Daniel Kec
@kec.bsky.social
Java developer @OracleCZ working on @helidon_project
The views expressed here are mine and do not necessarily reflect the views of Oracle
The views expressed here are mine and do not necessarily reflect the views of Oracle
Last week, I attended an excellent JUG meetup! The attendance at Poznan JUG was great, and the discussions were engaging. The theater venue was simply superb. I'm glad I had the opportunity to share some thoughts on #VirtualThreads and the @helidon-io.bsky.social .
October 14, 2025 at 3:40 PM
Last week, I attended an excellent JUG meetup! The attendance at Poznan JUG was great, and the discussions were engaging. The theater venue was simply superb. I'm glad I had the opportunity to share some thoughts on #VirtualThreads and the @helidon-io.bsky.social .
Reposted by Daniel Kec
A nice run around the islands of #JavaCro with @kec.bsky.social
#runWithJakartaEE #EclipseFoundation #Community #JakartaEE
#runWithJakartaEE #EclipseFoundation #Community #JakartaEE
October 14, 2025 at 10:00 AM
A nice run around the islands of #JavaCro with @kec.bsky.social
#runWithJakartaEE #EclipseFoundation #Community #JakartaEE
#runWithJakartaEE #EclipseFoundation #Community #JakartaEE
October 8, 2025 at 1:34 PM
Reposted by Daniel Kec
New blog post:
"LangChain4j streaming chat over Java Stream"
by @kec.bsky.social :
medium.com/helidon/lang...
"LangChain4j streaming chat over Java Stream"
by @kec.bsky.social :
medium.com/helidon/lang...
LangChain4j streaming chat over Java Stream
LangChain4j streaming chat over Java Stream
medium.com
October 7, 2025 at 2:53 PM
New blog post:
"LangChain4j streaming chat over Java Stream"
by @kec.bsky.social :
medium.com/helidon/lang...
"LangChain4j streaming chat over Java Stream"
by @kec.bsky.social :
medium.com/helidon/lang...
Reposted by Daniel Kec
We had a great time at ⚔️ Battle of frameworks #CZJUG meetup!
With great venue and catering sponsored by @tricentis.bsky.social we have started the competition by laying out the strengths of respective frameworks @quarkus.io , @helidon-io.bsky.social , and @payara.bsky.social.
With great venue and catering sponsored by @tricentis.bsky.social we have started the competition by laying out the strengths of respective frameworks @quarkus.io , @helidon-io.bsky.social , and @payara.bsky.social.
October 5, 2025 at 12:49 PM
We had a great time at ⚔️ Battle of frameworks #CZJUG meetup!
With great venue and catering sponsored by @tricentis.bsky.social we have started the competition by laying out the strengths of respective frameworks @quarkus.io , @helidon-io.bsky.social , and @payara.bsky.social.
With great venue and catering sponsored by @tricentis.bsky.social we have started the competition by laying out the strengths of respective frameworks @quarkus.io , @helidon-io.bsky.social , and @payara.bsky.social.
Reposted by Daniel Kec
Get ready for another #CZJUG ☕ meetup. And this one is going to be a banger 🥊. Three frameworks ⚙️, three champions 👑, one result 🏆. Fighting arena and medical services 🚑 will be provided by Tricentis.
www.meetup.com/czjug-prague...
www.meetup.com/czjug-prague...
⚔️ Battle of frameworks, Wed, Oct 1, 2025, 5:30 PM | Meetup
CZJUG Prague on tour are usual CZJUG Prague meetups taking place at a location hosted by one of our partner companies.
This time, our CZJUG on tour meetup will be hosted b
www.meetup.com
September 24, 2025 at 8:56 AM
Get ready for another #CZJUG ☕ meetup. And this one is going to be a banger 🥊. Three frameworks ⚙️, three champions 👑, one result 🏆. Fighting arena and medical services 🚑 will be provided by Tricentis.
www.meetup.com/czjug-prague...
www.meetup.com/czjug-prague...
Reposted by Daniel Kec
Java 25 / JDK 25: Features since the previous long-term support (LTS) release: openjdk.org/projects/jdk...
#Java25 #JDK25 #OpenJDK #Java
#Java25 #JDK25 #OpenJDK #Java
JEPs in JDK 25 integrated since JDK 21
openjdk.org
September 23, 2025 at 5:53 PM
Java 25 / JDK 25: Features since the previous long-term support (LTS) release: openjdk.org/projects/jdk...
#Java25 #JDK25 #OpenJDK #Java
#Java25 #JDK25 #OpenJDK #Java
Oracle #GenAI models are now available in #LangChain4j. It's a small contribution from Helidon team to enable powerful #Oracle #AI platform in Java landscape and in #Helidon too 😎
medium.com/helidon/anno...
medium.com/helidon/anno...
Announcement: Adding OCI Generative AI Support to LangChain4j and Helidon
Announcement: Adding OCI Generative AI Support to LangChain4j and Helidon
medium.com
June 26, 2025 at 2:10 PM
Oracle #GenAI models are now available in #LangChain4j. It's a small contribution from Helidon team to enable powerful #Oracle #AI platform in Java landscape and in #Helidon too 😎
medium.com/helidon/anno...
medium.com/helidon/anno...
Reposted by Daniel Kec
Today is the day! Last @czjug.bsky.social meetup before the summer. GraalPy: Java❤️Python @stevesindelarcz from @graalvm.org team will bridge modern #Python and the #JVM ecosystem!
There will be🍕sponsored by #sky and contest for free @jetbrains.com licences!
www.meetup.com/czjug-prague...
There will be🍕sponsored by #sky and contest for free @jetbrains.com licences!
www.meetup.com/czjug-prague...
CZJUG on tour: GraalPy: Java ❤️ Python, Tue, Jun 10, 2025, 6:00 PM | Meetup
CZJUG Prague on tour are usual CZJUG Prague meetups taking place at a location hosted by one of our partner companies.
This time, our CZJUG on tour meetup will be hosted b
www.meetup.com
June 10, 2025 at 9:35 AM
Today is the day! Last @czjug.bsky.social meetup before the summer. GraalPy: Java❤️Python @stevesindelarcz from @graalvm.org team will bridge modern #Python and the #JVM ecosystem!
There will be🍕sponsored by #sky and contest for free @jetbrains.com licences!
www.meetup.com/czjug-prague...
There will be🍕sponsored by #sky and contest for free @jetbrains.com licences!
www.meetup.com/czjug-prague...
Reposted by Daniel Kec
OTD…May 23, 1995
Happy Birthday, #Java! Here’s to 30+ more years with a beautiful combination of technology innovation and community participation!
Happy Birthday, #Java! Here’s to 30+ more years with a beautiful combination of technology innovation and community participation!
May 23, 2025 at 1:29 PM
OTD…May 23, 1995
Happy Birthday, #Java! Here’s to 30+ more years with a beautiful combination of technology innovation and community participation!
Happy Birthday, #Java! Here’s to 30+ more years with a beautiful combination of technology innovation and community participation!
Reposted by Daniel Kec
🚀 @czjug.bsky.social events continue. Join us at #Oracle Prague offices to learn 💡 from Štěpán Šindelář about bridging modern Python 🐍 and the JVM ☕ ecosystem with #GraalPy and @graalvm.org
🍕 at the venue and discussion over 🍻 afterwards .
#JUG #GraalPy #Java #Python #JVM #Prague
🍕 at the venue and discussion over 🍻 afterwards .
#JUG #GraalPy #Java #Python #JVM #Prague
CZJUG on tour: GraalPy: Java ❤️ Python, Tue, Jun 10, 2025, 6:00 PM | Meetup
CZJUG Prague on tour are usual CZJUG Prague meetups taking place at a location hosted by one of our partner companies.
This time, our CZJUG on tour meetup will be hosted b
www.meetup.com
May 22, 2025 at 9:28 AM
🚀 @czjug.bsky.social events continue. Join us at #Oracle Prague offices to learn 💡 from Štěpán Šindelář about bridging modern Python 🐍 and the JVM ☕ ecosystem with #GraalPy and @graalvm.org
🍕 at the venue and discussion over 🍻 afterwards .
#JUG #GraalPy #Java #Python #JVM #Prague
🍕 at the venue and discussion over 🍻 afterwards .
#JUG #GraalPy #Java #Python #JVM #Prague
Reposted by Daniel Kec
After some minor technical difficulties we are back for the second talk of @czjug.bsky.social and #KBTechMeet with Haoyi Li talking about (possibly) better future for java build tools.
May 14, 2025 at 5:47 PM
After some minor technical difficulties we are back for the second talk of @czjug.bsky.social and #KBTechMeet with Haoyi Li talking about (possibly) better future for java build tools.
Reposted by Daniel Kec
Another @czjug.bsky.social in progress together with #KBTechMeet. Starting with Jirka Pinkas and his talk about DDD.
May 14, 2025 at 4:19 PM
Another @czjug.bsky.social in progress together with #KBTechMeet. Starting with Jirka Pinkas and his talk about DDD.
Just learned at #geecon that @adambien.blog never worked!
May 14, 2025 at 1:34 PM
Just learned at #geecon that @adambien.blog never worked!
Reposted by Daniel Kec
We just integrated a performance improvement to Java String that will provide a ~10x performance boost in some applications where Strings are used as keys and where the associated values are constant foldable. This will make JDK 25 faster.
github.com/openjdk/jdk/...
github.com/openjdk/jdk/...
April 22, 2025 at 3:14 PM
We just integrated a performance improvement to Java String that will provide a ~10x performance boost in some applications where Strings are used as keys and where the associated values are constant foldable. This will make JDK 25 faster.
github.com/openjdk/jdk/...
github.com/openjdk/jdk/...
Reposted by Daniel Kec
Martin Ladecký walking us through the development of #Loono ‘s Preventivka app 📱 at yet another @czjug.bsky.social meetup ☕️. This time hosted by Commerzbank Czech Republic .
Thank you 🙏🎉
Thank you 🙏🎉
April 22, 2025 at 4:29 PM
Martin Ladecký walking us through the development of #Loono ‘s Preventivka app 📱 at yet another @czjug.bsky.social meetup ☕️. This time hosted by Commerzbank Czech Republic .
Thank you 🙏🎉
Thank you 🙏🎉
Reposted by Daniel Kec
Do you want to know how Loono App was made? Let's meet at a Deep Dive into the Tech Stack and Design Choices of a Mobile Health App.
Event is free, registration is needed.
www.meetup.com/czjug-prague...
On Tuesday 22.4. at Commerzbank AG in their offices at Karlovo nám. 2097/10, 120 00 Nové Město
Event is free, registration is needed.
www.meetup.com/czjug-prague...
On Tuesday 22.4. at Commerzbank AG in their offices at Karlovo nám. 2097/10, 120 00 Nové Město
CZJUG on tour: Building Loono, Tue, Apr 22, 2025, 6:00 PM | Meetup
CZJUG Prague on tour are usual CZJUG Prague meetups taking place at a location hosted by one of our partner companies.
This time, our CZJUG on tour meetup will be hosted b
www.meetup.com
March 27, 2025 at 6:06 PM
Do you want to know how Loono App was made? Let's meet at a Deep Dive into the Tech Stack and Design Choices of a Mobile Health App.
Event is free, registration is needed.
www.meetup.com/czjug-prague...
On Tuesday 22.4. at Commerzbank AG in their offices at Karlovo nám. 2097/10, 120 00 Nové Město
Event is free, registration is needed.
www.meetup.com/czjug-prague...
On Tuesday 22.4. at Commerzbank AG in their offices at Karlovo nám. 2097/10, 120 00 Nové Město
Reposted by Daniel Kec
Leyden vs. Native Image vs. CRaC — What makes Helidon start faster?
In a new article, @kec.bsky.social explores and benchmarks the three leading approaches to Java startup optimization, comparing real-world performance and trade-offs.
medium.com/helidon/heli...
In a new article, @kec.bsky.social explores and benchmarks the three leading approaches to Java startup optimization, comparing real-world performance and trade-offs.
medium.com/helidon/heli...
Helidon and AOT startup optimization benchmark
Leyden vs. Native Image vs. CRaC, which makes Helidon start faster?
medium.com
March 27, 2025 at 1:41 PM
Leyden vs. Native Image vs. CRaC — What makes Helidon start faster?
In a new article, @kec.bsky.social explores and benchmarks the three leading approaches to Java startup optimization, comparing real-world performance and trade-offs.
medium.com/helidon/heli...
In a new article, @kec.bsky.social explores and benchmarks the three leading approaches to Java startup optimization, comparing real-world performance and trade-offs.
medium.com/helidon/heli...
Reposted by Daniel Kec
Join Arjav Desai and Adao Oliveira Junior for their session at Arc of AI Conference, to dive into Java based RAG with LLMs and shape the future of Java and AI! 💫
www.arcofai.com/speaker/c3a4...
Secure your tickets now!
Use JOIN-ARJAV-50OFF for discount
📅Mar 31-Apr 3
🎟️ arcofai.com
www.arcofai.com/speaker/c3a4...
Secure your tickets now!
Use JOIN-ARJAV-50OFF for discount
📅Mar 31-Apr 3
🎟️ arcofai.com
March 24, 2025 at 6:00 PM
Join Arjav Desai and Adao Oliveira Junior for their session at Arc of AI Conference, to dive into Java based RAG with LLMs and shape the future of Java and AI! 💫
www.arcofai.com/speaker/c3a4...
Secure your tickets now!
Use JOIN-ARJAV-50OFF for discount
📅Mar 31-Apr 3
🎟️ arcofai.com
www.arcofai.com/speaker/c3a4...
Secure your tickets now!
Use JOIN-ARJAV-50OFF for discount
📅Mar 31-Apr 3
🎟️ arcofai.com
Java Time Capsule was such a cool idea! Last time seen in the hands of @smarks.bsky.social, asking if anyone has a shovel #javaturns30
March 22, 2025 at 10:16 AM
Java Time Capsule was such a cool idea! Last time seen in the hands of @smarks.bsky.social, asking if anyone has a shovel #javaturns30
We had a blast with @helidon-io.bsky.social at #JavaOne. Met great people and got surprised by some very cool Helidon deployments out there! #javaturns30
March 21, 2025 at 6:29 AM
We had a blast with @helidon-io.bsky.social at #JavaOne. Met great people and got surprised by some very cool Helidon deployments out there! #javaturns30
Reposted by Daniel Kec
A great proposal from Red Hat and IBM to unify Jakarta EE and MicroProfile. The technologies would be stronger together and this is a good thing for everyone! groups.google.com/g/microprofi...
March 19, 2025 at 9:38 PM
A great proposal from Red Hat and IBM to unify Jakarta EE and MicroProfile. The technologies would be stronger together and this is a good thing for everyone! groups.google.com/g/microprofi...
Reposted by Daniel Kec
Properly dressed in @jakarta.ee gear for the JavaOne morning run. With @kec.bsky.social
#JakartaEE #EclipseFoundation #Community #JavaOne
#JakartaEE #EclipseFoundation #Community #JavaOne
March 19, 2025 at 9:19 PM
Properly dressed in @jakarta.ee gear for the JavaOne morning run. With @kec.bsky.social
#JakartaEE #EclipseFoundation #Community #JavaOne
#JakartaEE #EclipseFoundation #Community #JavaOne