OnJava8-Examples/innerclasses/BigEgg.java

// innerclasses/BigEgg.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// An inner class cannot be overridden like a method

class Egg {
  private Yolk y;
  protected class Yolk {
    public Yolk() {
      System.out.println("Egg.Yolk()");
    }
  }
  Egg() {
    System.out.println("New Egg()");
    y = new Yolk();
  }
}

public class BigEgg extends Egg {
  public class Yolk {
    public Yolk() {
      System.out.println("BigEgg.Yolk()");
    }
  }
  public static void main(String[] args) {
    new BigEgg();
  }
}
/* Output:
New Egg()
Egg.Yolk()
*/