In my book (Murach's Beginning Java 2 JDK 5, p236) I read the
following:
"One benefit of polymorphism is that you can write generic code that's
designed to work with a superclass.Then you can use that code with

how can i change the value of a boolean in an ArrayList from false to
true?
public void crbCheck (String name)
  {

for(int i=0; i<3; i++)
 {
       List name**include 'i' in name here** = new ArrayList();    // I
want three ArrayLists:  name0, name1 and name2

How do I dynamically define and declare an array of FloatBuffers? I'm
trying to do something like the non-working code below ...
I'm confused because float buffer uses newFloatBuffer() to allocate
rather than 'new' like you would normally do for an array of arrays, *I

I am trying to see if a String matches the following:
^[0-9]+\/[0-9]+?
If it is not correct my intention is to make sure that the String begins
with at least one number followed by 'division' character followed by at

I have the following method to remove a String from an ArrayList. when I
try to run it I get a ClassCastException error. I have looked at lots of
examples of similar methods and I cant understand why this happens because
it looks right to me.

I'm still pretty new to enums and I'm struggling with how to do something
that seems like it should be easy, namely doing a simple lookup with enums.
For instance, suppose I want to look up the name of the day of the week,
given that I know the number of the day within the week. ...

What proportion of the RAM on a machine can you give to the java -Xmx
option?

I posted a message yesterday when I had problems with "Connection reset"
with a server and 2 clients.
When I studied the trace I found out that both clients ( on the same
host) get the same port. This is not good or? Should not each connection

I have this double linked list that. The nodes only have a
String as an instance variable.
What i want to be able to do is Serialize the double linked
list (the one with the methods addNode,deleteNode etc...)

My application needs a feature to detect whether a directed graph contains
circle. Does anyone know any efficient implementation? Which implementation
is the best (most efficient)?
thanks in advance & happy new year,

what does ClassCastException: mean?
         null

i am trying to get a .PS file from a html file.
I have gone through the javax.print api.I also tested the example given
for converting gif image to ps file.
But i am unable to convert a html file or simple text file to PS file.

www.physci.org/browserlauncher/
this link is not working.  Neither is the home page.  Is this
temporary?

Hello guys! my deadline's next friday, so i was wondering if any of you
could tell me if is there an easy way of sending a file throught a jsdt
chatChannel.
I've got a chat app written in java with chatClient, chatUser,