public static String loc_file() {//lokacja pliku conf
        URL location = SQL.class.getProtectionDomain().getCodeSource().getLocation();
        String file_loc = String.valueOf((location)).replace( "/","\\" ).replace("\\app\\Gra.jar","").replace("file:\\","").replace("\\out\\production\\Gra\\","").replace( "%20"," " );
        //file_loc = "C:\\Users\\ddykacz\\Desktop\\QUIZ\\Gra\\out\\artifacts\\Gra\\bundles\\Gra";
        return file_loc+"\\config\\"+file;
    }