Mega Code Archive
This scriptlet checks a hidden field to see whether or not to throw an exception
<![CDATA[
<%-- This scriptlet checks a hidden field to see whether or not to throw an exception --%>
<%
String hiddenField = request.getParameter("hiddenValue");
if ( hiddenField == null || hiddenField.equals(""))
throw new java.lang.NullPointerException();
%>
<HTML>
<HEAD><TITLE>Generate Error</TITLE></HEAD>
<BODY>
This page generates an error when you click the button.<P>
<FORM METHOD="POST" ACTION="generateErrorNoHandler.jsp">
<INPUT TYPE="HIDDEN" NAME="hiddenValue" VALUE="Bang!">
<INPUT TYPE="SUBMIT" VALUE="Generate exception!">
</FORM>
</BODY>
</HTML>
]]>