I'm writing a web server in Java for html and servlets.
when the server receives a GET request, it works fine.
problem: when I use POST, the server program stops and the submit button has
to be clicked another time or the page has to be manually refreshed (after

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Is it possible to configure JPA to inject EntityManager or
EntityManagerFactory on Tomcat?
I'm reading
<http://openjpa.apache.org/docs/latest/manual/>

I'm new to Java so if this is the wrong group to post this question,
please point to the right group and TIA.
I need to reformat a datetime coming in via a variable.
If comes in the format of the following

I would like under Netbeans, to add a picture in the project, either in an
Image package, or at the root of the project sources. But I cant find how to
do this! I can create a folder or a package, then I find no menu option to
insert the PNG file, and drag&drop does not work.

"Create an abstract class with no methods.  Derive a class and add a
method.  Create a static method that takes a reference to the base
class, downcast it to the derived class, and calls the method.  In
main(),demonstrate that it works.  Now put the abstract declaration

I just started taking a Programming With JAVA class and we have a lab
to do, and I just can't figure it out.
First, I am supposed to ask the user for a 4-digit number (I think
this is correct):

I've been using Java for quite a while, but I'm fairly new to applets.
I wrote my main program, as a panel and several other classes. Then I
made a driver to run it. It works fine that way, but I'm trying to
eventually get my program onto a webpage. So, I made an applet to call

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Is there a database I can use with my java application that does not
"install" on a user's PC?
To give more details....
The java program will be "installed" on the client PC by unzipping a

I just woke up with some panicky thoughts about serialisation. Some
people dream about women; I dream about Java.
1. If a class does not have a no-arg constructor, how is it possible
for serialisation to reconstitute the object?

I tried to download JBoss at http://labs.jboss.com/, but I can't find
a link to download JBoss.
can anyone please tell me where can I download JBoss (for windows)?
Thanks

I'm writing a web server in Java for html and servlets.
when the server receives a GET request, it works fine.
problem: when I use POST, the server program stops and the submit button has
to be clicked another time or the page has to be manually refreshed (after

I've just discovered something I didn't know about.
If I have, for example, class javax.servlet.http.HttpServlet.
I make my own servlet, MyServlet.
I overload doGet() thus:

I'm relatively new to java so I apologise if this is a simple
question. I am trying to detect when the system date changes so that I
can start a new log file for each day. I have setup the code to create
a new log file etc. however I can't seem to find any information on