subclass has a variable that is subclass of same superclass

[jstorta]

I have been running this scenario in my head for a while. In the
surface it seems fine, but I keep thinking that somehow it will cause
problems.


class A {
}

class B extends A {
}

class C extends A {
B myB;
}

Class B is a A

Class C is also a A but also has a B which is in turn a A.


Is there anything wrong with having a variable in a class of a type
that inherits from the same parent that the class itself inherits from?


Thanks.

 

[Mike Schilling]

I have been running this scenario in my head for a while. In the
surface it seems fine, but I keep thinking that somehow it will cause
problems.


class A {
}

class B extends A {
}

class C extends A {
B myB;
}

Class B is a A

Class C is also a A but also has a B which is in turn a A.


Is there anything wrong with having a variable in a class of a type
that inherits from the same parent that the class itself inherits from?

Not at all. Consider that A might be "java.lang.Object".

 

[Jeffrey Schwab]

Not at all. Consider that A might be "java.lang.Object".

Nicely put!

 

[jstorta]

It makes perfect sense when you put it that way.

Thanks.