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AP Computer Science A
Unit 9 – Inheritance in Object-Oriented Programming
Topic 9.6
In Java, can a subclass object be assigned to a superclass reference variable?
No, it is not allowed, and attempting to do so will result in a compilation error.
No, it is not allowed, and attempting to do so will result in a run-time error.
Yes, it is allowed and does not require any casting.
Yes, but it requires explicit casting to avoid compilation errors.
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AP Computer Science A - 9.6 Polymorphism
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Java
Subclass
Superclass
Reference Variable
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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.
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