Java LongBinaryOperator

Introduction

In Java, the LongBinaryOperator interface is a functional interface that represents an operation upon two long-valued operands, producing a long result. It is part of the java.util.function package and is commonly used for arithmetic operations involving two long values.

Table of Contents

1. What is LongBinaryOperator?
2. Methods and Syntax
3. Examples of LongBinaryOperator
4. Real-World Use Case
5. Conclusion

1. What is LongBinaryOperator?

LongBinaryOperator is a functional interface that takes two long operands and returns a long result. It is useful for scenarios where operations on two long values are required.

2. Methods and Syntax

The main method in the LongBinaryOperator interface is:

• long applyAsLong(long left, long right): Applies the operator to the given operands and returns the result.

Syntax

LongBinaryOperator operator = (long left, long right) -> {
    // operation on left and right
    return result;
};

3. Examples of LongBinaryOperator

Example 1: Adding Two Long Values

import java.util.function.LongBinaryOperator;

public class AdditionExample {
    public static void main(String[] args) {
        // Define a LongBinaryOperator that adds two long values
        LongBinaryOperator add = (a, b) -> a + b;

        long result = add.applyAsLong(5L, 3L);
        System.out.println("Sum: " + result);
    }
}

Output:

Sum: 8

Example 2: Multiplying Two Long Values

import java.util.function.LongBinaryOperator;

public class MultiplicationExample {
    public static void main(String[] args) {
        // Define a LongBinaryOperator that multiplies two long values
        LongBinaryOperator multiply = (a, b) -> a * b;

        long result = multiply.applyAsLong(4L, 2L);
        System.out.println("Product: " + result);
    }
}

Output:

Product: 8

4. Real-World Use Case: Calculating the Maximum of Two Long Values

In applications, LongBinaryOperator can be used to determine the maximum of two long values, such as comparing file sizes.

import java.util.function.LongBinaryOperator;

public class MaxExample {
    public static void main(String[] args) {
        // Define a LongBinaryOperator to find the maximum of two long values
        LongBinaryOperator max = (a, b) -> a > b ? a : b;

        long result = max.applyAsLong(10L, 20L);
        System.out.println("Maximum: " + result);
    }
}

Output:

Maximum: 20

Conclusion

The LongBinaryOperator interface is used in Java for performing operations on two long operands. It is particularly beneficial in mathematical calculations and data processing. Using LongBinaryOperator can lead to cleaner and more efficient code, especially in functional programming contexts.