Listing 4. UseCalculator.java, Which Connects to and Uses Our

package il.co.lerner.calculator;

import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

import il.co.lerner.calculator.Calculator;
import il.co.lerner.calculator.CalculatorHome;

class UseCalculator
{
   public static void main(String[] args)
   {
      try
         {
            // Get a naming context
            InitialContext jndiContext =

            System.out.println("Got context");

            // Get a reference to the Calculator Bean
            Object ref = jndiContext.lookup

            System.out.println("Got reference");

            // Get a reference from this to the
            // Bean's Home interface
            CalculatorHome home = (CalculatorHome)
                PortableRemoteObject.narrow


            // Create a Calculator object from the
            // Home interface
            Calculator calculator = home.create();

            // call multiply()
            System.out.println("Multiplying 2 x 3:");
            System.out.println

         }
      catch(Exception e)
         {
            System.out.println(e.toString());
         }
    }
}