I have a singleton class that accesses a database (using jtds as
database driver).
class DatabaseAccessSingleton {
  private static DatabaseAccessSingleton instance;

I have a set of n-tuples of data that I want to persist. The data is
really just for reference, no updates, although I'll need to maintain
it occasionally (after the initial setup, batches of new data to be
added). No complex queries, just searches for an individual n-tuple but

Anyone know why I get even though I have commons-beanutils.jar in
C:\Tomcat\server\lib? This seems the case with lots of jars. If I move them
in one folder (common/lib) it can't find them in the other.
javax.servlet.ServletException: Error instantiating servlet class

I'm creating an Ant script and trying to have the Java code compiled
with version 1.3 instead of our usual 1.4.  I have both JDK 1.3 and 1.4
installed on the build server.
I've tried setting <property name="build.compiler" value="javac1.3" />

We have 3 JVM installed on a 4 CPU server running Windows 2000 server.
JVM is Sun 1.4.2_04.
Under constant load, the cpu usage is SLOWLY increasing from 5% up to
100% in 20-30 hours. The cpu increase is not linear, but parabolic.

I'm using Struts to build a webapplication. Below is a snippet of code
from one of my jsp pages displays the folders of a user. In front of each
folder is a checkbox, so that all checked folders can be deleted at once.
I'm wondering, is it possible to have more than 1 submit button,

I'm trying to create a single page, the user will go directly to the
page without submitting a form. The page however, needs to do some
processing before the page is displayed.
Specifically, I'm creating a "SQL Status" page. It connects to an SQL

Does Java have any internal support for playing movies like MPEGs?

I have my xml file which looks like this:
  <?xml version="1.0" encoding="UTF-8" ?>
- <enatureArchiver>
- <archive name="music">

if want to pring a line just "hello world"
on my printer so how can i do that ??

I have these objects that I want to put into a hash, and then be able to
pull them out based on either of two criteria, both Strings.  So what I've
done is to make a Key class that has both of the Strings in it, and the
"equals" method on the Key class will return true if one String ...

I have one web application (Tomcat/Java/MySQL) and i want to get the
number of users who are currently accessing the application.
Also I want to get the user details of each user, which is stored in a
database.

What exactly is the difference between Geronimo and Tomcat? Is Tomcat a
subset of Geronimo? Which should I use?
Thanks.

I have to create reports that will display information from a database
(mySQL database). At the moment, I use jfreereport. However, that format is
not so nice. Is there any better choice? Can export to MS Word document?
Thanks for any help

I just started to find out that I can write programs in Java for my
cell phone. I just started but it is hard to find examples. Does anyone
has an example. An ideal example maybe would be a simple calculator or
something.