A self-hosted web UI that simplifies AI experimentation and testing for Java developers. It provides playgrounds for all major vector databases and MCP tools, supports intuitive interaction with LLMs, and enables rapid development and testing of RAG workflows, MCP integrations, and unified chat experiences.

SHACL validation UI, SHACL documentation generator, UML diagram generator from SHACL, SHACL generator from RDF.

This project is a booking system for football playgrounds. It serves the players and playground owners as well as an administrator who oversees the overall operations of the system. The project is developed as part of a software engineering course.

It is GraphQL boilerplate project developed on Java Spring Boot. PostgreSQL used as a database on Docker

🎮 JavaFX example app with use of simple JDBC abstraction.

EasyWorkflow is a LangChain4j extension that provides a DSL for workflow design, along with a debugger and playground for easier testing and results visualization

This is a playground project to learn and compare different JVM reactive stacks

A small Java application for playing with SQL injection vulnerabilities on a local in-memory H2 database.

Dr. Spring Playground

2D Game Development by Java.

Geometry Playground is a free ruler and compass Java application for seven geometries. Geometry Playground has been translated into 10 languages.

Learn about changes in Java by example. Repository contains unit tests of Java features to help stay up to date with recent changes in the language. ☕️ 🎯

Playground for Brainfuck interpreters in Java. Come in different flavours.

Android Playground

⚡ vʌvr in action playground

Swing (Java) Practicing.

This is a playground project to learn some previously unused technologies by me

Java Practicing.

A reference implementation of GraphQL for Spring boot

My Java snippets and best practices, including some usages which are easily confused.