In Java 8, transform Optional of an empty String in Optional.empty

Question

Given a String I need to get an Optional, whereby if the String is null or empty the result would be Optional.empty. I can do it this way:

String ppo = \"\";
Opt         


        

Answer 1

You can use map :

String ppo="";
Optional ostr = Optional.ofNullable(ppo)
                                .map(s -> s.isEmpty()?null:s);
System.out.println(ostr.isPresent()); // prints false