Finally I get it run the sample ejb client using EJB3.0.
However, now i want to know how to connect the application server
from a different computer.( i need to specify the ip and port right? )

package converter.client;

import converter.ejb.ConverterTestRemote;
import java.math.BigDecimal;
import javax.ejb.EJB;

/**
*
* @author ian
*/
public class ConverterClient {

   @EJB
   private static ConverterTestRemote converterBean;

   /** Creates a new instance of Client */
   public ConverterClient(String[] args) {
   }

   /**
    * @param args the command line arguments
    */
   public static void main(String[] args) {
       ConverterClient client = new ConverterClient(args);
       client.doConversion();
   }

   public void doConversion() {
       try {
           BigDecimal param = new BigDecimal("100.00");
           BigDecimal yenAmount = converterBean.dollarToYen(param);

           System.out.println("$" + param + " is " + yenAmount + " Yen.");

           BigDecimal euroAmount = converterBean.yenToEuro(yenAmount);
           System.out.println(yenAmount + " Yen is " + euroAmount + "
Euro.");

           System.exit(0);
       } catch (Exception ex) {
           System.err.println("Caught an unexpected exception!");
           ex.printStackTrace();
       }
   }
}