Can I duplicate a Stream in Java 8?

Question

Sometimes I want to perform a set of operations on a stream, and then process the resulting stream two different ways with other operations.

Can I do this without ha

Answer 1

Either,

• Move the initialisation into a method, and simply call the method again

This has the advantage of being explicit about what you are doing, and also works for infinite streams.

• Collect the stream and then re-stream it

In your example:

final int[] arr = IntStream.range(1, 100).filter(n -> n % 2 == 0).toArray();

Then

final IntStream s = IntStream.of(arr);