How to show custom message based on shipping class on single product page

// =========================================================================
// Custom Text on Product Page based on Shipping Class 
// =========================================================================
function display_shipping_class_on_product_page() {
    $product = wc_get_product();

    $shipping_class = $product->get_shipping_class();

    switch ( $shipping_class ) {
        case 'your_shipping_class_1':
            echo '';
            break;
        case 'your_shipping_class_2':
            echo '';
            break;
    }
}
add_action( 'woocommerce_single_product_summary', 'display_shipping_class_on_product_page', 10 );