How to set up GitHub for two projects with common logic?

Question

GitHub

There are two Java projects. One for Android, in Android Studio, the second in the idea, under JavaFX. Projects have a common part - logic, several classes, and there are gui classes, respectively, different. The projects are in different repositories. I would like the common part with the logic when updating on the github to be updated in both repositories at the same time. How to do it right?

Answer 1

Third repository for shared code
Use git submodule