Warning using DWR to populate list box

hi all,
iam trying to use DWR for populating list box wen a check box is checked.iam using Tomcat 4.1 & j2sdk 1.4.2
but iam getting an alert: illegal access to default constructor Aug 20, 2006 6:30:43 PM uk.ltd.getahead.dwr.util.CommonsLoggingOutput warn
WARNING: Method execution failed:
java.lang.InstantiationException: Illegal Access to default constructor
        at uk.ltd.getahead.dwr.create.NewCreator.getInstance(NewCreator.java:62)
        at uk.ltd.getahead.dwr.impl.ExecuteQuery.execute(ExecuteQuery.java:172)
        at uk.ltd.getahead.dwr.impl.DefaultExecProcessor.handle(DefaultExecProce
ssor.java:48)
        at uk.ltd.getahead.dwr.impl.DefaultProcessor.handle(DefaultProcessor.jav
a:81)
        at uk.ltd.getahead.dwr.AbstractDWRServlet.doPost(AbstractDWRServlet.java
:162)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:256)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:191)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:
2415)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:180)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatche
rValve.java:171)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:172)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:641)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:174)
        at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContex
t.invokeNext(StandardPipeline.java:643)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:480)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
        at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:22
3)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:594)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:392)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java
:565)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:619)
        at java.lang.Thread.run(Thread.java:534)
Aug 20, 2006 6:30:43 PM uk.ltd.getahead.dwr.util.CommonsLoggingOutput warn
WARNING: Erroring: id[53_1156078843109] message[uk.ltd.getahead.dwr.OutboundVari
able@497904]my code goes here,
package db;
import java.util.*;
class ArrayL
     public ArrayL()
          System.out.println("In constructor");
     public ArrayList getA(String x)
          ArrayList al=new ArrayList();
          al.add("1");
          al.add("6");
          al.add("42");
          al.add("16");
          al.add("3");
          System.out.println("al-------"+al);
          return al;
     public int[] getNumbers(boolean big)
        if (big)
            return new int[]
                1000, 2000, 3000, 4000
        else
            return new int[]
                1, 2, 3, 4, 5, 6, 7, 8, 9, 10
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN"
    "http://www.getahead.ltd.uk/dwr/dwr10.dtd">
<dwr>
<allow>
    <create creator="new" javascript="Demo" scope="session">
      <param name="class" value="uk.ltd.getahead.dwr.Demo"/>
    </create>
     <create creator="new" javascript="ArrayL" scope="session">
      <param name="class" value="db.ArrayL"/>
    </create>
</allow>
</dwr>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<script type='text/javascript'
    src='/ajax1/dwr/engine.js'></script>
<script type='text/javascript'
    src='/ajax1/dwr/interface/ArrayL.js'></script>
<script type='text/javascript'
    src='/ajax1/dwr/util.js'></script>
     <SCRIPT type='text/javascript'>
     
     </SCRIPT>
</HEAD>
<BODY>
<FORM NAME="countryform" ID="countryform" ACTION="doCountry" METHOD="POST">
    <SELECT name="continent" id="continent" onChange="continentSelected();">
      <OPTION VALUE="Africa">Africa</OPTION>
      <OPTION VALUE="America">America</OPTION>
      <OPTION VALUE="Asia">Asia</OPTION>
      <OPTION VALUE="Australia">Australia</OPTION>
      <OPTION VALUE="Europe">Europe</OPTION>
    </SELECT>
    <SELECT name="country" id="country">
    </SELECT>
</BODY>
</HTML>can any one help with this problem
Thank u in advance

I'm not sure if the code you display is 'Exactly' how it is written.
If it is:
1) The class needs to be public (i.e. public class ArrayL {.....})
2) In the code below, the value of searchexp is a string
var searchexp = $("continent").value;
ArrayL.getNumbers(searchexp, displayItems); but the function
public int[] getNumbers(boolean big) takes a boolean.
3) In the call DWRUtil.addOptions("country", data); 'data' isn't defined did you mean 'items'?
Finally in the statement that you have if (items.length == 0) I have found that does not work with Collections (at least Maps) returned from a method to DWR (as of 1.1.3).
Good luck

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CLEAR value.
value-key = '8'.
value-text = 'Table Type'.
APPEND value TO list.
CLEAR value.
value-key = '9'.
value-text = 'Class / Interface'.
APPEND value TO list.
CLEAR value.
value-key = '10'.
value-text = 'Type Group'.
APPEND value TO list.
CLEAR value.
value-key = '11'.
value-text = 'Domain'.
APPEND value TO list.
CLEAR value.
value-key = '12'.
value-text = 'Search Help'.
APPEND value TO list.
CLEAR value.
value-key = '13'.
value-text = 'Lock Object'.
APPEND value TO list.
CALL FUNCTION 'VRM_SET_VALUES'
    EXPORTING
      id              = name
      values          = list
    EXCEPTIONS
      id_illegal_name = 1
      OTHERS          = 2.
IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.

Warning using DWR to populate list box

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