[6335] in java-interest
Re: File Security Exceptions in Java
daemon@ATHENA.MIT.EDU (Jeff Marin)
Fri Mar 29 14:47:16 1996
Date: Mon, 18 Mar 1996 23:16:56 -0500
Reply-To: Java Interest <JAVA-INTEREST@JAVASOFT.COM>
From: Jeff Marin <jmarin@MARS.SUPERLINK.NET>
To: Multiple recipients of list JAVA-INTEREST
<JAVA-INTEREST@JAVASOFT.COM>
Alan Masters wrote:
>
> Please could you help ?
>
> I am attempting to develop an application that reads and writes to a database
> on a locally networked Sun server.
>
> I have executed code including the following snippet, using the JDK 1.0
> appletviewer, as Netscape Navigator 2.0 does not produce any apparent result
>
> Produces file dialogue box } FileDialog fd = new FileDialog ( this, "FD" );
> } fd.show ();
>
> Shows selected directory } string = fd.getFile ();
> and file } System.out.println ( string );
> } string = fd.getDirectory ();
> } System.out.println ( string );
>
> File dir = new File ( string );
> Produces the exception } if ( dir.exists () )
> message below } {
> System.out.println ("Dir exists");
> }
>
> *** Security Exception: file.read:/home/amast/Java/experiment/ ***
> sun.applet.AppletSecurityException: security.file.read:
> /home/amast/Java/experiment/
> at sun.applet.AppletSecurity.checkRead(AppletSecurity.java:266)
> at sun.applet.AppletSecurity.checkRead(AppletSecurity.java:237)
> at java.io.File.exists(File.java)
>
> I suspect that it is a Systems Administration issue, and would be grateful if
> anybody could refer me to some on-line documentation describing what might
> be required,
> so that I could pass this on to the Systems team.
>
> Many thanks, Alan Masters.
Java security disallows all local file operations within applets
including checking for existance. Try using a stand-alone app instead.
--
************************************************************************Jeff Marin jmarin@superlink.com
@Work Technologies http://www.worktechs.com
< "To err is human, to not learn JAVA mentally healthy but unavoidable!"
>
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