I wish to nest one message inside another. I thought about something like:
ActionMessage msg = new ActionMessage
               (
               "error.field.notValid",

It's my first time running an object oriented program (Circleprogram.java
and Circle.class), and I have a few questions.
Do you have to compile the actual java program (in my case
Circleprogram.java)? I actually tried to compile the program, but still

Since an Enum is a class, is it expected that
you put only one Enum in a file? This could
make for a whole lot of files for some applications.

We are deploying a java web start application that has been programmed
and delivered to us by an outside vendor onto several machines that
are shared by different users.  
All of the users log onto our network and authenticate to a windows

I am trying to initialize my webapp using ServletContextListener.
How do I inform the Tomcat container that there was an error in
contextInitialized() and hence not to make my webapp available ?
I am using Struts in my webapp. Is it a good idea to do initialization

I am reading a file and checking each piece of data.
If there is something wrong with the data, I do this:
throw new IOException("Cell type not NUMBER at row = " + ix........");
How does one decide if this is the sort of thing that

I am implementing a JAAS LoginModule in a Tomcat environment, and have
almost everything working.  The problem that I am having is that I
cannot access the Subject from within servlets and JSPs.  I have tried
the following:

Hi, my company is considering using struts but it looks like it would
be hard to use it for a project with multiple developers since you have
a central struts-config.xml file.  Can you tell me if this statement is
right or there is a way to use struts in a multiple devlopers

Is there any jdbc driver for mysql that dont require
the program that uses the driver to be gpl or some other
open source license?

As I'm sure you've noticed, there are still people posting asking how to
get their Java programs compiled to work on MS JVM.  My question is why
do people want this?  If it is for applets, why not use the Sun java
plug-in?  By using HTMLConverter or <jsp:plugin>, HTML code is ...

how to avoid inserting duplicate key to the table?
For example, the EMPLOYEE TABLE has field EMPID (primary key) and NAME
In the Java program, if the following sql statement one by one, it will
throw SQLException.

i need some ideas before i'll get my feet wet.
Situation =
i have to parse n logfiles from one whole day.
Those logs have lines with a filename and 1 of 3

Hello!!
I'm reading a book about Java and there is something that I don't understand
so therefore I ask you out there.
It says "For example UNIX Runtime objects might support the getenv and

In the little program below I can use
Size.class
for the first parameter of valueOf() or
Size.Large.getDeclaringClass()

how can I merge these requirements into one regex?
string shall be comprised of chars from following sequences: A-Z; a-z;
0-9
string shall at least have 8 chars