About Question enthuware.ocpjp.v8.2.1793 :

[javalass]

Code: Select all

ls.stream().reduce((a, b) -> a > b ? a : b);

This is actually a valid lambda expression that implements Comparator (...)

It doesn't implement Comparator, it performs a reduction using a BinaryOperator<Integer>.

[admin]

Fixed.
thank you for your feedback!
Paul.