I'm searching for an indexed based priorityqueue (like in Sedgewick
Program 9.12) in Java.
My Intention is to update the priority of the nodes or delete a node in
the queue, without scaning everytime the queue. (i.e. access via index)

I want to develop a calculation engine to perform various calculations,
using the J2EE framework. Although at first sight, it seems like it does
not make sense to have more than one calculation engine, scalability may
be an issue so I would like to have a pool of these engines ...

I'm a newbie a bit confused about technology collocation of beans. Are
them a part of j2ee or j2se?
In http://www.tusc.com.au/tutorial/html/chap1.html, a j2ee project (with
beans) is created using j2sdk1.4.1!?!? Shouldn't be called a j2se

So far, I have been programming my interfaces by picking the available
Swing components in my IDE.  Sometimes, however, a programmer needs a
richer visual interface.  I have always noticed that the standard
(compiled, non-Java) Windows programs tend to have a more professional

I am currently using the following setup:
Server:
JBoss 3.2.2 (default context) on a Windows XP-Pro box (1 Network card,
fixed adress, in DNS-Server) under Java 1.4.1_02 (Sun-JSDK), Database

I am working on an EJB-based commercial product. When done, it will be
deployable on a number of application servers that use different XML
descriptor files, with different content. Initially, these will be JBoss,
WebLogic and Sun ONE AS v8.

I can't make a simple form authentication! Can somebody say me what i am
doing wrong?
I am logging on successfully, but the result Subject is not propagated to
the web container

All,
I've been reading a ton of posts on this subject and have not found an
answer.
I am using WebLogic 8.1.  I have an application with a bean whose

Is it posible to have a Java type of String and a postgreSQL database
type of inet using XDoclet tags in the JBoss-IDE (or without the IDE)?
Groeten,
Joost

Can anyone tell me what the xdoclet tags are for a unidirectional 1-1
relation between a Customer and an Address in JBoss?
TIA
Joost

I've got a very strange problem with a Websphere 5.1 cluster attached to DB2
database in Mainframe z/OS.
I have a J2EE deployed application running normally fine agains the DB2
host. But, sometimes, the application stop working. In the moment that

I'm using WAS 5.1 and a bean TimedObject that use TimerService and other
classes of EJB 2.1.
I found that WAS has not these classes in its libs, so I can't deploy or/and
run my application.

i use the identity map pattern [Fowler PoEAA] in my project, to
store/cache many domain objects there. But what happen if the
persistence data (sql) change? The user will still use some domain
objects, which are no more up-to-date. I can solve that, if i use a

We have a EJB project that contains about 10 EJBs that are common to
most of our web and client applications. As the EJB are generic, so to
speak, this is packaged and deployed as the only thing in the ear
file. Everything works fine except for when we need to change any of

I am having a problem with a web service client calling a web service
residing on a JBoss 4.0.1 SP1 application server.
The web service has single method, sayHelloWorld. It does not take any
parameters and returns "Hello World !!". The client and the application