Questions tagged as 'java'

Differences between nextInt and parseInt? I try to make a code that performs a subtraction from two numbers entered by keyboard, the first code is what I tried to do and the second code would be part of the solution with which I have doubts. S...

Sure it is a very silly mistake ..     

Hi, I would like to see if you could help me see what the error really is I do not understand it: Exception in thread "main" java.lang.NullPointerException at formulariomedico.Vista.<init>(Vista.java:89) at formulariomedico.For...

Currently I'm looking to improve my development, correcting what I'm doing wrong. I would like to know, when applying the DAO and MVC pattern, I have understood that an entity must be created that represents each table in the database, theref...

I am currently making a form where I want to store the record of a student of any institution, in that form I have a ComboBox that is "group" and in that Combo I would like to store information of the database on said table. Group Model pac...