Just take a look at line 124 of the generated servlet (FamilyMain$jsp.java)
mentioned in the stack trace. This file will be under the work directory.
Look for code calling a method on an object, which in this error condition
happens to be null.
HTH,
-Jeff
Eddie Liang
<eliang@edge. To: "'Tomcat Users List'"
<[EMAIL PROTECTED]>
com> cc:
Subject: java.lang.NullPointerException
10/23/02
08:49 AM
Please
respond to
"Tomcat Users
List"
Hi,
I use the JSP, tomcat 4.0.4 to call a java bean class, I got the below
error. Does anybody know what is wrong?
Thank you very much.
java.lang.NullPointerException
at
org.apache.jsp.FamilyMain$jsp._jspService(FamilyMain$jsp.java:124)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.ja
va:201)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:243)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:190)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2
46)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
Here is my JSP source code:
<!-- Developed and Documented by Krishna Veeramachaneni -->
<html>
<head>
<title>IMEDGE Content Management Services Administrator</title>
<link href="/JSP/com/imedge/admin/style.css" rel="stylesheet"
type="text/css" >
</head>
<jsp:useBean id="dbbean" class="com.imedge.admin.IMDbFamilyBean" >
</jsp:useBean>
<%
/* Java code to retrieve family name and description if any */
int i = 0;
String familyName = "BRACView";
String familyDesc = "The default text goes here";
String[] AllFamilyName = (String[]) dbbean.getAllFamilyName();
%>
<body link="#990000" vlink="#009999" alink="#009999"
ID="Bdy" leftmargin="0" rightmargin="0" topmargin="0" bgcolor="beige" >
<%@ include file="/JSP/com/imedge/admin/Banner.jsp" %>
<%@ include file="/JSP/com/imedge/admin/FamilyMenu.jsp"%>
<table width="100%" height="100%" cellpadding="0" cellspacing="0">
<tr >
<td class="leftFrame" bgcolor="beige" color="black"
valign="top" width=180 >
<h4> <img align="absmiddle"
src="/JSP/com/imedge/admin/images/familysmall.gif" > Family </h4>
<form name="add_form">
<input class="submitStyle" name="family_create"
type="reset" value="Add + "
onClick="self.location.href='/JSP/com/imedge/admin/CreateFamily.jsp';">
</form>
<div class="marginStyle" >
<% for (i=0; i< AllFamilyName.length; i++) {
if (AllFamilyName[i] != null ) {%>
<b> <font color=white> <a
href="/JSP/com/imedge/admin/EditFamily.jsp?familyname=<%= AllFamilyName[i]
%>"><%= AllFamilyName[i] %> </a> </font><BR> <BR>
<% }
} %>
</div>
</td>
<td valign="top" align="left" class="rightFrame" >
<table width="97%" >
<tr>
<td >
<div class="mesg">
Click Add to add a family. Click a
family name to edit or delete the family.
</div>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
Eddie Liang
Database Architect
Phone: 630-810-9669 x253
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