Get args from URL in Drupal 8

Example: 

    $current_url = Url::fromRoute('<current>');
    $path = $current_url->toString();
    //OR of you want to get the url without language prefix
    $path = $current_url->getInternalPath();
    $path_args = explode('/', $path);

Method 2: (Get first argument from url on Drupal 8)

$request = \Drupal::request();
$current_path = $request->getPathInfo();
$path_args = explode('/', $current_path);
$first_argument = $path_args[1];