Hi, http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8069325-Pattern-splitAsStream-e... 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.