Questions tagged as 'java'

Tagged questions
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How to get value from Form - Java - Swing

I created a form in Java with interface Swing , in this it has a field textfield Text and a button Send , in the code of the precise button to assign the value informado no textfield to a variable of type...
asked by 30.10.2015 / 13:49
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Bring QR Code data to my fields

I'm reading a QR Code as per the code below: // Botão para abrir câmera e usar o QR Code (Irá abrir a Store para baixar um app nativo) btnQR = (Button) findViewById(R.id.btnQR); btnQR.setOnClickListener(new OnClickListener() {...
asked by 28.10.2015 / 12:07
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How to fix the "No Persistence provider for EntityManager named" error?

When I try to execute the Persistence.createEntityManagerFactory("Aluno") method of class Persistence I get the following error: run: abr 04, 2016 9:11:30 PM org.hibernate.ejb.HibernatePersistence logDeprecation WARN: HHH015016: E...
asked by 05.04.2016 / 02:29
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A method stopping the loop from another method

I have four objects (already instantiated) triangle, square, circle and a last picture, responsible for invoking both methods of each class of the respective objects, in order to draw a house, a sun, a chimney, a window and a roof, and place the...
asked by 06.04.2016 / 20:32
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JLabel is not displayed

I created a label where it would contain the status of the connection process with the database, but it does not appear and I have no idea why this happens, since I have been looking at the code for three days and I do not know What happens, it...
asked by 28.11.2014 / 22:59
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When using recursion method returns 0

I have the following code: public int lerInt() { String entrada = ""; int saida = 0; try { entrada = input.readLine(); } catch (IOException e) { System.out.println("Falha critica."); } try { said...
asked by 06.12.2014 / 01:16
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GlassFish error message

I'm using GlassFish 3.1.2.2 together with NetBeans 7.4 and I do not know where to get this information all the time when I start the server:    INFO: Host user [admin] 127.0.0.1 does not have access from   administration or the user name...
asked by 21.08.2014 / 16:33
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Doubt about attributes initialized in the constructor in Java

package Livraria3; public class Livro { private String nome; private String descricao; private double valor; private String isbn; Autor autor; public Livro(Autor autor) { this.autor = autor; this.isbn =...
asked by 05.07.2015 / 05:10
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java.net.ProtocolException: Too many server redirects

I need to download a file .zip that can be found at the following address: link For this I created the following method: public static void downloadFile() throws IOException{ final File file = new File("download/"); if(!fil...
asked by 05.07.2015 / 02:30
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Select whether the collection contains a given object with Hibernate Criteria

I'm trying to do a query that would be something like the contains method of the interface I have a class Collection and I want to select the groups if your GrupoProdutos , called Collection , contains a certain produc...
asked by 30.06.2015 / 22:51