Subject:
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Re: interest in JVM porting effort
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 7 May 1999 15:46:35 GMT
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Original-From:
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John A. Tamplin <jat@liveonthenet{StopSpam}.com>
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Viewed:
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1157 times
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On Fri, 7 May 1999, Eric Lind wrote:
> This sounds reasonable. I imagine we'll be using the EmbeddedJava API for
> this, as this allows us to implement only the parts of Java we need or can
> support in the RCX. I'm a bit disappointed with the minimal info that
> java.sun.com provides on what the EmbeddedJava API is. I mean, it says that
> java.awt.applet is unsupported, everything else is configurable, with
> configurable being (by my interpretation) "pick and choose for your platform".
Actually, we can't do EmbeddedJava since that requires a full JVM including
long and double, the Security manager, etc. We aren't going to be able to
call it Java, since it won't pass the compatibility suite (we can say it
implements a subset of the Java Virtual Machine).
As far as the classes, we will certainly need most of java.lang and some of
the other packages, and then of course our own set of packages for
RCX-specific stuff.
> We'll likely need to use LegOS as our base, as actually implementing a native
> Java machine is, sorry to say, beyond most.
Eventually, we will need to either redo the thread scheduler or write our
own.
John A. Tamplin Traveller Information Services
jat@LiveOnTheNet.COM 2104 West Ferry Way
256/705-7007 - FAX 256/705-7100 Huntsville, AL 35801
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: interest in JVM porting effort
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| Aaah, good points. Do we have a preliminary list of packages that we'll need? Actually, it's easier to pick things that aren't needed and then complement it. java.awt is right out, as is java.applet. The same thing can be said for java.beans, (...) (25 years ago, 7-May-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: interest in JVM porting effort
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| This sounds reasonable. I imagine we'll be using the EmbeddedJava API for this, as this allows us to implement only the parts of Java we need or can support in the RCX. I'm a bit disappointed with the minimal info that java.sun.com provides on what (...) (25 years ago, 7-May-99, to lugnet.robotics)
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