Message12406

It would be nice in Java 8 onward if Python functions could be used where functional interfaces specified by lambdas (or method refs) can be used in Java.

Examples would be in streams e.g.

    filtered_list = al.stream().filter(moreThanThree).collect(toList())

See attached example for full code.

This fails at them moment because although Predicate is a @FunctionalInterface it also declares default methods. which results in it not being coerced in PyFunction.__tojava__(Class<?>)

Probably for after 2.7.1 it might be easier to implement when default methods can be introspected via reflection.