JSP does not display properly

[kmv]

this code in JSP doesn't work in jboss-5.0.0.GA-jdk6

<%@ page import="java.text.DecimalFormat" %>
<%DecimalFormat df = new DecimalFormat("0.00");%>
<%=df.format(2d/0d)%>

it shows only empty page, no exceptions

can you explain why?

[kmv]

page must contain ? (question mark), but it's empty and if it has other content on page, then it is lost too

[peterj]

Very interesting. I viewed the page source in the browser and have an empty page - not even the surrounding html tags! Same results with AS 5.0 and JDK 5.

With AS 4.2.3 and JDK 5, I get the expected "?". The page source includes the surrounding HTML tag with a lone '?' in the third line of the body.

Looking at the generated Java source for the JSP, the code to generate the page is the same, but the initialization code is slightly different - in 4.2.3 an annotation processor is declared but in 5.0 there is an instance manager.

can you explain why?

Perhaps it is telling you that you should not be using server-side scripts within a JSP and that you should switch to using servlets + JSP + JSTL! ;-)

[kmv]

probably problem is diffrent codes of ? (question mark)
DecimalFormat df = new DecimalFormat("0.00");
String test = df.format(2d/0d);
System.out.println((int)test.charAt(0));
System.out.println((int)"?".charAt(0));
output:
8734
63
first code does not processed properly, but why no exception.. just empty page and all content is lost..

[kmv]

same result with jboss-5.0.1.GA

[kmv]

same result with jboss-5.1.0.GA

[bondchan921]

yeah, we have the same result in jboss-5.1.0.GA, but works under jboss-4.2.3.GA and jboss-5.1.2.EAP

[bondchan921]

seems fixex later, anyone have the bugID or any workaround ?