Java.util.function.LongBinaryOperator interface with Examples

The LongBinaryOperator interface was introduced in Java 8. It represents an operation on two long values and returns the result as a long value. It is a functional interface and thus can be used as a lambda expression or in a method reference. It is mostly used when the operation needs to be encapsulated from the user.

Methods:

1. applyAsLong(): This function takes two long values, performs the required operation and returns the result as a long.

   public long applyAsLong(long val1, long val2)
   

Example to demonstrate LongBinaryOperator interface as a lambda expression .

// Java program to demonstrate LongBinaryOperator

import java.util.function.LongBinaryOperator;

public class LongBinaryOperatorDemo {
    public static void main(String[] args)
    {

        LongBinaryOperator longBinaryOperator = (x, y) ->
        {
            return x + y;
        };

        System.out.print("343666 + 547477 = ");
        System.out.println(longBinaryOperator
                               .applyAsLong(343666, 547477));

        LongBinaryOperator longBinaryOperator1 = (x, y) ->
        {
            return x * y;
        };
        System.out.print("343666 * 547477 = ");
        System.out.println(longBinaryOperator1
                               .applyAsLong(343666, 547477));
    }
}

Output:

343666 + 547477 = 891143
343666 * 547477 = 188149230682

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/function/LongBinaryOperator.html