🚀 go-pugleaf

you can use instanceof with both classes and interfaces to check if the
object is an instance of the class or an implementation of the interface

"David Crocker" <dcrocker@imsltd.com> wrote in message
news:3ae038b6$1_2@dnews...
> I have a requirement to distinguish at run-time whether a variable X is
> exactly of some type T as opposed to being of some type derived from T. I
> have to assume that T might be extended by an ignorant third party, so
> defining a virtual function in T and then overridding it in all
descendents
> of T is not an option.
>
> What is the best way of doing this? I know I can use getClass() to get the
> Class object of the run-time type of X, but is there an efficient way to
get
> the Class object that corresponds to T? So far the best I can come up with
> is to declare within class T the following:
>
>    static const Class myClass = Class.forName("T");
>
> then I can express the test as "X.getClass() == T.myClass".
>
> Is there a better way? Does Java provide any other way of obtaining the
> Class object for a given type? Any other ideas or advice will be
> appreciated.
>
> Dave Crocker, Escher Technologies Ltd.
>
>