Am trying to learn. From Schlidt's Java  A Beginners Guide entered
Swing program SwingDemo p 567 and seperately ButtonDemo p 574.
Both compiled.  But runing both gave same error message :
 Exception in thread "main"  java.lang.NoClassDefFoundError

It is an array problem.
I have the program almost finished but having a problem with it compiling at
this point. I followed everything that is has in our book just changed the
names where I need it to I wanted to get it to work before I added to it I

I can't figure out to check whether or not a string contains any
non-numeric characters (to 'pass' my filter it can only contain chars
from 1 to 9, that's it...
I read in OReilly Learning Java (5.0), chapter 10, which deals with

This appears to be an old problem as I see some posts about it but no
clear solution. My wife's computer is running WinXP Home with a 3G
Celeron processor. With two java games (one I have written and one
jigsaw puzzle online) mouse clicks are ignored about 5% of the time.

I am working on a server which receives a request, processes it and
stores the result in a db. While investigating its performance I noticed
that there is considerable variation in processing time. The data and
amount is the same every time. I logged the different processing ...

I am trying to create the "user interface" part of my BlackJack school
assignment and i am continually encountering
"<identifier> expected"
compile error.

I'm trying to call method query() in class ObjectContainer.
// this is from db4o.com
public interface ObjectSet<Item>
extends java.util.List<Item>, java.util.Iterator<Item>

//template for checking combinations of card
import javax.swing.*;
public class template {
   public static void main(String[] args)

I thought I had this right, it didn't seem that complicated, but I can't
get it to work..  I'm trying to loop backwards, i.e., start with last
element in array and end in the first element..  so what made the most
sense to me was this:

 I have a curved image and I want to measure the length of this
curved image. Can I do this without straightening it out ?
If not, then how to straighten the image? For example, given a curved
image like a "S", how to straighten it out to form a vertical line ?

I am just trying to entertain myself in java to keep myself interested
in learning it. I want to create a square, and every time I press 'Up'
on the keyboard the square size increases. I can draw everything, but
I am unsure where I would go from there...any hints?

Hi all, does ant have possibility to handle errors ?
To be clear, i try to use oracle ant ext to redeploy oc4j war/ear
application
Ant when app is not deployed "redeploy" task throws me failure --> i want

I am uploading the image of the assignment if any of you will help me
it would be of great help
and the assignment date for me is 18th Nov
[URL=http://allyoucanupload.webshots.com/v/2001258677840210673]

i have a little problem here finding out how to use registered
services in OSGi.
what i am doing is the followig:
- register/provide services with

I more than likely have to reverse engineer one of our applications
(see the subject line). I have been looking at Jad and JCavaj and the
like. I was wondering what percentage (roughly) of the source I would
get back running it through one of those. Any experience?