public abstract class Mother {
  public int getAge() { return 45; }
  public abstract class Son {
    public int getAge() { return 38; }
  }
  public static void main(String[] args) {
    Mother m = new Mother() {
      public int getAge() { return 22; }
    };
    Mother.Son s = m.new Son() {
      public int getAge() { return 57; }
    };
    System.out.println(s.getAge() + " " + m.getAge());
  }
}