Method main

streams/StreamOfOptionals.java:9–19

(String[] args)

public class StreamOfOptionals {
  public static void main(String[] args) {
    Signal.stream()
      .limit(10)
      .forEach(System.out::println);
    System.out.println(" ---");
    Signal.stream()
      .limit(10)
      .filter(Optional::isPresent)
      .map(Optional::get)
      .forEach(System.out::println);
  }
}
/* Output:
Optional[Signal(dash)]