[dandevs]

If you want to generate a Java client for testing, you can use Fern to generate one: https://github.com/fern-api/fern-java

disclaimer: I'm a maintainer of Fern.

[onenashev]

Yeah, there are many projects for client generation from OpenAPI, and the number keeps growing. Make sure to add your tool to https://tools.openapis.org/ !