How to create a jar archive in Idea?

Question

Java

I need to create a class archive with two methods. When trying to create an archive via Project Structure → Artifacts, Idea creates an archive with a modified class: an empty constructor is created, foreach loops are replaced with iterators. How to create an archive without changing the original class?

Answer 1

No way. And Idea has nothing to do with it. This is the work of the Java compiler, and is fixed by the standard of the language and the virtual machine.

Answer 2

The jar stores the code already compiled into .class files.
And things like foreach, lambda... are called syntactic sugar, created for ease of writing, but in . Class java parses them.
For example lambda would be a nested class