Summary: to undo the change for 6559590
Reviewed-by: darcy

6559590: Pattern.compile(".*").split("") returns incorrect result
Summary: updated spec/impl for these two corner cases
Reviewed-by: alanb, psandoz

Reviewed-by: naoto

Reviewed-by: alanb, mduigou, dholmes

7172553: A utility class that forms the basis of a String.join() operation
Summary: Integrate StringJoiner changes from lambda
Reviewed-by: alanb, mduigou

Summary: Fix to ensure singleton property of String.CaseInsensitiveComparator is maintained through de/serialization.
Reviewed-by: alanb, forax, smarks, dholmes
Contributed-by: darryl.mocek@oracle.com

Reviewed-by: xdono

Summary: Rewrite lastIndexOf for performance and correctness
Reviewed-by: sherman
Contributed-by: NReviewed by Ulf Zibis <ulf.zibis@gmx.de>

Reviewed-by: darcy, weijun

Summary: Added a fastpath for simple use case
Reviewed-by: alanb, martin

Reviewed-by: okutsu, naoto