Johannes Rabauer
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rabauer.bsky.social
Johannes Rabauer
@rabauer.bsky.social
71 followers 160 following 150 posts
☕ Java coder @xdev.software | 🤖 AI wrangler | 🎤 Conference speaker | 🎮 Full-time dad, part-time gamer
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rabauer.bsky.social
Caution: German content incoming!

Join me on 12. Nov. at 18:00 in #Weiden with the #JUG #Oberpfalz

rabauer.dev/meetup

#Java #AI #Meetup #SpringAI #LangChain4J #DeveloperCommunity #CodingEvent
November 8, 2025 at 6:46 PM
rabauer.bsky.social
Favorite input field 😅
October 7, 2025 at 9:16 AM
rabauer.bsky.social
After building an AI storytelling app for fun…
…it’s time to create something actually useful. 🚀

Meet Quanta – an AI file searcher.
September 29, 2025 at 7:15 AM
rabauer.bsky.social
Just unlocked a new achievement: 🏆 Oracle ACE Associate!
Big thanks to the Oracle community 🙌
Catch me dropping Java wisdom at JCON or on YouTube 😂
#OracleACE #Java #DevCommunity @oracleace.bsky.social
A smiling man wearing glasses, a black t-shirt, and a lanyard points to an Oracle ACE Associate certificate. The certificate is awarded to Johannes Rabauer in recognition of technical and community leadership contributions to Oracle communities from July 2024 to August 2025. It is signed by Gerald Venzl, VP of Database Product Management, ACE Program, and dated September 2025. In the background, there is an illustration of a golden trophy with a spade symbol.
September 23, 2025 at 8:07 AM
rabauer.bsky.social
☕ Java’s AI ecosystem has grown up.
What felt clunky a year ago is now slick. With tools like Spring AI and LangChain4j, building AI in Java is no longer experimental—it’s production-ready. #JavaDev #AI
August 21, 2025 at 7:06 AM
rabauer.bsky.social
💾 Local models > cloud (sometimes).
Spun up Llama 3 via Ollama on my laptop—private, fast, $0 API bill. Turns out, sometimes “AI in the cloud” = “AI in my living room.” #Ollama #Llama3 #OnPremAI
August 21, 2025 at 7:06 AM
rabauer.bsky.social
🧠 Memory is everything.
No memory = total Dory mode.
With it = conversational coherence.
Thanks, LangChain4j and SpringAI, for not letting my AI go full “What was I doing again?” 🐠 #LLM #SpringAI
August 21, 2025 at 7:06 AM
rabauer.bsky.social
🌳 Java devs: ever feel like AI in Java is a wild forest?
Guess what—tools are finally landing: meet the Java AI toolbox with @spring-ai.bsky.social & @langchain4j.dev Ready to wield? Let’s go! #JavaAI #SpringBoot #LangChain4j
August 21, 2025 at 7:06 AM
rabauer.bsky.social
Part 7 of our AI game development series is live — more about exploring ideas together than ticking off a checklist.

#AI #GameDev #LLM #JavaDev
Comic-style illustration in the vibrant, exaggerated style of *Asterix & Obelix*, showing a bearded man with short hair and round glasses (based on the provided photo) in Roman-era tunic and sandals, charging forward with a clenched fist toward a towering glowing blue cyberpunk robot. The robot has holographic armor, neon circuitry, and emits a bright blue light. The scene takes place in a large Roman arena with sandy ground and tall stone walls, packed with a cheering crowd holding humorous banners that read “Make a custom model!” and “Limit the tokens!” Motion lines, dust clouds, and expressive poses emphasize the action, with warm daylight contrasting against the robot’s neon glow.
August 14, 2025 at 2:10 PM
rabauer.bsky.social
🧠 Thinking LLMs are cool… until they start thinking too much.
Just wrapped up another live coding session in #LangChain4J testing thinking-enabled models.
Here’s what happened 👇
#Java #LLM #AItools #GenerativeAI
A bearded man with glasses sits at a rustic wooden table in a warmly lit log cabin, his flat hand hovering over a large red “STOP THINKING” button connected by a thick cable to a plush brown bear labeled “qwen3.” The bear’s eyes glow bright blue like a robot, and above its head floats a holographic busy indicator. A thought bubble with three dots hovers over the man’s head as he focuses intently on the bear.
August 11, 2025 at 8:45 AM
rabauer.bsky.social
The latest live coding session was... something else.

AI logic, function calls, broken ASCII art.

🎥 Catch the next session here: youtube.com/live/jbnWaC0...

#LiveCoding #Java #AI #OpenSource
August 6, 2025 at 3:18 PM
rabauer.bsky.social
Just finished a live coding session playing with AI coding assistants and trying to swap @spring-ai.bsky.social with @langchain4j.dev in a Java project.
Here's what I learned 🧵👇
A digital illustration showing a three-part progression: on the left, a man with glasses types intently on a keyboard in a dark, sci-fi environment with glowing code behind him; in the center, a futuristic AI robot with glowing blue eyes monitors a laptop; and on the right, a hooded Dungeon Master with glowing eyes stands over a fantasy map and a floating D20 die, with a speech bubble saying, “Prepare to enter the dungeon...” Blue glowing arrows connect each element from left to right, visually representing the flow from human coder to AI to fantasy game master.
August 3, 2025 at 11:00 PM
rabauer.bsky.social
Next time I’ll come prepared with a new image strategy and a tighter focus.
Until then: thanks to everyone who dropped by!

📺 Replay if you missed it:
www.youtube.com/live/lGACZWU...

#Java #LiveCoding #StableDiffusion #RTX3060 #GameDev #GenerativeAI #DevStreaming #Spring #Vaadin
July 28, 2025 at 6:30 AM
rabauer.bsky.social
🧵 Live Coding Session #4 – Saturday 20:00!

I’ve been promising AI-generated ASCII art in my game for a while now.
It’s finally happening on saturday.
…but there's a catch.
July 25, 2025 at 6:30 AM
rabauer.bsky.social
Why use Java for an AI game?
✅ Full control
✅ Local-first (Ollama)
✅ Spring + Vaadin = powerful combo
Join me Saturday as we push function calling and LLMs to create real game logic.
#SpringBoot #JavaDev #Ollama #Vaadin
July 18, 2025 at 7:26 AM
rabauer.bsky.social
🎥 Tried making a promo video for my live-coding stream on YouTube (youtube.com/live/fww6351... 🤓) using #GoogleAI's #Veo2 — but honestly, it didn’t quite meet expectations.

Check it out and let me know your thoughts. How could i improve this? 👀

#AI #LiveCoding #GenAI
July 17, 2025 at 3:01 PM
rabauer.bsky.social
What story twists should happen in an AI-driven text adventure?
🧙 A cursed sword?
🐉 A talking tree?
🐺 Betrayal from your pet wolf?
Drop your wildest game ideas – they might end up in Saturday’s build!
#GameDesign #IndieDev #LLM #Storytelling
July 17, 2025 at 11:02 AM
rabauer.bsky.social
We're finally bringing ASCII art to life on Saturday's stream!
Think retro-style scenes, fully generated by the AI.
Fantasy + LLMs + Java.
Any ideas for scenes you'd love to see in ASCII?
#AsciiArt #TextGame #LLM #AIinJava
July 16, 2025 at 9:23 PM
rabauer.bsky.social
This week on stream:
Using @SpringAI function calling to update health, mana, and inventory in-game!
All local, with Ollama + Java.
Ever implemented RPG mechanics using LLMs?
#JavaDeveloper #AI #Ollama #GameDev
July 15, 2025 at 2:22 PM
rabauer.bsky.social
Part 3 of my local AI-powered text RPG in Java is coming this Saturday!
We’re adding:
- Function calling for HP/Mana/Inventory
- ASCII art
- Win/lose conditions
Got ideas for cool story turns or wild items? Hit me 👇
#Java #SpringAI #Vaadin #LiveCoding
July 14, 2025 at 8:01 PM
rabauer.bsky.social
Join if you:
✅ Like AI projects in Java
✅ Want to see Vaadin in action
✅ Love watching devs struggle with layouts 😅
✅ Miss old-school text games with a twist
Today! 8 PM CEST. Let’s build!
#LiveCoding #DevStreamer #Java
July 12, 2025 at 2:22 PM
rabauer.bsky.social
Part 2 is where the story really begins.
Less wiring, more game.
Let’s see what kind of weird prompts and ASCII scenes we can build with Java + AI.
See you live this Saturday!
#JavaDeveloper #SpringAI #VaadinUI #Ollama
July 11, 2025 at 8:03 AM
rabauer.bsky.social
Java devs:
How would you design a UI for a chat-driven RPG with spells, stats, inventory, and AI responses?
Minimalist? Tabs? Retro terminal look?
Drop your ideas ⬇️
#GameUI #JavaDev #IndieDev #AIUX
July 10, 2025 at 3:07 PM
rabauer.bsky.social
🧩 This week’s mission:
- Make Vaadin layouts not ugly
- Add first dynamic story choices
- Start ASCII art generation (🤖🎨)

Think text-based AI-powered Skyrim, but nerdier.
#Vaadin #AIinJava #LLM #AsciiArt
July 9, 2025 at 2:14 AM
rabauer.bsky.social
🚨 Part 2 of my AI chat game in Java is coming this Saturday!
We’ve got #SpringAI + #Ollama running.
Now it’s time to design a usable UI with Vaadin… and maybe start real game prompts!
#Java #Vaadin #LiveCoding #AI
July 8, 2025 at 11:13 AM