only code , author holds masters degree in computers in 2001 from Andhra University faculty of Engineering ........later another masters degree in CSE from JNTU HYD campus ...... This is the program for RMI implementation developed by the Ramu senior java&j2EE programmer

 import java.rmi.*;

public interface readinterface extends Remote

{public int read() throwsRemoteException;

}

import java.rmi.*;

import java.rmi.server.*;

import java.io.*;

public class readserver extends UnicastRemoteObject implements readinterface

{

public readserver()throwsRemoteException

{

}

public int read() throws RemoteException

{

DataInputStream k=new DataInputStream(System.in);

try

{

int r=Integer.parseInt(k.readLine());

return r;

}

catch(Exception e)

{System.out.println("the io exception raised in the read function"); }

return 1;

}

public static void main(String agrs[])

{

try

{

readserver r1=new readserver();

Naming.rebind("ramu1",r1);

System.out.println("the ramu1 server started for reading");

}

catch(Exception e)

{

System.out.println("the exception raised in the read server");

}}}

import java.rmi.*;

public interface addinterface extends Remote

{

public int add(int x,int y) throws RemoteException;

public int sub(int x,int y) throws RemoteException;

}

import java.rmi.*;

import java.rmi.server.*;

import java.io.*;

public class addserver  extends UnicastRemoteObject implements addinterface

{

public addserver() throws RemoteException

{}

public int add(int x,int y)  throws RemoteException

{

return x+y;

}

public int sub(int x,int y)  throws RemoteException

{

return x-y;

}

public static void main(String args[])

{

try

{

addserver a=new addserver();

Naming.rebind("ramu2",a);

System.out.println(" the add server ramu2 is also started");

}

catch(Exception e){}

}}

import java.rmi.*;

import java.rmi.server.*;

public class myclint 

{

public static void main(String args[])

{

try

{

readinterface r= (readinterface)Naming.lookup("ramu1");

addinterface a=(addinterface)Naming.lookup("ramu2");

int x=r.read();

System.out.println("this value is obtained from server1"+x);

int y=r.read();

System.out.println("this value is obtained from server1"+y);

int z=a.add(x,y);

System.out.println("\n this result is obtained form the second server"+z);

}

catch(Exception e){}

}}

for creation of batchfile for the above program  run.bat

javac addinterface.java

javac addserver.java

javac readinterface.java

javac readserver.java

start rmiregistry

rmic addserver

rmic readserver

start  java addserver

start  java readserver

java myclint