can I cast a superclass into a subclass?

Hi Keiron,

You can cast a variable of a superclass in to a subclass (down-cast) if the superclass variable actually hold a reference to an instance of a the derived class.

i.e

Given the class definitions:

public class Base{/*members*/}

public class Derived: Base {/*members*/}

The following code snipet is ok:

Base b = new Derived();

Derived d = (Derived)b;

However this snipet will raise an exception:

Base b = new Base();

Derived d = (Derived)b;

 Hope this helps,

 Sam