Chapter 10.2, Problem 10.5CP

Output of the given program:

// Class definition

public class Sample {

// Main method

public static void main(String[] args)

{

// Create object for subclass

Sky object= new Sky("Blue");

}

}

//Superclass definition

public class Ground

{

// Constructor

public Ground()

{

// Display the statement

System.out.println("You are on the ground.");

}

// Method definition

public Ground(String groundColor)

{

// Display the statement

System.out.println ("The ground is " +groundColor) ;

}

}

//Subclass definition

public class Sky extends Ground

{

// Constructor

public Sky()

{

// Display the statement

System.out.println("You are in the sky.");

}

// Method definition

public Sky(String skyColor)

{

// Call a method defined in superclass

super("Green");

// Display the statement

System.out.println("The sky is " +skyColor);

}

}

In the above program,

• There are two classes,
  • “Ground” is the superclass and “Sky” is the subclass.
• In “Ground” superclass,
  • The constructor “Ground” is created and the statement which is to be printed is given...