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package com.home;

import java.util.*;

import java.util.function.BiFunction;

import java.util.function.Function;

import java.util.stream.Collectors;

public class javaBiFunction {

public static void main(String[] args) {

// takes two Integers and return an Integer

BiFunction<Integer, Integer, Integer> func = (x1, x2) -> x1 + x2;

Integer result = func.apply(2, 3);

System.out.println(result); // 5

// take two Integers and return an Double

BiFunction<Integer, Integer, Double> func2 = (x1, x2) -> Math.pow(x1, x2);

Double result2 = func2.apply(2, 4);

System.out.println(result2); // 16.0

// take two Integers and return a List<Integer>

BiFunction<Integer, Integer, List<Integer>> func3 = (x1, x2) -> Arrays.asList(x1 + x2);

List<Integer> result3 = func3.apply(2, 3);

System.out.println(result3);

// Math.pow(a1, a2) returns Double

BiFunction<Integer, Integer, Double> func1 = (a1, a2) -> Math.pow(a1, a2);

// takes Double, returns String

Function<Double, String> func2s = (input) -> "Result : " + String.valueOf(input);

String results = func1.andThen(func2s).apply(2, 4);

System.out.println(results);

}