All Questions

1
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Transparent windows, create transparent Form

How can I make a transparent but not so controls (TextBox, Label, Button, etc) that has been added to the form , with C # .     
asked on 07.09.2016 / 18:41
1
answer

Obtain capacity of an ArrayList

In an exercise I am asked to obtain the size and capacity of a previously filled Vector and ArrayList. In the case of the vector there are not many problems to do it, because it has a method. Vector<Object> planetas = new Vector<&g...
asked on 15.09.2016 / 08:16
1
answer

Problem with updating method in Database

I have this method save in a class that controls frame events: if(e.getSource()== estMostrar.getBtnModificar()){ String nombre= estMostrar.getTxtNombre().getText(); String materia= estMostrar.getTxtMatricula().getText();...
asked on 09.09.2016 / 01:16
2
answers

4 errors in an example (java)

class Demo { public static void main(String args[]){ byte x; int a=270; double b =128.128; System.out.println("int converted to byte"); x=(byte) a; System.out.println("a and x "+ a +" "+x); System.out.println("doub...
asked on 03.10.2016 / 20:05
2
answers

Problem mouseListener and JTable

I have a class in which I am implementing the events of a frame and I want to make every time that double-clicking on a table opens another window and shows me the data of that object, I am implementing the mouseListener interface to the class...
asked on 09.09.2016 / 11:01
2
answers

Query database by parts

I'm looking for a way to make my database show up in parts. That is, first the first 10 rows, by pressing a button, make a query with the other 10, and so on until the end. I have searched the internet and I have only found the LIMIT claus, whic...
asked on 11.09.2016 / 23:08
1
answer

How do I pass data between controllers?

I want to make a navigation bar in my web, so, in the index I want to put the section where the user is located. The problem I have is that I do not know how to pass the variable to the MasterController from the Controller of each view, so th...
asked on 07.09.2016 / 10:40
1
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Class error, query php, can not be converted to whole

Hi, I'm doing a page through php but I have a problem when I want to count the number of records and I can not use it to get the number of pages. Php code: <?php require_once 'database.php'; $database_connection = database_connect(); $t...
asked on 13.09.2016 / 20:43
1
answer

Should I copy Metadata folder to servers?

In a GeneXus Web application using .NET, a "Metadata" folder is created under the "web" folder, which contains 2 more folders (Interfaces and TableAccess). The question is whether that folder should be included when the application is install...
asked on 06.09.2016 / 17:43
3
answers

Count Numbers entered in a Scanner

I want to make a program in Java that reads a line from the standard input using the class Scanner . The user will write a line with numbers separated by spaces; for example: 3 10 0 13 4 The program must count how many numbers have...
asked on 12.09.2016 / 17:45