JCON on JAVAPRO International

Revolutionizing AI Efficiency: Dell and Cyrock.AI Receive AI Award for 80% Energy Savings

Wed, 22 Apr 2026 13:24:49 +0000

Cologne / Berlin, April 22, 2026 – At the international AI developer conference JCON EUROPE 2026 in Cologne, the world-leading server manufacturer Dell Technologies and Cyrock.AI made a major impact by announcing a breakthrough in artificial intelligence: 80% less computing power, energy consumption, and CO₂ emissions for generative AI. This is made possible by the new AI infrastructure software Cyrock.AI – “Made in Germany” – which users can operate on the Dell AI Factory.

Don’t Miss: New AI Award & AI Highlights at JCON 2026

Mon, 20 Apr 2026 13:08:00 +0000

JCON EUROPE 2026 is about to kick off – and anticipation is building. The conference opens its doors today in Cologne, once again bringing together the international Java community. Just ahead of the event, new high-profile AI highlights have been announced, making it one of the most important meeting points for AI and Java experts in Europe.

Focus on AI: Highlights on Wednesday

A special focus is placed on AI on Wednesday, April 22. The day begins with a high-level keynote:

Take Control of GenAI — Without Compromising Your Data

Thu, 09 Apr 2026 11:50:02 +0000

Most GenAI demos look impressive — until data protection becomes a blocker.

Suddenly, you’re dealing with external APIs, unclear data flows, and compliance risks that slow everything down or stop projects entirely.

But what if you could build GenAI systems without any of that?

In this hands-on JCON EUROPE 2026 workshop, “Building Secure, Self-Hosted RAG Systems in Java”, you’ll explore how a fully local, self-hosted RAG system can be implemented — using Java and technologies you fully control.

A Big Screen Experience for Java Developers & Architects

Wed, 08 Apr 2026 12:00:02 +0000

JCON EUROPE 2026 | April 20–23, 2026 | Cinedom Cologne

Anyone talking about modern software development today can hardly avoid Java. Few technologies have shaped the enterprise world as sustainably, and few communities are as vibrant, diverse, and innovation-driven. This is exactly where JCON comes in: as a meeting point, a platform, and an experiential space for developers from all over the world. With participants from more than 70 countries, JCON has long since become an international gathering. Openness, knowledge sharing, and a strong sense of community remain at its core.

Caching and Beyond: Smarter Data Processing with Java - in 2 Hours

Thu, 02 Apr 2026 11:45:01 +0000

Many Java teams start simple — a single database, a straightforward architecture. But as systems evolve, so does the stack: caching layers to improve performance, search engines for faster queries, additional databases for specialized use cases, and now vector stores for AI-driven features.

What begins as optimization often turns into a fragmented landscape of technologies. The result: increasing complexity, higher infrastructure costs, and growing DevOps overhead.

The session “Caching and Beyond – Smarter Data Processing with Java” at JCON EUROPE takes a different approach. Instead of adding more tools, it focuses on simplifying data architectures — using a clean, Java-centric model built on open-source technologies.

Architect Your Own Experience: Creating Your Individual JCON 2026 Journey

Tue, 31 Mar 2026 12:00:03 +0000

The JCON EUROPE 2026, taking place from April 20 to 23 at the Cinedom Multiplex Cinema in Cologne, consistently focuses on a format that offers participants maximum flexibility. Instead of a fixed schedule, the individual design of one’s own conference experience takes center stage.

With a wide range of sessions, formats, and networking opportunities, visitors can decide for themselves which content, conversations, and contacts they want to focus on.

The central foundation for this is the JCON Schedule: participants can create their personal agenda, bookmark relevant sessions, and organize targeted 1:1 meetings with speakers or exhibitors. This turns the conference into something that is not just consumed, but actively shaped—depending on individual interests, projects, and professional priorities.

The Inconvenient Truth About Code, 30 Years of Java & Sovereign AI – The Keynotes of #JCON2026

Fri, 27 Mar 2026 07:00:01 +0000

4 Days | 100+ Speakers | 100+ Sessions | In-Person

JCON EUROPE 2026 is just around the corner and once again brings the international Java community to Cologne. At the Cinedom Cinema, attendees can expect an extensive program with over 100 sessions as well as three central keynotes that will open each conference day.

Three Keynotes at a Glance

Java: 30 Years and Beyond

Tuesday, April 21 | 10:15 AM | Cinema 5
Speaker: Sharat Chander (Senior Director & Head of Global Devleoper Programs, Oracle)

More Than Just a Conference for Java Enthusiasts | JCON 2026

Tue, 24 Mar 2026 12:00:02 +0000

With over 100 speakers, more than 100 sessions, and a diverse supporting program, JCON Europe 2026 once again positions itself as one of the leading events for the Java community. Taking place in Cologne as an in-person conference, the event combines deep technical expertise with a strong focus on creating a highly customizable attendee experience.

A Conference Tailored to You

JCON Europe 2026 is designed to give participants full control over their conference journey. A wide variety of session formats, thematic tracks, and networking opportunities allow developers to build a schedule that aligns with their interests, experience level, and career goals.

High-Demand Workshops at JCON EUROPE 2026 – Tickets Available Now

Mon, 16 Mar 2026 12:00:01 +0000

Cologne – JCON EUROPE returns to its venue from April 20-23, once again offering an extensive program for Java enthusiasts. In addition to over 100 speakers and sessions, Monday, April 20, is fully dedicated to hands-on, expert-led workshops.

Each workshop is a two-hour deep dive into cutting-edge technologies and real-world development topics. Participants can choose from a total of seven different sessions across two time slots: 1:00–3:00 PM and 4:00–6:00 PM. A coffee break in between provides room for informal networking.

How JCON Becomes Your Individual Highlight!

Tue, 03 Mar 2026 12:31:42 +0000

After welcoming attendees from 56 countries across six continents at JCON EUROPE 2025, JCON is aiming to surpass last year’s success and reach new heights.

Live Coding Experience on the Big Screen - unique in Germany

Developers want to see code. For this reason, the 11th edition of JCON will once again take place as an in-person conference in a multiplex cinema in Cologne. The event transforms coding and programming into a cinematic spectacle, ensuring that every detail of the incredible speakers is showcased in full detail on the big screen.

Engineering Intelligence Live: JAVAPRO Benefits for JCON 2026

Wed, 25 Feb 2026 12:00:02 +0000

JCON EUROPE 2026 is coming back to Cologne — and this year brings two major highlights right from the start: a brand-new Premium Track AI focused on production-ready AI for Java teams, and free conference tickets for JAVAPRO readers and authors.

From April 20–23, 2026, the European Java community will once again gather at the Cinedom multiplex cinema, turning one of Germany’s largest movie theaters into a four-day Java experience on the big screen.

Free Tickets for JCON EUROPE 2026

Wed, 11 Feb 2026 12:00:00 +0000

4 Days | 100+ Speaker | 100+ Sessions | In-Person

The Ultimate Java Experience on The Big Screen!

JCON EUROPE 2026 is returning to the big cinema screen from April 20–23, 2026! Join JCON for a top-tier Java conference featuring four parallel tracks, hands-on workshops, and a vibrant international Java community.

📅 Monday, April 20th – Big Workshop Day
📅 Main Conference: April 21st- 23rd – Deep-dive sessions, live coding & networking
📅 Premium AI Track: April 21st - 22nd - Special AI-focused track for VIPs & ticket upgrades
📅 VIP Event: April 22nd – Exclusive gathering with Java experts
🍻 Happy Hour: April 21st - 22nd – Unwind and network with fellow developers

20% Early Bird Ends January 31 — Premium AI Track and 100+ Sessions Await at JCON 2026

Tue, 27 Jan 2026 12:00:02 +0000

With JCON EUROPE 2026 coming up this spring, the discounted Early Bird phase is about to close. The Early Bird ticket offer ends on January 31, 2026 (23:59, Europe/Berlin) — giving attendees roughly one week to secure the reduced rate before regular pricing takes over.

JCON EUROPE 2026 will take place April 20–23, 2026 at Cinedom Cologne, featuring four in-person days of Java content on an unusual but fitting venue: a cinema. Sessions and demos are designed for the big screen, with the program running daily 9:00–18:00 onsite.

JCON EUROPE 2026: Early Bird Ends in Two Weeks — Full Schedule Online

Wed, 21 Jan 2026 10:00:02 +0000

With JCON EUROPE 2026 approaching, the Early Bird ticket phase is about to close — leaving attendees only around two weeks to secure discounted passes. The Early Bird offer runs until January 31, 2026 (23:59, UTC+1) and includes 20% off all conference passes. JCON EUROPE 2026 will take place April 20–23, 2026 at Cinedom Cologne.

For planning purposes, the session schedule is already available online:
https://schedule.jcon.one/2026/

Four Days of Java, Architecture, and Community

The event kicks off with workshops on Monday, April 20, starting at 13:00, followed by three full conference days featuring practical Java deep dives, architecture insights, hands-on demos, mentoring opportunities, and plenty of hallway-track networking. Organizers have also announced a mid-week VIP party.

Code. Collaboration. Community.

Wed, 24 Dec 2025 07:00:02 +0000

JCON USA @ IBM TechXchange 2025 – where the spirit of Java found a new home in Orlando.

When the JCON team announced they were bringing their renowned Java conference series across the Atlantic, expectations were high. Known for its lively spirit and deep technical content, JCON Europe has become a must-attend event for Java developers. Its first U.S. edition – JCON USA @ IBM TechXchange 2025 – not only met those expectations but exceeded them, uniting Java professionals from around the world under one roof in Orlando.

JAVAPRO Magazine JCON & Java 26 Special Edition - Call for Papers

Tue, 11 Nov 2025 12:00:00 +0000

CfP is Open until: November 28, 2025 | Deadline for article submission: January 16, 2026 | Publishing: in April \

Calling all Java Enthusiasts!

After the huge response to our print specials “30 Years of Java” and “Java 25”, we’re now preparing a brand-new edition for JCON EUROPE 2026.

To mark the release of Java 26, we’re publishing a limited JAVAPRO print special that combines standout JCON content with the key innovations in and around Java 26.

JCON EUROPE 2026 - CFP 3 Days left

Wed, 22 Oct 2025 13:24:30 +0000

The Call for Papers for JCON EUROPE 2026 is closing soon, with only three days remaining for submissions. The deadline is Friday, October 24, 2025, at 23:59 (UTC+2).

As the premier in-person Java community conference in Germany, JCON EUROPE will return to the Cinedom in Cologne from April 20–23, 2026, bringing together Java developers, architects, and technology experts from around the world.

The conference is renowned for its distinctive cinema setting, strong community spirit, and high-caliber technical sessions. Attendees can look forward to a packed agenda, a vibrant hallway track, and the popular Mentorship Hub hosted by Bruno Souza, offering direct interaction between newcomers and seasoned industry leaders.

Early Bird 30% — JCON GenAI — The Enterprise Java AI Revolution Begins

Mon, 20 Oct 2025 07:00:03 +0000

No more Python.
The moment for enterprise-grade Generative AI in Java has arrived — and you have the advantage! Almost all major enterprise systems, and the mountains of proprietary data they hold, are built on Java. That makes Java the perfect foundation for high-impact AI projects — but only if you know how to build them right.

JCON GenAI is your high-octane, single-day hands-on workshop series, designed to get you out of theory and into production-ready code. Join leading experts from the Java community and master the tools, architectures, and security foundations needed to drive your company’s AI transformation.

JCON @ IBM TechXchange 2025: Java Community Meets in Orlando

Wed, 01 Oct 2025 13:34:58 +0000

Orlando, Florida – October 6–9, 2025 – The international Java community will come together as part of IBM TechXchange 2025 for a special program track: JCON @ IBM TechXchange 2025. The Java track of the conference is organized by the Java User Group Oberpfalz in cooperation with the trade magazine JAVAPRO and offers developers a platform for exchange, practice, and innovation.

Under the motto “Embrace your Java Journey”, the focus will be on hands-on content: live coding sessions, hands-on workshops, insights into current tools, and contributions to open-source projects. Participants can obtain on-site certifications and connect directly with more than 1,000 experts.

JCON EUROPE 2026 - CFP Is Open

Tue, 23 Sep 2025 12:00:02 +0000

The Call for Papers is now open, and we’re looking for all to share your expertise, showcase cutting-edge solutions, and inspire the community. Got an exciting project? A story to tell? Real-world insights? We want to hear from you!

Be a pioneer: Help shape the future of Java! Present your innovative ideas and projects to an international audience on a giant cinema screen.
Increase your visibility: Position yourself as a recognized authority in the Java community and take advantage of the opportunity for personal 1-on1 Sessions.
Expand your network: Make contacts with leading experts from the Java world and keep your finger on the pulse.
Experience an unforgettable atmosphere: JCON is more than just a conference - it is a celebration of the Java community.

Your Topics

Whether you are interested in Core Java, cloud-native development, microservices, artificial intelligence or other exciting areas - JCON offers a stage for all aspects of the Java world.

IBM Architect Mark Stoodley Reveals JVM Optimization Techniques

Wed, 07 May 2025 10:17:14 +0000

Slow Java startups, repeated JIT compilations, high CPU load: these factors are not just performance issues — they also drive up infrastructure costs and increase the energy consumption of applications. At JCON EUROPE 2025, developers will have a rare opportunity: Mark Stoodley, Chief Architect for Java at IBM, travels from Canada to personally lead an exclusive workshop. The title: “Ultra Efficient Startup for Production Java Workloads” — a hands-on format demonstrating how to run JVM-based production applications more efficiently, faster, and with lower resource consumption.

Optimizing Java Performance: Caching with Core Java Instead of Complex Frameworks

Mon, 05 May 2025 07:00:02 +0000

Slow Java applications are a well-known problem in many projects: delays caused by ORM, complicated caching structures, and overloaded databases slow down performance. At JCON EUROPE 2025, the two-hour workshop “High-Performance Caching with Pure Java: Supercharge Your Sluggy Database Application” will show how to specifically solve these problems — exclusively with Core Java, without additional frameworks or cloud services.

Hands-on: Caching and Queries at Maximum Speed

Participants will learn how to develop a high-performance caching and query layer themselves — lean, memory-efficient, and directly in Java. The goal is to eliminate typical performance bottlenecks in database-based applications and increase system speed many times over.

Local AI with Java: AI Integration Without Cloud Dependency

Fri, 02 May 2025 07:00:03 +0000

The future of artificial intelligence is local. Increasingly, companies are turning to local AI models to ensure data privacy, offline capabilities, and independence from cloud providers. At JCON EUROPE 2025, the two-hour “AI-based optimization in expedition planning – a practice-oriented workshop” with Sven Ruppert will demonstrate exactly how to implement this in Java: high-performance, privacy-friendly AI features – directly in your own application, entirely without cloud services.

Focus on the Open-Source Project “Expedition Planner”

At the center is the open-source project “Expedition Planner”, a Java-based web application designed for planning and organizing expeditions. However, this isn’t just theory: participants will work on real-world use cases, integrating local AI models with Ollama, utilizing Langchain4j and Retrieval Augmented Generation (RAG) to optimize task planning and equipment lists intelligently.

Gen-AI with Java: Build an Intelligent Chat Assistant in Just Two Hours

Wed, 30 Apr 2025 12:17:30 +0000

Generative AI is no longer limited to research labs – it’s ready for real-world application. At JCON EUROPE 2025, Java developers will have the opportunity to experience exactly that: In a two-hour workshop, participants will learn how to build an intelligent chat assistant from scratch using Helidon and LangChain4J – practical, production-ready, and Java-first.

From Concept to Working Application

The hands-on session “Build an AI-Powered Application with Helidon and LangChain4J” focuses on direct implementation: no slides, no theory – just real code, modern tools, and comprehensible architectures. The goal is to create a functional Gen-AI-powered chat assistant that not only works as a demo but can also be expanded into real-world projects.

Dynamic Caching for Massive Workloads: Pure Java Solutions First-Hand

Tue, 29 Apr 2025 08:54:00 +0000

Many Java developers encounter the limitations of traditional caching and database solutions when dealing with large amounts of data and dynamically growing workloads. Heavyweight systems often prevent flexible scaling or unnecessarily increase infrastructure costs.

The session "High-Performance Caching with Pure Java – Part 2: Managing Gigantic Workloads" at JCON EUROPE 2025 presents an approach that does things differently: Instead of complex architectures, this approach relies on pure Java – lean, scalable, and powerfull.

JUnit 5: Eight Years of Innovation – Many Java Developers Are Falling Behind

Mon, 28 Apr 2025 12:23:46 +0000

In many projects, JUnit is still used the way it was years ago — without taking advantage of the relevant innovations introduced in recent releases. Yet JUnit 5 has evolved significantly since its initial release: over eight years and twelve major updates, it has become a powerful, flexible, and extensible testing platform.

The JUnit 5 Revolution: First-Hand Insights

At JCON EUROPE 2025, developers will have the opportunity to not only discover the latest features of JUnit 5 but also to apply them directly. In the two-hour hands-on session "Catching up with JUnit 5", two key members of the JUnit team will guide participants through the most important developments.

Goodbye to ORM Pain: EclipseStore Hands-On with the Lead of the Open-Source Project

Thu, 24 Apr 2025 12:19:17 +0000

Many Java developers are all too familiar with the downsides of traditional ORM frameworks: performance bottlenecks under scale, complex serialization, and recurring issues when refactoring persistent object models. If you’re looking for a modern, high-performance alternative, EclipseStore deserves a closer look – and not just in theory, but in practice.

Experience EclipseStore in Action – Led by a Core Contributor

At this year’s JCON EUROPE 2025, you’ll have a unique opportunity to get hands-on with EclipseStore. Florian Habermann, CTO of MicroStream Software and a core contributor to EclipseStore, is hosting a two-hour practical workshop. Rather than sitting through slides, participants will actively code – in their own IDEs, with Java, and against production-relevant use cases.

High-Demand Workshops at JCON EUROPE 2025 – Tickets Available Now

Thu, 10 Apr 2025 07:00:03 +0000

Cologne – JCON EUROPE returns to its venue from May 12–15, once again offering an extensive program for Java enthusiasts. In addition to over 100 speakers and sessions, Monday, May 12 is fully dedicated to hands-on, expert-led workshops.

JCON EUROPE 2025: Live Coding, Networking & Community-Highlights

Tue, 08 Apr 2025 10:00:01 +0000

4 Days | 100+ Speaker | 100+ Sessions | 9 Workshops | In-Person

JCON EUROPE 2025 returns as one of the leading Java community events in Europe. Last year’s edition welcomed participants from 56 countries across six continents. The 10th edition will not only feature a packed schedule of technical sessions and live coding formats, but will also place a stronger emphasis on personal exchange and community interaction. Several curated networking formats will complement the conference program, offering attendees direct access to speakers, experts, and peers.

Free Tickets for JCON EUROPE 2025

Thu, 27 Mar 2025 17:13:21 +0000

4 Days | 100+ Speaker | 100+ Sessions | In-Person

The Ultimate Java Experience on The Big Screen!

JCON EUROPE 2025 is returning to the big cinema screen from May 12th - 15th, 2025! Join JCON for a top-tier Java conference featuring four parallel tracks, hands-on workshops, and a vibrant international Java community.

📅 Monday, May 12th – Big Workshop Day
📅 Main Conference: May 13th - 15th – Deep-dive sessions, live coding & networking
📅 VIP Event: May 14th – Exclusive gathering with Java experts
🍻 Happy Hour: May 13th - 14th – Unwind and network with fellow developers

JCON EUROPE 2025 - CFP Is Open

Fri, 18 Oct 2024 21:43:36 +0000

Be a pioneer: Help shape the future of Java! Present your innovative ideas and projects to an international audience on a giant cinema screen.
Increase your visibility: Position yourself as a recognized authority in the Java community and take advantage of the opportunity for personal 1-on1 Sessions.
Expand your network: Make contacts with leading experts from the Java world and keep your finger on the pulse.
Experience an unforgettable atmosphere: JCON is more than just a conference - it is a celebration of the Java community.

Your Topics

Whether you are interested in Core Java, cloud-native development, microservices, artificial intelligence or other exciting areas - JCON offers a stage for all aspects of the Java world.

Save The Date - JCON EUROPE 2025

Fri, 18 Oct 2024 19:03:32 +0000

4 Days | 100+ Speakers | 100+ Sessions | daily 9am - 18pm live |

May 19-22 | Join us in Cologne, Germany for 3 days of Java-powered excitement and a workshop day on Monday. We’ll take over our beloved Cinedom the multiplex cinema in Cologne, Germany and end with a massive birthday bash on Thursday, May 22nd to honor Java’s incredible 30-year journey.

Why JCON EUROPE

This isn’t just a conference; it’s the premiere Java community conference in Germany, where Java developers from around the globe come together. Powered by the Java community and organized by the JAVAPRO Magazin in collaboration with Java User Group Oberpfalz, JCON EUROPE is where brilliant minds come together to learn, network, and have a blast. And this year, with 30 years of Java and the 10th edition of JCON to celebrate, it’s going to be the biggest, most unforgettable edition yet.