz has the statement 'this.value = 42' in constructor, before the 'super()' statement.
May 19, 2025 at 2:24 PM
banach.net.pl
I've just update the firmware of my new mice... The future is now 😆
Meme from Malcolm in the Middle - Dewey satying 'The future is now, old man"
May 16, 2025 at 7:27 PM
banach.net.pl
Już za chwilę będę opowiadał o Streamach i Gathererach (nowy ficzer w Javie 24) na konferencji Javeloper! 🎉

Serdeczenie zapraszam, link do streamu poniżej. 👇

www.youtube.com/watch?v=zuDw...
Grafika promocyjna konferencji Javeloper (15.05.2025) - Kamil Banach z tematem 'Thinking in Streams'
May 15, 2025 at 12:20 PM
banach.net.pl
Już w przyszłym tygodniu będzie można posłuchać, jak opowiadam o Streamach i Gathererach - nowym ficzerze w Javie 24.

Za darmo i z własnego fotela (albo sofy, albo łóżka - można nawet na stojąco!), bo Javeloper odbywa się online. 🌐

Serdecznie zapraszam!
May 8, 2025 at 8:36 AM
banach.net.pl
There is a 246 MB size gap between the default Java image (Eclipse Temurin with JDK) and the JRE-only Alpine-based one! 😲

You don’t need Ubuntu or a full JDK to run your app - use an Alpine JRE-only image if running is all you need. 🙂
Image from the terminal showing that the Docker image eclipse-temurin:21 size is 429M while the eclipse-temurin:21-jre-alpine is 183M. There are couple of images shown, the size is provided by inspecting size of the image and passing it to numfmt program to have human friendly value.
April 30, 2025 at 11:28 AM
banach.net.pl
Woah, last Saturday I was a speaker at Warsaw IT Days!

It was nice to see a full room even if the topic is not 'trendy' - as it was 'only' about Docker and Java, not about AI or LLMs 😅
Photo from the list of presentations during Warsaw IT Days 2025 - among the presentations "Docker (nie tylko) dla programistów Java" ("Docker (not only) for Java developers").
April 10, 2025 at 8:11 AM
banach.net.pl
Już niedługo na Warszawskich Dniach Informatyki będę mówił o Javie i Dockerze. Nie tylko dla Java developerów 😉
Zdjęcie listy prezentacji w sali 105 na Warszawskich Dniach Informatyki, wśród nich temat "Docker (nie tylko) dla Java developerów".
April 5, 2025 at 7:32 AM
banach.net.pl
There's a special spot in the hell for those who design stickers to peel off like this...
Photo of the sticker that is peeled of from IKEA bin. Sticker is cut to not peel as a whole.
March 10, 2025 at 11:42 AM
banach.net.pl
Working with 'modern' frontend tooling is something like this. 😂

Fortunately restarting language service 'resolves' this issue. Until it appears again. 😂
TypeScript error in a Vue component showing a type mismatch where a function with signature "(modelValue: TOptions) => string" is incorrectly being assigned to a variable of type "string".
March 6, 2025 at 3:42 PM
banach.net.pl
TIL that you can use CTRL + P (to open command palette ) then type "Download" and select "Download attachments for current file" in Obsidian. That's nice!

PS. Works in #Obsidian 1.8+
Command palette in Obsidian - searching for 'download' - only option visible is to 'Download attachments for current file'
March 2, 2025 at 10:38 PM