Problem of the Day

Monday, March 9, 2026

Problem:

Consider the following definitions for classes A and B, where class B inherits from A.

public class A
{
    private int x;

    public A()
    {
        x = 1;
    }

    public int getValue()
    {
        return x;
    }
}


public class B extends A
{
    private int x;

    public B()
    {
        x = 2;
    }
}

What is the output produced from running the following test program?

public class ABTester
{
    public static void main(String[] args)
    {
        A aObject = new A();
        B bObject = new B();
        A cObject = new B();
        System.out.println(aObject.getValue() + "," + 
                           bObject.getValue() + "," + 
                           cObject.getValue());       
    }
}

1. 1 1 1
2. 1 2 2
3. 1 2 1
4. 1 1 2

(Note: This question includes topics that are not currently part of the AP Computer Science A core curriculum.)

Show solution: