java-9

Can I hold java 8 and java 9 at the same time?

There are Java 8, Java 9 and JDK 8 and JDK 9. Do I need to remove one of the versions so that no crashes occur? I am inte ... cause there is one java application that was created on another computer that does not run on mine. Maybe that's the point.

Is it possible to get both min() and max () from one Stream at once?

Let there be IntStream, is it possible to get from it a valid array or sheet, in which there will be 2 values min and max of the stream? Or is it even possible to somehow call the terminal method on the stream more than 1 time?