Creating Superclasses and Subclasses

AP Computer Science A· difficulty 3/5

public class Parent {
    private int secret = 99;
    public int getSecret() { return secret; }
}
public class Child extends Parent {
    public int doubleSecret() {
        // attempt to access secret directly:
        return secret * 2;
    }
}

What is the result of compiling Child?

A
$Compile error: secret has private access in Parent$
check_circle
B
$Compiles fine; doubleSecret returns 198$
C
$Compiles fine; doubleSecret returns 0$
D
$Runtime error when called$

Explanation

Private fields are not accessible in subclasses. Child must use the public accessor getSecret() rather than direct access.

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