JAVA8: Map list of objects to String[] [duplicate]

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
– DavidPi, Commented Oct 13, 2017 at 11:17

Arnaud Denoyelle · Accepted Answer · 2017-10-13 11:18:59Z

2

Sure :

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

answered Oct 13, 2017 at 11:18

Arnaud Denoyelle

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1 Comment

DavidPi Over a year ago

Thanks for the clean and concise answer! I didn't know about the .toArray(String[]::new) trick.

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