Questions tagged as 'nullpointerexception'

I am developing a web application that registers visitors to a facility. I try to restrict the entry to a section of the application so that only logged-in users with administrator roles can access it. This is my controller: @Controller @PreAu...

I have my Java program and I get a NullPointerException and I have seen other questions but they are from people with other programs and it does not work for my program and I want to leave here the 2,000 lines of my program so that you solve the...

I am trying to connect my android app with a web service in ASP.Net to update data. The issue is that, from what I understand, the connection is established, but the responseBody returns empty and the ResultadoObject to null...

Very good, I could be given a hand with this error, I need to be able to parse the input (whole) from the keyboard and pass it to an object /**Clase Main: **/ public class app { public static void main(String[] args) { Persona...