Questions tagged as 'java'

Tagged questions
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My app that has ListView with ArrayAdapter is closing when creating the list

I want to make a product listing, where each line contains more than one information per line. The problem is that the app throws an exception (I believe) and closes when I click the button that would populate the list. I made a custom Vie...
asked by 07.07.2016 / 05:05
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string comparison + linkedList

Good evening, I'm trying to compare a string with a linked list but I'm not having success, the linked list is being returned a value from another function, but I'll put the linked list output here. assertEquals("nome composto",frase.converter...
asked by 08.07.2016 / 02:00
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Error reading strings - getting buffer \ n

I am using a variable of type String to pick up the answer whether or not to insert a new account. When I start the program, in do while I ask for the name of the holder. The program does not display the question after reading t...
asked by 23.03.2016 / 13:38
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Java Desktop with Mysql Bank

I'm trying to write an image to the MySql database, the table is just below, the code to load the image is right after that, I'm using a button to load a JLabel, after that I use another button to insert the image image in the database, just bel...
asked by 23.03.2016 / 18:54
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Vraptor task does not work

I'm having a problem with the vraptor task. I have a Vraptor 4 project created that is sending mail normally, but when I try to create a task it does not send email. See the task class Controller public class EntrevistaTask { private final...
asked by 26.05.2016 / 02:36
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Extracting file with ProgressDialog

Hello, I need to implement ProgressDialog while the file is being extracted. My extraction code is next. Now I just need to implement ProgressDialog , remembering that the code I've tried has been tried to be implemented ProgressDial...
asked by 27.05.2016 / 18:54
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Draw rows in binary tree graphing

I'm trying to draw a binary tree using swing and awt in java. I can already show the nodes of the tree but I can not draw the rows of a parent node to their children. I have the Node, TreeGUI, DrawTree, and Main classes. This image is like the e...
asked by 27.05.2016 / 19:53
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How to add a ProgressBar in a PagerAdapter?

I have a ViewPager that uses a PagerAdapter to make an image slide. In my class that extends PagerAdapter I have an AsyncTask that loads the images from the internet and plays in ImageView. How can I put a ProgressBar spinner to stay running whi...
asked by 05.04.2016 / 12:46
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ERROR when starting the java project with tomcat

I put the project war in the webapp folder but the application does not appear in the browser gives this error: SEVERE: Error deploying web application archive webrun.war java.lang.UnsupportedClassVersionError: Bad version number in .class fil...
asked by 07.04.2016 / 15:03
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What is the use of .this in Java [duplicate]

Hello, so I'm starting in java and I'd like to get a better understanding of what .this is. I guess it has something to do with the current class or something of the genre. But I'm not sure. I'll post a part of my code that .this is contained...
asked by 19.03.2016 / 06:56