Questions tagged as 'java'

Tagged questions
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problem when going from one fragmet to another [closed]

Hello, the problem is that I'm trying to go from Fragment to another by a button but when I touch the button the other Fragment is positioned on top of the first one, that is, the two fragment are displayed on the screen...
asked by 28.04.2017 / 00:18
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Path and file name FileDialog

I need to know how I can get the route and name of a selected file using a FileDialog . In other words, when selecting a file and doing click on the open button, save the path of the file in String and in another string...
asked by 29.04.2017 / 04:26
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Add element to array Json with Gson

This is my Json file: [{"nombre":"Activo","valor": 8500},{"nombre":"Pasivo","valor":500000}] And I want to add another object to the last position of that array using Gson, I try the following: public void add(Cuenta cuenta) throws IOExce...
asked by 28.04.2017 / 03:32
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Force the download of a csv file from a servlet

I'm doing a java application where you have to download a CSV file. But it is happening to me that the browser does not show the download dialog, but shows it embedded in the browser itself. This is the code of my servlet: List<M...
asked by 03.02.2017 / 12:40
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Is there any way to create autoscroll to a listview ?, in Android Studio

I have a problem, make an example of a chat I found on the Internet, the example works very well only when trying to send messages and did not become autoscroll every time I sent messages, I had to scroll myself to be able to see the new message...
asked by 04.02.2017 / 08:39
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Is it possible to activate an alarm via EditText?

I activate my alarm by means of datepicker and timepicker, but I would like to know if it is possible to activate the alarm by means of an editText with mm / dd / yyyy? My code to activate it by the datepicker and timepicker. private void s...
asked by 08.01.2017 / 18:11
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Consultation sql java

I'm programming with Java. I am new in this language. What happens is that I insert a table in MySQL, but it appears:    SQLException: Unknown column 'jose' in 'field list' In fact, I printed the SQL and executed it in the PhpAdmin and it...
asked by 31.12.2016 / 03:28
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How to add ImageView to ListView

I've been reading and apparently you have to create an Adapter, but the truth is that I do not clarify much, someone could make an example or guide me something else? If you need more information or something else, tell me. Thanks! I leave my...
asked by 31.12.2016 / 00:37
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ApiRest security with Jersey

I have made an Api Rest in java with maven jersey. But the time has come to protect her. How should I do it? I have seen JWT to do the practice, but I'm not sure how it should correctly integrate. I can now send and receive the header t...
asked by 30.12.2016 / 17:32
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I can not download tables as excel

The thing is simple, I want to export a table of primefaces to .xlsx however at the moment of pressing the button that should do it, I get the following exception: java.lang.ClassNotFoundException: org.apache.poi.ss.usermodel.RichTextString...
asked by 11.01.2017 / 19:21