want to try out small idea; where is the implementing class for Stream interface?

[Anil]

Hi,
I had a small idea on debugging of streams and was trying to implement it
to see if it works.
I am able to build the OpenJDK (on Windows 11, Cygwin64).
However, I am unable to find the implementing class of java.util.Stream.
Can you please help?
thanks,
Anil Philip