java

Can Java apps integrate with VB apps?

I am not sure exactly what I am asking....The guys that do the software development for the company I work for write everything in VB. I am currently the Web developer for this company and I specialize in Flex apps. I am thinking about expanding into their area. But I do not want to do VB, I don't mean to bash on VB but the coding syntax...

Java's Virtual Machine's Endianness

What endianness does Java use in its virtual machine? I remember reading somewhere that it depends on the physical machine it's running on, and then other places I have read that it is always, I believe, big endian. Which is correct? ...

How to unzip files recursively in Java?

Hi, I have zip file which contains some other zip files. For e.g. the mail file is abc.zip and it contains xyz.zip, class1.java, class2.java. And xyz.zip contains the file class3.java and class4.java. So i need to extract the zip file using java to a folder that should contain class1.java, class2.java, class3.java and class4.java. Than...

cache controller response

Hi, I'd like to use memcached to cache the response produced by my controllers. The controllers themselves are Grails controllers, but there's nothing really Grails-specific about the problem. If I could figure out how to solve this problem in a Spring MVC, Struts (or similar) application, I should easily be able to migrate the solution...

What limits "hot deploy"?

You can perform hot deploy when you have native Java code on Jetty. This allows you, for example, to make changes to your servlet code without requiring a restart of the server to see your application changes. However, if you run a scripting language on top of Java - Groovy, JRuby, Jython - you can no longer perform hot deploy (at le...

Versions of libraries included in the JDK

I just ran into a problem with the version of JAX-WS in JDK 1.6.0 being different than the one in JDK 1.6.0_14. I've been searching around for a list of the various libraries that are packaged in the JDK that shows the versions of the library included in the version of the JDK. I haven't had any luck yet. Is there such a list? ...

why is '<' showing as &lt;

I am outputting a string form my java class like this String numQsAdded = "<div id='message1'>"+getQuestion()+"</div>"; This string is being sent back to the client side as a XMLHttpRequest. So, in my jsp page I have a javascript alert method that prints out the string returned from the server. it translates '<' to &lt; and '>' to &g...

How is using portlets any better than just using server side includes?

The idea behind portlets is that a website/page can be comprised of a number of applications that are developed individually. They are then fit together on a page by a portal much like a jig-saw puzzle. This allows functionality to be created independently and slotted together at a later date. This has many obvious benefits. However. I ...

Howto manage the game state in face of the EDT?

I'm developing a real time strategy game clone on the Java platform and I have some conceptional questions about where to put and how to manage the game state. The game uses Swing/Java2D as rendering. In the current development phase, no simulation and no AI is present and only the user is able to change the state of the game (for exampl...

Native Javascript method in GWT

I have a native Javascript method in one of my GWT Java classes, but I'm having trouble calling my Java methods from the native Javascript code. I tried to follow this as closely as I could, but I can't get it to work. I compiled it and ran it in Firefox, and the error console said "Error: this.lc is not a function". I tried changing all...

Changing grails.serverURL has no effect on createLinkTo( [...], absolute:'true')?

I'm trying to display a Java applet in a page on a Grails server. I'm using Sun's handy Javascript snippet for displaying applets: <script src="http://java.com/js/deployJava.js"&gt;&lt;/script&gt; <script> deployJava.runApplet({codeBase:"${createLinkTo(dir:'applet', absolute:'true')}", archive:"${createLinkTo(dir:'com/steve/applet',...

Setting "endorsed" dir in an embedded tomcat server

Hi, I am creating a web application using Eclipse (3.4), and m2eclipse. I am using the deploy goal but often prefer to use the run goal for the use of the embedded tomcat in the maven tomcat plugin. I added the xalan jar to the endorsed dir as I had problems with the xalan that is in the rt.jar. It works fine on deployment, but I can't ...

Converting document encoding when reading with dom4j

Is there any way I can convert a document being parsed by dom4j's SAXReader from the ISO-8859-2 encoding to UTF-8? I need that to happen while parsing, so that the objects created by dom4j are already Unicode/UTF-8 and running code such as: "some text".equals(node.getText()); returns true. ...

[Java] Cluster Shared Cache

Hi everyone. I am searching for a java framework that would allow me to share a cache between multiple JVMs. What I would need is something like Hazelcast but without the "distributed" part. I want to be able to add an item in the cache and have it automatically synced to the other "group member" cache. If possible, I'd like the cache ...

JiBX: How do I keep using interfaces in my code?

How can I keep my using interfaces in classes I want to use JiBX binding with? Example: I have this very simple model in java: public interface A { B getB(); void setB(B b); } public interface B { String getData(); void setData(String data); } public class AImpl implements A { B b; @Override public B getB...

Applet works, but swing components won't appear!

So I am creating this applet which I want to have full on swing components in it. I have looked at all the docs, I have made the applet, and I can get something to show up in it if I override the update(Graphics g) method, but simply adding components to the contentPane doesn't seem to be doing it! What am I doing wrong? import javax....

Android: Simple GridView that displays text in the grids

i'm following the example on the android tutorial about the GridView, but instead of showing image, i want to just simple show some text using a TextView. it turns out seems to be harder than i thought. it might seems like this is totally unnecessary and it doesn't have a valid use case, but i'm trying this out to just get myself familia...

ThreadLocal + java.sql.Connection + servlet filter = 2009?

I am writing some servlets with plain old mostly-JDBC patterns. I realized that I have several objects that would like to share a single transaction, and I'd like to enforce that one HTTP transaction = one database transaction. I think I can do this via passing a Connection around in a ThreadLocal variable, and then having a servlet fil...

How to setup Maven to connect with CVS using public key authentication?

I have a section in a POM that looks something like this: <scm> <connection>scm:cvs:ext:myhostname:/cvsroot/repo:module_name</connection> </scm> I typically use publickey auth to authentication against this cvs server, although it should accept my password as well. When I attempt to run mvn scm:update, mvn release:prepare, or any o...

How to copy an ancestor to a descendant

Let's say I have an animal and now I want to make it a dog. How do I go about doing this in java? Right now I have a constructor that looks like public Dog(Animal animal) { this.setProperty(animal.getProperty); ... } While this works, it's fragile. Any other suggestions? ...