how to build a viewerframe on my website?

i m making a project in which i m using jsp as front end, java servlet,
java beans and mysql database.
now when i enter user_id and password on my login screen(jsp page) it
authenticates with the database. if it matches its ok but if not it

I read in a magazine (Dev IQ) that finding out the type of object at
runtime is not a good practice. If you are using instanceof a lot, then
your object model should be reviewed. The design of your application
should be changed. I assume the case goes with reflection also.

Are arrays of primitives, such as byte[] full-fledged Objects?

right now i m using
<% if (request.getAttribute("Error1") != null) { %>
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp
       <font color = "red"><%= request.getAttribute("Error1") %>

I'm trying to work with an existing database schema and am having
difficulty with the mapping documents to allow me to persist duplicate
data to a table.
I have an ALBUM and a TRACK table. The business logic tells me that an

Where in the Java language specification or API is the idiom
"Foo.class" defined?  It's not an attribute of any class I can find,
and I can't find it in the core language specification.
Thanks.

Looking for suggestions on a book that explains the J2EE environment and
components in simple terms, plus explaining how they interact with each
other.  Coming largely from a Powerbuilder/Oracle background and understand
Java code pretty well, just looking to fit the puzzle pieces ...

I've written a little program that takes two strings as input.  It
converts the first string to an integer index and then applies that
index to the second string, using the <charAt> method of class
<String>.  I wanted to check for the possibility that the index might

I am using a Date selector component that allows the user to visually
select a date (day-month-year). But there is a slight problem I am
facing:
CalendarChooser objFromDate = new CalendarChooser () ;

how to model a train system to include track and, to begin with two trains.
at present i have implemented using a vector two train objects fit into
vector at different positions and each has a move method which changes
postion +1 and replaces old position with a "empty block". (when ...

is there a 'big square root' feature to find square roots of BigDecimal
numbers?
thanks

Hello, How (if possible) can determine the compiler used to compile a
specific Java .class file?
Thanks, - Dave

I am using the axis SOAP monitor and the Tomcat / SOAP tool plugin for
Eclipse.
When users are testing our App, if they get an error, I can see the
SOAP request message, and I would like to cut / paste it into the

Does anyone know how to construct a dialog for files that are on a remote
ftp server - something like a JFileChooser? Thanks, Ike