Java how to get a reference to an object that exposes `Math`'s static methods?

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65924699/java-how-to-get-a-reference-to-an-object-that-exposes-maths-static-methods

Answer 1

You can't. It can't be instantiated. But you can pass method references or lambdas of it's methods (although this example is somewhat contrived and not of much use).

double dmax = getMaximum(Math::max, 20., 40.);
int imax = getMaximum(Math::max, 14, 80);

System.out.println(dmax);
System.out.println(imax);

Prints

40.0
80

The method

public static <T> T getMaximum(BinaryOperator<T> op, T a, T b) {
        return op.apply(a,b);
}