I'm using the following code to check the access on selected folder. but it's not working.

private boolean writeAccess(String path){
    try {
        AccessController.checkPermission(new FilePermission(path, "read,write"));/*,*/
        // Has permission
        return true;

        } 
    catch (SecurityException e) {
        // Does not have permission
        return false;
    }   
}

wt is prblm in it. and is there any other options to check the existance and access on the folders/directories?