I am trying use org.apache.commons.net in my netbeans project.  when I tried
to add org.apache.commons.net version 1.4.1, nothing show up in the libray
and my imports for org.apache.commons.net.... etc are still flagged as
invalid.

    I'm trying to run a large Java project that I didn't write.  When
I do, I get the following:
java.lang.NoClassDefFoundError: and
Exception in thread "main"

I am totally new to world of blogs and internet. However, being new
does not mean I not love it and amaze at it including the community in
it.I wish to know more,and has a grasp somehow of basics.I thank all
of you should I sounds totally really new amongst the already way

I am using JDBC to compare the content of two database tables -- writing a
general function and two tables are input. The two tables have various types
of columns, like VARCHAR, BLOB, INT, FLOAT, etc.
I want to save my time to write various statements to get values by different

I would like to know if there's something similar to strcuture in C in Java.
Something like
Structure Persone
{

A website I use has a chat room and it's chatter-side interface is a Java
application.  The comments chatters post come thick and fast and, although
there is a scoll bar, it's no good scrolling down to see comments missed,
as, as soon as a new comment is posted, all the comments ...

I am creating a form using swing through coding (not using netbeans).
Now in the form I have one JComboBox
of Country and other of State.  Now I want it in such a way that when
I select a country from the Country JComboBox ,the corresponding

I'm trying to write a program to compare two text files and write the
results to a third file. If the compared text files are different the
results file contains the line number where the difference was found and the
corresponding lines from each of the files being compared.

1. I am wondering for quite some time now:
When passing nulls to my methods and constructors (for required
fields), is it better to use IllegalArgumentException("Blah is null!")
or NullPointerException("Blah is null!")?

guys! after just reading your messages i just felt that you have vast
knowledge of computer. i am just an beginner. I HAVE AN QUESTION!
can any one tell me that WHAT ARE THE SIMILARITIES AND DIFFERENCES
BETWEEN MODELS OF SOFTWARE ENGG. SUCH AS SPIRAL MODEL, WATERFALL

Someone can say the major differences between them ? (Mysql is not free ?)
Many thanks

I want to use jarsigner but it seems to be missing from:
C:\Program Files\Java\jre1.6.0_02\bin
any ideas ? is their a different tool in this version of java? keytool
is still there

I'm trying to get an Java applet to work online. I've written the code
within Netbeans and it compiles and works fine there.
When I try and put it within a website I get the following error:
java.lang.NoClassDefFoundError: org/jdesktop/layout/GroupLayout$Group

I have an external file called "log4j.properties" that is being utilized. I
know this since the log file is being created. However, the logging level
(log4j.LogLevel) is being ignored. Please help me find where I am going
wrong.

When are writing a program where there are lots of methods and they
have a lot of interaction.
1. At the top of each method, write in clear language just what that
method does AND WHAT IT DOES NOT DO that you might plausibly expect it