Perform operation on n random distinct elements from Collection using Streams API

Question

I\'m attempting to retrieve n unique random elements for further processing from a Collection using the Streams API in Java 8, however, without much or any luck.

Mor

Answer 1

You can use limit to solve your problem.

http://docs.oracle.com/javase/8/docs/api/java/util/stream/Stream.html#limit-long-

Collections.shuffle(collection); 

int howManyDoYouWant = 10;
List smallerCollection = collection
    .stream()
    .limit(howManyDoYouWant)
    .collect(Collectors.toList());