Iam writing a program that makes a star move across the screen and bounce
off the edges. The program compiles and runs but still not displaying star.
I think it might be a thread problem but not sure. Can someone please point
me in right direction.

I get the following error when I run applet. What am I doing wrong?
Thank You,
Andy
ÏException in thread "Thread-3" java.lang.NullPointerException

I create a border, then add it to a JPanel.  There are times, later, when I
want to change the title on the border.  I use TitledBorder.setTitle(), as
described in the API docs, but it doesn't change the title.  Here's what I
do:

Iam writing a program that displays my star and the star should animate and
bounce off the borders. When I try to create the rectangle to be the borders
of the applet I get an error with rectangle. Can someone please tell me
where I went wrong.

[code]
package ppowell;
import java.io.IOException;
/**

I am trying to learn Java.  I have a book that installs Version 1.3.1 of the
Java standard SDK.  I could swear a few months ago it ran fine on my
computer, but now I keep getting an error message even though I am trying to
run a demo program.  They seem to compile fine, but I get ...

Newbie,
I am trying to pass a variable across with a link ie it can be done
through php:
"<a href=\"showArticle.php?file=".$file . "\">

When working with JDBC, we create a ResultSet object with
"statement.executeQuery(strQuery)" as shown in the API.
BUT- How is this so ? I was taught that you cannot instantiate an Interface.
(Is there a different type that implements the interface being instantiated

Hi i have an xml file as follows:
<ConfigDataFile>
  <fileHeader fileFormatVersion="D02.00.11" fileType="necb"
cfgVersion="2" baseCfgVersion="1" swVersion="1.1"/>

Do You know any UML modeling plugin for eclipse that I can draw classes  
and it will generate the code for me?

I made a square out of a polygon and when I click on one the color should
change for that polygon only. I made the polygon and then transcoded it
whith a loop to make tic tac toe board. The only square that I can get to
change colors is the top right corner one but when it does they ...

Is there a portable way in Java to determine if the machine is idle?  i.e.
there has been no mouse/keyboard input for a given amount of time.  I have
had a few ideas but unsure how to do any of them:
1) detect if mouse has moved or key pressed and do timing myself - but how

I want to use JDBC to access DB2 database. I also want to display the content
of a specific table (table name is configurable) into web page (just like
what is displayed when we use command line "select * from <table name>" on
the console). I am wondering whether there are any ...

I have an application that is running as separate JSPs and servlets in
the webapps directory in Tomcat 4.1. I need to migrate this to run on
our existing installation of JBoss 4.0.2. Can I simply copy the webapp
files from "C:\tomcat\webapps" directory to the

In company I am working we have wide variation of FlatDataFiles and
pretty much what we are doing is process those files and create another
bunch of flat files.
What I've done is past (and present) is to create a class structure for