I am taking a course in java programming as part of my B.Sc in computer
science
And for the final project i need to create a sockets based multithreads
server

Hi, Is it possible to change an access modifire on runtime?
consider this example:
public Class Test {
     Test (boolean isPublic,...){

I'd like to find out if Jasper reports supports common includes, such
as header, footer, and style information.
We will be creating many reports, and if at all possible I would like
to avoid having to replicate header/footer/style information in each

I'm using the struts validator framework to validate an email address
in a form.
If the user enters an invalid email address (ie
invalidEmailAddress.com) I'd like to display the following error

So my question is if I build a JFrame can I use a button in that JFrame
to open a .java file in the same folder?

I am porting my application from 32  bit linux  to 64 bit linux.  For
my application i am using JDK 122 and JDK 144.  Do these versions have
downloads available for 64 bit linux.  If yes, Please let me know from
where i can get these downloads,

Whenever I look at an open source code, I see people write com or org
in their import section.
i.e.    import com.blah.blah
        import org.blah.blah

I would like to use some of the new functionality in JDK 1.5 and 6, but
I have to run under 1.4. I've managed to duplicate the needed
functionality in 1.4 using an inefficient method.
If my app is running in 1.5, I'd like it to use the native function,

i am doing a project using JavaMail API with JSP and James server
i have implemented sendmail,compose. but i wanna know how can i
implement sentmail as it is seen in the real application.
I wanna know what can i should do to retrieve the mails sent from an

Somebody may have missed it...
Groovy 1.0 is here!
http://groovy.codehaus.org/
Get it, try it and spread it!

I encountered a very strange problem, when I tried to understand how
JNI works with strings.
Let me beginn with some code that does work!
--- START: Code that does work! ---

I have a string like (A AND B OR (C AND D AND E OR F)) which has to be
put into a tree. The number of children any node can have is variable.
For the above expression, I'd like to have a tree which looks like
this:

     New to Java! Trying to automate searhing Google, Yahoo, MSN, AOL
and Ask by sending queries to those engines using a java program and
storing the returned URL's in a MYSQL database. The program will open a
text file, upload the first line as the query, connect to each of the

My table has 5 columns.
I want to set column width for the first 4 columns. But for the last
column, I prefer to have it auto sized width, therefore the table total
width is maximized and does't not appear horizontal scroll bar.

             How can I connect a DataSink to a Socket in java. I want
to send data read from webcam through socket to another computer on
network.