Moving from Java to C++

[Colonel Kernel]

As Colonel Kernel would say: go read the research papers.

Pretty soon, that's all people will remember when they think of me!

[Love4Boobies]

As Colonel Kernel would say: go read the research papers.

Pretty soon, that's all people will remember when they think of me!

That's something you should start from, reading the research papers, there's quite a lot of research going on in OS area, it's a pity not all OS developers at least skim through these papers.

Oh, gee... good advice I do my share of reading, it's just that it seems I didn't do enough on this particular subject...

[i586coder]

To the best of my knowledge most C++ programmers change there minds to JAVA and
not the contrary, since JAVA is full OOP language ,and on other hand JAVA is adopt
all C++ advantages, and JAVA added some concepts like garbage collections

maybe you want to learn C++ because most OS's codded in this language, but don't
forget there is some OS's coded in JAVA like JavaOS
you can read more
http://en.wikipedia.org/wiki/JavaOS

Cheers
a.T.d

[Solar]

...and when we thought the subject has been sufficiently talked over, here comes the Java advertisment.

<rant>
*deleted because we went just fine without one so far*
</rant>

[Solar]

At least it's not telling you to do things the X way in release 1.2, the Y way in release 1.3, and the X way in release 1.4...

[JackScott]

And then decide at release 1.6 that you would rather call it release 6 instead?

[Love4Boobies]

I thought this was a discussion on languages, not compilers...

[Solar]

We're not talking compilers.

[AJ]

but don't
forget there is some OS's coded in JAVA like JavaOS
you can read more
http://en.wikipedia.org/wiki/JavaOS

As of 2006, Sun considers JavaOS a legacy system.

Cheers,
Adam

[i586coder]

As of 2006, Sun considers JavaOS a legacy system.

YAP!, unfortunately, JAVAos and OS/2 has the same Destiny, but at last you can consider JAVAos as prototype, so you can write OS using JAVA

Cheers,
a.T.d

[AJ]

Hi,

While I don't want to be seen as flaming (I am genuinely interested in bytecode OSes), I have read up on some more background info and came up with this:

The OS itself is 85% written in Java. The drivers are being written in assembler, and some Java Virtual Machine (JVM) and API routines are being written in C++. All of this adds up to one very fast operating system.

If (as stated in a post above) Java has adopted all of C++'s advantages and added extra features, why couldn't more than 85% of the system be written in Java? Also, why have Sun Microsystems given up on JavaOS? You would think that if anyone could make a Java OS work, it would be Sun.

I personally think it's wrong to define an OS by the language it is written in. As I said above, I'm very interested in bytecode / managed / IL OSes, but don't see what advantage it is to a project to say "We're going to code as much of this OS as possible in x/y/z language, regardless of whether that language is the best tool for the job".

Use Java/C#/Whatever for the parts where that language actually confers some advantage over a traditional language. JM2C.

Cheers,
Adam

[i586coder]

Hi,


I completely respect your opinion AJ , but i still believe
PROGRAMING LANGUAGE SOMEHOW the backBone for any OS ,
you know java isn't compiler it's an interpreter,(JAVA generate byteCode), so it's need virtual machine to run that code,and maybe SUN microsystems can't produce hi-quality OS
using JAVA due to that ,

Personally JAVA is the last chance ,i prefer using C/C++ instead.
programming with JAVA, it's tooo slow even with tiny program

The OS itself is 85% written in Java. The drivers are being written in assembler, and some Java Virtual Machine (JVM) and API routines are being written in C++. All of this adds up to one very fast operating system.

you see, even JAVA still need programing language such assembly/C++ in some parts,since there
is no inline assembly in java, java understands one language ---> CLASS

CheerS,
a.T.d

[AndrewAPrice]

I've become extremely fond of D. A powerful modern language that is designed for systems and applications programming. As said on another thread;

No excuses!

What the...

[AJ]

Roll on C++0x (or by the time it's released, will it be C++1x?)

[Solar]

you see, even JAVA still need programing language such assembly/C++ in some parts...

I find it quite amusing, in language arguments like these, that the Sun JVM is written in C++. There's a research project about a Java-written VM, but that hasn't hit mainstream yet (and I am pretty sure that some core components will still be written in, not just "any other compiled language", but C++).