Questions tagged as 'java'

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How can I pass a controller variable to a jsp?

I have the following method in which I recover values, and I do an operation with these values, what I want to do is send my variable total to jsp, 'because I want to validate with that value, and for example, if my variable total...
asked by 10.09.2018 / 20:15
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(Windows10) Netbeans 8.2 does not detect my JDK

I already have the JDK correctly installed but the IDE does not detect it. I was googling and apparently I have to edit the file tmcbeans.conf but in mine there are not the lines of code that apparently others have.  Some also propose adding a l...
asked by 05.09.2018 / 00:57
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Calculation of time differences in Java

I have a BDD that has a field in Timestamp, the record creates it in the BDD according to the time zone of the server which I can know. On the other hand, the GUI is in another time zone (I can also know it). Someone can help me to convert th...
asked by 01.09.2018 / 16:52
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Insert batch txt records into MySQL with JAVA

I am working in JAVA and I need to save the records that are in a file.txt to my MySQL database, the problem is that they are many records and inserting them one by one takes a long time. I need to know how to apply the methods addBatch a...
asked by 03.09.2018 / 13:28
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How to generate an invoice in java netbeans

My question is how it could generate a type of bill in netbeans like the one delivered in supermarkets example If someone can help me with a video or documentation I would appreciate it.     
asked by 03.09.2018 / 03:06
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How to submit to a jsp from a modal window?

I have the following method in my controller that retrieves data from a query that I have in other methods @RequestMapping(value= "/obtenerDatos") public void obtener(HttpServletRequest, HttpServletResponse, Model model){ Object attribute...
asked by 12.09.2018 / 05:34
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Error saving my Sales record

I'm making a sales system but on the Sales screen when I give it the save option I get an error and it does not save me. I'm new to this, the error you get is: private String accion = "guardar"; public static int idusuario; void ocult...
asked by 12.09.2018 / 02:29
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Pass an object between classes

I am learning graphical interface in java with JFrame and I want to pass an object of a frame which creates a series to the main frame where I can see different objects. I thought about using a getter so that the return is of the Series typ...
asked by 12.09.2018 / 07:38
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How to save .kml files in internal memory of Android device

I would like to know how I could download a .kml file from my android application and store it in the internal memory of the device for later use. I hope you can help me Thank you.     
asked by 05.09.2018 / 22:12
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call a constructor from another builder in java

for a practice exercise I have two constructors to create a table, in one of them I receive as arguments a matrix with the data and a vector with the headers, I want to insert the headers in the matrix and then send the edited matrix to the fina...
asked by 11.09.2018 / 13:39