Applet not running on MAC OS X

My applet works fine on windows but when my client run my applets on MAC OS Browser then it gives error on status bar like "Applet Not Loaded ".
So How can i solve this problem . helpful advice is appreciated.

The first advice given was the best advice you will get at this stage.
OTOH, the problem might be that the compilation options used on Windows were for a 1.6+ JRE, whereas the Mac is running a 1.5 JRE.
If that is the case, the relevant questions become..
How do you compile the applet (e.g. IDE, IDE with Ant build script, command line..)?
What SDK version are you using?
What compilation options are used (the important ones here are -source -target and -bootclasspath )?
What [java version|http://pscode.org/prop/?prop=java.version] is the Mac using?
Also note that many things* can be determined if you provide an URL to the applet.
* Especially if someone has a Mac and can report the error.

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Hi
I have created an applet that runs on any browser on Windows, and runs only as an application on Mac OS X. But when I try to run it as an applet on Mac OS X, it does not run. I have installed the latest Java from apple, and changed the preferences to run 1.6 Java on the browsers.
I get the following error:
MRJ Plugin for Mac OS X v1.0.1
[starting up Java Applet Security @ Tue Feb 03 11:34:26 EST 2009]
basic: Referencing classloader: sun.plugin.ClassLoaderInfo@c7980c, refcount=1
basic: Added progress listener: sun.plugin.util.GrayBoxPainter@36a1a1
basic: Loading applet/u2026
basic: Initializing applet/u2026
basic: Referencing classloader: sun.plugin.ClassLoaderInfo@c7980c, refcount=2
basic: Releasing classloader: sun.plugin.ClassLoaderInfo@c7980c, refcount=1
basic: httpCompression = true
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basic: Downloading http://192.168.2.50:8080/MCA_V3_1/Clientlib/lms-common.jar to cache
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security: Loading certificates from Deployment session certificate store
security: Loaded certificates from Deployment session certificate store
security: Checking if certificate is in Deployment session certificate store
security: User has granted the priviledges to the code for this session only
security: Adding certificate in Deployment session certificate store
security: Added certificate in Deployment session certificate store
security: Saving certificates in Deployment session certificate store
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java.lang.UnsupportedClassVersionError: Bad version number in .class file
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     at java.lang.ClassLoader.defineClass(ClassLoader.java:675)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:147)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
     at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:119)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
     at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:605)
     at sun.applet.AppletPanel.createApplet(AppletPanel.java:723)
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     at jep.AppletFramePanel.createApplet(AppletFramePanel.java:189)
     at sun.applet.AppletPanel.runLoader(AppletPanel.java:652)
     at sun.applet.AppletPanel.run(AppletPanel.java:326)
     at jep.AppletFramePanel.run(AppletFramePanel.java:176)
     at java.lang.Thread.run(Thread.java:613)
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     at java.security.AccessController.doPrivileged(Native Method)
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     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
     at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:605)
     at sun.applet.AppletPanel.createApplet(AppletPanel.java:723)
     at sun.plugin.AppletViewer.createApplet(AppletViewer.java:1864)
     at jep.AppletFramePanel.createApplet(AppletFramePanel.java:189)
     at sun.applet.AppletPanel.runLoader(AppletPanel.java:652)
     at sun.applet.AppletPanel.run(AppletPanel.java:326)
     at jep.AppletFramePanel.run(AppletFramePanel.java:176)
     at java.lang.Thread.run(Thread.java:613)
Any ideas how I can fix this?
Thanks,
GK

After doing some research, I still cannot fix this problem.
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When I run the applet on safari or firefox on Mac OS X, The console says running on Java 5. (Although the properties have been changed in Mac OS X /Utilities/Java Preferences)
I have been struggling with no end in site, for this issue.
I was able to get the Applet working by reverting to Java 5 and using the Java Swing jar from Java.net. But I still want to be able to just use Java 6 in Mac OS X. (I can't use the GUI Builder in netbeans with the separate swing jar).
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Hello everyone I have a problem that is bugging me.
in my pc at home i have operating system window xp i have oracle9i installed and also java and j2ee and version of internet explorer is 6.0
.there is no proble running html pages but the problem is the applet are not running in the broweser even the java demo from sun is not running
.when i try to run the applet a dialog box appears and shows this
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do i have a webserver that can be used by me for java program(adv java) or i have to get one .as i told you there is java1.3 and j2ee1_2_3
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let me remind you the applet not getting downloaded in the browser is a bigger problem for me.
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have a nice day bye.

1} The applet is not getting loaded in my internet
browser.Error messages? Are you sure your setup is correct? Search. "Applet not working" usually has only a small range of reasons, all well-covered here.
2}why the oracle page is displayed when i type
"http://localhost".
Maybe because you have some Oracle webserver?
3} Do i have any default webbrowser in my system.Yes. The one that opens when you double-click on an HTML page.
>
thanks.

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dear sir/madam,
i have an applet which uses java.awt.* and java.awt.event.* classes, is running in systems with J2SE installed. but it is not running in systems with java enabled browsers without J2SE installation.
i want my applet to be run in all java enabled browsers without J2SE also.
how to make my applet work.
thanks in advance.
-- ks_moses

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install JRE to run your Java Programs
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I can run any applet in appletviewer.
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I can not run even the demos that came with de SDK 1.4.1_01.
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Maybe is very obvious but I ca not see it.
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the hello.java file is:
import java.applet.Applet;
import java.awt.Graphics;
public class hello extends Applet {
StringBuffer buffer;
     public void init() {
     public void start() {
     public void stop() {
     public void destroy() {
     public void paint(Graphics g) {
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<html>
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Applet should be there
<br>
<applet code="hello.class" width=200 height=200>
No applet
</applet>
</body>
</html>
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If I modify the .html file acording to OBJECT tag specifications for Java Plug-In the same applet runs OK in the browser (IE5.0 ).
I forgot to tell that I have installed the last version of SDK j2sdk1.4.1_01
<html>
<body>
Applet should be there
<br>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 200 HEIGHT = 200 >
<PARAM NAME = CODE VALUE = "hello.class" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.1">
No applet
</OBJECT>
</body>
</html>
I think there is a problem with the JVM from Microsoft
Thank you,
Best regards,
ValeriuS

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Hi
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I am using Java Version 1.4
Settings for IE is as follows
Java (Sun)
CHECKED Use Java 2 v1.4.0 for <applet>
Microsoft VM
CHECKED Java console enabled
NOT CHECKED Java logging enabled
CHECKED JIT compiler for virtual machine enabled
The applet is running in Appletviewer and run in IE in some other machine. The problem is in my browser and Java versions.
If I start the applet in IE it is not showing even Jave Console (which is enabled).
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If you use HTML converter (converting the applet to object) it will work.
But the Optimal solution is compile your applet file with -target option.
e-g
javac target 1.1 HelloWorld.java
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I Thank you all for your solutions.
with love Vija

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2. Copy the certificate to your Mac.
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4. Restart your browser
But the client cannot be asked to do all this to run the applet.
Is this problem being solved by Mac in their java implementation or is there any other possible solution?
Thanx in advance.
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Charu

I am experiencing the same problem - I notice it does not happen on OS9.2 using IE but appears a problem on all browsers on OSX
Apple gave me the following reply.....
Re: Bug ID# 3268633: cannot load applet class under https connection
Hello Andrew,
Thank you for bringing this problem to our attention. We have received feedback
from engineering on your
reported issue.
Please know that to get Java to recognize the certificate you will need to do
one of two things, depending
on which VM you are using. Since you want it to work with Internet Explorer, we
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In Java 1.3.1 you'll need to add the certificate to
/Library/Java/Home/lib/security/cacerts using
/usr/bin/keytool to import the certificate into the certificate database.
In Java 1.4.1 you should be able to just add the certificate to the keychain
using certtool. For more
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<http://java.sun.com/j2se/1.4.1/docs/tooldocs/solaris/keytool.html>. After
doing so, if you should require
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assistance from Developer
Technical Support. This must be done by filing a Technical Support Incident.
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Applet not running(Error:error reading applets)

i write a very simple applet .it succesfully compile but on running thru command prompt(windowsxp) it gives error error reading applets

The first advice given was the best advice you will get at this stage.
OTOH, the problem might be that the compilation options used on Windows were for a 1.6+ JRE, whereas the Mac is running a 1.5 JRE.
If that is the case, the relevant questions become..
How do you compile the applet (e.g. IDE, IDE with Ant build script, command line..)?
What SDK version are you using?
What compilation options are used (the important ones here are -source -target and -bootclasspath )?
What [java version|http://pscode.org/prop/?prop=java.version] is the Mac using?
Also note that many things* can be determined if you provide an URL to the applet.
* Especially if someone has a Mac and can report the error.

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Hi
What is the reason why an applet will be running in appletviewer but not in a browser???

Hi,
Try out with this html file:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
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<script language="JavaScript">
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window.open("Login.html","LoginPage","toolbar=0,menubar=0,scrollbar=0,resizable=0,directories=0,width='110%',height='150%'");
</script>
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<body>
<blockquote>


<SCRIPT LANGUAGE="JavaScript"></SCRIPT>
<COMMENT><SCRIPT LANGUAGE="JavaScript1.1"></SCRIPT></COMMENT>
<SCRIPT LANGUAGE="JavaScript"></SCRIPT>
<APPLET CODE = "MyApplet.class" WIDTH = "110%" HEIGHT = "150%" ></XMP>
<PARAM NAME = CODE VALUE = "MyApplet.class" >
</APPLET>
</NOEMBED></EMBED></OBJECT></Center>

</body>
</html>
Hope this will help you.
Anil
Developer Technical Support
Sun Microsystems Inc,
http://www.sun.com/developers/support

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