As we expand GitNex from just an app, we have now a Java SDK for Gitea APIs, which anyone can use in their Java app.
Feel free to use, send PR to enhance.
https://codeberg.org/gitnex/tea4j
We also have forked java emoji library to add new emoji rendering.
https://codeberg.org/gitnex-garage/emoji-java
Thanks to the GitNex team for taking time to do this. 👍