Questions tagged as 'java'

Tagged questions
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Error linking an adapter callback to my recycler

I hope you can help me, I have an adapter of a recycler in which I want to send a callback to its fragment that contains it, but I have a problem when linking the adapter. MY ADAPTER public Cartadapter2(Context context, List<Cart> car...
asked by 29.10.2018 / 18:35
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I can not insert records in function postgresql with jdbc

Good morning friends, I have a problem when I want to insert records from a call to a postgresql function that receives 2 parameters and I want to do it from Java Server Faces and JDBC this is my java code: DAO: @Override public boolea...
asked by 29.10.2018 / 17:08
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Java - software / JAR auto updatable

I know that the idea of the forum is first of all to show code of what we are doing, but I really do not know where to start, so I post it (and leave it to the administrators to close the post if they think it is convenient) . I need that my sof...
asked by 01.11.2018 / 15:10
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Sintax blocking in SonarQube Use try-with-resources or close this "BufferedWriter" in a "finally" clause

When I upload my class and start the following analysis in SonarQube , it presents the following legend: Use try-with-resources or close this "BufferedWriter" in a "finally" clause. I really put the finally and stil...
asked by 01.11.2018 / 15:01
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How to export data from a filter of a primeface datatable

I have the following table: <p:dataTable id="tblpersonas" var="p" value="#{generarListaFuncionariosMB.listaPersona}" filterBy="#{generarListaFuncionariosMB.filtrarPersona}" clientCache="true"...
asked by 01.11.2018 / 11:59
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What is the solution to all present, past and future NullPointerException errors?

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...
asked by 08.01.2017 / 18:54
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I need to login and register in java and sql

hello who can help me to make a login and register in java using database like the windows exchange does not work I'm using xampp package login; import Control_BD.fusuario; import Principal.Conexion; import javax.swing.JOptionPane; import ja...
asked by 29.10.2018 / 15:27
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How to stop the QR reader ZbarScannerView, problem with stopCamera ()

Create an app ... qr selector with zbarscannerview is in a fragment specifically in a RelativeLayout, I already get the QR code, but it freezes when I get it .. with stopCamera () does not stop it .. help please urgently thanks .. So I start the...
asked by 29.10.2018 / 12:31
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JPanel background is not visible

Initially I was grabbing a chess but I ran into this problem so I simplified the program to ask the question. The Program in question is the following: public class NewClass { public static void main(String[] args) { javax.swing.Swing...
asked by 27.10.2018 / 16:24
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How to insert a LocalDateTime (Date with time) into a MySyQL database

I have a database created with phpMyAdmin, and in a "reservations" table I have a field that asks me for the specific date and time of a reservation. Now the problem is in which at the time of inserting the reservation, I do not take the date, w...
asked by 26.10.2018 / 15:32