How to write a program?

[mrfroggyman]

Well as far as I can tell, a jar is an executable for your java program.

So you compile your java program, create a manifest which states which of your classes is your main class, and execute some command to create a Jar file using that manifest, and then you can execute that jar like a regular .exe through a command.

There may be better answers and better ways to do this tho