OptionalInt getAsInt() method in Java with examples

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

Syntax:

public int getAsInt()

Parameters: This method accepts nothing.

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

Exception: This method throws NoSuchElementException if no value is present

Below programs illustrate getAsInt() method:

Program 1:

// Java program to demonstrate
// OptionalInt.getAsInt() method

import java.util.OptionalInt;

public class GFG {

    public static void main(String[] args)
    {

        // Create an OptionalInt instance
        OptionalInt opInt = OptionalInt.of(45);

        System.out.println("OptionalInt: "
                           + opInt.toString());

        // Get value in this instance
        // using getAsInt()
        System.out.println("Value in OptionalInt = "
                           + opInt.getAsInt());
    }
}

Output:

OptionalInt: OptionalInt[45]
Value in OptionalInt = 45

Program 2:

// Java program to demonstrate
// OptionalInt.getAsInt() method

import java.util.OptionalInt;

public class GFG {

    public static void main(String[] args)
    {

        try {

            // Create an OptionalInt instance
            OptionalInt opInt = OptionalInt.empty();

            System.out.println("OptionalInt: "
                               + opInt.toString());

            // Get value in this instance
            // using getAsInt()
            System.out.println("Value in OptionalInt = "
                               + opInt.getAsInt());
        }
        catch (Exception e) {

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

Output:

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

References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalInt.html#getAsInt()