import java.util.Optional; public class Main { public static void main(String[] args) { Optional<String> name = Optional.of("Liam"); Optional<String> noName = Optional.empty(); System.out.println(name.map(n -> n.toUpperCase()).orElse("Guest")); System.out.println(noName.map(n -> n.toUpperCase()).orElse("Guest")); } }