A few days ago Java installed on my machine, an update "jre1.5.0_09". I then
deleted what I thought was an earlier version - "jdk1.5.0_06". Now my Java
programs work OK but I can not compile - it says "javac is not recognized as
an internal or external command, operable program or ...

I'm using eclipse on Linux.  I'm using a 3rd party Java class in my
application.
My application runs fine until I invoke code that uses the 3rd party
application.  When I do that, I get the following:

Can anyone suggest how we can interface Outlook Express with java in
order to send email?
I want to add 'Email Friend' link in my project, on clicking on this
link Outlook Express should open with a specified file attached.

I've got an odd request for a Java app.
Someone wants a scrolling banner for their desktop.  They want to leave
their wallpaper in place, but they want a Java app that periodically
scrolls certain text across their desktop.

I am traying to draw an image in a JPanel and I really don't know how,
I already searched in google but none of the answers worked ok,
where I have the problem is getting the image if I do this:
g.drawImage(img, x, y,(I don't understand what goes here)

What does work:
For years my application ran by using my own MVC framework.  I have a
couple of hundred different model objects each with their own couple of
views.

considering reuse at the source code level, what are the
characteristics that discriminates a model from a view or controller.
in other words, if some one gave me a peice of source code, is it
possible to tell whether it is a model or a view or a controller just

I maintain a server running JServ, with many servlets created by other
developers.  Once in a while one of the servlets gets stuck in an
infinite loop, and I'd like to know which servlet (or servlets) are
causing this.

Just a quick question; I'm learning Java at the moment (slowly), I am
looking to perform serial comms eventually, such as RS-232 via the serial
port and maybe even CAN (will require additional hardware though).  Does
anyone know how easy either of these are to implement in Java?

I 'm trying to output the result from a class called lexical, and CLASS
lexical uses  PrintWriter as an output stream.
I successfully output the result to the file using the following
command

I have a strange problem. I started work on software expecting that it
was possible to create many client sockets in a single instance of a
java program that connect to a single server where ever that maybe.
In this case I have a thread running that determines actions, and

Our application, at one stage of its processing, does some intensive
computation - in fact typically about 2000 such computations each of
which is entirely independent of the next. This seemed an ideal
candidate for multi-threading and running on a multi-cpu machine.

From the available documents from java.sun.com, I can not find rich
information about this option, which is used to tune memory of JVM. Are there
any samples/documents of this option, like the meaning/function/best
practices of this option. Thanks.

I am try to create a dynamic table.
String[] dataColumns = {"Observation Time", "Value", "Mode"};
DefaultTableModel dataTableModel =
          new DefaultTableModel(dataColumns, 100);

I am try to edit my table three columns:
Observation Time, Value and Mode where they are
Timestamp, Double and String.
My first question is do I need to create three