Use an interface
Create an interface lets call it 'Showable'
for example
public interface Showable {
void doShow();
}
Have A, B and C implement this interface ...
for example:
public class A implements Showable {
...
public void doShow() {
//implementation in here
}
}
That method then would change from:
public void show(Object o) {
o.doShow();
}
to
public void show(Showable s) {
s.doShow();
}
Should work i think
Mark
> -----Original Message-----
> From: A mailing list about Java Server Pages specification and reference
> [mailto:[EMAIL PROTECTED]]On Behalf Of Shawn Zhu
> Sent: Wednesday, November 22, 2000 3:55 PM
> To: [EMAIL PROTECTED]
> Subject: finally, something interesting!
>
>
> Scope: Java
> Q:
> if you have three class A, B, and C all have the same method doShow();
> We only know that all inherit from Class Object (like all other
> classes do).
>
> Is it possible to have a public function that takes in an Class
> Object that
> may belong
> to A, B, or C, and call doShow()?
>
> Something conception like:
>
> public void show(Object o) {
> o.doShow();
> }
>
> Of course the above code won't compile. One way to hack it is to use
> "InstanceOf" (one of the answer) but it's a unclean hack.
>
> Anyone has any better ideas? I thought about going from
> Object.getClass(),
> but it does
> not seem to be the way.
>
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