Hi!
Don't want to offend you, but if you would have a look at
the Java Homepage, you can find a nice tutorial about
security.......
http://java.sun.com/docs/books/tutorial/security1.2/index.html
Cheers, Thomas
Vladimir Olenin schrieb:
>
> Please, if anybody knows where can i get information about editing
> java.home/jre/lib/security/java.policy file, let me know immediatly. It
> is very urgent. Possibly someone out there knows what lines should be
> written in this file if i got the following errors while running applet:
>
> - while trying to load a Texture from file:
> --------------------------------
> java.lang.NullPointerException
> at
> com.sun.j3d.utils.image.TextureLoader.getTexture(TextureLoader.java:342)
> at ColumnScene.<init>(ColumnScene.java:70)
> at ExClip.buildScene(ExClip.java:98)
> at Example.buildUniverse(Example.java:296)
> at Example.init(Example.java:100)
> at sun.applet.AppletPanel.run(AppletPanel.java:357)
> at java.lang.Thread.run(Thread.java:479)
> ---------------------------------
>
> In TextureLoader constructer there are the following lines:
> ----------------------------
> java.security.AccessController.doPrivileged(
> new java.security.PrivilegedAction() {
> public Object run() {
> image[0] = toolkit.getImage(fn); //texture file to be loaded
> return null;
> }
> }
> -------------------------------
>
> I'm almost sure that the error i got is because of security violation,
> since the same program runs just fine as Java application.
>
> Another question is whether i somehow can stop VM from the applet. I
> know that usually this is impossible (eg, to stop NS original VM). On
> the other hand i think that this can be done somehow under Java Plug-in
> by means of editing the same java.policy file. If this can't be done
> then can i somehow distinguish whether Java program runs as applet or
> application.
>
> BADLY need your help! Eagerly waiting for any help, thank u VERY much,
>
> vladimir
>
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