Subject:
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Re: Why Java for Robots (was NXT and bluetooth enabled phones)
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 17 Jan 2006 21:34:56 GMT
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Original-From:
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Bruce Boyes <bboyes@systronix.comNOSPAM>
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Viewed:
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1965 times
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At 11:11 AM 1/17/2006, steve wrote:
> Laurent Desnogues wrote:
>
> C++ is not a language for inexperienced programmers - it's for
> intelligent, experienced professionals who know what they are
> doing and why they are doing it. C++ programmers have to
> know where to put up self-imposed walls of protection and where
> to sacrifice that protection for performance.
>
> Java (and it's ilk) certainly protect you and force you into
> 'good practices' - but they don't give you a way out when you
> need it. Remember that Java was intended to keep the programmer
> inside a secure sandbox. When you visit a web site and Java is
> enabled on your browser, the theory is that Java is unable to break
> out of the sandbox and destroy your computer - so you can trust
> completely unknown applications not to do nasty things. You couldn't
> trust C++ in that way - which is why Microsoft's "Active-X" is such
> an incredibly stupid idea.
You seem to be confusing "Java" with "Javascript", they are not at
all the same thing. It's unfortunate that Javascript is named to
suggest that it is somehow similar. Javascript in a browser (it can
only execute within a browser) is constrained to a sandbox; Java the
language on your PC as an application (not in a browser), has no such
constraints, see:
http://www.devx.com/projectcool/Article/20066/0/page/2
for a discussion on this topic.
Some refer to Java as a "high-level high level language" and C/C++ as
a "low-level high level language" and there's a lot of truth to that.
Java abstracts things more (example: javaxcomm for serial I/O), but
at least there are standards (example: C/C++ have no such serial I/O
standards at all). But it can be frustrating when you want to peek
under the covers in Java and you can't, at least with any degree of
ease. But the other side of that coin is that programmer productivity
for appropriate applications is much higher in Java than C/C++.
Regards
Bruce
------- WWW.SYSTRONIX.COM ----------
Real embedded Java and much more
+1-801-534-1017 Salt Lake City, USA
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