For the constructors and static exportObject methods below, the stub for a remote object being exported is obtained as follows:

• If the remote object is exported using the UnicastRemoteObject.exportObject(Remote) method, a stub class (typically pregenerated from the remote object's class using the rmic tool) is loaded and an instance of that stub class is constructed as follows.
  • A "root class" is determined as follows: if the remote object's class directly implements an interface that extends Remote, then the remote object's class is the root class; otherwise, the root class is the most derived superclass of the remote object's class that directly implements an interface that extends Remote.
  • The name of the stub class to load is determined by concatenating the binary name of the root class with the suffix "_Stub".
  • The stub class is loaded by name using the class loader of the root class. The stub class must extend RemoteStub and must have a public constructor that has one parameter, of type RemoteRef.
  • Finally, an instance of the stub class is constructed with a RemoteRef.
• If the appropriate stub class could not be found, or the stub class could not be loaded, or a problem occurs creating the stub instance, a StubNotFoundException is thrown.

• For all other means of exporting:
  • If the remote object's stub class (as defined above) could not be loaded or the system property java.rmi.server.ignoreStubClasses is set to "true" (case insensitive), a Proxy instance is constructed with the following properties:
    • The proxy's class is defined by the class loader of the remote object's class.
    • The proxy implements all the remote interfaces implemented by the remote object's class.
    • The proxy's invocation handler is a RemoteObjectInvocationHandler instance constructed with a RemoteRef.
    • If the proxy could not be created, a StubNotFoundException will be thrown.

  • Otherwise, an instance of the remote object's stub class (as described above) is used as the stub.