Java Reference Assigned

Question

class ClassA {}

class ClassB extends ClassA {}

class ClassC extends ClassA {}

and

ClassA p0 = new ClassA();
ClassB p1 = new ClassB();
ClassC p2 = new ClassC();
ClassA p3 = new ClassB();
ClassA p4 = new ClassC();

 p0 = p1 works
 But, p1 = p2 fails compilation....

Could not figure out why is this behavior when the hierarchy is same in both the statements? A --> B --> C

Maybe ClassC should extend ClassB for your hierarchy to be accurate? — Joachim Isaksson, Aug 09 '13 at 07:32

score 1 · Answer 1 · answered Aug 09 '13 at 07:35

1

In your hierarchy A->B->C is not true. It is A->B, A->C. And C is not a subtype of B.

answered Aug 09 '13 at 07:35

dbf

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Java Reference Assigned

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