Java 8 lambda create list of Strings from list of objects

Question

I have the following qustion:

How can I convert the following code snipped to Java 8 lambda style?

List tmpAdresses = new ArrayList

        

Answer 1

You need to collect your stream into a List:

List adresses = users.stream()
    .map(User::getAdress)
    .collect(Collectors.toList());

For more information on the different Collectors visit the documentation

User::getAdress is just another form of writing (User user) -> user.getAdress() which could aswell be written as user -> user.getAdress() (because the type User will be inferred by the compiler)