Questions tagged as 'java'

Tagged questions
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RecyclerView does not expand

Hello, this is the following, I'm using two RecyclerView in parallel: <android.support.v7.widget.RecyclerView android:layout_width="match_parent" android:layout_height="wrap_content"...
asked by 18.11.2016 / 20:18
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Error query JPA list

I am new to JPA and am having difficulty in listing notes in a database. When I get this I get the following return.    11: 00: 32.247 [WARN] [opensig] Field 'private end   java.util.List nodes' will not be   serialized because it is f...
asked by 24.11.2016 / 13:40
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Doubt about Eclipse + Java Selenium

I made the following code to perform a simple login test using Eclipse + Selenium: package memoriavirtualWebTesteFuncional; import org.openqa.selenium.By; import org.openqa.selenium.WebDriver; import org.openqa.selenium.WebElement; import...
asked by 23.11.2016 / 13:18
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avoid Form Resend Confirmation

I'm developing an application and when I click on save it redirects to where I want it updated. But if I refresh the page it asks if I want to take advantage of the data passed before, I would not want that to happen That's how I'm doing:...
asked by 01.12.2016 / 23:26
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Problem with audio in web application with deploy in tomcat7

Hello, I developed a web application that needs audios. I use a javascript code to control this audio call. With the application ready, I transferred to another computer doing deploy on tomcat7. Everything works perfectly except the execution...
asked by 01.12.2016 / 13:08
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Barcode label printing on Argox printer (USB)

I'm developing an application where I need to generate and print barcodes on a label through the printer Argox with USB connection. Although it is a Web application, the system will run locally, that is, the system has access to the machine's...
asked by 14.12.2016 / 14:40
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Strange characters when executing a method to add arrays

Good morning guys, I'm a beginner in Java and I have a problem here. Can someone tell me what these strange characters appear in the console when executing a matrix sum method (I'm using Threads)? Matrixsummethod:publicclasssomaMatriz{public...
asked by 15.12.2016 / 16:10
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Jtable in Java, parameter error?

I'm having trouble passing the parameters to my jTable , these parameters being Object[][] and String[] . tabela = new JTable(dados, colunas); It does not work the data is an array like this: dados = new Object[1][con...
asked by 12.12.2016 / 13:05
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Implementation of a LinkedList

I'm having trouble implementing a LinkedList for the Data Structure discipline. The code is giving this error:    Exception in thread "main" java.lang.NullPointerException , and I do not quite understand why. Here is the code:...
asked by 10.12.2016 / 12:53
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How to create a GridView with gallery images?

I'm doing a APP working with images, I'm saving the images in the gallery to a folder named imagensAPP like this: SaveImage: public File saveImage() { int imageNum = 0; //SALVANDO EM IMAGENSAPP . . . File...
asked by 12.12.2016 / 13:14