How to compile executable from github?

Question

Java

Can you please tell the teapot how to compile executable files from github?
I downloaded the archive with the files, but what to do next with it is not clear. Sometimes it happens that there are already ready-made applications, and sometimes not.

Answer 1

And sometimes in the turnip itself in readme.md there is a description of how to compile.
And to understand how to compile something - you need to see something. Because otherwise the answer will be like about the Mexicans - "how to compile? with a compiler."

Answer 2

Download Android Studio, import this project there, build the project.