Java 8 feature: Java optional

Java optional

import java.util.Optional;

public class OptionalDemo {

public static void main(String[] args) {

// creating Optional object from a String

Optional<String> GOT = Optional.of("Game of Thrones");

// creating empty Optional object

Optional<String> nothing = Optional.empty();

System.out.println(GOT.orElse("default value"));

System.out.println(nothing.orElse("default value"));

String anotherGOT = Optional.ofNullable("Game of throne").orElse("default value");

System.out.println(anotherGOT);

}

}

Output:

Game of Throne

default value

Game of throne

References:

1. Java optional example

2.Java 8 features and optional

3. Java optional more example