Optional get Method

In this tutorial, we will demonstrate how to get a value from the Optional class object using the get() method.

Get Value from Optional Object in Java - get() Method

The get() method returns a value if it is present in this Optional otherwise throws NoSuchElementException.

In the below example, the get() method returns a value because the value is present in the Optional class object:

package com.java.lambda.optional;

import java.util.Optional;

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

        String email = "[email protected]";
        Optional<String> stringOptional = Optional.ofNullable(email);
        String value = stringOptional.get();
        System.out.println(value);
    }
}

Output:

[email protected]

In the below example, the get() method throws the NoSuchElementException because the value is not present in the Optional class object:

package com.java.lambda.optional;

import java.util.Optional;

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

        String email = null;
        Optional<String> stringOptional = Optional.ofNullable(email);
        String value = stringOptional.get();
        System.out.println(value);
    }
}

Output:

Exception in thread "main" java.util.NoSuchElementException: No value present
	at java.base/java.util.Optional.get(Optional.java:143)
	at com.java.lambda.optional.OptionalDemo.main(OptionalDemo.java:10)