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QuickStart

Hello World

  • Make sure you have java and maven installed
java --version
mvn --version
  • Make sure you have an openAI account.

Specify your key as the environment variable OPENAI_API_KEY

export OPENAI_API_KEY=sk-...
  • Implementation

Here is the simplest snippet of code. It ia direct integration with the OpenAI API. You can find more examples in the sample codes section.

import dev.langchain4j.data.message.AiMessage;
import dev.langchain4j.model.chat.ChatLanguageModel;
import dev.langchain4j.model.openai.OpenAiChatModel;

public class HelloWorldExample {

    public static void main(String[] args) {

        // Create an instance of a model
        ChatLanguageModel model = OpenAiChatModel
                .withApiKey(System.getenv("OPENAI_API_KEY");

        // Start interacting
        AiMessage answer = model.sendUserMessage("Hello world!");

        System.out.println(answer.text()); // Hello! How can I assist you today?
    }
}
Last update: 2023-08-31