It seems like you're looking for a Java client library to interact with the OpenAPI Specification (v2). The @openapitools/openapi-generator-cli package provides a way to generate various API clients, including Java.

To download the Java client library for v2 API, you can use the following command:

openapi-generator generate -i path/to/openapi-specification.yaml -g java -o output-path

This will generate the necessary Java code for interacting with your OpenAPI Specification. You can then compile and run this code to interact with your API.

Note that you'll need to replace path/to/openapi-specification.yaml with the actual path to your OpenAPI Specification file, and output-path with the desired location for the generated Java code.

If you're looking for a specific feature like product recipes or vector PNGs, it's not clear how this would be related to the Java client library. Could you provide more context or clarify what you're trying to achieve?