Is it possible to cast a Stream in Java 8?

Question

Is it possible to cast a stream in Java 8? Say I have a list of objects, I can do something like this to filter out all the additional objects:

Stream.of(obj         


        

Answer 1

Late to the party, but I think it is a useful answer.

flatMap would be the shortest way to do it.

Stream.of(objects).flatMap(o->(o instanceof Client)?Stream.of((Client)o):Stream.empty())

If o is a Client then create a Stream with a single element, otherwise use the empty stream. These streams will then be flattened into a Stream.