JAVA8: Map list of objects to String[]

Question

I have a List of 'Client' objects each one with a field "email".

I need something like:

List<String> listEmails = clients.stream().map(client->client.getEmail())
                                               .collect(Collectors.toList());

...but returning directly a String[].

Is there a proper way to map a List<Client> to a String[] listEmails using Java 8 streams?

I would like to obtain the String[] directly if it is possible — DavidPi, Oct 13 '17 at 11:17

score 1 · Accepted Answer · answered Oct 13 '17 at 11:18

1

Sure :

String[] result = clients
  .stream()
  .map(client->client.getEmail())
  .toArray(String[]::new)

answered Oct 13 '17 at 11:18

Arnaud Denoyelle

29,980
16
92
148

Thanks for the clean and concise answer! I didn't know about the .toArray(String[]::new) trick. – DavidPi Oct 13 '17 at 11:32

JAVA8: Map list of objects to String[]

1 Answers1