RE: Java and CPU

[Kelly Cookson <kc62301@xxxxxxxxx>]

I'm still new at this, but my understanding is that
optimization on the AS/400 involves translating
bytecode files into *FILE objects that contain native
machine instructions.  The bytecode files do not have
to be overwritten, so you can always take your
bytecode files to another machine.

The downside to optimization that I've read about (but
not yet experienced because I'm so new at it) are
longer compilation times and, at higher levels of
optimization, difficulty in debugging.

Kelly


--- "Stone, Brad V (TC)" <bvstone@taylorcorp.com>
wrote:
> This is "news" to me as well.  I assumed that while
> Java isn't 100%
> interpreted it is still a little interpreted, ie not
> a fully compiled binary
> object, etc.
> 
> The reason I still thought this was because I've
> seem complaints against
> java (mostly from C programmers) because it's very
> easy to take the class
> and decompile to get the source.  I've looked at
> class objects and they are
> almost human readable.
> 
> What type of compiler is javac considered?  What
> does JIT or direct
> execution comipilation do to the portability of
> classes?
> 
> Brad


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