The Remote Interface in Java RMI (Remote Method Invocation) plays a crucial role as it defines the methods that can be called remotely by a client. When a class implements a Remote Interface, it signifies that the methods of this class can be invoked from another JVM, potentially on a different host. Here are the key aspects of the role of Remote Interface in RMI:
Defining Remote Methods: A Remote Interface in RMI is used to declare the methods that can be invoked remotely. These methods must be designed to handle network communication, including the possibility of network failures[1][2][5].
Extending java.rmi.Remote: All Remote Interfaces must extend the java.rmi.Remote interface, which is a marker interface. This does not define any methods itself but indicates that the implementing class is intended for use in a distributed environment[1][2][5].
Handling RemoteExceptions: Methods declared within a Remote Interface must specify java.rmi.RemoteException in their throws clause. This is because remote method invocation can fail for various reasons, such as network issues, and clients need to be able to handle these exceptions[1][2][5].
Separating Interface from Implementation: Clients interact with the remote objects through their Remote Interfaces, not with the implementation classes directly. This allows for the separation of the public interface from the implementation details, which can change without affecting the clients[1][2].
Enabling Polymorphism: Remote Interfaces support polymorphism in RMI. A remote object can be cast to any of the set of remote interface...
