Reviewed-by: mduigou
Contributed-by: NAkhil Arora <akhil.arora@oracle.com>

Summary: Spliterator implementations for collection classes in java.util.
Reviewed-by: mduigou, briangoetz
Contributed-by: NDoug Lea &lt;dl@cs.oswego.edu&gt;, Paul Sandoz <paul.sandoz@oracle.com>

Reviewed-by: alanb, mduigou, psandoz, ulfzibis
Contributed-by: NAkhil Arora <akhil.arora@oracle.com>

Summary: to use new InternalError constructor with cause chainning
Reviewed-by: alanb, ksrini, xuelei, neugens
Contributed-by: sebastian.sickelmann@gmx.de

Reviewed-by: dholmes

Reviewed-by: dholmes, chegar, mduigou

Reviewed-by: xdono

Reviewed-by: darcy, lancea, alanb, briangoetz, mduigou, mchung

Summary: Cleanup by simply making Deque equal status with List
Reviewed-by: darcy

Reviewed-by: darcy, weijun

Summary: LinkedList of size N creates N+1 instead of N+2 objects.  Comparing against null is faster than comparing against sentinel node
Reviewed-by: dl, jjb, forax