import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;

class HelloImpl implements Hello {    
    
    public String sayHello() throws RemoteException {
	System.out.println("Remote Invokation of method sayHello()"); 
        return  "Hello World!";
    }

}

public class HelloServer {    
    
    public static void main(String args[]) { 
	
        try {
            String name = "Hello";
	    Hello hello = new HelloImpl(); 
            Hello stub = (Hello) UnicastRemoteObject.exportObject(hello, 0);
            Registry registry = LocateRegistry.getRegistry();
            registry.rebind(name, stub);
	    
        } catch (Exception e) { 
	    System.out.println("HelloServer Exception: " + e.getMessage()); 
	    e.printStackTrace(); 
        } 
    } 
}