继承和默认构造函数

/*
 from n o w j a   v  a . c o m - 时  代  Java 
*/

class Ball

{

     public Ball()

      {

           System.out.println(

                 "Hello from the Ball constructor");

      }

}


class BaseBall extends Ball

{

     public BaseBall()

      {

           System.out.println(

                 "Hello from the BaseBall constructor");

      }

}