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private void privilegedMethod(final String filename) throws FileNotFoundException {
  try {
    FileInputStream fis = (FileInputStream) AccessController.doPrivileged(
      new PrivilegedExceptionAction() {
        public FileInputStream run() throws FileNotFoundException {
          return new FileInputStream(filename);            
        }
      }
    );
    // do something with the file and then close it
  } catch (PrivilegedActionException e) { /* forward to handler and log */ }
}

private void privilegedMethod(final String filename) throws FileNotFoundException {
  try {
    FileInputStream fis = (FileInputStream) AccessController.doPrivileged(
      new PrivilegedExceptionAction() {
        public FileInputStream run() throws FileNotFoundException {
          return new FileInputStream("/usr/home/filename");            
        }
      }
    );
    // do something with the file and then close it
  } catch (PrivilegedActionException e) { /* forward to handler and log */ }
}