# Used Classes

We separate this classes in:

* [Body](https://docs.zapsign.com.br/english/facilitators/sdks/java-sdk/used-classes/body) - classes used to formulate the request body.
* [Response](https://docs.zapsign.com.br/english/facilitators/sdks/java-sdk/used-classes/response) - classes used to formulate request responses.