How to return both HashMap<String, String> and HashMap<String, User>

Question

I need to return both map and map1 how to return what return type i should use. is it possible?

public Map<String, String> getUserDetail(String email, String otp) {
    HashMap<String, String> map = new HashMap<>();
    HashMap<String, User> map1 = new HashMap<>();

    if(otpService.validateOtp(email, otp)){
        if(checkEmailId(email)){
            User user = userRepository.findByEmail(email);
            map1.put("user", user);
            map.put("message","Login Success");
            return map;
        }
        else {
            map.put("message","Email Not Register");
        }

    }else {
        map.put("message","Invalid OTP");
    }
    return map;
}

Answer 1

Java doesn't let you return multiple values, or tuples, natively. There are libraries that exist that include tuples or a Pair class that you can use, but that might be overkill for your use case, as it could be simple enough to create your own:

class UserDetail {
    private HashMap<String, String> messages = new HashMap<>();
    private HashMap<String, User> userInfo = new HashMap<>();

    public UserDetail(HashMap<String, String> messages, HashMap<String, User> userInfo) {
        this.messages = messages;
        this.userInfo = userInfo;
    }

    public HashMap<String, String> messages() {
        return this.messages;
    }

    public HashMap<String, User> userInfo() {
        return this.userInfo;
    }
}

And then your function can look something like this:

public UserDetail getUserDetail(String email, String otp) {
    HashMap<String, String> map = new HashMap<>();
    HashMap<String, User> map1 = new HashMap<>();

    if(otpService.validateOtp(email, otp)){
        if(checkEmailId(email)){
            User user = userRepository.findByEmail(email);
            map1.put("user", user);
            map.put("message","Login Success");
            return map;
        }
        else {
            map.put("message","Email Not Register");
        }

    }else {
        map.put("message","Invalid OTP");
    }
    return new UserDetail(map, map1);
}