Code review request for 6253144: Long narrowing conversion should describe the algorithm used and implied "risks"

[Joe Darcy]

Hello.

Please review this (somewhat tedious) change to make the behavior of the 
Number subtypes in the JDK more explicit:

   6253144: Long narrowing conversion should describe the algorithm 
used and implied "risks"
   http://cr.openjdk.java.net/~darcy/6253144.0/

David, how are changes to AtomicInteger and AtomicLong managed?

Thanks,

-Joe