Subject:
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Re: RCX and Java
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 5 May 1999 15:18:46 GMT
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Original-From:
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Ola Liljedahl <olli@enea*stopspammers*.se>
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Viewed:
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1234 times
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"Søren Hilmer" wrote:
>
> In lugnet.robotics, lego-robotics@crynwr.com (Ola Liljedahl) writes:
>
> > We should make the distinction between real time systems and embedded
> > systems. Java is fine for embedded systems with no real time requirements.
> >
> > In my line of business I see some Java being used in real time systems.
> > But never for real time purposes, only for low priority (as regards to
> > real time properties) operation and maintenance.
>
> FYI I have been involved in two (big) projects using java for controlling
> industrial production one is used to control high speed sorting systems the
> other for controlling packing of newspapers comming directly from the rotation
> press. And yes it works. Offcourse you cannot give any guarantess.
When making a GSM call setup the latency for the call going into a base
station/base station controller and out into the next in the chain is 20ms.
If you fail you break the GSM specification. How are you going to guarantee
that with Java?
Don't you want the telephone network to function reliably?
Why did you pick Java for this problem? Just because of the hype?
--
Ola Liljedahl
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 2 Replies:
 | | Re: RCX and Java
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| (...) I don't think anyone is suggesting that Java is appropriate for a hard-realtime system. Personally, I would expect nothing less than an RTOS with a deadline-based scheduler and a low-level language. However, I think the RCX does not have any (...) (25 years ago, 5-May-99, to lugnet.robotics)
| | | Re: RCX and Java
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| (...) rotation (...) No, java was picked because the company did not wan't to use C++ as it had some bad experience with projects taking way too long to complete. It had used Visual basic (yieek) before but it tended to be slow and the code was not (...) (25 years ago, 10-May-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: RCX and Java
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| (...) FYI I have been involved in two (big) projects using java for controlling industrial production one is used to control high speed sorting systems the other for controlling packing of newspapers comming directly from the rotation press. And yes (...) (25 years ago, 5-May-99, to lugnet.robotics)
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