I have a DLL which is built in C++. This C++ DLL has a JNI Interface
and the methods are called from Java.
I want to know how to define the default / Optional parameters in C++
so that they can be called from Java.

Is there anyway, I can get the computer name. I know well of this program:-
public static String getComputerName(){
 try{
  return InetAddress.getLocalHost().getHostName();

Is there anyway to read a number in from a file or similar as a String and
use it as an int variable i.e.
String s = "123";
int i = s;

Dear java programmers,
I don't really understand how this Runtime.getRuntime.exec(...)
execution command works. i would like to know if the execution has
finished (at least knowing the status) in order to continue my

I need to make copies for a class A. Do I have to implement Cloneable
and use clone? Can I just make a method called copy, which returns A,
and use it to do copy?
Thanks!

I'm Hee-Chul Moon from South Korea.
I am developing multi-file(about 100~10000 files) sending/receiving
system in Java.
I wonder how many client sockets can bind to a ServerSocket.

I'm writing a JSP/Servlet web-app for transforming mnemonics into URLs,
similar to what http://tinyurl.com does.  In other words, if the
mnemonic "xyz" points to http://google.com, then entering
http://example.com/xyz (where example.com is my website) would

I'm planning a Java tool that handles some calls to CVS.
How do software tools "typically" integrate with CVS?  Is it just a
matter of executing the cvs command (say, via Runtime.exec()) and then
capturing and parsing the output?  Or is there a neater way of

J2ME Wireless Toolkit 2.2
JDK 5
When I run this midlet (see source code below) it crashes when I select the
"Molar Converter" menu item

Dear Java programmers,
I would like to know if it is possible to run Java forever in background
(something like java.... & ) for exemple a Server. Let's suppose a Java
Swing...

Shalloway and Trott, in their book Design Patterns
Explained, 2nd edition, published what they claim to
be a fix for the broken Double-Checked Locking Pattern.
Would the following truly be a valid means of

I am building a web in which I'd like to be able to upload various
types of files -- PDF, MP3, etc. I would like the added functionality
of being able to upload an entire cd without having to upload all the
tracks. So if I select a directory with 10 songs it will upload all 10

Could some Java guru please help me? I was wondering if there is any
good documentation available anywhere to get me started with JPDA - the
Java Platform Debugging Architecture? I have never used this library
and it would be helpful to know how to get started on it properly.

In my Java application I set a classpath which is exremly long. As I
know there are some limitations on windows regarding the length of a
line. The result is, that I get an IOExpection.
Does anybody know, if it is possible to increase the parameter of the

JDK : 5.0 update 5
OS : MS Windows XP
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public class MainFrame {