Provides a class and two interfaces for the RMI registry.
A registry is a remote object that maps names to remote objects. A
server registers its remote objects with the registry so that they can
be looked up. When an object wants to invoke a method on a remote
object, it must first lookup the remote object using its name. The
registry returns to the calling object a reference to the remote
object, using which a remote method can be invoked.
LocateRegistry is used to obtain a reference to a bootstrap
remote object registry on a particular host (including the local host), or
to create a remote object registry that accepts calls on a specific port.