Java Reference
In-Depth Information
The code is not very object-oriented and does not support information hiding in
the Alien class. Rewrite the code so that inheritance is used to represent the
different types of aliens instead of the “type” parameter. This should result in
deletion of the “type” parameter. Also rewrite the Alien class to hide the member
variables and create a “ getDamage ” method for each derived class that returns
the amount of damage the alien inflicts. Finally, rewrite the calculateDamage
method to use getDamage and write a main method that tests the code.
4.
Define a class called Administrator , which is a derived class of the class
SalariedEmployee in Display 7.5. You are to supply the following additional
instance variables and methods:
An instance variable of type String that contains the administrator's title (such
as "Director" or "Vice President" ).
An instance variable of type String that contains the administrator's area of
responsibility (such as "Production" , "Accounting" , or "Personnel" ).
An instance variable of type String that contains the name of this
administrator's immediate supervisor.
Suitable constructors, and suitable accessor and mutator methods.
A method for reading in an administrator's data from the keyboard.
Override the definitions for the methods equals and toString so they are
appropriate to the class Administrator .
Also, write a suitable test program.
5.
Give the definition of a class named Doctor whose objects are records for a clinic's
doctors. This class will be a derived class of the class SalariedEmployee given in
Display 7.5. A Doctor record has the doctor's specialty (such as "Pediatrician" ,
"Obstetrician" , "General Practitioner" , and so forth; so use the type String )
and office visit fee (use type double ). Be sure your class has a reasonable comple-
ment of constructors, accessor and mutator methods, and suitably defined equals
and toString methods. Write a program to test all your methods.
6.
Create a class called Vehicle that has the manufacturer's name (type String ),
number of cylinders in the engine (type int ), and owner (type Person given
below). Then, create a class called Truck that is derived from Vehicle and has
the following additional properties: the load capacity in tons (type double since
it may contain a fractional part) and towing capacity in pounds (type int ). Be
sure your class has a reasonable complement of constructors, accessor and muta-
tor methods, and suitably defined equals and toString methods. Write a pro-
gram to test all your methods.
The definition of the class Person is below. Completing the definitions of the
methods is part of this programming project.
public class Person
{
private String name;
Search WWH ::




Custom Search