How do I use mapping in Java Streams?

Can you explain how to use mapping in Java Streams?

Sure! In Java Streams, mapping is used to transform elements in a stream. You can use the map method to apply a function to each element.

Can you give me an example of using the map function?

Absolutely! For instance, if you have a list of integers and you want to square each number, you can do it like this: List<Integer> squares = numbers.stream().map(n -> n * n).collect(Collectors.toList());

What if I want to convert a list of strings to their lengths?

You can do that too! Just use map to convert each string to its length: List<Integer> lengths = strings.stream().map(String::length).collect(Collectors.toList());

Are there any other mapping methods I should know about?

Yes! Besides map, you can also use flatMap for flattening nested structures. It's useful when you have a stream of collections.