public class User {
private String username;
private String password;
}
public class Main {
public static void main(String[] args) {
User user = new User();
user.setUsername("");
user.setPassword("123");
Validator validator = new Validator();
try {
validator.register(user);
} catch (ValidationException e) {
System.out.println(e.getMessage());
}
}
}
