package ejb3inaction.example;
import javax.ejb.Remote;
@Remote
public interface HelloUser
{                                        
    public void sayHello(String name);
}

package ejb3inaction.example;
import javax.ejb.Stateless;
@Stateless                                                          
public class HelloUserBean implements HelloUser
{                   
    public void sayHello(String name)
    {
        System.out.println("Hello " + name + " welcome to EJB 3 In Action!");
    }
}

package ejb3inaction.example;

import javax.ejb.EJB;

public class HelloUserClient
{
      @EJB
        private static HelloUser helloUser;
    	public static void main(String[] args)
        {
             helloUser.sayHello("Curious George");
             String h = new String("");
             System.out.println(h);
             System.out.println("Invoked EJB successfully .. see server console for output");     
        }
}

Exception in thread "main" java.lang.NullPointerException
	at ejb3inaction.example.HelloUserClient.main(HelloUserClient.java: 12 )

Properties properties = new Properties();
properties.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
properties.put("java.naming.factory.url.pkgs","org.jboss.naming : org.jnp.interfaces");
properties.put("java.naming.provider.url","localhost:1099");
InitialContext ctx = new InitialContext(properties);
HelloUser helloUser = (HelloUser) ctx.lookup("ejb3inaction.example.HelloUser");
helloUser.sayHello("Curious George");

javax.naming.NoInitialContextException: Cannot instantiate class: org.jnp.interfaces.NamingContextFactory [Root exception is java.lang.ClassNotFoundException: org.jnp.interfaces.NamingContextFactory]

/**
 * 
 */
 package  main.ejb3;

 import  java.io.Serializable;

 public   interface  IMyBean  extends  Serializable {
	
	 public   void  doSomething();

}
//==================================
 package  main.ejb3;

 import  javax.ejb.Local;

@Local
 public   interface  MyBeanLocal  extends  IMyBean {

}
//==================================
 package  main.ejb3;

 import  javax.ejb.Remote;

@Remote
 public   interface  MyBeanRemote  extends  IMyBean {

}
//==================================
 package  main.ejb3;

 import  javax.ejb.Stateless;

@Stateless
 public   class  MyBean  implements  MyBeanLocal, MyBeanRemote
{

	 /**
     * 
     */
     private   static   final   long  serialVersionUID = 1L;
	
	  public   void  doSomething()
	 {
	     System.out.println("Hello World!");
	 }
	
}
//==================================
 package  main.ejb3;

 import  javax.naming.*;
 import  java.util.Properties;

 public   class  MyBeanClient 
{

	/**
	 * @param args
	 */
	 public   static   void  main(String[] args) 
    {
		Properties properties =  new  Properties();
		properties.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
		properties.put("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces");
		properties.put("java.naming.provider.url","localhost:1099");
		
		 try  
        {
	        InitialContext ctx =  new  InitialContext(properties);
	        MyBeanRemote bean = (MyBeanRemote) ctx.lookup("MyBean/remote");
	         bean.doSomething();
	    }
         catch  (NamingException e) 
        {
	        e.printStackTrace();
	    }
	}

}

 package  ejb3inaction.example;
 import  java.io.Serializable;

 import  javax.ejb.Local;
@Local
 public   interface  HelloUserLocal  extends  Serializable {                                        
     public   void  sayHello(String name);
}
//=======================================
 package  ejb3inaction.example;
 import  java.io.Serializable;

 import  javax.ejb.Remote;
@Remote
 public   interface  HelloUserRemote  extends  Serializable {                                        
     public   void  sayHello(String name);
}
//=======================================
 package  ejb3inaction.example;
 import  javax.ejb.Stateless;
// import JLogger.JLogManager;
@Stateless
 public   class  HelloUserBean  implements  HelloUserRemote, HelloUserLocal
{                   
    /**
     * 
     */
     private   static   final   long  serialVersionUID = 1L;

     public   void  sayHello(String name)
    {
        // JLogManager jLogMan = new JLogManager("C:\\logEJB.txt");
        // jLogMan.logInfoEvent("HelloUserBean->sayHello", "got into");
        // jLogMan.logInfoEvent("HelloUserBean->sayHello", "name = " + name);
        System.out.println("Hello " + name + " welcome to EJB 3 In Action!");
        // jLogMan.logInfoEvent("HelloUserBean->sayHello", "after System.out, getting out");
    }
}
//=============================================
 package  ejb3inaction.example;

 import  java.util.Properties;

 import  javax.naming.InitialContext;
 import  javax.naming.NamingException;

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

            Properties properties =  new  Properties();
            properties.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
            properties.put("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces");
            properties.put("java.naming.provider.url","localhost:1099");

            
             try  
            {
                InitialContext ctx =  new  InitialContext(properties);
                HelloUserRemote helloUserRemote = (HelloUserRemote) ctx.lookup("HelloUserBean/remote");
                helloUserRemote.sayHello("Curious George");
                System.out.println("Invoked EJB successfully .. see server console for output");
            }
             catch  (NamingException e) 
            {
                e.printStackTrace();
            }

        }
}