is used to identify a remote object exported to an RMI runtime. When a remote object is exported, it is assigned an object identifier either implicitly or explicitly, depending on the API used to export.
ObjID() constructor can be used to generate a unique object identifier. Such an
ObjID is unique over time with respect to the host it is generated on. The
ObjID(int) constructor can be used to create a "well-known" object identifier. The scope of a well-known
ObjID depends on the RMI runtime it is exported to.
ObjID instance contains an object number (of type
long) and an address space identifier (of type
UID). In a unique
ObjID, the address space identifier is unique with respect to a given host over time. In a well-known
ObjID, the address space identifier is equivalent to one returned by invoking the
UID(short) constructor with the value zero.
If the system property
java.rmi.server.randomIDs is defined to equal the string
"true" (case insensitive), then the
ObjID() constructor will use a cryptographically strong random number generator to choose the object number of the returned