How to make a java program run as a background process.

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writing a client server application.
a program is supposed to run on a the client right from the time the client turns on the computer till the computer is turned off.
the catch is the client should all the time be unaware of the program running in his computer, no dos prompt window, no icon on the taskbar,etc. can i convert it the class file into an exe file through software and put the exe filename in autoexec.bat. But then i think that the dosprompt window will open up on starting, but the client should see nothing.
please help
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</pre>
Thanks Daniel and jesper,
could not really fully understand what you mean.
creating a batch file is okay, but do you configure it
to run in a an hidden mode.
Also I have no idea of how to make a window
service.can you please elaborate a bit
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How to make a Java program that recognises a function of two variables...

How to make a Java program that recognises a function of two variables to assign values to that?
First I will give an example and then do the question.
Ex1.
We have any function, eg.y = x ^ 2 + 1 (read 'y' equals 'x' high to the square), a function of the second degree.
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We can use any numbers, but arfer interval [-3.3]
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-2 | Y = 5
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1 | y = 2
2 | y = 5
3 | y = 10
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See this program:
Ex2
* To change this template, choose Tools | Templates
* And open the template in the editor.
Encontrando_o_valor_de_y package;
* @ Author des Soldat Gottes
Import javax.swing.JOptionPane;
Public class (Main
* @ Param args the command line arguments
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Int x, y;
String x1;
X1 = JOptionPane.showInputDialog ( "We have the function y = x + 1 \ n" +
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In: x1 = JOptionPane.showInputDialog ( "We have the function y = x + 1 \ n" +
"Assign a value for 'x',");
The entry is a number and that number is assigned aa ja existing function in the (y = x + 1).
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Ex: the program ask: DIGITE THE FUNCTION?
The USUARIO DIGITARIA A FUNCTION ANY, TYPE: y = x ^ 2 +1
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It would be possible that?
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God bless!

rafaelmenezes wrote:
Thanks for the explanation, could understand what fly said.
But as it applied to a program?
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How to make a java program run as a background process.

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