Java 8 Stream IllegalStateException: Stream has already been operated on or closed

Question

I\'m trying to generate Order instances using the Stream API. I have a factory function that creates the order, and a DoubleStream is used to initialize the amount of the o

Answer 1

You should use Supplier function interface for your initialization like this

Supplier> streamSupplier = () -> (new Random().doubles(50.0, 200.0).boxed());

And change your way to get double like this

streamSupplier.get().findFirst().get()

Then it works normally.

Found this way from the post Stream has already been operated upon or closed Exception