Hello Langchain4J

Sample project to start using the power of Langchain for Java!

Specially created for The Developer's Conference 2023 Future edition.

Requirements

• Java 17
• Maven 3
• OpenAI account

Usage

1. Create a copy of .env.example and rename to .env
2. Fill the .env file with the OpenAI API token and organization ID
3. Export .env file to make env vars available:

export $(cat .env | xargs)

4. Build the application from the source code:

./mvnw clean package

5. Use the following commands to run each example:

./mvnw exec:java -D'exec.mainClass=_00_Model'

./mvnw exec:java -D'exec.mainClass=_01_Prompt'

./mvnw exec:java -D'exec.mainClass=_02_Memory'

./mvnw exec:java -D'exec.mainClass=_03_Retrieval'

./mvnw exec:java -D'exec.mainClass=_04_Agents'

References

• langchain4j-examples
• Introduction to LangChain
• Java Meets AI: A Hands-On Guide to Building LLM-Powered Applications with LangChain4j