whats happening in the line of code
whats happening in this line of code ? SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1"); i specially dont understand getInstance("PBKDF2WithHmacSHA1") part ...
java
Java Reflection not working on my system - working for team members
I am working on a team project in Java. One requirement is that we dynamically populate a drop-down menu of all classes that implement a certain interface. New classes can be added after compile time. To accomplish this we are using reflection. Problem: All of the drop-down menus are blank on my system. I cannot for the life of me figur...
parsing notepad using java
Hai I want to parse text file using java. please prefer me an appropriate api Thanks in Advance ...
why should aes key be generated randomly ?
when you want to encrypt something dont you want the key to decrypt to be decided by you and not generator by some random number generator ? i see this code in stackoverflow post. but i dont want the key to be generated randomly i want to the user to be asked to enter the key and on that bases the encryption should happen.. any suggest...
In what order are the different parts of a class initialized when a class is loaded in the JVM?
Imagine a Java class which has most features that you can find in a class. For example: it inherits from another class, implements a couple of interfaces, includes some 'static final' constants, some final constants, some static variables, instance variables, a static block, an unnamed code block (just code in {}), constructors, methods...
How to output <option selected="true"> from JSPX ?
A few html tags interpret "any" value of a give attribute as "true" -> option tags come to mind. I frequently end up doing something like this: <c:choose> <c:when test="${isSelected}"/> <option selected="true">Opt1</option> </c:when> <c:otherwise/> <option>Opt1</option> </c:otherwise> </c:choose> I kno...
MVC-Pattern enabling buttons on event in Java
Hey, I'm getting started with the MVC-Pattern right now and have something I'm pondering about. Imagine following case: I've got a view (obviously). In this view the User can select a file and then click a "Load"-Button. As soon as this load-button is clicked, all other components in my gui should be enabled as they are set to "disable...
AES encryption - password , salt not resolved ?
i get the error " password , salt not resolved ". any suggestions ? package org.temp2.cod1; import java.security.*; import java.security.spec.KeySpec; import javax.crypto.*; import javax.crypto.spec.*; import java.io.*; public class Code2 { public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchPaddingException...
Open the SAP thick client screen from Java program
Having any thick client like SAP Logon installed, users can connect to required SAP server and access data through transactions. What I am trying to do? - To invoke the SAP thick client installed in the users machine and redirect the user directly to required transaction from the service (in turn Java code) What is posisble? - It is po...
Spring configuration in GWT Project?
I am developing a GWT-Spring-Hibernate project and I want to use Spring Autowired annotation in GWT Service Servlet but my autowired annotated service is not injected. it is null. Is there a configuration detail that I missed? I add <context:annotation-config /> <context:component-scan base-package="com.org" /> to my ApplicationConte...
How to develop a customized browser with java?
Which knowledge are I supposed to have to do this job? ...
please explain this line of code
please explain whats happening in this line of code . specialy what is args[0].tocharArray char[] password = args[0].toCharArray(); ...
Java Hardware Interrupt Handling
I would like to know if it is possible to automatically invoke a Java method when a hardware interrupt is raised. ...
ArrayIndexOutOfBoundsException
this code is showing ArrayIndexOutOfBoundsException: at the line char[] password = args[0].toCharArray(); . what to do ? package org.temp2.cod1; import java.security.*; import java.security.spec.InvalidKeySpecException; import java.security.spec.InvalidParameterSpecException; import java.security.spec.KeySpec; import javax.crypto.*; i...
How can I make mobile version of an existing web site?
hi, We have a website coded with jsp-Java. Now, we want to show our website more user friendly on blackberry etc. Is there any tool or method to do this issue more easier? thanks for your answers. ...
Why ItemSkippedException?
I am trying to update content in Google sites and am reading the stream in exception VersionConflictException. When I check the stream it is all fine and is completely loaded in POST request but then I get following error. org.apache.commons.fileupload.FileItemStream$ItemSkippedException at org.apache.commons.fileupload.MultipartStr...
Multiple @ManyToMany sets from one join table
Hi guys, I'm mapping a proprietary database to Hibernate for use with Spring. In it, there are a couple of jointables that, for entity A and entity B have the following schema: CREATE TABLE AjoinB ( idA int not null, idB int not null, groupEnum enum ('groupC', 'groupD', 'groupE'), primary key(idA, idB, groupEnum) ); As you ca...
Exception when loosing a thread
I start two threads with a Timer and TimerTasks Timer timer = new Timer(); TimerTask task = new TimerTask() { public void run() { doSomething(); } }; Calendar start = Calendar.getInstance(); timer.scheduleAtFixedRate(task, start.getTime(), 1000 * 60 * 60); Now sometimes the second ...
java PdfTextExtractor.getTextFromPage(Unknown Source)
Hello i have trouble with parsing a pdf when the iterator reaches page 11 an exception is throw. Any ideas? Thanks Here's my code: import java.io.*; import java.nio.charset.Charset; import java.util.regex.*; import com.lowagie.text.pdf.PdfReader; import com.lowagie.text.pdf.hyphenation.TernaryTree.Iterator; import com.lowagie.text.pd...
Can i break up a jsp foreach loop with stripes layouts
Say I have the following for each in a stripes layout definition <c:foreach items="${foo}" var="bar" > <s:layout-component name="whatever" /> </c:foreach> Then when I render I do something like this <s:layout-component name="whatever"> //Do something with bar </s:layout-component> The whatever component is rendered before ...