LangChain4j Skip to main content LangChain4jIntroductionGet StartedTutorialsIntegrationsUseful MaterialsExamplesDocu chatbotJavadoc GitHubTwitterDiscord LangChain4j Supercharge your Java application with the power of LLMs Introduction Easy interaction with LLMs and Vector Stores All major commercial and open-source LLMs and Vector Stores are easily accessible through a unified API, enabling you to build chatbots, assistants and more. Tailored for Java Smooth integration into your Java applications is made possible thanks to Quarkus, Spring Boot and Helidon integrations. There is two-way integration between LLMs and Java: you can call LLMs from Java and allow LLMs to call your Java code in return. Agents, Tools, RAG Our extensive toolbox provides a wide range of tools for common LLM operations, from low-level prompt templating, chat memory management, and output parsing, to high-level patterns like Agents and RAG. Docs Introduction Get Started Tutorials Integrations Useful Materials Examples Documentation chatbot (experimental) Javadoc Community GitHub Twitter Discord Stack Overflow LangChain4j Documentation 2026. Built with Docusaurus.