RE: framework question -- JAVA400-L

>In what world is this a good idea?

Basically what I am looking for is exactly what you have provided me.  I
need a list of places where each language will fall short or exceed, and
before now I was only getting "Java should not be used for business logic".
But now I can go back and research your specific concerns and see if I will
have the same issues.  Have you worked with the Java Toolbox's BigDecimal
classes and the like (concerning your fractions of a penny problems)?  I
figured if IBM produced those classes with the iSeries in mind that they
would make sure they facilitated all its needs.  I am assuming you have
because I think I saw that you are affiliated with JTOpen.

>I've written more RPG than a good percentage of RPG programmers...
I guess I took you for a Java guy until just recently (past year or so).
What is your history with RPG?

Aaron Bartell

-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx [mailto:java400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Joe Pluta
Sent: Wednesday, June 30, 2004 2:46 PM
To: 'Java Programming on and around the iSeries / AS400'
Subject: RE: framework question

> From: Bartell, Aaron L. (TC)
> 
> I want to pick on the "...and flexibly..." in that sentence.  I have 
> wondered for some time why Java couldn't be used for business logic if
you
> used it in the same capacity as RPG ILE would allow you.  Basically
you
> could translate that sentence to say "Couldn't you just write
procedural
> modular Java?".  People too often assume that when you go Java that
you
> have
> to develop everything to a purists OO standards, and that just isn't
the
> case (as I know from coding my first years worth of Java :-)

Nigel and Marc are talking about OO Java, with special focus on inheritance.
It is my firm conviction that in most cases inheritance is the wrong tool to
use when building business objects.

You're running off in another direction.  Sure, you could use procedural
Java.  But WHY?!?!?!  "Procedural modular Java" is equivalent to
"interpreted RPG that doesn't have native support for decimal arithmetic".
In what world is this a good idea?


> My view on Java would be that you should use it where it works good
for
> you;
> and the only way you are going to find that out is by trying it in 
> different scenarios.

Which I have, probably more than most people.  I've written more RPG than a
good percentage of RPG programmers and more Java than a lot of Java
programmers, and I may have written more of both combined than just about
anyone.  So I think that probably gives me a right to an opinion.


> I don't see why Java couldn't be good at business logic, but in the 
> same breath, I have only developed a handful of JavaBeans that do
so.
> Most of my Java work is communications layer stuff because Java was
the
> obvious answer in that arena.

Try it.  You won't like it.

Especially try doing some hard calculations.  For example, try to write some
good old WIP materials costing, making sure not to lose any fractions of
pennies along the way.  Or triangular currency conversions.
You'll go blind.

Joe

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