I am very keen to start learning a new programming language and have
chosen Java as it is more productive than the previous language i have
learnt.
I have chosen a book to start learning from but the CD Rom is missing

  I have a Java applet that slows down to a crawl whenever the mouse
is moved from within the drawing canvas to somewhere else.  Has anybody
seen this strange behaviour before, or know what might cause it?
Thanks in advance for your help.

I have  monochrome image in 12 bit raw data. It's actually video being
sent over a stream.
Can anybody give me a hint on how I display the image on a canvas. I
converted the bits to a short, but now since it's not RGB format, it's

I had a few pages coded using pure JSF and everythign worked fine till
today...because one of the step has to forward to a servlet first and
then the servlet forwad back to the next JSF pages.
The problem is this.

I want to run the system commands with java in Linux environment.
For example:
"   tar -cvf test.tar ./test/*   "
"su"

I'm using struts for my web application. I have a tree structure
displayed by using JSP. I have implemeted the functions that can expand
and clap the tree. The only problem is that the tree is big. If I
scroll down a page to the middle and expend a node there, how can I

I have a Java class ToolBox inside the file ToolBox.java, which has many
static methods. I put it in(Linux OS): /home/Xiaoshen/programming/java/
Now if I have a file in the same directory, I have no problem in using
ToolBox's static methods. For example, in the file Test.java, I ...

I'm working on a rather memory-hungry application. There's not much I
can do to make the app use less memory, but I'm hoping that at least I
can find a way to handle low-memory situations better.
Currently, when memory runs out (typically as a result of a background

Does someone here know where to find the mathml.jar that could have
been generated by XMLBeans over at least the MathML2.0-presentation
schema?
thx

does someone know if its possible to access a printer in the network,
which is reachable via the IPP-protocol, by JPS?
Thanks a lot for an answer.
Regards - Thomas

Below I do start Thread t1 before t2. t1 tries to call print1() on a
Printer object and t1 print2() but only the first will success since it
obtains a lock on the Printer object. I'm surprised that although t1 is
started first the code prints "2". If I put a sleep(5) between the

I am trying to create a .jsp page that uses the h:outputText tag to
display some text that is nested within a div.  I want the text
rendered only when a backing bean has a certain value.  For example:
<f:subview id="map">

could you please recommend some library which provides text user
interface in java 2? I'm looking for something similar to TurboVision as
in Pascal.
regards,

I hope my subject line is close enough.  Assume a JSP file that calls a
static function "A" on some class.  "A" then goes down the stack
looking for what class called it.  It then tries to get a Class object
for that class with forName.

I'm trying to clean up all of the compiler warnings in my projects but I'm
getting a few I don't understand. I'll post each one in a separate thread.
I've cited the first of these warnings in my Subject line.
What does this warning mean and how do I get rid of it?