Polymorphism and Method Overriding

Consider the following class declarations.

public class ClassA
{
    public String getValue()
    {
        return "A";
    }

    public void showValue()
    {
        System.out.print(getValue());
    }
}

public class ClassB extends ClassA
{
    public String getValue()
    {
        return "B";
    }
}

Assume the following code segment is executed in a method of a class other than ClassA or ClassB.

ClassA obj = new ClassB();
obj.showValue();

What is printed as a result of executing the code segment?