Variable is already defined in method lambda

Question

Consider the following almost compilable Java 8 code:

public static void main(String[] args) {

    LinkedList users = null;
    users.a         


        

Answer 1

look at the code

User user = users.stream().filter((user) -> user.getId() == 1).findAny().get();

The variable name is user and the variable inside the lambda is also user

try changing it to be something like this

User user = users.stream().filter((otherUser) -> otherUser.getId() == 1).findAny().get();