package com.zetcode; import java.util.function.BiFunction; public class BiFunctionEx { public static void main(String[] args) { // Integer::sum BiFunction addFun = (x, y) -> x + y; var ret = addFun.apply(10, 20); System.out.println(ret); BiFunction subFun = (x, y) -> x - y; var ret2 = subFun.apply(10, 20); System.out.println(ret2); } }