Does anyone know a Ping Class in Java
to do a simple "ping" on a server and reading the response?
Didn't find anything usefull up to now.
Thank you in advance!

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This is hard to explain but I'll do my best :)
I've created a little game and at some point I needed to make images

Hello, I'm new to Lucene and would to have your advice about index
rebuilding.
Whenever I try to recreate the index, I need to close the current
IndexReader (I use only one IndexReader instance for all that web

I'm trying to learn how to use a new tool called JoSQL available at the
Source Forge project. Link: http://josql.sourceforge.net/
In the main file, the query.parse() appears to have trouble finding
the person class. Can anyone shed some light on this?

I have used applications which search through image files, look at the
picture, cross reference and generate a list of images which it considers
similiar.  Sometimes it would be way off, but it seemed like for the most
part there were a lot more false positives than false ...

I am not a complete newbie, but do not have enough knowledge to know
the "best" way to handle the following. Your suggestions are truly
appreciated.
The client has an existing legacy system. Large data files are

I am having quality problems with resized gif images. I wish to resize
images down to sizes between 100x100 and 200x200 from larger images but
the quality is not acceptable.
the quality of the image is fine if I just load it and write it back to

I'm trying to learn how to use a new tool called JoSQL available at the
Source Forge project.
Link: http://josql.sourceforge.net/
See below:

I tried to make a batch file for compiling Java programs.   It looked
something like this
echo off
cls

Does anyone know how to print out a loading tag in a servlet while something
is loading then displaying the content when it's ready? Is it something like
out.write instead of out.println?

I wrote up this piece of code.
   public static void printHex(byte[] A){
String Digs = "0123456789ABCDEF";
for(int i = 0;i<A.length;i++){

Vamqh.com seems full of dead links.  IIRC I once read there about a
way of recovering direct nio buffer RAM space.  Does any one more
informamation on this?

Does anybody know of a good way to determine the PID for a Linux system
process from within Java?
In other words, in my application I want to determine if mysql is
running. Should I do this by 'Runtime.getRuntime().exec()'? Is there a

Ok, I am trying to clear the black box in Java.  For example, in basic
coding, you can almost always use Cls in some form to clear the screen.
Does anyone have any suggestions?  I know it may sound noobish, but
I've never had to really do something like that before.  Also, what are

I was souping up the nio entry in the Java glossary.
I wondered if people had rules of thumb about when direct buffers or
memory mapping might give better performance.
I would have though memory mapping would only apply to random access,