virtual file system. Java NIO.2?

Question

Java

Hello!
The documentation says twice-two, but I only have java.nio.file.ProviderNotFoundException: Provider "memory" not found . Googled already more than once, but apart from some abstract advice - nothing. Here's the code , just in case.
Thank you very much!

Answer 1

It literally says the following: " Suppose there is a provider identified by the scheme "memory" installed". That is, suppose that such a provider has already been written by someone.