Null Pointer Exception in Stateless Session Beans(EJB 3.0)

Question

I am executing a simple HelloUser example i code session bean interface and implementing session bean class in the EJB project.
package ejb3inaction.ejb;
import javax.ejb.Remote;
@Remote
public interface HelloUser {                                       
public void sayHello(String name);
package ejb3inaction.ejb;
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!");
And in the client project i code this class and add JAR file of the EJB project.
package ejb3inaction.example;
import javax.ejb.EJB;
import ejb3inaction.ejb.*;
public class HelloUserClient {
@EJB
private static HelloUser helloUser;
     public static void main(String[] args) {
helloUser.sayHello("Curious George");
System.out.println("Invoked EJB successfully .. see server console for output");
I am using netbeans 6.0(10 M) and Sun Application server 9.
it gives NullPointer Exception at the following line...
helloUser.sayHello("Curious George");
how i can resolve this error.
regards,
deemy

Answer 1

Well, helloUser is just a null reference, you haven't created an instance of HelloUser to use, hence the NPE