OptionalLong getAsLong() method in Java with examples

OptionalLong help us to create an object which may or may not contain a long value. The getAsLong() method returns value If a value is present in OptionalLong object, otherwise throws NoSuchElementException.

Syntax:

public long getAsLong()

Parameters: This method accepts nothing. 

Return value: This method returns the value described by this OptionalLong. 

Exception: This method throws NoSuchElementException if no value is present Below programs illustrate getAsLong() method: 

Program 1:

Java

// Java program to demonstrate
// OptionalLong.getAsLong() method

import java.util.OptionalLong;

public class GFG {

    public static void main(String[] args)
    {

        // Create an OptionalLong instance
        OptionalLong opLong = OptionalLong.of(445325);

        System.out.println("OptionalLong: "
                           + opLong.toString());

        // Get value in this instance
        // using getAsLong()
        System.out.println("Value in OptionalLong = "
                           + opLong.getAsLong());
    }
}

Output:

OptionalLong: OptionalLong[445325]
Value in OptionalLong = 445325

Program 2:

Java

// Java program to demonstrate
// OptionalLong.getAsLong() method

import java.util.OptionalLong;

public class GFG {

    public static void main(String[] args)
    {

        try {

            // Create an OptionalLong instance
            OptionalLong opLong = OptionalLong.empty();

            System.out.println("OptionalLong: "
                               + opLong.toString());

            // Get value in this instance
            // using getAsLong()
            System.out.println("Value in OptionalLong = "
                               + opLong.getAsLong());
        }
        catch (Exception e) {

            System.out.println("Exception: " + e);
        }
    }
}

Output:

OptionalLong: OptionalLong.empty
Exception: java.util.NoSuchElementException: No value present

Example:

Java

import java.io.*;
import java.util.OptionalLong;

public class GFG {
    public static void main(String[] args)
    {
        OptionalLong optionalLong
            = OptionalLong.of(123456789L);
        long longValue = optionalLong.getAsLong();
        System.out.println("The Long value: " + longValue);
    }
}

Output

The Long value: 123456789