Controlling a C program from Java

I'm developing a Cross Correlation Spectrum Analyser designed around a PCI ADC card. I've written some C code, which interfaces with the card, captures the data and performs the relevant signal processing. I've also written a Java front end that allows the user to input the parameters for the card, and plots the resultant spectrum.
What's the best way to interface these two? The C program sits in a loop waiting for input parameters. When it has them, it performs the operation, then waits for more input parameters again. Is it possible to interface these with a Process object and using getInputStream() and getOutputStream() methods? Or is there a better way?
Thanks in advance for any advice you can offer.
Bert

if you plan to make a C and a Java app communicate, you should look into Java Native Interface (JNI)

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Oops - meant to say "Controlling Legacy DOS program from Java ..."

Sorry - don't know what I wasn't thinking - muddled up my post title!
As part of my final year project, I'm trying to control a camera mount automatically using stepper motors. This will then be used for robotic navigattion. Most of my code is written in Java, but I have been given some old C code to control the motors with. One loaded, it sits in an infinite loop that waits for keyboard input, resonds, loops, and so on ...
I'm trying desperately to find a way of issuing commands to this program from my Java programs. I tried to implement a listening server in the C code but got a bit bogged down. Now wonder if I can use the
exec and getOutputStream methods in Java to control the Dos program...?
Any ideas very very welcome. I've reached hair pulling out time!
Ben Barker

Everything is now woeking...ish:
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How do I call a C++ program from Java?

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hi,
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I just debugged a little bit through my c program. and it's not the multithrading stuff causing the error, but the win32 socket creation!
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Controlling legacy DOS program from linux

Hi,
As part of my final year project, I'm trying to control a camera mount automatically using stepper motors. This will then be used for robotic navigattion. Most of my code is written in Java, but I have been given some old C code to control the motors with. One loaded, it sits in an infinite loop that waits for keyboard input, resonds, loops, and so on ...
I'm trying desperately to find a way of issuing commands to this program from my Java programs. I tried to implement a listening server in the C code but got a bit bogged down. Now wonder if I can use the
exec and getOutputStream methods in Java to control the Dos program...?
Any ideas very very welcome. I've reached hair pulling out time!
Ben Barker

I can see a couple of ways to do this.
1. Using - as you suggested - exec and input stream/output stream.
I suggest you write a really tiny java control program to test this. You can simply never tell what kind of input or output assumptions are built into the C code. (What I mean is, sometimes it is very hard to find somethng in the output you can use to control your java-sideparsing.
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Controlling a C program from Java

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