When I add a folder called "interface" in my Scala project in IntelliJ IDEA,
there is a error: "Not a valid package name".
Why is this and is this possible to change?
>Solution :
You can’t use reserved keywords.
see the list of reserved keywords:
https://docs.oracle.com/javase/specs/jls/se7/html/jls-3.html#jls-3.9