No class Exception Found - applet works not anywhere outside of the IDE

I have an applet that works perfectly in the netbeans IDE IDE, but does not work from the command prompt (I use windows) or from a browser. I've been hitting my head against the wall for a few days on this one. Here is the HTML code I use:

< applet width = "400" height = "525" code = "musicapplet.class" archive ="crypticgraffiti.jar" > "
< param name = "bgcolor" value = "ffffff" > < param name = 'fontcolor' value '000000' = >
< / Param > < / param > your browser is not Java compatible. < / applet >


Here is the structure of the contents of the jar file:

META-INF /.
META-INF/MANIFEST. MF
com /.
com/crypticgraffiti /.
com/crypticgraffiti/music/musicapplet
com/crypticgraffiti/music/GetNotes.class
com/crypticgraffiti/music/InstList.class
com/crypticgraffiti/music/Mode.class
com/crypticgraffiti/music/MusicCreator.class
com/crypticgraffiti/music/OctaveTransformer.class
com/crypticgraffiti/music/Phrase.class
musicapplet/MusicApplet$ playerThread.class
musicapplet/MusicApplet.class

(Musicapplet.class is the main class)

When I try to run from the command prompt, I get:

«Error: could not find or load the class main crypticgraffiti.» MusicApplet.

When I try to load via html:

«Basic: load: class musicapplet.class not found.»
load: class musicapplet.class not found.
java.lang.ClassNotFoundException: musicapplet.class
at sun.plugin2.applet.Applet2ClassLoader.findClass (unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0 (unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass (unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass (unknown Source)
at java.lang.ClassLoader.loadClass (unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode (unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet (unknown Source)
to sun.plugin2.applet.Plugin2Manager$ AppletExecutionRunnable.run (unknown Source)
at java.lang.Thread.run (unknown Source)
Exception: java.lang.ClassNotFoundException: musicapplet.class
' security: for access to the keys and the certificate in the Mozilla user profile: null.

I tried all possible variations for the item 'code' of the applet tag (mainclass, mainclass.class, package.mainclass.class, etc.). I also tried to compile with JDK 1.6, and that doesn't change. I tried clearing the cache for temporary files by using the java Control Panel settings and checked that my browser can execute other applets using JRE 6 and 7.

I tried a few ways to distribute the applet also: put all the class files in the folder with the html file, put the classes in a source folder in the same folder as the html file, and finally put a pot in the same folder as the html (which seems really simple) file.

Any help at all would be most appreciated! This applet is a very cool music and original creation of application that relies heavily on the API JFugue. It's a shame that I can't get it online for people to play with!

So many things that are probably bad or maybe wrong...
1. is not part of the specification of the applet tag.
2. the full qualified class name should be used (packagename. ClassName).
3. the class name is CaseSensitive.
4. the name of the class doesn't have the suffix ".class".
5 applets cannot be run outside of the browser from the command line.

If the above does not help, please tell us the exact URL that you use and the structure of what is on the web server (HTML page, jar location).

Tags: Java

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