What are some examples of using the Java Streams API?

Can you give me some examples of how to use the Java Streams API?

Sure! The Java Streams API allows you to process sequences of elements, such as collections, in a functional style. For example, you can filter a list of integers to get only the even numbers.

That sounds interesting! Can you show me the code for filtering even numbers?

Absolutely! Here's a simple example:

List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6);
List<Integer> evenNumbers = numbers.stream()
    .filter(n -> n % 2 == 0)
    .collect(Collectors.toList());
System.out.println(evenNumbers);

This will output: [2, 4, 6]

What about using the map function? Can you provide an example?

Of course! The map function transforms each element in the stream. For instance, if you want to square each number:

List<Integer> squaredNumbers = numbers.stream()
    .map(n -> n * n)
    .collect(Collectors.toList());
System.out.println(squaredNumbers);

This will output: [1, 4, 9, 16, 25, 36]