Unable to view Applets due to class not found error. Urgent

We are currently facing issues in our upgrade to Java JRE 1.6 & above from JRE 1.4 on displaying certain information. Our applets are built in a way like at runtime it will access certain jar files ( tibco jar files) and use them to parse the incoming messages. The following will give a summary of the issue.
We were using Jre 1.4 in our systems previously. With JRE 1.4, we have a system where we use java applets to display data over the network in the websites. The java applets will use a jar file (TIBRVJ.jar file available in C:\TIBCO\TIBRV\8.3\LIB\) folder. The way we facilitate this is by including –cp “C:\TIBCO\TIBRV\8.3\LIB\TIBRVJ.JAR in the Java runtime parameter settings. However post upgrade to JRE 1.6, we are getting errors in our systems due to the upgrade as specified below. the only way we are able to avoid this issue is by placing the Jar file in JRE/lib/ext folder. it also requires changes in our Java.policy file to provide access to this.
Error Codes
‘java.lang.NoClassDefFoundError: com/tibco/tibrv/TibrvMsgCallback”
We would like to know why the tibrv. jar file is not picked from the classpath set on the Java Runtime Parameters, but being picked only after placing it in the ext/bin directory and changing Java policy files in JRE 1.6 and higher versions.

Hi Can anyone please share your views on this issue.

Similar Messages

Class not found error for applet.

This is probally a really simple mistake but I've tried everything and can't find it.
My applet works fine with applet viewer - I'm running it from JBuilder. But when I open my html file in the browser it gives me a 'Class not found' error. I've tried running other applets (my own and demos on this site) and they work fine.This is the applet tag code:
<applet code = "Rotary.class" width = "650" height = "580" align = "top">

<param name = "sector0" value ="234,215,244,207,154,43,125,63">
</applet>
The class file is in the same directory as the HTML file. Do I need to specify the codebase? I tried that too - giving it the full pathname of the class.
In the Java console it said that it couldn't find "C:Project\Rotary\javax\swing\japplet"
I don't think it could have anything to do with the fact that I'm using swing because the other applets I used used swing.
Please help - I'm really running out of ideas here!

You have a similar problem like I had.
You seem to have a too old JAVA environment for the browser - I had a too new environment.
For all who are experiencing the same problem!
Problem:
You're compiling your applets with a quiet modern compiler (i.e. Netbeans Version 3.5.1)
You are able to compile your applets without any problems but if you try your applets in "real life", the browsers can't interpret your applets [class not found]. (I tested Internet Explorer 6.0 and Netscape Navigator 4.7)
So you need a plugin for the new JAVA environment because the JAVA environment of the browser is older than that which the applet needs.
Well, you have the choice to demand to every user of your applet to download the new Java Runtime Environment, but then don't wonder why nobody visits your site!
But, don't worry: I figuered out another solution, that Netbeans (www.netbeans.org) allows to compile in different JAVA versions.
Solution:
What you have to do is:
- Install a previous version of JDK (i.e. JDK 1.3 - I would suggest, lower versions don't work with Netbeans 3.5.1 and JDK 1.3 is enough for IE 6.0 and NN 4.7, which I tested)
- Go into the "bin"-directory of Netbeans (i.e. c:/netbeans3.5.1/bin)
- Open the file "ide.cfg" (with notepad or any other texteditor)
- You see a line like: jdkhome "C:\java\j2sdk1.4.2" -J-Xmx96m -J-Xss1024k -J-Xms24m -J-Xverify:none
- Change the path to your other JDK you wish, like: jdkhome "C:\java\jdk1.3" -J-Xmx96m -J-Xss1024k -J-Xms24m -J-Xverify:none
- That's it, you can compile your applets in a previous version of JAVA so that "older" browser user don't have to install a plugin for the new JAVA environment.
Have fun!
If you have any questions I would be pleased to help you.
If this tip helped you already I would be pleased if you would send me a quick email with your experience.
My email: [email protected]

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thanks in advance for any advise
owen

Hi,
you should be able to reference the JAR file from teh HTML tag. If not then this sounds like a bug that should be filed
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The error I get is as follows:
==============================
type Exception report
message Internal Server Error
description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated.
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D:\Apps\Apache\Tomcat4.0\work\Standalone\localhost\cartapp\handoff1$jsp.java:56: Class com.cartapp.user.User not found.
com.cartapp.user.User handoff = null;
^
An error occurred at line: 1 in the jsp file: /handoff1.jsp
Generated servlet error:
D:\Apps\Apache\Tomcat4.0\work\Standalone\localhost\cartapp\handoff1$jsp.java:59: Class com.cartapp.user.User not found.
handoff= (com.cartapp.user.User)
^
An error occurred at line: 1 in the jsp file: /handoff1.jsp
Generated servlet error:
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handoff = (com.cartapp.user.User) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "com.cartapp.user.User");
^
3 errors, 1 warning
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:285)
at org.apache.jasper.servlet.JspServlet.loadJSP(JspServlet.java:548)
=============================================
Location of files
==================
My jsp file is located at:
D:\Apps\Apache\Tomcat4.0\webapps\ROOT\cartapp
my bean class - User - is at:
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Contents of the jsp file
=======================
<jsp:useBean id="handoff" scope="session" class="com.cartapp.user.User" />
<HTML>
<BODY>
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<%
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%>
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The first 2 lines of the class are:
==================================
package com.cartapp.user;
public class User {
Environment settings
====================
JAVA_HOME=D:\Apps\java\jdk
CATALINA_HOME=D:\Apps\Apache\Tomcat4.0
CLASSPATH=;.;F:\ola\progmn\JAVA\pkgs;D:\Apps\Apache\Tomcat4.0\common\lib\servlet.jar
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Thanks.
Ola Oke (SCJP 1.4)

Not certain but try putting the classes folder in your classpath:
D:\Apps\Apache\Tomcat4.0\webapps\ROOT\WEB-INF\classes\

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Thanks in advance.
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I got the same error. I believe the ssl connection has a short timeout.
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java.lang.NoClassDefFoundError: org/apache/axis/AxisFault
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Noufal

Hi,
Verify the 3rd party class files names are correctly written in your program. Sometimes wrong case might be the reason.
bye for now
sat

Class not found error afer loading classes to oracle

hi i have loaded quite a few jars into oralce 11g databse
created a java stored function
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Edited by: learning_man on Mar 11, 2010 1:27 PM

Learning_man,
Obviously you need to learn how to ask a question.
There is nothing in your post other than 'It doesn't work. Why? Help"
without any specific example. Also you still fail to include a 4 digit version!!!
It is also the third or the fourth time you asked this very same question.
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An incorrect CLASSPATH probably is.
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"Class not found" error at runtime when ExternalLib DC is included in WD DC

Hi All,
I am getting "Class not found" exception at runtime when external library DC is included in Webdynpro DC.
I am following the below steps..
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Hi Balakrishna,
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Here im getting the error "class not found".
Thanks,
Shilpa.
Edited by: Shilpa KG on Jun 18, 2008 4:42 PM
Edited by: Shilpa KG on Jun 18, 2008 4:44 PM

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<?xml version="1.0" ?>
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WLS 7 SSL class not found error

Actually, I got the same error message to start the Node Manager. However, I don't
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"Pavel Smelkov" <[email protected]> wrote:
It looks like ClassNotFoundException happend when WLS tried to initialize
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but
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Pavel.
"Jeff Davis" <[email protected]> wrote in message
news:[email protected]...
I'm having difficulty configuring the SSL port to listen to httpsrequests. The error
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**** START OF CONSOLE LOG **** <Jul 1, 2002 5:07:21 PM PDT> <Notice><Management>
<141052> app tag removed 
</TD>
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<table width="720" border="0" cellspacing="0" cellpadding="0">
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Thanks for your responce ...
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xxxxxxxxxxxxx
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xxxxxxxxxxx
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xxxxxxxxxxxx
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thanks
Khanh

Thanks everyone for your input.
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Khanh

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Thanks
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Do you have used any other package then default package?
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Class Not Found Error Doesn't Make Sense

Possible answer to CNF Exception problems.
I have written a simple slide show applet that displays a sequence of jpgs. In order to make it work for the majority of people and older systems I used the AWT Applet rather than the JApplet framework.
I compiled it using the latest JDK 1.4.1, ran it using applet viewer and locally inside my web browser (IE 6.0) and it all worked fine.
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Hi.
Instead of using the old JDK you can also compile your code for a specific version with
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kelysar

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i noticed that when you "run" an html page with a java applet in it, jdeveloper (ver 9.0.3) doesn't really process the page but instead it runs your applet in an applet window. the applets i made don't have a problem running this way, but when i force jdeveloper to run them in a browser window (ie, by loading the webpage housing the applet as a frame in another page), i get "class <mypackagename.myclassname> not found" errors and the applet doesnt run. this only started after i installed then uninstalled the latest jdk from sun (since it caused problems with jdeveloper) and reverted to the jdk that came with jdev. i already tried adding to the classpath project settings the paths of both the package and the class itself but still it doesn't work.
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JDeveloper does this intentionally..
Here is more info on how JDev deals with Applets and
HTML pages.
JDeveloper 903's Documentation:
Top Level
Developing Java GUI Clients> Working with Applets

Unable to view Applets due to class not found error. Urgent

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