In this source code example, we will demonstrate how to get the default value using the Optional orElse() method with an example.
The orElse() method returns the value if present, otherwise return other (default value).
Java Optional orElse() Method Example
In the below example, orElse() method return default value because Optional contains null value:
import java.util.Optional;
public class OptionalDemo {
public static void main(String[] args) {
String email = null;
Optional<String> stringOptional = Optional.ofNullable(email);
String defaultOptional = stringOptional.orElse("default@gmail.com");
System.out.println(defaultOptional);
}
}
Output:
default@gmail.com
In the below example, orElse() method return actual value because Optional contains actual value:
import java.util.Optional;
public class OptionalDemo {
public static void main(String[] args) {
String email = "ramesh@gmail.com";
Optional<String> stringOptional = Optional.ofNullable(email);
String defaultOptional = stringOptional.orElse("default@gmail.com");
System.out.println(defaultOptional);
}
}
Output:
ramesh@gmail.com
Related Optional Class Method Examples
- Create Optional Class Object in Java - empty(), of(), ofNullable() Methods
- Optional get() Method - Get Value from Optional Object in Java
- Optional isPresent() Method Example
- Optional orElse() Method Example
- Optional orElseGet() Method Example
- Optional orElseThrow() Method Example
- Optional filter() and map() Method Examples
Comments
Post a Comment