Jboss4.0_Jsp_page_errorPage_exception problem

[nkkwok]

Related Files:

C:\jboss-4.0.0\server\default\deploy\jsp.war\Calculate2.html

<FORM METHOD=GET ACTION=Calculate2.jsp>
<INPUT TYPE=TEXT NAME=Value1><BR>
<INPUT TYPE=TEXT NAME=Value2><BR>
<INPUT TYPE=SUBMIT VALUE=Calculate>
</FORM>

C:\jboss-4.0.0\server\default\deploy\jsp.war\Calculate2.jsp

<%@ page errorPage="Calculate2Error.jsp" %>
<%! private String v1;
 private String v2; %>
<% v1 = request.getParameter("Value1");
 v2 = request.getParameter("Value2"); %>
The sum of <%= v1 %> and <%= v2 %> is
<%= Integer.parseInt(v1) + Integer.parseInt(v2) %>

C:\jboss-4.0.0\server\default\deploy\jsp.war\Calculate2Error.jsp

<%@ page isErrorPage="true" %>
Calculate2Error.jsp reported the following error:
<I><%= exception %></I>.
<P><A HREF="Calculate2.html">Click here to try again</A>

My problem:

One of the response of the above codes are like this:
When the calculate2html file is displayed on the browser,
suppose when not entering any value or non-integer value
in the input box, the Calculate2Error.jsp will be called via
Calculate2.jsp to display exception error
message: java.lang.NumberFormatException: null
or any wrong input like:abcd

But we I do so, I got the following error reported:

ERROR:
Condition: When not puting value on Value1 text box.......as shown:

http://localhost:8080/jsp/Calculate2.jsp?Value1=&Value2=6

Result: The page cannot be displayed
HTTP 500 - Internal server error
Internet Explorer

Please advise why such problem occurs or any idea on the possible cause of it.

Information of my PC:-

-------Operating system used: Window professional XP sp1 (English)

--------System >> Environment Variables >> User variables
ANT_HOME: C:\apache-ant-1.6.2
JAVA_Home: c:\Program Files\Java\jdk1.5.0_01
JBOSS_HOME: C:\jboss-4.0.0
path: C:\Program Files\Java\jdk1.5.0_01\bin;C:\apache-ant-1.6.2\bin

--------System >> Environment Variables >> System variables
OS Windows_NT
Path: %SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;
C:\Program Files\Common Files\Adaptec Shared\System;
C:\Program Files\Microsoft SQL Server\80\Tools\Binn\;
C:\Program Files\Java\jdk1.5.0_01\bin
PATHEXT:.COM; .EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH

[nkkwok]

Problem solved.

The solution is just go to IE internet explorer >> Tools >> Internet option >> advanced >> Browsing >>uncheck >> show friendly HTTP error messages.

Thanks.