[GR-Jug] inheritance ?

[Derek Vredevoogd]

Is this an invitation?

Derek.

-----Original Message-----
From: Carlus Henry [mailto:chenry at gfs.com]
Sent: Monday, February 02, 2004 3:33 PM
To: jug at gr-jug.org
Subject: Re: [GR-Jug] inheritance ?


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Are we still planning on meeting tomorrow at Perkins on Alpine?  What time?

Carlus

>>> matt at eisgr.com 02/02/04 02:53PM >>>
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Derek Vredevoogd wrote:

>You are a member of the Grand Rapids Java Users Group mailing list.  
>Please see the bottom of this message for information on
unsubscription/customizing your preferences.
>Hey thanks.
>I don't know if I quite understand you're logic here.
>But, I do have an idea what you are saying.
>I can ask again at the next meeting.
>
>I was dealing a bit with polymorphism.  
>I was hoping to put a private method in my 
>subclass and have it still be available in 
>its parent class(without declaring it in the parent) after conversion.  But

>somehow I don't think that will work.
>But, then I got real confused and this 
>question came to mind.
>Anyways, no worries. Not a big deal right now.
>
>------
>
>OK, here is a stumper, at least for me.
>
>Do the modifiers assigned to features in a parent class 
>dictate what features will be inherited by its children?
>If so, what are the rules, and where is a good document about it?
>
>Modifiers:
>public,default,protected,default
>final,abstract,static,native,transient,
>synchronized,volatile
>
>features:
>class, method, or variable
>
>  
>
There is not way to inherit up the inheritance tree.  Inheritance only 
flows "down" from parent to child.  If you are a hack, you can cast the 
parent object as its child in order to take advantage of the child's 
methods, but why not just implement the method in the parent as a 
"protected"?  If it doesn't work for all children, reimplement over it, 
or re-subclass (adopt) it under a different parent.

Make sense?  To reiterate Carlus's question, what exactly are you trying 
to do?  Why would it make sense to NOT implement in the parent and yet 
use it there?

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