Chapter 2, Problem 11R

Explanation of Solution

Output of the code:

Create a main class Maryland that extends the State class and it includes printMe() to display the respective header in console.

// Create a class Maryland

public class Maryland extends State

{

  // Null constructor

  Maryland( )

  {

  }

  // Create a method

  public void printMe( )

  {

  System.out.println("Read it.");

  }

Create a main() function and create the objects for the class using new keyword and call the method printMe() to display the respective header.

  // Main function

  public static void main(String[ ] args)

  {

  // Create the objects for classes

  Region east = new State( );

  State md = new Maryland( );

  Object obj = new Place( );

  Place usa = new Region( );

/* Call the method printMe() using state class object.*/

  md.printMe( );

  // Call the method printMe() using object

  east.printMe( );

  // Call the method printMe() in Place class

  ((Place) obj).printMe( );

  //Assign the state class object to object class

  obj = md;

  // Call the method printMe() in maryland class

  ((Maryland) obj).printMe( );

  //Assign the place class object to object class

  obj = usa;

  // Call the method printMe() in place class

  ((Place) obj).printMe( );

  //Assign the state class object to place class

  usa = md;

  // Call the method printMe() in place class

  ((Place) usa).printMe( );

  }

}

Create a class State that extends the class Region and includes a method printMe() to display the header.

// Create a class that extends the Region

class State extends Region

{

  //Null constructor

  State( )

  {

  }

  //Create a method

  public void printMe( )

  {

  //Display the header

  System.out.println("Ship it.");

  }

}

Create a class Region that extends the class Place and includes a method printMe() to display the header...