我有这样的绳子 ""3333"" 我要转换成 Long 但当我看到这个例外

java.lang.NumberFormatException

我试过很多方法，但我不能改变
我正试着这样做

public void addNewFriend(List<String> mobileList, String login) {
    try {
        List<Long> list = new ArrayList<>();
        mobileList.forEach(x -> {
            log.debug(x);
            x=x.replace("\\\"","");
            Long y = Long.parseLong(x);
            log.debug(y.toString());
            list.add(y);
        });
        log.debug(list.toString());
        Set<AppUser> appUsers = appUserRepository.findByMobileNumberIn(list);
        if (appUsers.size() > 0) {
            AppUser appUser = appUserRepository.findByLogin(login);
            appUser.friends(appUsers);
            appUserRepository.save(appUser);
        } else {
            throw new BadRequestAlertException("cannot find user relation with author", "AppUser", "List is Empty");
        }
    } catch (NoSuchElementException e) {
        throw new BadRequestAlertException("Cannot find User", "Url", "Check your input");

    } catch (NullPointerException e) {
        throw new BadRequestAlertException("cannot find user relation with author", "AppUser", "List is Empty");

    } catch (Exception e) {
        throw new BadRequestAlertException(e.getMessage(), "Server Error", "Check it!");
    }

}

注意：我接受了Kafka的这个请求，我无法直接获得移动列表