Java this in parent and child not working as expected

I'm misunderstanding something really basic with inheritance. I have a parent class:

public class Parent {
    String s = "Parent";
    Parent () {}
    String getS() {
        return this.s;
    }
}

and a child class:

public class Child extends Parent {
    String s = "Child";
    Child() { }
}

Main is like:

Parent parent = new Parent();
Child child = new Child();
Log.e(TAG, "parent:" + parent.getS());
Log.e(TAG, "child:" + child.getS());

I expect parent.getS() to return "Parent" and child.getS() to return "Child" but both return "Parent." Doesn't the method prefix determine the this for the method when called this way?

Thank you Steve S.