Hi,

http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8069325-Pattern-splitAsStream-emptyInput/webrev/

This patch fixes an edge case in Pattern.splitAsStream for matching against an 
empty input string, which deviated from the behaviour of Pattern.split. When 
there are no matches a stream containing the input string should be returned 
rather than an empty stream.

--

I have kept compatibility with Pattern.split(String ) but i noticed another an 
edge case.

What should the following return:

  Pattern.compile("").split("")

[] or [""]?

There is a zero-width match at the beginning and an empty remaining segment 
both of which should be discarded, as such i would expect the result to be [] 
rather than as [""], as currently produced result.

If people agree that this is an issue i suggest we log a new one independent of 
fixing 8069325.

Thanks,
Paul.

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