RFR : 8013712 : (XS) Add Objects.nonNull and Objects.isNull

[Mike Duigou]

Hello all;

Another changeset coming from the lambda libraries effort. This one is two small additions to the Objects class. The introduced methods are not really intended to be used directly, comparison operators work better in imperative logic, but the methods will be very useful as Predicates.

http://cr.openjdk.java.net/~mduigou/JDK-8013712/0/webrev/

Thanks,

Mike