What are streams in Java and how do they work?

What are streams in Java and how do they work?

Streams in Java are sequences of data elements that can be processed in a functional style. They allow for operations like filtering, mapping, and reducing.

Can you explain the difference between a stream and a collection?

Sure! A collection is a data structure that holds elements, while a stream is a view of a sequence of elements that can be processed. Streams do not store data; they operate on data from collections.

How do I create a stream from a list?

You can create a stream from a list using the stream() method. For example: List<String> list = Arrays.asList("a", "b", "c"); Stream<String> stream = list.stream();.

What are some common operations I can perform on streams?

Common operations include filter(), map(), reduce(), and collect(). These allow you to manipulate and process the data in various ways.