I am developping a client server application and I am stuck in a kill
thread/process problem; in my client I start a calculation process
(trough a button), wich will launch a process to do this task; after
the process finishes all computations, the results are displayed into

I tried to find out what is difference between java.*.*... packages and
javax.*... packages
Is it only a naming convention randomly followed (least possible) or it
has some meaning?

I want to retrieve a key from a map, and I don't find a way to do this.
For instance there is the following code:
HashMap m = new HashMap();
String key = new String("k");

when we download any data file, the data from different columns get
downloaded with a comma as a delimiter.
how to download a file with a record as a continuous stream of data.
i don't want to remove the commas after downloading.

I don't think this is possible, but I figure it won't hurt to ask.  I just
might learn something new.
I have an object I've created with a boolean isActive.  I can set it my
setting the field directly (myObject.isActive = true) or with a setter

Recently I wrote a certification test for Java2. There was a question
on using wildcards in import statement with four options. Only one
among them is correct (as per the test paper).
I was not very sure about the answer.

Is there a way to have Eclipse watch for modified files that were
modified outside Eclipse?
For example, a file is modified by another editor than Eclipse.  When
the modfication happens I want Eclipse to update its cache, compile,

I'm writing an application to play a large WAV file (say a couple
hundred of megs), and allow the user to jump to / select a position in
the file (e.g. 120 seconds into it) to start playback.  The "skip"
method of AudioInputStream always seems to return the value "4096",

Can someone tell me how do i find a particular string in the text file.
Suppose i have a text file and i want to check if a word say 'computer'
is present or not in the file ,so how do i go about it?

We run an application using RMI.
We run the RMI registry on server side on port 4000.
When a client gets a connection to the server, it appears that RMI also
tries to open a connection from server to client on a random port on

New to Java, new to Eclipse.
I am trying to get Eclipse up to speed with the Webtools plugin.  I
have added the webtools site to the updates list and can connect, but
when I try to actually run the install, I get this error:

I am looking for some statistics regarding the usage of Java platform.
I am especially interested in amount of developers involved in java
server-side (enterprise) development vs. amount of developers
programming standalone java applications. Have anybody seen the info in

I'm extremely confused about the differences between J2SE and
J2EE. I definitely get the idea that J2EE is meant of developing
multitier robust applications, web services, and other such fancy
enterprise level software. What I don't understand is why this

Why does the following code cause a warning and how to avoid it w/o
turning warnings off?
Vector<File> a = (Vector<File>) (Object) new Vector<File>();
The warning is:

I have a protocol structure that makes use of subcommands and I was
wondering if it's possible to do something like the following:
public enum MajorCommand {
   LOGON { public enum SubCommand { }; }