A method can pretty much return anything.
Let say you have a triangle, a circle and a square.
All of them have their own classes.
But lets all say that they inherit from a Shape Interface.
Following me?
You can supply the Interface instead of the object class for the return
type; if you expect all three to be returned but don't know which one will.
You follow that?
- ShapeInterface
- Class = Triangle, Cirlce and Square (all inherit from the ShapeInterface)
- ShapeInterface getSides() = will return the sides of a Triangle,
Circle or Square (or any other objects that inherit the ShapeInterface).
Now which one is returned is based off what called it.
Some times you will see this: getSides(ShapeInterface shape){}
This will return the shape that is passed into it, as long as it
inherits from the ShapeInterface and there is another rule but I forgot.
I need to study up on the basics...
I hope this helps...
Stephen
nn roh wrote:
> Hi all,
>
> I am trying to do the homework , i didnt get this line :
>
> AddressInterface getAddress(); how can a method return an
> interface ? can any one elaborate ..
>
>
> Thanks,
> Nada
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