Question

How do you check if the application has permission to read or write to specific directories on the filesystem. I am trying this:

try {
    AccessController.checkPermission(new FilePermission(files[i]
            .getAbsolutePath(), "read,write"));
}
catch (Exception e) {
    System.out.println(e.toString());
}

but it always throws the exception and outputs:

java.security.AccessControlException: access denied ("java.io.FilePermission" "C:\Dell" "read")
java.security.AccessControlException: access denied ("java.io.FilePermission" "C:\Documents and Settings" "read")
java.security.AccessControlException: access denied ("java.io.FilePermission" "C:\glut-3.7.6" "read")

Is there something I’m missing here?

Answer 1

Seems that AccessController always throws an exception when you don’t have permission. You can handle this by catching SecurityException.

Better solution to check read/write permission with java.io.File.canRead(), java.io.File.canWrite() methods.