Error received when running test code and assistance for setting up the library

[tomstorm]

Hi there,

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

This shows up just before the printing of 'Hello World!', is this normal? I downloaded the 2.1.1 jar affinity and enclosed it in my program.
Also if you can, could you expand on how you assign a thread to a core?
Thanks very much
TS