----------------------------------------------------------------------------------
                    Interface
----------------------------------------------------------------------------------
publicinterface perInterface extends java.rmi.Remote

{
    float find_per(int marks[]) throws java.rmi.RemoteException;
}


-------------------------------------------------------------------------------------------------
                    Implementation
-------------------------------------------------------------------------------------------------

import java.rmi.*;
import java.rmi.registry.*;
import java.rmi.server.UnicastRemoteObject;

publicclass perImpl extends UnicastRemoteObject
               implements perInterface
{
    public perImpl(String name) throws RemoteException
    {
        super();
        try
        {
            Naming.rebind(name,this);
        }
        catch(Exception e) 
        { 
            System.out.println("Exception:"+ e.getMessage());
            e.printStackTrace();
        }
    }

    publicfloat find_per(int marks[]) throws RemoteException
    {
        int sum=0;
        float per;

        for(int counter=0;counter < marks.length;counter++)
            sum+=marks[counter];

        per = (float)sum/3;

        return per;
    }

}

-------------------------------------------------------------------------------------------------
                    Client
-------------------------------------------------------------------------------------------------

import java.rmi.*;
import java.rmi.registry.*;
import java.rmi.server.*;
import java.io.*;

publicclass perClient
{
    publicstaticvoid main(String args[])
    {
        System.setSecurityManager(new RMISecurityManager());

        try
        {
            float percentage=0;
            int marks[]=newint[6];

            perInterface pi = (perInterface) Naming.lookup("//localhost/pno");

            BufferedReader ber=new BufferedReader(new InputStreamReader(System.in));
            String temp=new String();

            for(int counter=0;counter<6;counter++)
            {
                System.out.print("\n Enter Marks For Subject " + (counter+1) + " : ");
                temp=ber.readLine();
                marks[counter]=Integer.parseInt(temp);
            }


            percentage = pi.find_per(marks);
            System.out.println("Percentage is : " + percentage);

        }
        catch(Exception e)
        {
            System.out.println("System Exception" + e);
        }
    }
}


-------------------------------------------------------------------------------------------------
                    Server
-------------------------------------------------------------------------------------------------

import java.rmi.*;
import java.rmi.registry.*;
import java.rmi.server.*;

publicclass perServer
{
    publicstaticvoid main(String args[])
    {
        System.setSecurityManager(new RMISecurityManager());

        try
        {
            perImpl pim = new perImpl("//localhost/pno");
            System.out.println("\nServer is ready...");
        }
        catch(Exception e) 
        { 
            System.out.println("Exception: " + e.getMessage());
            e.printStackTrace();
        }
    }
}    


-------------------------------------------------------------------------------------------------
                    Policy
-------------------------------------------------------------------------------------------------

grant
{
    // Allow everything for now
    permission java.security.AllPermission;
};

----------------------------------------------------------------------------------
                    Output
----------------------------------------------------------------------------------


 Enter Marks For Subject 1 : 30

 Enter Marks For Subject 2 : 25

 Enter Marks For Subject 3 : 28

 Enter Marks For Subject 4 : 21

 Enter Marks For Subject 5 : 29

 Enter Marks For Subject 6 : 22
Percentage is : 51.666668