How do I use Java Streams to collect data?

Can you explain how to use Java Streams to collect data from a list?

Sure! In Java, you can use the collect method of the Stream API to gather elements from a stream into a collection. For example, you can convert a list of strings to a set using Collectors.toSet().

Can you show me a code example?

Absolutely! Here's a simple example:

List<String> names = Arrays.asList("Alice", "Bob", "Charlie");
Set<String> nameSet = names.stream().collect(Collectors.toSet());

This code converts a list of names into a set.

What if I want to collect the names into a list instead?

You can use Collectors.toList() instead. Here's how:

List<String> nameList = names.stream().collect(Collectors.toList());

This will give you a list of names.

Are there other collectors I can use?

Yes, there are several collectors available, such as Collectors.groupingBy(), Collectors.partitioningBy(), and Collectors.joining(), each serving different purposes.