Java Rmi adding two numbers

AddServerIntf.java
import java.rmi.*;

public interface AddServerIntf extends Remote

{

double add(double d1,double d2)throws RemoteException;

}
AddServerImpl.java

import java.rmi.*;

import java.rmi.server.*;

public class AddServerImpl extends UnicastRemoteObject implements AddServerIntf

{

public AddServerImpl()throws RemoteException

{

}

public double add(double d1,double d2)

{

return d1+d2;

}

}

*AddClient.java

import java.rmi.*;

public class AddClient

{

public static void main (String args[])

{

try{

String addserverURL="rmi://"+args[0]+ "/AddServer";

AddServerIntf addserverintf=(AddServerIntf)Naming.lookup(addserverURL);

System.out.println("The first number is:"+args[1]);

double d1=Double.valueOf(args[1]).doubleValue();

System.out.println("the second number is:"+args[2]);

double d2=Double.valueOf(args[2]).doubleValue();

System.out.println("The sum is:"+addserverintf.add(d1,d2));

}

catch(Exception e)

{

System.out.println("Exception:"+e);

}

}

}

*AddServer.java

import java.net.*;

import java.rmi.*;

public class AddServer

{

public static void main(String args[])

{

try{

AddServerImpl addserverimpl=new AddServerImpl();

Naming.rebind("AddServer",addserverimpl);

}

catch(Exception e)

{

System.out.println("Exception"+e);

}

}

}

Intialization:set u r path to java bin in cmd.Eg:set path=c:\programfiles\jdk1.3\bin

1.Compile al the files.(javac filename.java)
2.Create stub and skeleton for your AddServerImpl.java using the following command

rmic -vcompat AddServerImpl

3.Run the rmiregistry from bin of your jdk folder,leave it unclosed.
4.Run your server file with foolwing command:

java AddServer

5.Open new command prompt window,set the path and run your client code:

java AddClient 127.0.0.1 1 1
6.u should c the summed up value,here 127.0.0.1 is the local host(ur own system).

**If the program is not working set the CLASSPATH in the environmental variable:

Right click my computer->properties->advanced->Environment variable(at de bottome)
In the user variable click new type name as CLASSPATH and for value set u r path where ur java code resides.
Eg:c:\java\rmi