Optional isPresent Method

In this tutorial, we will demonstrate how to check a value is present in an Optional class object using the isPresent() method.

Optional isPresent() Method Example

The isPresent() method returns true if there is a value present, otherwise false.

In the below example, the isPresent() method returns true and prints the value:

import java.util.Optional;

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

        String email = "[email protected]";
        Optional<String> stringOptional = Optional.ofNullable(email);
        if(stringOptional.isPresent()){
            System.out.println(stringOptional.get());
        }else{
            System.out.println("no value present");
        }
    }
}

Output:

[email protected]

In the below example, the isPresent() method returns false and prints the message as "no value present":

import java.util.Optional;

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

        String email = null;
        Optional<String> stringOptional = Optional.ofNullable(email);
        if(stringOptional.isPresent()){
            System.out.println(stringOptional.get());
        }else{
            System.out.println("no value present");
        }
    }
}

Output:

no value present

Note that we used the isPresent() method to check if there is a value inside the Optional object.