RMI CALCULATOR EXAMPLEInterface

public interface Calculator extends java.rmi.Remote {

public void add(int num1, int num2)throws java.rmi.RemoteException;

public void mul(int a, int b)throws java.rmi.RemoteException;

public void sub(int num1, int num2)throws java.rmi.RemoteException;}

Implement Class

public class Cal extends java.rmi.server.UnicastRemoteObject implements Calculator {

public Cal() throws java.rmi.RemoteException {super();}public void add(int a, int b) throws java.rmi.RemoteException{ int sum=a+b; System.out.println("Sum:"+sum);}public void mul(int a, int b) throws java.rmi.RemoteException{ int mul=a*b; System.out.println("Mul:"+mul);

}public void sub(int n, int m) throws java.rmi.RemoteException{ int sub=n-m; System.out.println("Sub:"+sub);}}

Binding registryimport java.rmi.Naming;

public class Call { public Call() {

try { Cal c = new Cal(); Naming.rebind("rmi://localhost/Call", c); } catch (Exception e) { System.out.println("Server Error: " + e); } } public static void main(String args[]) { //Create the new Calculator servernew Call(); }}

CLIENT CLASS

import java.net.MalformedURLException;import java.rmi.Naming;import java.rmi.NotBoundException;import java.rmi.RemoteException;

public class Client {

public static void main(String[] args) throws NotBoundException, MalformedURLException { try {

Calculator c = (Calculator) Naming.lookup("rmi://localhost/Call");

c.add(23,34);c.mul(2, 3);

c.sub(23, 10);// Catch the exceptions that may occur - rubbish URL, Remote

exception } catch (RemoteException re) {

System.out.println("RemoteException"+re); } }}