Questions tagged as 'java'

Tagged questions
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Bug in the Spring query code with Hibernate

I have a problem, I'm studying spring mvc with hibernate and I ended up getting into a bug where it returns the following exception "java.lang.NullPointerException", it follows the codes: ContactController package br.com.agenda.controller...
asked by 03.02.2017 / 00:38
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@QueryParam - Date Type

I'm having trouble sending a Date, it's always null in my controller rest. I've tried it without $ .param too and it has not rolled. My $ scope.filter.begin is already going in Date format in the request and the value is correct. How do I...
asked by 24.02.2017 / 13:58
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How to change the state of a ToggleButton in java?

I've created this Drawable to set as Background of the 6 ToggleButton . How do I get the ToggleButton to switch between them without being clicked? <selector xmlns:android="http://schemas.android.com/apk/res/android"> <it...
asked by 02.01.2017 / 22:21
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Problem with JSF

I have a screen and would like each product added, could choose a quantity and then calculate that quantity by multiplying by the value of the product. However, I have no idea how to do this, because every time I add a new product the quantity i...
asked by 04.01.2017 / 19:20
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How to load data in CSV in Oracle SEM SQL Loader?

The data in a table has been exported to a CSV file and would like to import it into a table in the Oracle database. However I need it to be without the sqlldr command. Because this load will be done in Java, and I have restrictions on using SQL...
asked by 04.01.2017 / 11:05
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How to scan a signature with java

I need to get the signature on a document but would not like to print the same. Does anyone know to indicate a signature pad that works with the primefaces?     
asked by 28.11.2016 / 17:32
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Apache POI - Error opening file generated in MS Excel

Hello, I'm running some tests with Apache POI , version 3.15 , for .xlsx reporting using the sample code below, only to generate a file: package exemplousoapachepoi; import java.io.*; import org.apache.poi.xssf.usermodel.*; /** * * @...
asked by 23.11.2016 / 17:11
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Method with generics in inherited type [closed]

How do I use two types in the generics method, to sum only the areas of the Quadrado and Retangulo classes. I tried a method like this: public static double soma(Forma <? extends Quadrado> elementos) { return...
asked by 25.11.2016 / 02:27
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Data mask

I am using a JFormattedTextField with the mask (##: ##) so that the user enters a time and my program searches the database returning the corresponding values at that time. My problem is that in the database the information is without the ":"...
asked by 03.12.2016 / 00:06
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How do I position JTabbedPane on the bottom half of the screen?

I would like to have my screen split into at least two parts, at the top I will add some fields, and at the bottom, a% with_with% of tabs. The problem is that I do not know how to do this, I can only do JTabbedPane occupying the entire screen....
asked by 02.12.2016 / 18:03