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AP Computer Science A
Unit 9 – Inheritance in Object-Oriented Programming
Topic 9.5
If the class Car is a subclass of the class Vehicle, what happens when Java tries to run the line “Vehicle vehicle = new Car();”?
There will be a compile-time error.
The reference variable `vehicle` will point to null.
The Car object will be successfully assigned to the reference variable `vehicle` of type Vehicle.
There will be a runtime error.
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AP Computer Science A - 9.5 Creating References Using Inheritance Hierarchies
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Car
Vehicle
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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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