I'm trying to use these classes directly for the first time and not
quite getting the results I expect. The application reads a file
containing terrain altitude data and is supposed to display an image
with the terrain altitudes represented by different colours- green

hai happy diwali to all of you friends,
                    I did't get the meaning of Daemon  thread ,what is
daemon thread and what is the use of the daemon thread. plz explain it,
               I will feel very happy when i get this answer.

i have create a dll (my.dll) for my java program to call the functions
in my.dll
It requires external dlls, b.dll, c.dl to do further processingl...
right now i am able to run my java program calling the function in

Can u please help me?  I have McAfee Security system on my computer.  I
get the message that an update is available.  When I go to update, it
takes me to the Google page.  I try to log in using my log in and
password and it keeps comming back with a log in error.  It tells me

right now when i do from my servlets
System.out.println(...)
it goes to /logs/catalina.out
file. i've got several webapps and all of them send to

I get a NullPointerException error when trying to run my program.  I
think I am doing something wrong when copying the array, but am not
seeing what.  Here is what I have and I marked where the error is
occuring.

I am amazed at the following way transforming a Class into different
Class on the fly(Expert becomes Singer, Chef or Painter). Could you
throw in some comment for me? Is this called Strategy design pattern?
Now I do feel "has-a" is more powerful than "is-a".

I would like to know how many companies you work for are following the
recommended directory structure for J2EE applications, as explained in
the following link:
http://java.sun.com/blueprints/code/projectconventions.html

Hello everybody! I have the following question:
Given a double number, can I calculate the next closest double that can
represented from Java's float implementation ?
e.g. If I have the number

It seems that the Java Virtual Machine uses the 1:1 threading mapping
model. According to the theory of this model, all the threads
management and synchronisation are done in the kernel. In particular,
the switching between threads requires kernel intervention and system

According to the JNLP Specification, the JNLP Client can support
automatic obtain of just-in-time resource through a URL which may point
to anywhere, even a resource reside in a remote machine over the
internet. This can to some extent shorten the first launching time of

Hi friends I don't know how to use where to use and how to use
transient keyword in threads concept plz give me answer with small
example.

Please, how can I create Delphi like sets in Java?
In Delphi I could define set:
TAnimal = (aDog, aCat, aHorse, aSheep);
TAnimals = set of TAnimal;

I have Class A as superclass.
I have Class B extend Class A
Then Class C extend Class B
Is it possible to make Class A Extend Class D ?

I have been looking at this pattern and it does make sense to me,
except for one thing.
I thought Java was "pass by value". This pattern seems to me to only
make sense if it is using "pass by reference". Am I missing something