[Advanced-java] OOP's Question

[uddipan.bagchi at wipro.com]

...Because that is the basic idea of method overriding. The method is actually invoked by a class of type A, and so it hunts for the method implementation first in Class A, then B, then C.

You need to do a lot of exercises like these to understand OOPs better...that's the only way to learn and know its exact behaviour. I've done it as well, a long time back though. 


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-----Original Message-----
From: advanced-java-bounces at lists.XCF.Berkeley.EDU <advanced-java-bounces at lists.XCF.Berkeley.EDU>
To: jaz at zukowski.net <jaz at zukowski.net>; advanced-java at lists.xcf.berkeley.edu <advanced-java at lists.xcf.berkeley.edu>
Sent: Fri Apr 27 15:27:17 2007
Subject: Re: [Advanced-java] OOP's Question

When I execute the program in Eclipse in debugging mode, I could see that the methodA() in A was being execute. But I could not follow exactly, that's why post the question.

> Date: Fri, 27 Apr 2007 10:14:01 -0400
> From: jaz at zukowski.net
> To: advanced-java at lists.XCF.Berkeley.EDU
> Subject: Re: [Advanced-java] OOP's Question
> 
> 
> This is easy to answer. It is called println. Add one to each of the 
> methods and see which one is called.
> 
> As far as Why.... Isn't that what homework is for, so you learn something?
> 
> J
> 
> Quoting "G.N.V. Jayprakash" <gnvjp at hotmail.com>:
> 
> >
> > Hi,
> > I have a question in Object Oriented Programming:
> >
> > A extends B. B extends C. There is a public method methodA() 
> > implemented in C. methodA() is also overridden in A.
> >
> > There is a flow starting from A from preProcessRequest() 
> > implemented in A. preProcessRequest() is also implemented in B.
> >
> > Now preProcessRequest() in A invokes super.preProcessRequest(). The 
> > control goes to the preProcessRequest() in B.
> > preProcessRequest() method implementation in B invokes methodA().
> >
> > Now the question is: Will the methodA() implemented in C will be 
> > invoked or the methodA() implemented in A will be invoked? Why?.
> >
> 
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> Advanced-java at lists.XCF.Berkeley.EDU
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