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Self Modifying Code

How do you write self modifying code in Java?

Japcuh
(Just Another Perl C Unix Hacker)
http://www.catb.org/~esr/faq/hacker-howto.htm#what_is
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Jul 17 '05
16 8151
Check out this package:

http://jakarta.apache.org/bcel/
"Japcuh" <ja****@gmail.c om> wrote in message
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How do you write self modifying code in Java?

Japcuh
(Just Another Perl C Unix Hacker)
http://www.catb.org/~esr/faq/hacker-howto.htm#what_is
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Jul 17 '05 #11
ja****@gmail.co m (Japcuh) wrote in message news:<3a******* *************** ****@posting.go ogle.com>...
How do you write self modifying code in Java?

Japcuh
(Just Another Perl C Unix Hacker)
http://www.catb.org/~esr/faq/hacker-howto.htm#what_is
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It's nowhere near as easy as it is in Perl.

If you look at JDBC you'll see that there's a call to Class.forName()
to load the driver class. That may be of use to you. It's sort of an
'import' on the fly.
Jul 17 '05 #12

"Japcuh" <ja****@gmail.c om> wrote in message
news:3a******** *************** ***@posting.goo gle.com...
How do you write self modifying code in Java?

Japcuh
(Just Another Perl C Unix Hacker)
http://www.catb.org/~esr/faq/hacker-howto.htm#what_is
.0.
..0
000


Look up "Javassist" on google. Its what JBoss 4.0 uses to do dynamic aspect
weaving and dynamic remote proxy generation among other things. By the way,
for those who have used cglib, can you point toward some good online docs?
I have been unable to find any I found adequate. Javassist has pretty good
docs however.

l8r, Mike N. Christoff

Jul 17 '05 #13
ja****@gmail.co m wrote...
How do you write self modifying code in Java?


If it's truly self-modifying, good luck debugging it.
Jul 17 '05 #14
Entropy <en*****@domain .invalid> scribbled on the stall wall:
ja****@gmail.co m wrote...
How do you write self modifying code in Java?


If it's truly self-modifying, good luck debugging it.


the simple answer is "you can't"...self modifying code hasn't really been
feasible since the fortran 4 days...or maybe in C but that is still
platform dependent.

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Jul 17 '05 #15
no***@uber.usac hoice.net wrote...
Entropy <en*****@domain .invalid> scribbled on the stall wall:
ja****@gmail.co m wrote...
How do you write self modifying code in Java?


If it's truly self-modifying, good luck debugging it.


the simple answer is "you can't"...self modifying code hasn't really been
feasible since the fortran 4 days...or maybe in C but that is still
platform dependent.


I recall the capacity of LISP-like functional languages (ie, Scheme)
to dynamically generate new functions and apply them.

It was a long time ago when I sat in that class, however, and I've
never used such a language outside of the classroom.
Jul 17 '05 #16


Wiseguy wrote:
Entropy <en*****@domain .invalid> scribbled on the stall wall:
ja****@gmail. com wrote...
How do you write self modifying code in Java?


If it's truly self-modifying, good luck debugging it.

the simple answer is "you can't"...self modifying code hasn't really been
feasible since the fortran 4 days...or maybe in C but that is still
platform dependent.


Java "modifies itself" every time it loads a new class
definition. An important point is that the decision to load
a class is made at run time, not at a "link time."

A Java program can even generate an array of bytecodes
at run time, turn them into a class, and create objects of
that class; see defineClass() in java.lang.Class Loader.

--
Er*********@sun .com

Jul 17 '05 #17

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