bigegg.java

java包和接口部分的课件

//: c08:BigEgg.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// An inner class cannot be overriden 
// like a method.

class Egg {
  protected class Yolk {
    public Yolk() {
      System.out.println("Egg.Yolk()");
    }
  }
  private Yolk y;
  public 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();
  }
} ///:~