EJB 3.0 NullPointerException

Question

Hi,
I'm a new to JavaEE, especially to ejb3.
I'm trying to develop a client that call a method against a facade method.
This's the "session bean for entity class" (automatically written by NeatBeans) equipped to Remote Interface.
package ejb;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
public class NewsEntityFacade implements NewsEntityFacadeRemote {
    @PersistenceContext
    private EntityManager em;
    /** Creates a new instance of NewsEntityFacade */
    public NewsEntityFacade() {
    public void create(NewsEntity newsEntity) {
        em.persist(newsEntity);
    public void edit(NewsEntity newsEntity) {
        em.merge(newsEntity);
    public void destroy(NewsEntity newsEntity) {
        em.merge(newsEntity);
        em.remove(newsEntity);
    public NewsEntity find(Object pk) {
        return (NewsEntity) em.find(NewsEntity.class, pk);
    public List findAll() {
        return em.createQuery("select object(o) from NewsEntity as o").getResultList();
}And the client's Main.
package newsappclient;
import ejb.NewsEntityFacadeRemote;
import java.util.List;
import javax.ejb.EJB;
public class Main {
    @EJB
    private static NewsEntityFacadeRemote newsEntityFacade;
    /** Creates a new instance of Main */
    public Main() {
     * @param args the command line arguments
    public static void main(String[] args) {
        // TODO code application logic here
        List EntityList=newsEntityFacade.findAll();
        for(...
            ...etc...
}I get the following Exception:
12-set-2007 11.08.48 com.sun.enterprise.appclient.MainWithModuleSupport <init>
AVVERTENZA: ACC003: Application threw an exception.
java.lang.NullPointerException
at newsappclient.Main.main(Main.java:33)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.enterprise.util.Utility.invokeApplicationMain(Utility.java:232)
at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:329)
at com.sun.enterprise.appclient.Main.main(Main.java:180)
Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:340)
at com.sun.enterprise.appclient.Main.main(Main.java:180)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.enterprise.util.Utility.invokeApplicationMain(Utility.java:232)
at com.sun.enterprise.appclient.MainWithModuleSupport.<init>(MainWithModuleSupport.java:329)
... 1 more
Caused by: java.lang.NullPointerException
at newsappclient.Main.main(Main.java:33)
... 7 more
Java Result: 1
run-jar:
run-display-browser:
run:
Could some one tell me what I'm doing wrong ?
Thanks in advance.
s1a2

Answer 1

Me is facing the same problem
Code of sample application is here
in Netbeans 5.5 sun application server
@Remote
public interface Hello {     
     public String hello();
@Stateless
@Remote
public class HelloBean implements Hello{     
     public String hello(){
          return "Hello World";
public class HelloClient {
     @EJB
private static Hello hello;     
     /** Creates a new instance of Client */
     public HelloClient () {
     * @param args
     public static void main(String[] args) throws Exception{          
          if(hello!= null)
               System.out.println( hello.hello()) ;
          else
               System.out.println("hello object is null ..........");
}