How do I use the Java Streams API effectively?

How do I use the Java Streams API effectively?

The Java Streams API allows you to process sequences of elements, such as collections, in a functional style. What specific use case do you have in mind?

I want to filter a list of integers to get only even numbers.

You can use the filter method. For example: list.stream().filter(n -> n % 2 == 0).collect(Collectors.toList()); This will give you a list of even numbers.

Can I also sort the filtered results?

Yes, you can chain the sorted method. For example: list.stream().filter(n -> n % 2 == 0).sorted().collect(Collectors.toList()); This will filter and sort the even numbers.

What if I want to perform an operation on each even number?

You can use the map method to apply an operation. For instance: list.stream().filter(n -> n % 2 == 0).map(n -> n * 2).collect(Collectors.toList()); This will double each even number.