Writing Constructors for Subclasses

AP Computer Science A· difficulty 3/5

public class A {
    public A() { System.out.print("A "); }
}
public class B extends A {
    public B() { System.out.print("B "); }
}
public class C extends B {
    public C() { System.out.print("C "); }
}
// Usage:
C c = new C();

What is printed?

A
$C$
B
$A B C$
check_circle
C
$C B A$
D
$A C$

Explanation

Constructors run from the top of the hierarchy down. Implicit super() calls fire first: A runs, then B, then C.

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