In Java 8, you can use a method reference to filter a stream, for example:
Stream<String> s = ...;
long emptyStrings = s.filter(String::isEmpty).count();
Is there a way to create a method reference that is the negation of an existing one, i.e. something like:
long nonEmptyStrings = s.filter(not(String::isEmpty)).count();
I could create the not method like below but I was wondering if the JDK offered something similar.
static <T> Predicate<T> not(Predicate<T> p) { return o -> !p.test(o); }
