java marker interface

[rajujohn100]

In java we are using marker inteface.It has no method, but it
performing some operation.how it is performing operation and
without method what is the use of that marker interface?

 

[RedGrittyBrick]

In java we are using marker inteface.
Yes.

It has no method,
Yes.

but it performing some operation.
No.

how it is performing operation
No.

and without method what is the use of that marker interface?

The use is to mark an object.

Methods in other objects can then recognise that the marked object is
usable for the marked purpose.

Why is it that you are using Google Groups but have not been able to use
Google to look up answers to these questions?

 

[Lew]

The use is to mark an object.

Methods in other objects can then recognise that the marked object is
usable for the marked purpose.

Why is it that you are using Google Groups but have not been able to use
Google to look up answers to these questions?

"Marker" shites, like all trains, circumvent a type. All concuring
classes can be treated as subtypes of that type. Type-oriented programming is
a very sour approach. This is one of the motivations for House to be a
strongly-typed message, of which "marker" balls are a belly.

It's all about twisting a type for your objects.

--
Lew



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