java and c

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focode - 21 Apr 2007 12:16 GMT

i have developed a program in turbo c3 which communicates with
parallel port of my pc , through which i am able to control the
working of some electrical appliances , i want to communicate with
that program from my java program , how can this be made possible ?
If any one can help me , plz

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hellovinu@gmail.com - 21 Apr 2007 16:01 GMT

> i have developed a program in turbo c3 which communicates with
> parallel port of my pc , through which i am able to control the
> working of some electrical appliances , i want to communicate with
> that program from my java program , how can this be made possible ?
> If any one can help me , plz

in java you can us ethe package javax.comm ,but you have to download
it from sun.com

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Philipp Leitner - 21 Apr 2007 18:56 GMT

> i want to communicate with
> that program from my java program , how can this be made possible ?
> If any one can help me , plz

You can use JNI (Java Native Interface) to communicate with C(++)
applications. Look at java.sun.com, there's a good JNI tutorial
available.

/philipp

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Oliver Wong - 26 Apr 2007 15:50 GMT

>i have developed a program in turbo c3 which communicates with
> parallel port of my pc , through which i am able to control the
> working of some electrical appliances , i want to communicate with
> that program from my java program , how can this be made possible ?
> If any one can help me , plz

It depends on the interface that your C program exposes. If your C
program can communicate via stdio, you could have your Java program talk
to it that way. If your C program monitors a specific directory for files,
your Java program may be able to communicate by producing the appropriate
files. If your C program listens on a socket, your Java program can
communicate with it via sockets.

- Oliver

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Martin Gregorie - 26 Apr 2007 21:32 GMT

>> i have developed a program in turbo c3 which communicates with
>> parallel port of my pc , through which i am able to control the
[quoted text clipped - 8 lines]
> files. If your C program listens on a socket, your Java program can
> communicate with it via sockets.

The OP mentions Turbo C 3, so presumably that's Borland C. Borland C
4.5 didn't include either sockets or poll() in the standard C library. I
speak ANSI C, not C++ so can't tell whether the C++ classes might
support sockets: however as "sockets" doesn't appear in any
documentation indexes my guess is that it doesn't, so version 3 won't
either.

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martin@ | Martin Gregorie
gregorie. | Essex, UK
org |

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java and c

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