java.security.AccessControlException: access denied (java.io.FilePermission background.jpg read)

[clowtown]

I am extremely new to java and this is the first I've worked with
applets, so any help will be appreciated but I stress that I am new but
very capable. I have looked on many message boards but I don't
understand most of what they are talking of. I have written a simple
Breakout game and would like to put it on a web page. However, when I
load the web page I get an error that the applet failed to load and
here is the message:

java.security.AccessControlException: access denied
(java.io.FilePermission background.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 javax.swing.ImageIcon.<init>(Unknown Source)
at javax.swing.ImageIcon.<init>(Unknown Source)
at GraphicsPanel.loadImageFromFile(GraphicsPanel.java:34)
at GraphicsPanel.<init>(GraphicsPanel.java:23)
at Breakout.<init>(Breakout.java:111)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown
Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(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.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

[clowtown]

[Andrew Thompson]

On 7 Dec 2004 14:06:19 -0800, clowtown wrote:

> I am extremely new to java and this is the first I've worked with
> applets,

That is a bad combination.
<http://www.physci.org/codes/javafaq.jsp#appfirst>

>..so any help will be appreciated but I stress that I am new but
> very capable.

I would not determine a person to be 'very capable' if
they were not able to solve a straightforward error from
a stacktrace.

>..I have looked on many message boards but I don't

> understand most of what they are talking of. I have written a simple
> Breakout game and would like to put it on a web page.

URL?

>..However, when I

> load the web page I get an error that the applet failed to load and
> here is the message:
>
> java.security.AccessControlException: access denied
> (java.io.FilePermission background.jpg read)

...
> at GraphicsPanel.loadImageFromFile(GraphicsPanel.java:34)

At line number 34 of the loadImagFromFile method of GraphicsPanel,
you are attemtping to use a File object[1]. You are not allowed to
do that in an unsigned applet[2]. Use an URL instead[3].

[1] <http://www.physci.org/codes/javafaq.jsp#exact>
[2] <http://www.physci.org/codes/javafaq.jsp#security>
[3] <http://www.physci.org/codes/javafaq.jsp#path>

BTW - please refrain from x-posting[4] between c.l.j.programmer and
c.l.j.help. Follow-ups set to c.l.j.help.

[4] <http://www.physci.org/codes/javafaq.jsp#xpost>

--
Andrew Thompson
http://www.PhySci.org/codes/ Web & IT Help
http://www.PhySci.org/ Open-source software suite
http://www.1point1C.org/ Science & Technology
http://www.LensEscapes.com/ Images that escape the mundane