RE: What CRTJVAPGM does

[Todd Chaffee <tc@xxxxxxxxxxx>]

I don't thinks this is nit-picky, it is a subtle but important point 
(especially for java programmers) and we all should be careful about 
claiming that OS/400 is OO.  IMO, OS/400 provides 1 out of 3 of the 
characteristics of an OO system:

1) Data Encapsulation - OS/400 has it.  The data contained in objects some 
objects as physical files and data queues could be considered an exception 
since you don't need to use OS commands to change the data.  However, the 
object's attributes can still only be modified through the OS.
2) Inheritance - OS/400 doesn't have it.  Too bad - it would make life much 
easier if, for example, you wanted to add a couple of attributes to a user 
profile.
3) Polymorphism - OS/400 doesn't have it.

Todd Chaffee
Lead Consultant
Arkay Computer Consultants, Inc.

At 12:08 PM 09/20/00 -0700, you wrote:
>Not to be nit-picky, but IBM says the AS/400 is an object-based system.
>There are subtle differences... (TAA tools gives one a DLTOBJ, but from the
>OS, there are different commands to handle different objects.)
>
>Having said that, your points are still valid... thanks for the
>explanation...
>
>dan
>Honeywell International
>
>-----Original Message-----
>From: lwloen@us.ibm.com [mailto:lwloen@us.ibm.com]
>Sent: Wednesday, September 20, 2000 10:44 AM
>To: JAVA400-L@midrange.com
>Subject: What CRTJVAPGM does
>
>
>
>Remember that AS/400 is an object-oriented system.
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