Slight confusion regarding overriding where variables are concerned

Question

I\'m preparing for the SCJP (recently rebranded as OCPJP by Oracle) and one particular question that I got wrong on a mock exam has confused me, the answer description doesn

Answer 1

You are calling method from c1: System.out.println(c1.getObject().x);

c1 reference type is:

public class CovariantTest 
{
    public A getObject() 
    {
       return new A();
    } 
    public static void main(String[]args) 
    {
       CovariantTest c1 = new SubCovariantTest();
       System.out.println(c1.getObject().x);
    }
}

so for this: c1.getObject() return type is A. from A you getting directly attribute not method, as you mention java does not override attributes, so it is grabbing x from A