Higher order Functions in Java

HigherOrderFunctions.java

import java.util.function.Function;

import static java.lang.String.format;

class HigherOrderFunctions {

    public static void main(String[] args) {

        Function<Integer, Integer> addOne = describeOperationFor(1);
        Function<Integer, Integer> multiplyOne = a -> a * 1;
        Function<Integer, Integer> subtractOne = a -> a - 1;
        Function<Integer, Integer> divideByOne = a -> a / 1;

        System.out.println(describeOperationFor3(addOne));
        System.out.println(describeOperationFor3(multiplyOne));
        System.out.println(describeOperationFor3(subtractOne));
        System.out.println(describeOperationFor3(divideByOne));
    }

    //a higher order function that takes a function
    private static String describeOperationFor3(Function<Integer, Integer> operation){
        final Integer value = 3;
        return format("Operation on 3 resulted to %s", operation.apply(3));
    }

    //a higher order function that returns a function
    private static Function<Integer, Integer> describeOperationFor(Integer addend){
        return a -> a + addend;
    }
}