Payment Button (MercadoPago SDK Java)

@GetMapping("/createAndRedirect")
public String createAndRecirect() throws MPException {
    Preference preference = new Preference();

    preference.setBackUrls(
       new BackUrls()
       .setFailure("http://localhost:8080/failure")
       .setPending("http://localhost:8080/pending")
       .setSuccess("http://localhost:8080/success")
    );

    Item item = new Item();
    item.setTitle("Test Item")
            .setQuantity(1)
            .setUnitPrice((float) 75.56);
    preference.appendItem(item);

    var result = preference.save();

    return "redirect:" + result.getSandboxInitPoint();
}