May I assume that a stack is thread safe since it extends the
synchronized vector class?  
Thanks.  

    I have a question regarding System.getProperty().  Is there a
possible way to obtain environment variables such as PATH or
CATALINA_HOME using getProperty?  If not, is there any possible way of
doing this?  Any help would be greatly appreciated.

Is there some way to implement KeyListner and override its methods in
core java without using AWT/Swing components ?
If yes, how ?
Thanks in advance.

I am new to java programming and also to this newsgroup ,. I am actually
following Java courses now,
I had a few homeworks which Im unable to do ,
hoping to get some help from you ,

Can anybody tell me how i can get a list of existing files in a directory
and a list of directories in a specific directory?
---
Outgoing mail is certified Virus Free.

I'm now getting to the point where I need to figure out how to do
profiling in Java.
One thing that bugged me about the standard profiler in python was
that it had no way of accounting for time spent in other processes,

I am wondering when to use objA.equals(null) and objA == null.
What is the difference?
BR
//Mikael

I've been experimenting with BufferedImage and am attempting to extract the
individual R, G, B, and Alpha values from the color of each pixel in an image.
This seems simple and straight-forward, but somehow I got slightly confused. I
managed to figure out how to extract some large ...

I'm using       Process runner = Runtime.getRuntime().exec( cmdArgs );
where cmdArgs {"/bin/sh", "-c", <perl program>}.
If <perl program> is "/opt/vr/bin/show_active_servers" I can get the input
stream and read what the perl program outputs as follows. In fact it works

Hello java group,
 I need to use Java to compute the following forumla:
p = c / (1 + y)  +  c / ((1 + y)^2) + c / ((1 + y)^3) + ... c / ((1 + y)^n)
p,c,n are known and we need to calculate y.

The current matter is quite simple:
I got a "int z" variable, which represents the ascii code of the char I
need. How do I transform it into a char?
The goal should be queuing the wanted letter to a string, a nice funtion

I have two classes CardA and CardB that have a lot in common but with
some differences. Since a lot of code is duplicated my task is to remove
and find a solution to handle this.
CardA has implements two interfaces that CardB does not have. CardB

I don't know much about Java, but we are having a problem on our
website.  I don't currently have the actual error message, but I'm
just wondering if anyone can possibly point to where the problem might
lie just from this information.

It's a bit hard to try to explain what appens with my program, but I'll
try:
We have a checkers game, and the problem is when I have the CPU playing
against itself

I am using Java DataInputStram and DataOutputStream to send a large file
thorugh Internet. When I test it with local LAN, the speed is fairly
fast and acceptable. With the same testing PCs and programs, I send the
file through Intenet, using ADSL boardband modem. I found that the ...