Questions tagged as 'java'

Tagged questions
1
answer

Get selected object id attribute in JComboBox

I have a table in the DB with Id Columns, Number Plate, and Drill on the board. I would like to show in the JComboBox the concatenation of "Plate N ° + Drilling". Example:    Plate 10 - 113.00 mm But when a combobox item is s...
asked by 28.11.2016 / 20:04
1
answer

Add empty item to the end of ListView

I have FloatingActionButton in the lower right corner of my screen, and when it reaches the end of ListView , it sits on top of a button. I would like to add an empty item at the end of ListView so that when it reaches the en...
asked by 18.08.2016 / 16:47
2
answers

How to do this consultation with JPA?

I would like two solutions to this question, one using a normal typedquery and another using the criteria because of its great versatility for the code. Here is my query: TypedQuery<Pessoa> query = em.createQuery("SELECT a FROM...
asked by 18.08.2016 / 15:26
1
answer

Java Academic System [closed]

Hello .. I need help setting up a Java program with the following specifications: 1) Read the following items from the user: Name (String), Age (int), Genre (char [M or F]), Phone (String), Address (String), cpf (String), rg (String), Neighbo...
asked by 16.08.2016 / 03:41
1
answer

How to close a file in Java?

I'm trying to delete a file using File , but I get the following error:    The file is already being used by another process. I also get this error when trying to rename using Files . How can I "close" a file in Java and th...
asked by 26.12.2016 / 14:56
2
answers

How to solve the JPA Hibernate error

Can you help me with this error? Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named bsewebservicePU at javax.persistence.Persistence.createEntityManagerFactory(Persistence.jav...
asked by 22.08.2016 / 18:01
1
answer

How to update an owner app? [closed]

I have an app that should only be used by an x number of employees, so it's not in the playstore, but I wanted to know how I can make updates available and install them.     
asked by 19.08.2016 / 21:37
1
answer

How to sort a table using Collections?

I am developing a similar application to the Olympic medals table. I have already done the classes and the table with the countries and their respective medals. Now I am hooked on the part that I need to organize the table by the greater amount...
asked by 23.08.2016 / 13:33
1
answer

Get json array value for string - Java

Hello, I do not have much knowledge in Json and I have a problem and I did not find an exact solution of it in the community. I have the following format in the json file: { "name" : "ProductName", "description" : "descripti...
asked by 19.10.2016 / 01:00
2
answers

FATAL EXCEPTION error loading image gallery using AsyncTask

I'm creating a small gallery and I'm having a hard time loading images using AsyncTask class adapter: public class AdapterGaleriaFragment extends BaseAdapter { Context ctx; List<ImageDataModel> lista; public AdapterGaleriaFragment(Con...
asked by 18.10.2016 / 23:44