Why assume when you can write code and test? Make 3 files and run
XMLTester. What do you see being printed?

import java.beans.XMLEncoder;
import java.io.*;

public class XMLTester {

  public static void main(String[] args) {
    XMLEncoder e = new XMLEncoder(System.out);
    e.writeObject(new Baz(300, 400));
    e.close();
  }
}

public class Foo {
  private int n = 100;
  public int getFooValue() { return n; }
  public void setFooValue(int i) { n = i; }
}

public class Baz extends Foo {
  private int n = 200;
  public Baz() {};
  public Baz(int i, int j) { n = i; setFooValue(j); }
  public int getBazValue() { return n; }
  public void setBazValue(int i) { n = i; }
}