Have you used Stream API for data collection processing?

Yes, I have used the Stream API for processing collections in Java. The Stream API allows writing concise and readable code for filtering, transforming, and aggregating data. For example, to get a list of user names over 18 years old:

List<User> users = ...;
List<String> adultNames = users.stream()
    .filter(user -> user.getAge() > 18)
    .map(User::getName)
    .collect(Collectors.toList());

This approach simplifies working with collections and improves code readability.