Subject: RE: CLASSPATH, .jar files, packages, and so forth 2007-11-01 - By Mann, Ivan H
Back
Oops. I mistyped one item. Everything is in webapps/<appl>.
By now it doesn't matter, because it is working.
Thanks to whomever it was that provided the example.
Ivan Mann
-- --Original Message-- --
From: Christopher Schultz [mailto:chris@(protected)]
Sent: Thursday, November 01, 2007 12:18 PM
To: Tomcat Users List
Subject: Re: CLASSPATH, .jar files, packages, and so forth
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Ivan,
Mann, Ivan H wrote:
> Not being able to find the class may mean that it can't find the jar
> file and it may mean that it can find the jar file but the package and
> or directory is not done right.
Probably.
> The applet specified here appears in the web browser just fine.
> <applet codebase="." code="applet/DDSMenu.class"
> archive="schedule.jar"
> width`0
> height00>
> </applet>
Okay: that means that the JAR file itself is being loaded properly
(unless you happen to have class files laying around in the webapp's
deployment directory, outside of WEB-INF: make sure you aren't doing
that; I'm pretty sure that archive="...." indicates that all code should
come from the specified JAR and classes will not be requested from the
server directly).
> The
> applet tries to access the BuildSchedule class in response to a menu
> item and the exception is not thrown until then.
>
> java.lang.NoClassDefFoundError: applet/schedule/BuildSchedule
What do you get when you run:
$ unzip -v webapps/schedule.jar
> The jar file is located in .../webapps/schedule.jar, which is where
> the applet directory in the cod parameter is.
Unless you have written this incorrectly, scheduler.jar shouldn't be in
"webapps/scheduler.jar"... it should be in
webapps/[yourappname]/scheduler.jar. And your applet tag should look
like this:
<applet archive="<%= request.getContextPath() %>/scheduler.jar"
...since your JAR file is in the web root. If you relocate the page, you
want your URLs to work properly. Fully-qualified URLs always work
better.
- -chris
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