Applet AccessControlException access denied

Question

I am trying to reference JLayer.

<applet
code="AppStart.class"
height="480"
width="640"
archive="jl1.0.jar, AnApplet.jar"
</applet>

I keep getting this error on the console

Exception in thread "pool-1-thread-1" java.security.AccessControlException: 
  access denied ("java.lang.RuntimePermission" "modifyThreadGroup")
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at sun.plugin2.applet.SecurityManagerHelper.checkAccessHelper(Unknown Source)
at sun.plugin2.applet.AWTAppletSecurityManager.checkAccess(Unknown Source)
at java.lang.ThreadGroup.checkAccess(Unknown Source)
at java.lang.Thread.init(Unknown Source)
at java.lang.Thread.<init>(Unknown Source)
at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.<init>(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.addWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.processWorkerExit(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Any help?

This is the first time I am using a referenced jar. My other applets work fine.

This is JLayer the audio library, not `javax.swing.JLayer`, right? — Tom Hawtin - tackline, Feb 01 '13 at 21:16

score -1 · Answer 1 · answered Feb 01 '13 at 05:47

-1

The referenced jar isn't signed and it is trying to create a thread, which isn't allowed in unsigned jars in applets.

Sign it.

answered Feb 01 '13 at 05:47

user207421

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Eh? You can create threads for unsigned code (within your own thread groups). – Tom Hawtin - tackline Feb 01 '13 at 21:00
@TomHawtin-tackline Eh? The stack trace seems perfectly clear to me. Your comment doesn't. – user207421 Feb 01 '13 at 21:03
Really, unsigned applets have been creating threads since JDK 1.00. – Tom Hawtin - tackline Feb 01 '13 at 21:14

Applet AccessControlException access denied

1 Answers1