@Test
public void OptionalIfElse() {
	String cat = new String("Cat without a tail");
	String dog = null;

	Optional.ofNullable(cat).ifPresentOrElse(c -> System.out.println(cat), () -> System.out.println("No cat."));
	Optional.ofNullable(dog).ifPresentOrElse(c -> System.out.println(dog), () -> System.out.println("No dog."));
}