What is the Java Streams API collect method?

Can you explain what the collect method in the Java Streams API does?

Sure! The collect method in the Java Streams API is a terminal operation that transforms the elements of a stream into a different form, usually a collection like a List, Set, or Map.

How do I use the collect method to convert a stream to a List?

You can use the Collectors.toList() method. For example: List<String> list = stream.collect(Collectors.toList()); This will collect the elements of the stream into a List.

Are there other collectors I can use with the collect method?

Yes, there are several collectors available, such as Collectors.toSet(), Collectors.toMap(), and Collectors.joining() for concatenating strings.

Can you give me an example of using collect with toMap?

Certainly! You can use it like this: Map<Integer, String> map = stream.collect(Collectors.toMap(String::length, Function.identity())); This creates a map where the key is the length of the string and the value is the string itself.