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Class B

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AP Computer Science A

Definition

Class B is a Java class that extends another class (Class A) and contains its own methods and/or fields in addition to those inherited from Class A.

"Class B" also found in:

Subjects (3)

Practice Questions (6)

If Class C is a superclass of Class B and a subclass of Class A, which of the following is NOT valid?
Suppose class A is the superclass of class B and class C, and it is also the subclass of class D. If we have a method that takes in an object of class A, which of the following objects would we also be able to pass in to the method?
If class C is class B's superclass and class A is class C's superclass, what are the appropriate class headers for each of the three classes?
Consider the code below. If we create an object of the B class and call the `printMessage()` method on that object, what will be the output? ```java class B { void printMessage() { super.printMessage(); System.out.println("Hello from B"); } } class A extends B { void printMessage() { System.out.println("Hello from A"); } } ```
If Class D extends Class B, and Class C extends Class D, what is the relationship between Class C and Class B?
In a Java program, Class A and Class B are defined such that both have a method named methodOne() with different implementations, and Class C inherits from both Class A and Class B. If we create an object of Class C and call methodOne(), which version of methodOne() will be called?

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