Until now the class is sweet and dandy. Now I want to implement a
function, so that when the user fills in his emailaddress and password,
the system generates a unique id for this user. How can I implement
such a function? Please help.

This is part of the code(JDK 1.5 ,windows xp Chinese(simplified))
...
Vector v=new Vector();
v.addElement(new Integer(7));

Until now the class is sweet and dandy. Now I want to implement a
function, so that when the user fills in his emailaddress and password,
the system generates a unique id for this user. How can I implement
such a function? Please help.

I'm a budding programmer having a year's expeience in java Swing programming
although I have some 2 years experience also in VB6, and would like to gain
some training in j2ee.
Could anyone recommend a training course, book or any resource where I could

I want to generate sitemap.xml dynamically when users access
http://mysite/sitemap.xml. What's the logic to do that other than
creating a servlet?

I am using UML Class Diagram to do data modeling.
The question is then how should I translate it into Oracle database
design ?
In the Class diagram there are operation/method, where should I

there's an original definition of a socket at the following URL:
http://java.sun.com/docs/books/tutorial/networking/sockets/definition.html
The page is called "What is a Socket?" and the description is not long.
The author states that:

I'm trying to write a method to poll a quasi-real time system for
various data via UDP. What I need to do is send 10 different messages
over a period of 10 seconds with each message send operation separated
by 1 second. The system then responds on another UDP port.

In my chat program, I want to create a Vector in my
Server, in which all my clients will be inserted.
My Server run in a thread, but not my Clients: they're
just instances of a class.

Lately I have been conducting technical interviews to fill some Java
developer positions, and this process is becoming highly frustrating.  Good
candidates are very hard to come by in the Atlanta area.  I don't know
whether there is an actual shortage of Java programmers in the U.S. ...

I am just curious what is the purpose of the Java inner class?  It
seems it is mainly used for listener or for GUI development
For other who have been developing java application, could you give me
an example when  or how you could use the innerclass. I am trying to

I am using getRuntime.exec() in Jframes, and running another another
java file by the exec() functions, the java file produces another file
after running. Now I need to display the output of this file on the
JFrame, but the output file contains null value until and unless I exit

    A few months ago, a post was asking how we can open a document on a Mac
OS X from a Java application.
Since wednesday I try to use all the methods proposed and found on
internet, without success.

Consider the following program of creating a new thread extending
thread class.
//creating a new thread extending thread.
class NewThread extends Thread {

I am bumping into a problem where JAR's supplied to me were compiled
using JDK 1.5, but I have a feeling that the JVM on my machine is only
1.4.x.  That being said...when I use JNI in my C++ code, I'm getting
the following exception