no replacement. Skeletons are no longer required for remote method calls in the Java 2 platform v1.2 and greater.
The Skeleton interface is used solely by the RMI implementation.
Every version 1.1 (and version 1.1 compatible skeletons generated in 1.2 using rmic -vcompat ) skeleton class generated by the rmic stub compiler implements this interface. A skeleton for a remote object is a server-side entity that dispatches calls to the actual remote object implementation.