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Resources on implementing my own JVM?

Posted on 2002-06-12
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Hi

I want to implement my own JVM on a limited memory hardware device. The JVM will probably be more compact than that which is used in J2ME. Does anyone know of any great resources I could use for doing this? I'm kind of looking for a "how to write a JVM" book, web site and so forth.

Thanks

Matth
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Question by:matth012098
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CEHJ earned 100 total points
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You'll certainly need 'The Java Virtual Machine Specification' of Sun http://www.amazon.co.uk/exec/obidos/ASIN/0201432943/proteanit-20 and a good book on the VM is Bill Venners' 'Inside the Java Virtual Machine' http://www.amazon.co.uk/exec/obidos/ASIN/0071350934/proteanit-20
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by:girionis
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 The Java Virtual Machine specification is the first place to start: http://java.sun.com/docs/books/vmspec/

  Hope it helps.
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by:girionis
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 Sorry for the double URL... CEHJ ws faster :-)
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by:Jim Cakalic
Jim Cakalic earned 100 total points
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Sometimes complete working examples help; and there are several open-source JVMs available as references:
    http://kissme.sourceforge.net/
    http://www.mozilla.org/projects/ef/
    http://www.japhar.org/
    http://www.sablevm.org/

AFAIK, all of these are open source or licensed under a variant of the GPL or BSD licenses. Each is a working project that includes implementation of both a bytecode interpreter as well as core class libraries. Both of these are essential for a working VM.

An excellent reference for understanding JVM workings is the book "Inside the Java Virtual Machine" by Bill Venners. He also maintains a complementary website. In addition to excerpts from the book, there is a variety of resources that include interactive simulations that demonstrate JVM concepts, a number of articles originally published for the "Under the Hood" column at JavaWorld, and links to other resources that might be of use.

Best regards,
Jim Cakalic
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No comment has been added lately, so it's time to clean up this TA.
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by:Jim Cakalic
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OK by me.
Jim
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