Calling all java gurus - i cant figure out what is wrong with my code

please can someone see why a null pointer exception is being thrown and how do i fix it?
my current code which throws the null pointer is as below - the key issues that i need some java expert to tell me about is
1. is the usage of resultSet ok in the way i'm doing it , i'm not able to look at the code in debug mode as don't have an IDE and don't know how to do a log4j setup. - i tried doing an out.println("Got........"); but servlet keeps on forwarding the request object to results.jsp even when i comment out the code. and recomplie and restart tomcat 4.1.
2. is the way i'm declaring the List object and the adding stuff to bean and then stuffing bean into list ok?
3. why is the List object null? although i know the query works fine - and that using the below original code where only one row of data was being retrieved and set into bean worked fine.
current code with problem in the List object:
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import javax.sql.*;
import javax.naming.InitialContext;
import javax.naming.Context;
import javax.naming.NamingException;
* This class is a servlet that searches for a Finder Aid.
* @author
public class FinderAidsSearchS extends HttpServlet {
   * This is the static initializer,
   * executed the first time this class is referred to.
   * It makes sure the JDBC pool driver is loaded.
   * This method examines an HTTP request and searches for the
   * specified Finder Aid record in the database. It then redirects
   * the response to the <tt>Results.jsp</tt> JSP page.
  public void service(HttpServletRequest req, HttpServletResponse res)
       throws IOException
    HttpSession session = req.getSession(true);
//PrintWriter out = res.getWriter( );
//out.println("A Servlet Example");
    String year   = req.getParameter("Year");
    String year_range      = req.getParameter("Year_Range");
    String county          = req.getParameter("County");
    Connection conn = null;
    try {
//example code from tomcatmanual
Context initContext = new InitialContext();
Context envContext  = (Context)initContext.lookup("java:/comp/env");
DataSource ds = (DataSource)envContext.lookup("jdbc/rosDS");
conn = ds.getConnection();
          Statement stmt = conn.createStatement();
      String select = "select * from abridgment where " +
                      "(a_county = '" + county +
                      "' AND a_year_date = " + year +
out.println("<DEBUG> <select> the select staement is : " + select);
      ResultSet resultSet = stmt.getResultSet();
     Results abridgeresults = new Results();
     Abridgment varabridgment = null;
      int nRows = 0;
           varabridgment = new Abridgment();
       // out.println("varabridgment - attributes are:");
          //out.println("varabridgment - attributes are:" +varabridgment.geta_sub_year_volume());
          //out.println("varabridgment - attributes are:"+resultSet.getInt("a_sub_year_volume"));
          //trying to use vector construct
      //session.setAttribute("results", abridgeresults);
//      String sURL = res.encodeRedirectURL("/rossearch/results.jsp");
//TEMPCOMM        res.sendRedirect(sURL);
req.getRequestDispatcher("/rossearch/results.jsp").forward(req, res);
      catch(Exception e){
        System.err.println("Exception: FinderAidsSearchS.service: " + e);
    catch (Exception e) {
      System.err.println("Exception: FinderAidsSearchS.service: " + e);
original code that worked fine - for one test row retrieved by query
  public void service(HttpServletRequest req, HttpServletResponse res)
       throws IOException
    HttpSession session = req.getSession(true);
PrintWriter out = res.getWriter( );
out.println("A Servlet Example");
out.println("Using servlets");
   // if (! checkParams(req, res))
   //      return;
    String year   = req.getParameter("Year");
    String year_range      = req.getParameter("Year_Range");
    String county          = req.getParameter("County");
    Connection conn = null;
    try {
//example code from tomcatmanual
Context initContext = new InitialContext();
Context envContext  = (Context)initContext.lookup("java:/comp/env");
DataSource ds = (DataSource)envContext.lookup("jdbc/rosDS");
conn = ds.getConnection();
      Statement stmt = conn.createStatement();
      String select = "select * from abridgment where " +
                      "(a_county = '" + county +
                      "' AND a_year_date = " + year +
out.println("<DEBUG> <select> the select staement is : " + select);
      ResultSet resultSet = stmt.getResultSet();
      Abridgment abridgment = new Abridgment();
    //  abridgment.a_sub_year_volume        = Long.parseLong(c_phone);
      if ({
        session.setAttribute("isNewAbridgment", new Boolean(false));
        session.setAttribute("isNewAbridgment", new Boolean(true));
        out.println("<DEBUG> <AbridgmentSearchS-service> Abridgment not found: " + abridgment);
      session.setAttribute("abridgment", abridgment);
      String sURL = res.encodeRedirectURL("/rossearch/results.jsp");
      catch(Exception e){
        System.err.println("Exception: FinderAidsSearchS.service: " + e);
    catch (Exception e) {
      System.err.println("Exception: FinderAidsSearchS.service: " + e);
exception being thrown is:
2005-11-07 02:45:20 StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception
     at org.apache.jasper.servlet.JspServletWrapper.service(
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(
     at org.apache.jasper.servlet.JspServlet.service(
     at javax.servlet.http.HttpServlet.service(
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(
     at org.apache.catalina.core.StandardWrapperValve.invoke(
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(
     at org.apache.catalina.core.StandardPipeline.invoke(
     at org.apache.catalina.core.ContainerBase.invoke(
     at org.apache.catalina.core.StandardContextValve.invoke(
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(
     at org.apache.catalina.core.StandardPipeline.invoke(
     at org.apache.catalina.core.ContainerBase.invoke(
     at org.apache.catalina.core.StandardContext.invoke(
     at org.apache.catalina.core.StandardHostValve.invoke(
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(
     at org.apache.catalina.valves.ErrorReportValve.invoke(
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(
     at org.apache.catalina.core.StandardPipeline.invoke(
     at org.apache.catalina.core.ContainerBase.invoke(
     at org.apache.catalina.core.StandardEngineValve.invoke(
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(
     at org.apache.catalina.core.StandardPipeline.invoke(
     at org.apache.catalina.core.ContainerBase.invoke(
     at org.apache.coyote.tomcat4.CoyoteAdapter.service(
     at org.apache.coyote.http11.Http11Processor.process(
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(
     at org.apache.tomcat.util.threads.ThreadPool$
----- Root Cause -----
     at org.apache.jsp.results_jsp._jspService(
     at org.apache.jasper.runtime.HttpJspBase.service(
     at javax.servlet.http.HttpServlet.service(
     at org.apache.jasper.servlet.JspServletWrapper.service(
the problem line in the is:
for (int i = 0; i < myAbridgments.size(); i++) in a scriptlet in the jsp to retrieve the List of beans and go through each one as follows:
<% List myAbridgments = (List) request.getAttribute("results");
for (int i = 0; i < myAbridgments.size(); i++) {
                abridgment = (Abridgment) myAbridgments.get(i);
%>ok then all wanabe java experts lets see who is the first and best at resolving this one!
i have 10 points on offer - and a HUGE AMOUNT of graditude and appreciation for any one who can help me resolve this - Thanks.

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  • I can't figure out what's wrong with this code

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    Three four shut the door
    Five six pick up sticks
    Seven eight lay them straight
    Nine ten this is the end.
    The error message i got was an illegal start of expression. I can't figure out why it is giving me this error because i have if (n = 1) || (n = 2) statements. My code is:
    public class PoemSeventeen
    public static void main(String[] args)
    EasyReader console = new EasyReader();
    System.out.println("Enter a number for the poem (0 to quit): ");
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    System.out.println("One, two, buckle your shoe");
    else if (n = 3) || (n = 4)
    System.out.println("Three, four, shut the door");
    else if (n = 5) || (n = 6)
    System.out.println("Five, six, pick up sticks");
    else if (n = 7) || (n = 8)
    System.out.println("Seven, eight, lay them straight");
    else if (n = 9) || (n = 10)
    System.out.println("Nine, ten, this is the end");
    else if (n = 0)
    System.out.println("You may exit now");
    System.out.println("Put in a number between 0 and 10");
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    // package;
    * @author Gary Litvin
    * @version 1.2, 5/30/02
    * Written as part of
    * <i>Java Methods: An Introduction to Object-Oriented Programming</i>
    * (Skylight Publishing 2001, ISBN 0-9654853-7-4)
    * and
    * <i>Java Methods AB: Data Structures</i>
    * (Skylight Publishing 2003, ISBN 0-9654853-1-5)
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    * =======
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    * String fileName = console.readLine();
    * EasyReader inFile = new EasyReader(fileName);
    * if (inFile.bad())
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    * System.exit(1);
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    * if (!inFile.eof()) // or: if (firstLine != null)
    * System.out.println("The first line is : " + firstLine);
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    * int maxCount = console.readInt();
    * int k, count = 0;
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    * k = inFile.readInt();
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    protected BufferedReader myInFile;
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    protected static final int CLOSEERROR = 0x0002;
    protected static final int READERROR = 0x0004;
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    myErrorFlags |= OPENERROR;
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    myErrorFlags |= EOF;
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    int count = 0;
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    catch (IOException e)
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    System.err.println("Error reading " + myFileName + "\n");
    myErrorFlags |= READERROR;
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    * Reads the next integer (without validating its format)
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    * Reads the next double (without validating its format)
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    Can anybody please tell me what's wrong with this code? Thanks

    String[] message = {
        "One, two, buckle your shoe",
        "One, two, buckle your shoe",
        "Three, four, shut the door",
        "Three, four, shut the door",
        "Five, six, pick up sticks",
        "Five, six, pick up sticks",
        "Seven, eight, lay them straight",
        "Seven, eight, lay them straight",
        "Nine, ten, this is the end",
        "Nine, ten, this is the end"

  • Need help figuring out what's wrong with my code!

    I am having a few problems with my code and can't see what I've done wrong. Here are my issues:
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    Edited by: Jeaneene on May 25, 2008 11:54 AM

    From []:
    Post once and in the right area: Multiple postings are allowed, but they make the category lists longer and create more email traffic for developers who have placed watches on multiple categories. Because of this, duplicate posts are considered a waste of time and an annoyance to many community members, that is, the people who might help you.

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              } catch (IOException e) {
                   // TODO Auto-generated catch block
              i = Integer.parseInt(str);
              return i;
         }// end readInt
    }//end inputClass

    Start by looking at line 15 of the ToArrayList class. That's where you are trying to use a variable which is still null. And don't fuss about making it "more efficient", it doesn't even work yet.

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    We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place. <br/> Click <a
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