Hello--I am new to Java and having trouble with the Create a class of
objects that will store and work with 4-bit binary numbers You can
choose to store the binary data in your class any way you like (i.e.
four Boolean variables, four Byte variables, one Int variable, String

Excuse my ignorance - I'm coming from the other development environment :(
Is there a way to specify a function parameter as being optional?  I
know C++ has them, and PHP parameters are all optional, but I can't find
anything about it in Java.  Thanks in advance.

Hello--I am new to Java and having trouble with the identifiers that
are expected in catch statments. My compiler is telling me that it
doesn't recognize the symbols that I give in catch statements, but I
can't find a site online that explains how the identiers work. I am

I'm trying to implement either JOrbis or JLayer as the music player in
a game project I am working on. Unfortunatly the JLayer API is outside
my capability to understand without an example, and JOrbis doesn't even
have an API. Does anyone have an example of what code for either

I am trying to read the html source of a web page, and finding all the
thumbnails and linked addresses within.
The code below works, but with one strange exception: if I test it on a
html page, I get all the links except for one.

My client block after typing the first input...any ideas?
import java.io.*;
import java.net.*;
public class Server {

I don't use Java, but I need the definitions of two concepts used in
Java, they are: "Changing References" and "One Token Look-Ahead".
Can someone kindly let me know~ Thanks a lot.

I'm doing some xml stuff and have gone down the road of writting a sax
parser to get data out of the file.  I've over-written the startElement
and characters methods and I am getting the data I need... kind of.  I
am not seeing an easy way to detect where I am in a nested structure

Hi. I am trying to write a java application where you can load a
dialogue and send an email about a technical problem to the system
adminstrator. All the website says i need to import
com.jscape... but jscape doesn't exist. What do I do.

Using JDK 1.4
Folks would be great if you could help me out here :
Lets say I have a file called Sample1.java under
<directory>/a/b :

I started a new job recently for which I need to learn both beans and
taglibs (at my last job also did JSP but they didn't use beans or taglibs..)
reading up on this in oreilly (JSP, 3rd ed.) I find following beans code:
<jsp:useBean....>  etc.. but where I work they do stuff like:

I have an application which uses many Point2D.Double objects, and now
that I am trying to write code which saves objects from the
application, I discover the whole mess with Point2D.Double being not
serializable since 1999(!).

I have written a Java Program. Server & Client classes opening prior
Socket object. My question is that when I create a server socket on my
computer, client class from any part of the world who knows my IP
address and port no. can connect to that server socket on my computer.

In our app we use junit as part of it. However in order to make
necessary performance improvements
we need to remove this dependency. I have started to write classes with
the same name as used in junit . I need advice on how to do this. I am

I have a java programm which shall open a Browser with a certain URL
AND!!!!! if this browser window is closed from a use after a while, the
java programm should be informed about this.
The following code is what I did. I am able to open a browser OS