Questions tagged as 'java'

Tagged questions
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Images are repeating in ImageViews

I have 54 images I need to show only 8, but there has to be a random selection and they can not be repeated, I'm programming on the Android Studio platform. I use this code it works quietly, it shows the results in 8 ImagemView , More ....
asked by 14.09.2016 / 04:28
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Problem in "encrypting" text program in Java

So guys, I have a little problem with one of the workouts I have to do. The teacher provided .doc with instructions for a " Encryptor Program " that should mask the alphabet and encrypt a text (Enigma style). See Exercise Statement:...
asked by 05.10.2015 / 09:35
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Thread execution - Java EE - Jboss

I have a web application using Jboss EAP, JSF, CDI, EJB and need to start a thread whenever JBoss is started. The thread belongs to the TinyRadius package that implements a Radius server. How can I invoke the start method every time I...
asked by 03.10.2015 / 03:28
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How to encrypt images with algorithm RC5 in Java

I'm trying to use the RC5 algorithm with the Java cipher class, but it's returning an error, can anyone help me? import java.io.*; import java.security.*; import javax.crypto.*; public class EncriptaDecriptaRC5 { KeyGenerator keyGenerato...
asked by 24.09.2015 / 15:34
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How can I make a variable wait for the user to press 1 of 4 buttons?

Well, I'll try to be clearer. I have a variable called int tentativa and I want it to get a specific value depending on which button the user presses. The buttons are btPedra[0], btPedra[1], btPedra[2], btPedra[3] . If the...
asked by 12.06.2015 / 05:00
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How to read a Json without knowing what's inside it or the amount of data?

I am developing a dynamic form for Android in which you receive a Json file and create the forms. It's all automated, except for the part that I have to get a string in Json's hand. Is there a way to read the string without naming it within ....
asked by 16.06.2015 / 23:16
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Image upload with PrimeFaces on TomCat server, being saved only the path of the image in the database

Talk to people. I'm a beginner in Java and I'm doing a small Dynamic Web project using PrimeFaces, JSP, Hibernate and TomCat. Basically it is about several forms of registers and one of them is the register of users. The Domain, Bean, DAO, an...
asked by 10.06.2015 / 03:23
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How to map entity with hibernate to create non-unique constraints?

I'm trying to create an entity with the following mapping: @Entity @IdClass(AutenticacaoPK.class) public class Autenticacao { @Id @OneToOne(cascade = CascadeType.REFRESH) @JoinColumn(name = "codUsuario", unique = false) private Usuari...
asked by 11.06.2015 / 20:09
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How to install JavaFX?

I'm a Linux user (Fedora Workstation 26) and I'm trying to develop an application in JavaFX using Netbeans as IDE, the problem is that I did not find the JavaFX SDK for linux download, and the official download link in Oracle page has been disab...
asked by 11.10.2017 / 14:11
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How to create a mask for JformattedTextField?

I'm doing a program that simulates the Turing Machine, and the user fills a form with the states like this {q0,q1,q2} . But I want to create a mask that the user types only q0q1q2 and the value is thus formatted {q0,q1} and all...
asked by 01.10.2017 / 00:42