🚀 go-pugleaf

I'm trying to create a simple int variable that I can use as an index in
a loop.  How do I declare it?  When i try the obvious (int my_int = new
int();) I get an error saying that "class required but int found."  When
I try running the loop without declaring the index, it tells me that
my_int not found in class my_class.

And when I doing the whole thing with Integers, I can't figure out how
to add anything(!)--I get errors saying that the method
+(java.lang.Integer, java.lang.Integer) not found in class my_class.

What's going on here?  How can I resolve this?  Thanks!