Questions tagged as 'java'

Tagged questions
2
answers

Doubt about Fibonacci

I have a little doubt with my code to carry out my Fibonacci program since at the time of printing the values it gives me the number but in negative. class doWhileTest{ public static void main(String[] args) { int primertermino = -...
asked by 14.08.2017 / 01:01
2
answers

How to put a user button with drop-down options in Java

I am doing a system in NetBeans in which you have users and in the main screen I want to put a button where the user's image is and when pressing it, a menu containing the option to close session is displayed. Thanks in advance     
asked by 05.08.2017 / 22:09
2
answers

How to wait for X seconds to add an object in an arrayList?

I'm trying to make a mini game where the enemies spawn around the player, the problem is that they come out very fast and very often and the gameplay is very difficult, these enemies are part of an arrayList of "enemy" objects and I wanted to kn...
asked by 18.08.2017 / 22:41
2
answers

Login ajax jsp servlet: Welcome page load in div reserved for error msj

I am developing a Login with jsp, servlet and ajax. When I put the key wrong it shows me the error message well, but when I enter the correct key it loads me welcome.jsp in the div reserved for the error message. JSP Code: <body>...
asked by 19.08.2017 / 16:56
1
answer

error 400 (bad request) with jquery

friends using the method .POST of jquery send some parameters to a servlet mapped with spring , after that I need to return a value to the view, for this I transform the String to JSON with the library GSON...
asked by 09.08.2017 / 15:20
1
answer

Convert color image indexed in java

I have an image stored in a BufferedImage in color RGB (although it could well be another) and I need to convert it to color indexado with Java . Any ideas on how to achieve this? Thanks in advance.     
asked by 01.08.2017 / 19:15
1
answer

Create java application to .exe with Launch4j

I developed an application in java in Netbeans. What I need is to convert it to .exe to use it on a computer that has Windows XP 32-bit that does not have and can not put the JRE for security reasons. My PC works with Windows 10 to 64...
asked by 02.08.2017 / 20:47
1
answer

order selected statement with JComboBox [closed]

Hi, I have a question, is there any way to do that if I select an article from some JComboBox, do some function? I mean, if I select article 1 that is printed on the screen, hello, that is, that kind of function, someone to help me please.     
asked by 11.08.2017 / 00:13
1
answer

Open PDF stored in external directory from android studio

Through JSON I get some PDFs that I found on base 64 and I keep them in the following way: OutputStream out = new FileOutputStream(Environment.getExternalStorageDirectory().toString() + "/documentosConsumerTemporal/pdfConsumer_" + oNombreDocum...
asked by 11.08.2017 / 18:17
1
answer

Evaluate the existence of the type of extensions within an ArrayList [closed]

I need to evaluate the file content of a ArrayList<String> called ArrayArchives , which contains the files raised by extension of a specific address, which I do to raise those extensions. public void buscarArchivo(File ruta)...
asked by 10.08.2017 / 20:12