REST API generated from the swagger.json spec at https://api.bitbucket.org/swagger.json
You may want to use App Passwords for authentication.
Note: swagger.yml is committed in the repo! Because some adjustments were needed to get code generation working. See commit log.
Note: JAX-RS is just an API! You will need an implementation to create a client. Example here. See: https://en.wikipedia.org/wiki/Java_API_for_RESTful_Web_Services