Calling base class methods with interface reference variable

Question

I have a base class and an interface. Now I am creating a subclass from these. If I create a reference variable of the interface type to point to an object of the child class, can I access the base class methods using it?

Class BaseClass
{
public void baseClassMethod()
{
.....
}
}  
Interface MyInterface
{
public void Interfacemethod();
}


Class ChildClass:BaseClass, MyInterface
{
....

}


....


main()
{
MyInterface myclass= new ChildClass ();
myclass.baseClassMethod();//Is this possible? y?
 }

Why don't you try this?

Gorgsenegger
– Gorgsenegger

2013-05-20 06:42:54 +00:00
Commented May 20, 2013 at 6:42 — Gorgsenegger
– Gorgsenegger, Commented May 20, 2013 at 6:42

Marc Gravell · Accepted Answer · 2013-05-20 06:45:04Z

6

The variable myclass is statically typed as MyInterface, which does not have a method called baseClassMethod() - so no, that won't work. You would need to cast the reference back to BaseClasss or Child (either would be fine), or add the method to MyInterface (or some additional interface).

answered May 20, 2013 at 6:45

Marc Gravell

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