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I have used RMI in my code : import java.rmi.*; public interface AddServerIntf extends Remote { double add(double d1,double d2) throws RemoteException; } 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) throws RemoteException { return d1+d2; } } 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 exc) { System.out.println(exc); } } } import java.rmi.*; public class AddClient { public static void main(String args[]) { try { String Url="rmi://"+args[0]+"/AddServer"; AddServerIntf addServerIntf=(AddServerIntf)Naming.lookup(Url); 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 exc) { System.out.println(exc); } } } These are 4 .java files written. Next i compile all these files.Then I create a stub using rmic AddServerImpl . After that i start rmi registry on server side using start rmiregistry . Then i start server using java AddServer and finally client using java AddClient 27.60.200.80 5 9 . But nothing happens Exception that is thrown on client side is java.net.ConnectException : connection timed out : connect What

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