JSP:Exception Handling

index.html
==========
<form action="process.jsp">
No1:<input type="text" name="n1" /><br/><br/>
No1:<input type="text" name="n2" /><br/><br/>
<input type="submit" value="divide"/>
</form>

process.jsp
===========

<%@ page errorPage="error.jsp" %>
<%
 
String num1=request.getParameter("n1");
String num2=request.getParameter("n2");
 
int a=Integer.parseInt(num1);
int b=Integer.parseInt(num2);
int c=a/b;
out.print("division of numbers is: "+c);
 
%>

error.jsp
==========
<%@ page isErrorPage="true" %>
 
<h3>Sorry an exception occured!</h3>
 
Exception is: <%= exception %>

web.xml
========

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
    <error-page>
  <exception-type>java.lang.Exception</exception-type>
  <location>/error.jsp</location>
  </error-page>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>
</web-app>