Spec j.u.f.Predicate doesn't specify NPEs thrown by the SE8's Reference Implementation

Specification for classes Predicate, BiPredicate, DoublePredicate, IntPredicate and LongPredicate says nothing about NPEs thrown by the RI for null args passed.

http://download.java.net/jdk8/docs/api/java/util/function/Predicate.html
http://download.java.net/jdk8/docs/api/java/util/function/LongPredicate.html
http://download.java.net/jdk8/docs/api/java/util/function/IntPredicate.html
http://download.java.net/jdk8/docs/api/java/util/function/DoublePredicate.html
http://download.java.net/jdk8/docs/api/java/util/function/BiPredicate.html

NPEs need to be specified.