[taskforce141]

I made a video game applet in Java and I am now in the process of putting it on a web page. It can work as a simple html document using the jar file on anyone's computer, but when embedding it into a web page, I get the following error.

java.lang.RuntimeException: java.lang.NoClassDefFoundError: Level1
	at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
	at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: Level1
	at java.lang.Class.getDeclaredConstructors0(Native Method)
	at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
	at java.lang.Class.getConstructor0(Unknown Source)
	at java.lang.Class.newInstance0(Unknown Source)
	at java.lang.Class.newInstance(Unknown Source)
	at sun.plugin2.applet.Plugin2Manager$12.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: Level1
	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)
	... 20 more
Exception: java.lang.RuntimeException: java.lang.NoClassDefFoundError: Level1

The code I am using for the html document follows...

<applet archive="testing.jar" width=1200 height=700 code="planeGame.class" />

Does anyone have an ideas as to why I am getting this error or how to fix? Thanks in advance to anyone who responds.

This post has been edited by taskforce141: 29 December 2011 - 02:10 PM

[g00se]

Make sure you've packaged the class 'Level1' inside testing.jar

[taskforce141]

That is something I haven't had too much practice with. Can you explain how would I do what you recommended?

[g00se]

Are you using Windows? If so, first check if the class is there by listing the jar at the command line:

jar tf testing.jar | find "Level1"

[taskforce141]

I typed in this command, but I got a response saying
"'Jar' is not recognized as an internal or external command, operable program or batch file.

[mi14chal]

Did you add path with jdk to system path?

[g00se]

You need a JDK installed and as has been mentioned, its bin directory needs to be on PATH. See Windows Help on 'Environment Variable'

[Ghlavac]

taskforce141, on 29 December 2011 - 09:42 PM, said:

That is something I haven't had too much practice with. Can you explain how would I do what you recommended?

Depends what IDE you use, most of them have an 'export' as jar function or something of the likes that usually automatically does this stuff for you.

[g00se]

If it's a question of having missed just the odd class, the following approach will work (assuming no package)

jar uvf testing.jar Level1.class

[taskforce141]

Sorry I haven't responded in a couple of days, but after downloading software that allows me to open and see the contents of the jar file, I can see that "Level1" is in there. Now, how would I package this though as mentioned before?

[taskforce141]

I was researching on this error for a while and I am thinking it might have to do with the fact that I also have a class called Level1$1.class in the jar. Could this be correct?

[g00se]

Please post the jar listing