hg: lambda/lambda/jdk: 8009736: Comparator to allow narrowing type on combinator APIs

[Dan Smith]

To be consistent, Comparators.reverseOrder should be changed to match (thus avoiding an unchecked cast).  	Don't know what our compatibility policies are for existing generic methods, though...

—Dan

On Mar 9, 2013, at 11:27 PM, henry.jen at oracle.com wrote:

> Changeset: fb7b7275d220
> Author:    henryjen
> Date:      2013-03-08 21:54 -0800
> URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/fb7b7275d220
> 
> 8009736: Comparator to allow narrowing type on combinator APIs
> Reviewed-by:
> Summary: Allow to narrow return type, add javadoc return tag
> Allow key extract not limited to Comparable, but use a Comparator of key type.
> 
> ! src/share/classes/java/util/Comparator.java
> ! src/share/classes/java/util/Comparators.java
> 
>