help for java rmi

[clapton]

Hi.
I wrote this program claculator java rmi.but not implemented.
you can help me?

    import java.rmi.Remote;
    import java.rmi.RemoteException;
     
    public interface calculator extends Remote {
     
    public long add(long a, long b)
    throws RemoteException;
     
    public long sub(long a, long b)
    throws RemoteException;
     
    public long mul(long a, long b)
    throws RemoteException;
     
    public long div(long a, long b)
    throws RemoteException;
    }

    import java.rmi.Naming;
    import java.rmi.RemoteException;
    import java.rmi.RMISecurityManager;
    import java.rmi.server.UnicastRemoteObject;
     
    public class calculatorServer extends UnicastRemoteObject implements calculator {
    public calculatorServer () throws RemoteException {
    super();
    }
    public long add(long a, long b) {
    return a + b;
    }
    public long sub(long a, long b) {
    return a * b;
    }
    public long mul(long a, long b) {
    return a - b;
    }
    public long div(long a, long b) {
    return a / b;
    }
    public static void main(String args[]) {
     
    try {
    Calculatorserver clapton = new Calculatorserver();
    Naming.rebind("rmi://localhost:1099/CalculatorService", clapton);
    } catch (Exception e) {
    System.out.println("Trouble: " + e);
    }
    }
     
     
    }

    import java.rmi.Naming;
    import java.rmi.RemoteException;
     
    public class CalculatorClient {
     
    public static void main(String[] args) {
    try {
    Calculator clapton = (Calculator)
    Naming.lookup(
    "rmi://localhost
    /CalculatorService");
    System.out.println( c.sub(4, 3) );
    System.out.println( c.add(4, 5) );
    System.out.println( c.mul(3, 6) );
    System.out.println( c.div(9, 3) );
    }
    catch (Exception e) {
    System.out.println("Trouble: " + e);
    }
    }
    }

[Tolls]

Help with what exactly?

[clapton]

i can't run this program.it is not work.you can run this program?

[Tolls]

I'm not even going to try.

You need to tell us what the problem is...and "it doesn't work" is not a good answer.