Java新特性解读JDK8之函数式接口BiFunction

package java.util.function;


import java.util.Objects;


/**
 * Represents a function that accepts two arguments and produces a result.
 * This is the two-arity specialization of {@link Function}.
 *
 * <p>This is a <a href="package-summary.html">functional interface</a>
 * whose functional method is {@link #apply(Object, Object)}.
 *
 * @param <T> the type of the first argument to the function
 * @param <U> the type of the second argument to the function
 * @param <R> the type of the result of the function
 *
 * @see Function
 * @since 1.8
 */
@FunctionalInterface
public interface BiFunction<T, U, R> {


    /**
     * Applies this function to the given arguments.
     *
     * @param t the first function argument
     * @param u the second function argument
     * @return the function result
     */
    R apply(T t, U u);
    }

package com.example.functionalinterfacedemo;


import java.util.function.BiFunction;
/**
 * BiFunction 使用例子
 * @author thehe
 *
 */
public class BiFunctionDemo {


  public static void main(String[] args) {
    System.out.println(test(1,2,(x,y)->x+y));
    System.out.println(test(1,2,(x,y)->x-y));
    System.out.println(test(1,2,(x,y)->x*y));
    System.out.println(test(1,2,(x,y)->x/y));
  }
  public static Integer test(Integer integer,Integer integer2,BiFunction<Integer, Integer, Integer> biFunction){
    return biFunction.apply(integer, integer2);
  }


}