Method main

streams/Optionals.java:40–46

(String[] args)

    cos.accept(Stream.<String>empty().findFirst());
  }
  public static void main(String[] args) {
    test("basics", Optionals::basics);
    test("ifPresent", Optionals::ifPresent);
    test("orElse", Optionals::orElse);
    test("orElseGet", Optionals::orElseGet);
    test("orElseThrow", Optionals::orElseThrow);
  }
}
/* Output:
 === basics ===