I've been writing Java since 1997 and have never heard of a "savitvchIn"
class. What is it and where can I find the API describing this class online?
Also, can you clarify the notation "ints above 40:x" and "ints below 40:y":
I've never seen that notation before and I don't know what 'x' and 'y' mean
in those contexts.

Also, if this is a school assignment, our policy here is that we will not
give detailed responses to a post that simply states the problem. We are
here to help you learn Java, not to do your homework for you. If you clarify
the question and then show us your best guess for the solution, we will help
you.

That means that you need to write as much of the solution as you can and
post it here. If you can't get your program to compile and have a question
about how to resolve the compile errors, that's fine: post your code and
tell us the exact errors you are getting from the compile.

If the program compiles but doesn't do the right things, that's also fine:
post your code and describe what it is doing and how that differs from what
you want it to do.

But if we don't see you making a significant effort to solve your own
problem, don't expect much help.

Rhino

see http://mindprod.com/jgloss/homework.html