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Accessing a local file
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Posted By:   Imran_Masud
Posted On:   Monday, June 25, 2001 05:38 PM

Hi,
I have made an applet and put it on the web.
It asks the user to enter his student number.
After that it opens a frame which opens a local file and then
search for his marks. If I run locally,
it works but not on the web.
When I put it on the web, it trys to open the file from the computer
on which it is running (which is not allowed). How can I fix that so it would open the file from my computer.




Thank you
Imran

Re: Accessing a local file

Posted By:   John_Zukowski  
Posted On:   Thursday, June 28, 2001 01:44 PM

Breaking out of the Java sandbox to access the local file system is already covered in the FAQ.

Re: Accessing a local file

Posted By:   Abdul_Habra  
Posted On:   Monday, June 25, 2001 07:18 PM

An applet, by default can not access the local disk files. The applet runs inside a "sand-box" that prevents it from accessing many computer resources.


If you must access a local file, there are two main options:

1. Certificates.

2. Policy file.

Each has its pros/cons.

Both are documented at Sun's web site.
Also, there is a quick introduction to working with policy files at:


www.tek271.com/articles/java_2_applet_security.htm
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