Need Help with Class Cast Exception

[soxfan714]

I start the rmi registry, then I run the server and everything seems to be fine.
When I run the client, I get this exception:

Exception in thread "main" java.lang.ClassCastException: $Proxy1 cannot be cast
to cscie160.hw5.ATM
at $Proxy0.getATM(Unknown Source)
at cscie160.hw5.Client.main(Client.java:13)

This is the server code

package cscie160.hw5;

import java.rmi.*;

public class Server {
    public static void main(String[] args) {

        try {
            ATMFactoryImpl atmfactory = new ATMFactoryImpl();
            Naming.rebind("//localhost/atmfactory", atmfactory);
            System.out.println("ATMFactory is bound in regsitry");
        } catch (Exception e) {
            System.out.println("Server err: " + e.getMessage());
            e.printStackTrace();
        }
    }
}

This is the client code:

package cscie160.hw5;
  import java.net.MalformedURLException;
  import java.rmi.Naming;
  import java.rmi.NotBoundException;
  import java.rmi.RemoteException;
  import java.rmi.UnknownHostException;
  
  public class Client {
     public static void main(String[] args) {
        ATM atm = null;
        try {
           ATMFactory factory = (ATMFactory)Naming.lookup("//localhost/atmfactory");
           atm = factory.getATM();
        } catch (MalformedURLException mue) {
           mue.printStackTrace();
        } catch (NotBoundException nbe) {
           nbe.printStackTrace();
        } catch (UnknownHostException uhe) {
           uhe.printStackTrace();
        } catch (RemoteException re) {
           re.printStackTrace();
        }
        if (atm!=null) {
           try {
              // get initial account balance
              System.out.println("Initial Balances");
              System.out.println("Balance(0000001): "+atm.getBalance(0000001));
              System.out.println("Balance(0000002): "+atm.getBalance(0000002));
              System.out.println("Balance(0000003): "+atm.getBalance(0000003));
              System.out.println();
              // make $1000 depoist in account 0000001 and get new balance
              System.out.println("Depositting(0000001): 1000 ");
              atm.deposit(0000001, 1000);
              System.out.println("Balance(0000001): "+atm.getBalance(0000001));
              // make $100 withdrawal from account 0000002 and get new balance
              System.out.println("Withdrawing(0000002): 100 ");
              atm.withdraw(0000002, 100);
              System.out.println("Balance(0000002): "+atm.getBalance(0000002));
              // make $500 deposit in account 0000003 and get new balance
              System.out.println("Depositting(0000003): 500 ");
              atm.deposit(0000003, 500);
              System.out.println("Balance(0000003): "+atm.getBalance(0000003));
              // get final account balance
              System.out.println();
              System.out.println("Final Balances");
              System.out.println("Balance(0000001): "+atm.getBalance(0000001));
              System.out.println("Balance(0000002): "+atm.getBalance(0000002));
              System.out.println("Balance(0000003): "+atm.getBalance(0000003));
           } catch (RemoteException re) {
              System.out.println("An exception occurred while communicating with the ATM");
              re.printStackTrace();
           }
        }
     }
  }

This is the ATMFactory Code:

package cscie160.hw5;

import java.rmi.RemoteException;

/**
 * Public Interface ATMFactory
 * getATM()
 */
public interface ATMFactory extends java.rmi.Remote{
	public ATM getATM() throws RemoteException;
}

Any help would be greatly appreciated.

[Nicholas Jordan]

From your tutorial:

The java.rmi.Naming class provides methods lookup, bind, rebind, unbind and list (returns an array of object name registered on the host: port). The naming service is accessed on a particular host: port combination.

Source: distance education section of Harvard Extension CSCIE160

( note the colon is parsing as a smiley so there is an embedded space that is to be removed )

[smartino]

Can you provide a little more detail about the answer provided, I am having the same issue...