// CountRMIImpl.java, CountRMI implementation

import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;

publicclass CountRMIImpl extends UnicastRemoteObject
       implements CountRMI
{
  privateint sum;

  public CountRMIImpl(String name) throws RemoteException
  {
    super();
    try
    {
      Naming.rebind(name, this);
      sum = 0;
    } catch (Exception e)
    { System.out.println("Exception: " + e.getMessage());
      e.printStackTrace();
    }
  }

  publicint sum() throws RemoteException
  { return sum;
  }

  publicvoid sum(int val) throws RemoteException
  { sum = val;
  }

  publicint increment() throws RemoteException
  { sum++;
    return sum;
  }
}


// CountRMIClient.java  RMI Count client

import java.rmi.*;
import java.rmi.registry.*;
import java.rmi.server.*;

publicclass CountRMIClient
{ publicstaticvoid main(String args[])
  { // Create and install the security manager
    System.setSecurityManager(new RMISecurityManager());

    try
    { 
        //CountRMI myCount = (CountRMI)Naming.lookup("rmi://"//                  + args[0] + "/" + "myCountRMI");
    CountRMI myCount = (CountRMI)Naming.lookup("//"
                          + args[0] + "/" + "myCountRMI");
      // Set Sum to initial value of 0
      System.out.println("Setting Sum to 0");
      myCount.sum(0);

      // Calculate Start timelong startTime = System.currentTimeMillis();

      // Increment 1000 times
      System.out.println("Incrementing");
      for (int i = 0 ; i < 1000 ; i++ )
      { myCount.increment();
      }

      // Calculate stop time; print out statisticslong stopTime = System.currentTimeMillis();
      System.out.println("Avg Ping = "
                       + ((stopTime - startTime)/1000f)
                       + " msecs");
      System.out.println("Sum = " + myCount.sum());
    } catch(Exception e)
    { System.err.println("System Exception" + e);
    }
   System.exit(0);
  }
}



// CountRMIServer.java

import java.rmi.*;
import java.rmi.server.*;

publicclass CountRMIServer
{

 publicstaticvoid main(String args[])
 { 

   // Create and install the security manager
   System.setSecurityManager(new RMISecurityManager());

   try
   {
     // Create CountRMIImpl
     CountRMIImpl myCount = new CountRMIImpl("//xyz/myCountRMI");
     System.out.println("CountRMI Server ready.");
   } catch (Exception e)
   { System.out.println("Exception: " + e.getMessage());
     e.printStackTrace();
   }
 }
}