Caused by: java.lang.SecurityException: class "Test$1" does not match trust level of

[catdude]

I'm attempting to write a file chooser applet. I'm sort of aware of the security concerns and am trying to figure out how to work through it.

The error I'm getting now when I try to access the applet through my web browser reads:
Caused by: java.lang.SecurityException: class "Test$1" does not match trust level of other classes in the same package

The Java source I'm working with can be found at java Expert Solutions: File Chooser Java applet code example

My platform is:
Ubuntu Linux, 32 bit, javac 1.6.0_22
java version "1.6.0_22"
OpenJDK Runtime Environment (IcedTea6 1.10.2) (6b22-1.10.2-0ubuntu1~11.04.1)
OpenJDK Client VM (build 20.0-b11, mixed mode, sharing)

Complete Java console output:
FileApplet.init() : Applet loaded
FileApplet.init() : Changing sandbox security
java.lang.reflect.InvocationTargetException
at com.sun.deploy.util.DeployAWTUtil.invokeAndWait(Un known Source)
at sun.plugin2.applet.Plugin2Manager.runOnEDT(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.SecurityException: class "Test$1" does not match trust level of other classes in the same package
at com.sun.deploy.security.CPCallbackHandler$ChildEle ment.checkResource(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.checkResourc e(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(U nknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Un known Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at Test.<init>(Test.java:18)
at sun.reflect.NativeConstructorAccessorImpl.newInsta nce0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInsta nce(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newI nstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(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.doIntersectio nPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilter s(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(U nknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Exception: java.lang.reflect.InvocationTargetException

[Norm]

The code at that site was not a java applet (it does not extend the Applet class).
It looks like a desktop application (it extends JFrame).

Is your problem an OS related thing?

[catdude]

Oops!

No, I suspect it's a Java-newbie thing :) I'm a lot more comfortable programming in c, Perl, Python, or shell script than I am in Java. I didn't even notice that the sample code wasn't written as an applet.

Back to the drawing board! And thanks for pointing that out to me.