Re: My JVM is closed as soon as I close my Applet

Eric Sosman <esosman@ieee-dot-org.invalid>
Wed, 01 Sep 2010 08:06:12 -0400
On 9/1/2010 7:23 AM, Matrixinline wrote:

Hi All,

I have two applets on a page. One applet starts a frame. When I close
this frame (JFrame) I call System.exit). Now this cause my JVM to
exit. It causes my other applet also gets destroyed,

     I think this will only happen if the exiting applet is trusted,
which usually means you've signed it and the user has told the
browser to accept your certificate. Un-sign the applet or tell the
browser to stop trusting the certificate, and I think the problem
will go away. (Test it to be sure, though: I'm not an expert on
trusted applets.)

     If your applet needs privileged access to the system, that is,
if your applet must be trusted, then you must write it so that it
behaves in a trustworthy way.

Can you please let me know the solution for this. (I do not wish to
remote system.exit call, this will cause me major re-work)

     Hmmm: Haven't tried it, nor even done more than skimmed the
Javadoc, but can you install your own SecurityManager around your
own applet, subsidiary to the browser's own SecurityManager? If so,
you could intercept the System.exit() and deny it permission to run.
(And if my first suggestion is tentative, this is *really* tentative!)

Eric Sosman

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