Questions tagged as 'java'

Tagged questions
1
answer

Java CDI - Configuration

I created a simple project containing a Test class and an InterfaceInterface interface. In the test interface I created some method just to test. In the Test class I just put @Inject Service service; When I call the interface method, it is...
asked by 17.01.2017 / 20:42
1
answer

Doubt with JComboBox to enter data at runtime [closed]

I'm new to Swing and this is the first Java application I'm actually doing, however I'm doubtfully related to JComboBox because I'd like to do a field (JTextField) where I'd put the directory and click a button JButton) and send it to the JCombo...
asked by 13.01.2017 / 04:15
1
answer

Compound key problems in JPA

Hello, I'm kind of new to JPA and I'm having trouble with a compound PK. The class Aluno follows: @Entity @Table(name = "Aluno") public class Aluno { @Id private String ra; @Column(length = 50, nullable = false) pri...
asked by 19.08.2016 / 06:07
1
answer

Camera appears with black screen. Error fail to connect to camera service

I'd like to open the camera, but without the buttons that appear normally, I'd like to add my own buttons and assign features to them. I searched but found no answer. The buttons I'm going to add will only redirect to another activity, it's n...
asked by 20.08.2016 / 18:00
2
answers

Exception in thread "main" java.util.InputMismatchException

I made a simple program, just to calculate a mathematical function so I get an exact result, but there were some complications in Java. Digite o valor de x: 0.2 Exception in thread "main" java.util.InputMismatchException at java.util.Scanne...
asked by 29.08.2016 / 03:37
1
answer

@OneToMany without Primary Key

Is there a possibility to make a @OneToMany relation without Primary Key in the child table? Follow my two entities. Entity Noticia : @Entity @Table(name = "NOTICIA") @NamedQueries({ @NamedQuery(name = "Noticia.findAll...
asked by 25.08.2016 / 14:04
1
answer

Pick view position on screen and apply to another view

I'm trying to make a transition effect when I open a DialogFragment but for this I need the photo ( CircleImageView ) of DialogFragment to be in the same place as the photo of Activity that opens it. If it is not clear...
asked by 25.08.2016 / 21:34
1
answer

Formatting a textfield with currency style

I'm using NetBeans, and I can not show the value formatted as currency, for example $ 1,200.00. When I type in the text field, the zeros do not appear. I have a form with two fields: one for name and one for salary. In both, I'm using text field...
asked by 29.08.2016 / 01:55
2
answers

Where should I put the Try / Catch blocks using MVC?

I am doing a web application in java and I have some doubts regarding the try catch block, I am using the MVC standard and I have the following codes: Controller: try { String pesquisa = "%" + request.getParameter("pesquisa") + "%";...
asked by 14.11.2016 / 15:51
1
answer

NullPointerException error [closed]

   Caused by: java.lang.NullPointerException        at DAO.Database.ScheduleReview (Database.java:184) This error was displayed in my logcat . The method: public boolean verificaSeTemRegistroNaTabela(String tabela){ String...
asked by 17.11.2016 / 19:56