LangChain4j is an open-source Java library that simplifies the integration of LLMs into Java applications through a unified API, providing access to popular LLMs and vector databases. It makes implementing RAG, tool calling (including support for MCP), and agents easy. LangChain4j integrates seamlessly with various enterprise Java frameworks.

Java version of LangChain, while empowering LLM for Big Data.

LangStream. Event-Driven Developer Platform for Building and Running LLM AI Apps. Powered by Kubernetes and Kafka.

🔥 Building composable LLM applications & workflow with Java.

Using Langchain's ideas to build SpringBoot AI applications | 用langchain的思想，构建SpringBoot AI应用

Free APaaS no-code platform combined with AI applications for rapid business app development. 免费APaaS零代码平台结合AI应用，助力企业快速搭建个性化业务应用，无需编码。敲敲云提供完整的应用搭建、表单、流程和仪表盘引擎，满足企业日常需求。

Quarkus Langchain4J Workshop

A Java 8+ LangChain implementation. Build powerful LLM based applications in an (enterprise) Java context.

JavaChain 用于快速搭建LLM应用，参考了 LangChain 的架构设计，基于Java8实现。

Java 23, SpringBoot 3.4.1 Examples using Deep Learning 4 Java & LangChain4J for Generative AI using ChatGPT LLM, RAG and other open source LLMs. Sentiment Analysis, Application Context based ChatBots. Custom Data Handling. LLMs - GPT 3.5 / 4o, Gemini Pro 1.5, Claude 3, Llama 3.1, Phi-3, Gemma 2, Falcon 3, Qwen 2.5, Mistral Nemo, Wizard Math

Integrates LLMs as PTransform in Apache Beam pipelines using LangChain

An AI application platform based on large language models and RAG technology. 一款基于大型语言模型和RAG技术的AI应用平台，支持快速创建图文并茂的AI知识库和智能聊天助手。界面简洁，提供知识库管理、流程编排、模型配置、向量库对接及实时监控，帮助用户轻松构建精准智能问答系统。

Build your own perplexity for your applications using research4j and integrate them for any domain specific usecases

Samples showing how to build Java applications powered by Generative AI and LLMs using LangChain4j and Spring Boot.

Dynamic Retrieval Augmented Generation for Optimized Nimble

InCoder is a powerful plugin designed for JetBrains IDEs, including IntelliJ IDEA, PyCharm, and others in the JetBrains ecosystem. It seamlessly integrates advanced Large Language Models (LLMs) into your development workflow, providing you with code generation, understanding, and completion capabilities, all directly within your favorite IDE.

LangChain Expression Language (LCEL) As NiFi Processors

A Java implementation of the A2A protocol, that's agent to agent scenarios with google a2a protocol

Learn how to build AI-infused applications with Quarkus

UltraCodeAI is an innovative AI-powered IntelliJ plugin that transforms coding with seamless assistance. It supports local/cloud LLMs like Ollama, OpenAI, and Groq for context-aware prompts, auto code error analysis, and RAG-enhanced insights. Features includes tabbed UI for chat, diagnostics, and recommendations; hover explanations; design pattern