Short question : I wonder if it is possible to subclass the
java.util.EventListener interface and create a customized event
listener. This should also involve subclassing java.util.Event. Could
someone explain the mechanism to make this work?

According to the Java FAQ,  ICMP ping is not possible.
http://www.ibiblio.org/javafaq/javafaq.html#ping
But how does this Java Applet calculate the Round Trip Time?
http://www.vonage-forum.com/voip-speed-test/

Are there any efficient algorithm for generating Primes with about
50-100 decimal dight?
Thanks
Steve

I'm a total greenhorn in this language and my lecturer threw me an
assignment to do recently. It seems like I have to create an
interactive Salary Computation program that calculates the gross
salary, net salary for a set of employees (a loop is needed for this

Sorry,
Hit "New Post" instead of "Create Mail"
My mistake

I am making a vector of arrays.
What I had hoped to do was the following.
Given an index and an array, I wanted to add the array to
the vector at the specified index.

Al,
I have decided that I want to get a laptop of my own - not one purchased by
BOL necessarily.
The biggest reason I want it is to do work at home and be able to transport

I want to replace the newline (\n) and the tabulator (\t) character,
because the server must receive a text, that doesn't contain this
characters. The server reads with BufferedReader.readLine()  /this
function reads a text,that is terminated by a newline/.

How do I specify that a DecimalFormat should ALWAYS prepend the decimal sign?
I thought DecimalFormat("-00000.00");
would be ok, But in that case a negative number will start with a double minus:
--0034.56

I want to write the socket program to send SMTP email, without using
any JavaMail API.
Here's the program, but it turns out it has the following exceptions: I
don't know

I have a command line java application, which provides me all the
output on the console/cmd. However, I want to log the whatever output
is coming to a file as well so that I can go back and see the file
after some days if I need. So, the output to console as well as to a

a String is a reference type correct?
So if I want to compare two strings I have to use string1.equals(string2)
correct?
If I use the == operator I am actually comparing the address of the data,

Can someone point out a few servlet design patterns and general
observations when it comes to such development?
I'm familiar with the common one of having a servlet for every webpage,
but I'm trying to come up with a way of adding new webpages to an

This should be easy:
I want to create a single jar file with my classes plus those from a 3rd
party. The 3rd party classes are already in a jar file of their own. What
is the correct way to combine all these into a single jar? How would I

Is it possible to compile 1.5.0 sources, but ask the compiler to throw out
anything which won't run on anything later than, say, a 1.2.0 JVM?  For
example, even though generics require the 1.5.0 compiler, they don't need
the 1.5.0 JVM, since the compiler generates the appropriate ...