public static void main(String[] args) {
        String[] customerProducts = new String[5];
        Scanner scn = new Scanner(System.in);
        for (int i = 0; i<5; i++){
            customerProducts[i] = scn.nextLine();
        }
        foundProduct(customerProducts);
    }

    private static void foundProduct(String[] customerProducts){
        List products = Arrays.asList(new String[]{"black","white"});
        for (int i = 0; i < customerProducts.length; i++) {
            if (products.contains(customerProducts[i])) {
                System.out.println("found " + customerProducts[i]);
            }
        }