I have a question. In language like C, to understand the exact error
occurred in a program, we make a comparison between the code returned
by a function and a constant defined in the same library.
In java we have exceptions, which are too generic and are associated

Hi,all:
I am writing a web application to show mails received by JavaMail.
And I found that some content-type of the mail headers is:multipart/
related,which means there are some embeded images,vidios,etc.And I

I'm looking for a way to retrieve the day, hour and sec between two
dates object
I know how to retrieve the number of days :
        long daterange = dateEnd.getTime() - dateBegin.getTime();

Hi, everybody.
Recently, I'm trying to build a swing app on netbeans platform.
However, I'm not good at netbeans platform though I have a 7-year
experience of swing development.

Hi friends, i'm need your help.
The file Tools.jar exists in Linux?
How i find this file? Exists anybody way of i know the classpath  the
machine?

I have a design that has a collection of serializable objects which
contain several static final variables. I am wondering what will
happen with these if I were to output the collection to a file. I am
just learning Java but have several years of embedded experience with

Hello all and thanks to all that try to help me.
Here is my case. I am working on Project for a Java programming class.
I have created some JDBC applications that query a MySQL database and
they work perfectly when i run them through appletviewer as JApplets,

I am requested to create a jsp page to present an article. (myArt.jsp)
It says that given the ID this myArt.jsp?id=AID should be a valid XML
file.
My question is how can the JSP file when getting the ID become a valid

hi...
why after a few hot deploys i get OutOfMemory Exception (i've allready
increased xmx and xms)

I am new to java encryption and would appreciate some guidance.
Consider the following piece of a java program:
      KeyGenerator kgen = KeyGenerator.getInstance("AES");
      kgen.init(128);

Sirs/Madam
I encounter the problem on date field.
Sometimes, when there is no date, then it will return the null object. When
I want to check by

I was wondering if there is a way to call a specific constructor when
creating an array in Java. I have an object whose constructor takes in
some parameters, and I want to set up an array of that Object with a
set of Parameters.

We need to develop a SOAP service on appache. Java axis 2 with Resin
seems like what we should do, however  I was wondering if doing this
in Perl might be a good idea ? I did see that the WSDL generator on
CPAN says it does not work in Perl 5.8 because of autoload problem in

I have a graph of Leafs and Nodes.
A Node has 0...n Leafs
A Leaf has 1...2 Nodes.
The referencing is circular.

Why/How does this work?
I know that if I want to convert a signed byte (ie > 0x7F) to unsigned
number I can promote it to an integer, like this:
byte a = (byte)0xAB; // -85