Google has updated its Agent Development Kit for Java to add integration with the LangChain4j LLM framework. This expands the range of large language models available to users of the development kit to all those supported by LangChain4j, which opens it up to all the large language models supported by the framework.
Google describes its Agent Development Kit, ADK, as a flexible and modular framework for developing and deploying AI agents. The kit is optimized to work with Gemini and the Google ecosystem, but is ADK is model-agnostic, deployment-agnostic, and built for compatibility with other frameworks.
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Google says ADK was designed to make agent development feel more like software development, to make it easier for developers to create, deploy, and orchestrate agentic architectures.
The updated release means that in addition to ADK's built-in Google Gemini and Anthropic Claude integrations, developers will be able to use LangChain4j to access other models from third-party providers such as OpenAI, Anthropic or GitHub, or local open-weight models by making use of Ollama or Docker Model Runner.
Alongside the LangChain4j support, the new version also extends way tools can be created and managed. For instance-based FunctionTools, developers can now use object instances to create them in addition to using static methods. Async support is improved, and FunctionTools now support methods that return a Single. This improves asynchronous operation support and makes agents more responsive. There's also better loop control via a new endInvocation field in Event Actions that means programs can interrupt or stop the loop after a tool call.
Agent logic and memory improvements start with the addition of support for chained callbacks for before/after events on model, agent, and tool execution. This enables more complex and fine-grained logic within an agent's lifecycle. The new version also adds an InMemoryMemoryService for simple, fast memory management and implements VertexAiRagRetrieval using AI Platform APIs for more advanced RAG patterns.
Other improvements include a parent POM and a Maven Wrapper.
Google Agent Development Kit for Java 0.2 is available now.
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More Information
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