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From: Ethan <sam_cit@yahoo.co.in>
Newsgroups: comp.lang.java.programmer
Subject: Re: Avoid derived class to override a method yet should allow callers to invoke the method
Date: Tue, 6 Sep 2011 22:40:22 -0700 (PDT)
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On Sep 6, 9:40=A0pm, Lew <lewbl...@gmail.com> wrote:
> Ethan wrote:
> > =A0 =A0I have a requirement where base class has method (implemented) a=
nd
> > derived class shouldn't be able to override it.
> > However, the method needs to be invoked by a caller who creates an
> > instance of the derived class.
>
> > =A0 Is this possible?
>
> Absolutely.
>
> You prevent an override by 'final' in the method signature, and this is v=
ery frequently The Right Thing To Do. =A0
>
> You make the method callable by client code through 'public' in the metho=
d signature, which is the standard thing to do.
>
> public class BaseOfOperations
> {
> =A0 public final void DoSomething()
> =A0 {
> =A0 =A0 // implementation here
> =A0 }
>
> }
>
> public class SpecificOperations extends BaseOfOperations
> {
> =A0 // cannot override DoSomething()
>
> }
>
> public class Client
> {
> =A0 public void Whatever()
> =A0 {
> =A0 =A0 BaseOfOperations boo =3D new SpecificOperations();
> =A0 =A0 boo.DoSomething();
> =A0 }
>
> }
>
> I suggest that you read the Java tutorials and a good basic book on Java =
programming.http://download.oracle.com/javase/tutorial/
>
> --
> Lew

Thanks Lew and Peter. Its been a while that i have coded in java and
didn't knew much about final.