Slice a string in groovy

I have a 18 character string I want characters 2-8 from. In python I can do this:

sliceMe = "nnYYYYYYnnnnnnnnnn"
print sliceMe[2:8]

prints

YYYYYY

I am looking for a way to do this same thing in groovy, and every explanation is REALLY long. Whats the elegant accepted way to do this in groovy (or java for that matter)?