EJB 2.1: NullPointException

Hi,

I am using netbeans to develop my applications. Whenever I deploy the application and view it from the browser and access the related servlet through the HTML, it is giving me "NullPointException". I am u8sing GlassFish server 3.1. All the details are below

LoanBean.java

/*
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 * and open the template in the editor.
 */
package ejb;

import java.util.*;
import java.io.*;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import java.rmi.RemoteException;
import javax.ejb.CreateException;

public class LoanBean implements SessionBean
{
    private SessionContext ctx;
    
    public void setSessionContext(SessionContext ctx)
    {
        this.ctx = ctx;
    }
    
    public void ejbCrate() throws RemoteException, CreateException
    {
        System.out.println("ejbCreate() executed");
    }
    
    public void ejbRemove()
    {
        System.out.println("ejbRemove() invoked");
    }
    
    public void ejbActivate()
    {
        System.out.println("ejbActivate() invoked");
    }
    
    public void ejbPassivate()
    {
        System.out.println("ejbPassivate() invoked");
    }
    
    public float calculateInterest(float rate, float time, float amount)throws RemoteException
    {
        float interest = time * amount * (rate/100);
        return interest;
    }
}

LoanBeanRemote.java

LoanBeanRemoteHome.java

LoanBeanServlet.java

import ejb.LoanBeanRemote;
import ejb.LoanBeanRemoteHome;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.naming.*;
import javax.ejb.*;
import java.rmi.*;

import javax.rmi.PortableRemoteObject;

public class LoanBeanServlet extends HttpServlet
{
    public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException
    {
        doPost(request,response);
    }
    
    public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException
    {
        PrintWriter out = response.getWriter();
        
        float rate = Float.valueOf(request.getParameter("rate")).floatValue();
        float time = Float.valueOf(request.getParameter("time")).floatValue();
        float amount = Float.valueOf(request.getParameter("amount")).floatValue();
        
        LoanBeanRemote myLoanRemote = null;
        LoanBeanRemoteHome myLoanHome = null;
        
        
        InitialContext initContext = null;
        
        try
        {
            initContext = new InitialContext();
        }
        catch(Exception e)
        {
            out.println("First "+e.toString());
        }
        
        try
        {
            String JNDIName = "ejb/Loan";
            Object obj = initContext.lookup(JNDIName);
            myLoanHome = (LoanBeanRemoteHome)PortableRemoteObject.narrow(obj, LoanBeanRemoteHome.class);
        }
        catch(Exception e)
        {
            out.println("Second "+e);
        }
        
        try
        {
            myLoanRemote = myLoanHome.create();
        }
        catch(Exception e)
        {
            out.println("Third "+e);
        }
        
        float interest = myLoanRemote.calculateInterest(rate,time,amount);
        
        out.println("Interest: "+interest);
    }
}

index.html

ejb-jar.xml

<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar version="2.1" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd">
    <enterprise-beans>
        <session>
            <display-name>LoanBeanSB</display-name>
            <ejb-name>LoanBean</ejb-name>
            <home>ejb.LoanBeanRemoteHome</home>
            <remote>ejb.LoanBeanRemote</remote>
            <ejb-class>ejb.LoanBean</ejb-class>
            <session-type>Stateless</session-type>
            <transaction-type>Container</transaction-type>           
            </session>
        </enterprise-beans>
    <assembly-descriptor>
        <container-transaction>
            <method>
                <ejb-name>LoanBean</ejb-name>
                <method-name>*</method-name>
            </method>
            <trans-attribute>Required</trans-attribute>
        </container-transaction>
        </assembly-descriptor>
    </ejb-jar>

glassfish-web.xml

I am attaching a screenshot of the error I get. Please help me

help please

My problem is solved. There were few errors

1. <input type="text" accept="time"/> as you can see I have given the attribute "accept" except "name"
2. I had to remove the unnecessary white spaces using trim() method java when the data are submitted to the servlet
3. Had to replace the JNDI name with the correct one which is automatically assigned by the container. That name was in "glasfish-jar-xml.xml" (or something similar) file

Marking this thread as solved