Use of Java 8 Lambdas with Generics

Question

Is it possible to do this using Predicate interface.

I have a client class that utilizes functions provided by a MathUtility class. Whatever the Mathmatical operation it

Answer 1

The answer is yes, that should be possible. The you defined is not known to have the method "sum", therefore the compiler complains. Try to define

public interace SumInterface {
   public int sum(int a, int b);
}

(I haven't tried this code in IDE but this should do the trick)