If you compare an abstract baseclass and an Interface and you only look at
the datamembers what exactly is that
differ or is the same. For example can you have datamember in both or just
in one of these.

I've been getting the dreaded and oft discussed
"java.lang.UnsatisfiedLinkError" exception...
---------
The Java:

Hello List
(I am not sure, if this is the right list for my question, but
"comp.editors" does not seem to be the right place either??)
Here is my Question:

I have JDK 1.4.2 - Following code compiles and runs file using
javac and java DESCryptoTest
But when I try to execute it using jview I get
java.lang.NoClassDefFoundError

Could I construct an object using class class?
For example, I want to construct Integer("8") using class
Class class=Integer.class;
How to use class to obtain an Integer I which is equal to new

i need to make a chat, (server and client), in JSP. Does anyone has
source code for this?

Please don't flame me if this is a FAQ.  How do I force
byte/short/int/long/etc. to be unisgned (i.e. the signbit is treated as
2^n instead of signbit-1 being 2^n).  The specific application I have
is using a calculated byte value as an array index and due

Can anyone explain to me what is callback method? Any example will be
highly appreciated.

I'm building an app that includes an email send and response requirement.
In order to identify the email response I'm wondering what the best way is
to embed the 'send and response' transaction ID in the email?  For example,
can you add a custom entry to the email header area?

I've set-up Apache to authenticate using htaccess and MySQL.  That part
works great.   I'm trying to figure out how to get access (cgi? php?
server config?) to the user_name provided in the login pop-up box to
personalize the pages seen by that user.   After authentication, are

I'm readaing a book about Inteface and it says the following.
"Only constant fields(public,static and final) are allowed in an interface.
The public, static and final key words may be
omitted, but alla fields are still treated as public, static and final."

I am working on a little game in J2ME MIDP 2.0.
The player (a sprite) is moving very slowly -
it seems like that it doesn't recognize all buttons that have been
pressed - if I put the thread to sleep for 500 milliseconds,

how can i know my ip of the dns server in java?

Group,
New to Java, but certainly not to programming. I am trying to find an
approach to this problem using Java (already solved with Perl, but I
must port):

I'm very new to Spring Framework and just trying to understand and get
hold of it.
My manager just told me that the application's applicationContext.xml
file is too big and it needs to brake down into modules.