Clicking on a t:selectBooleanCheckBox gives exception

Question

hi ,
I need some help with the jsf h:selectBooleanCheckBox. My scenario is i have a link in my t:dataTable header . so whenever i click on that link a popup shows up with a list of checkboxes . whenever i click on any of those checkboxes in the popup and click submit button the user should be navigated to the main page generating a new column for that checkbox value. I get a null pointer exception when i click on those checkboxes and hit submit. This is how i am implementing the logic. This logic works for me when the checkboxes and on the jsp instead of a popup. Please help.
code in my jsp
<h:outputLink styleClass="tips" value="#AGselectPopup" rel="#AGselectPopup" title="Select Access Groups For This View"><t:outputText value="Access Groups..." />
My popup div
<h2 class="accessibility">Show only: Access Groups</h2>
<div class="noDisplay" id="AGselectPopup">
          <h:form styleClass="radioCheckGroup" >     
           <h:panelGroup>
                        <fieldset id="popupAGs">
               <legend class="accessibility">All Access Groups for this company</legend>
                  <t:dataList id="row" var="ag" layout="unorderedList"
                             value="#{manageuserscontroller.popupAGList}" >
                          <t:selectBooleanCheckbox id="checkbox3" value="#{manageuserscontroller.selectedAGIds[ag.accessGroupID]}" rendered="#{ag.accessGroupID!= manageuserscontroller.accessGroupID}"/>
                          <t:outputText style="font-weight:bold;" id="text2" value="#{ag.name}" /><t:outputText value="(default)" rendered="#{ag.accessGroupID== manageuserscontroller.accessGroupID}" />
                         </t:dataList>
              </fieldset>
          <div class="clr"><!-- --></div>
      </h:panelGroup>     
       <f:verbatim> <br /> </f:verbatim>
<t:saveState value="#{manageuserscontroller.accessGroupID}" />Backing bean code
private Map<Integer, Boolean> selectedAGIds = new HashMap<Integer, Boolean>();
   public void getSelectedAGItems(ActionEvent event) {
        // Get selected items.
      System.out.println("Inside selected AG Items method");
      System.out.println("Access group ID in selected AGItems method" + accessGroupID);     
     System.out.println("Selected AG list" + popupAGList);     
     selectedAGList = new ArrayList<AccessGroup>();
      for (AccessGroup accgrp : popupAGList) {
            System.out.println("inside for loop");
            int x = accgrp.getAccessGroupID();
            System.out.println("accessgroupid" + x);
     *if (selectedAGIds.get(x).booleanValue()) {*
                selectedAGList.add(accgrp);
                System.out.println("OK-user added to selected AG list");
                System.out.println("Accessgroup id" + accgrp.getAccessGroupID());
                System.out.println("Accessgroup name" + accgrp.getName());
           else
                System.out.println("Accessgroup not selected");
      }I get the nullpointer exception at this line if (selectedAGIds.get(x).booleanValue())
Please someone help when since i am struck with this and cann't go ahead with my task
Thank You so much in advance

Answer 1

You can try these steps in case of issues with web pages:
You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.
*Hold down the Shift key and left-click the Reload button
*Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
*Press "Command + Shift + R" (Mac)
Clear the cache and remove cookies only from websites that cause problems.
"Clear the Cache":
*Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"
"Remove Cookies" from sites causing problems:
*Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"
Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.
*Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
*Do NOT click the Reset button on the Safe Mode start window
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes