Questions tagged as 'java'

Tagged questions
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How do I keep the value of a selected checkbox on a page? in java

I am working in java web with jsp and I need to show data from a DB in a table, here I must select with a checkbox field and send the data I select to another jsp, paginate the table with Data Tables, but here when I want to choose items from di...
asked by 23.05.2017 / 03:11
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Convert from hexadecimal to decimal in Java [closed]

I want to convert from hexadecimal to decimal. I'm developing in Android Studio, and here is the fragment of the method. public void calcularDec() { EditText numero1 = (EditText) findViewById(R.id.etNumero1); int n = Integer.parseInt(...
asked by 23.05.2017 / 04:24
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Capture value from datepicker and colorpicker on a String in javaFX

Well, in my program I have a datePicker and a colorpicker, what I want to do is that when I press a button, I will be shown the value of the selected color and the selected date.     
asked by 08.06.2017 / 06:09
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Lottery, lottery exercise

I am involved in a small program that calculates a Lottery. Let me explain, this I am developing in java. We have a betting class with a% co_of% of bets. We have a bet class, where we have a hype of random numbers ranging from 1 to 49, a...
asked by 07.06.2017 / 13:43
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Error in Activity2 of exercise of course android studio

I am following the exercises of an Android Studio course. The exercise that gives me an error is about two screens. In the first one a website address is entered and in the second one the site should appear. When I run it, it only gives me an...
asked by 27.05.2017 / 15:20
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Errors when compiling project imported from GitHub. Android - Eclipse (Works in Debug mode)

I am trying to compile a project which is initially debugged and functional but when compiling it I get a series of errors that I describe below: Description Resource Path Location Type The method getListCellRendererComponent(JList, O...
asked by 24.05.2017 / 18:32
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What is Maven used for? Is it still used? [closed]

Good morning, I would like to know what Maven is used for or the advantages of using it if it is still used. Thank you very much     
asked by 20.05.2017 / 17:49
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Dimensions of BorderLayout zones

I have a problem in the interface that I am developing. I have 4 panels (Oest, Center, East and South) inside another panel, the problem is that I want to modify the size of the center panel since it is too big and this decreases the size of the...
asked by 21.05.2017 / 01:01
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Random array Android

I have an array in String and I want to extract several values from it and show them in a textview when I press a button but I do not know how to get several data from the array. Here is what I have protected void onCreate(Bundle savedInstance...
asked by 20.05.2017 / 19:29
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Validate a CheckBox in a JTable - Java

I have placed a checkbox in a JTable . The problem is that when I click on the test button ( btnPrueba ), a validation message "marque" appears. How would I validate correctly ?: protected void btnPruebaActionPerformed(Act...
asked by 18.05.2017 / 16:23