Exception Errors on Web Start

Hi JavaRanchers,

I am trying to deploy a simple chat application using Java Web Start, the application being a JAR file invoked by a .jnlp link on an HTML page. The chain of events work flawlessly locally, but once installed on the Web server it gags and the Java Web Start manager coughs up the following:

java.security.AccessControlException: access denied (java.io.FilePermission images/DC.jpg read)

at java.security.AccessControlContext.checkPermission(Unknown Source)

at java.security.AccessController.checkPermission(Unknown Source)

at java.lang.SecurityManager.checkPermission(Unknown Source)

at java.lang.SecurityManager.checkRead(Unknown Source)

at sun.awt.SunToolkit.getImageFromHash(Unknown Source)

at sun.awt.SunToolkit.getImage(Unknown Source)

at com.domain.danzchat.ClientGUI.<init>(ClientGUI.java:43)

at com.domain.danzchat.sockets.client.DanzChatter.main(DanzChatter.java:35)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at com.sun.javaws.Launcher.executeApplication(Unknown Source)

at com.sun.javaws.Launcher.executeMainClass(Unknown Source)

at com.sun.javaws.Launcher.continueLaunch(Unknown Source)

at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)

at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)

at com.sun.javaws.Launcher.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

I�m admittedly quite green, but can anybody tell me why this is happening and what steps I need to take to correct it? Any advice will be greatly appreciated.

Regards,
Dan

Visit the following Link:-

http://www.vamphq.com/tutorial.html
This will solve ur problem.

Put the following tag in ur jnlp file :-
<security>
<all-permissions/>
</security>

then sign your jar file using jarsigner.

i think this will solve ur problem.

cheers.........
Sudhanshu

Thanks a million, Sudhanshu. Adding that <security> code to the .jnlp file and then signing the JAR made it work.