Java: An Introduction to Problem Solving and Programming (8th Edition)
8th Edition
ISBN: 9780134462035
Author: Walter Savitch
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 8, Problem 8E
Create an abstract class PayCalculator that has an attribute payRate given in dollars per hour. The class should also have a method computePay(hours) that returns the pay for a given amount of time.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Create an interface Wheel with methods setWheels (int c) and getWheels () and a class Vehicle with abstract methods getColor () and getBrand (). Now, create a concrete class Taxi with additional method setDriver (String name) that inherits both Wheel and Vehicle. (Note: Concrete classes don’t have any abstract method)
Write in java an abstract class Student that includes the following hidden attributes: id(int), name(String), major(String) and grade(double), then create setter and getter for each of them. Write two classes that inherited from Student: ItStudent and ArtStudent. The grade for ItStudent is calculated as: grade = mid*0.30 + project*0.30 + final*40 and the grade for ArtStudent is calculated as: grade = mid*0.40 + report*0.10 + final*50. Crate main class that achieve the following:a. Create an array of some Student objects from both ItStudent and ArtStudent classes.b. Sort the Student objects by grade in descending order using functions.c. Save the sorted objects into file.
Create an abstract class called Employee that has an abstract method called calculatePay() which calculates the total pay per employee using the rate per hour = R100. The method should accept the number of hours the employee has worked. Create a child class called employeeChild and provide the implementation. In the main method invoke that method and get the number of hours worked from the user and pass it to the called method.
Chapter 8 Solutions
Java: An Introduction to Problem Solving and Programming (8th Edition)
Ch. 8.1 - Prob. 1STQCh. 8.1 - Suppose the class SportsCar is a derived class of...Ch. 8.1 - Suppose the class SportsCar is a derived class of...Ch. 8.1 - Can a derived class directly access by name a...Ch. 8.1 - Can a derived class directly invoke a private...Ch. 8.1 - Prob. 6STQCh. 8.1 - Suppose s is an object of the class Student. Base...Ch. 8.2 - Give a complete definition of a class called...Ch. 8.2 - Add a constructor to the class Student that sets...Ch. 8.2 - Rewrite the definition of the method writeoutput...
Ch. 8.2 - Rewrite the definition of the method reset for the...Ch. 8.2 - Can an object be referenced by variables of...Ch. 8.2 - What is the type or types of the variable(s) that...Ch. 8.2 - Prob. 14STQCh. 8.2 - Prob. 15STQCh. 8.2 - Consider the code below, which was discussed in...Ch. 8.2 - Prob. 17STQCh. 8.3 - Prob. 18STQCh. 8.3 - Prob. 19STQCh. 8.3 - Is overloading a method name an example of...Ch. 8.3 - In the following code, will the two invocations of...Ch. 8.3 - In the following code, which definition of...Ch. 8.4 - Prob. 23STQCh. 8.4 - Prob. 24STQCh. 8.4 - Prob. 25STQCh. 8.4 - Prob. 26STQCh. 8.4 - Prob. 27STQCh. 8.4 - Prob. 28STQCh. 8.4 - Are the two definitions of the constructors given...Ch. 8.4 - The private method skipSpaces appears in the...Ch. 8.4 - Describe the implementation of the method drawHere...Ch. 8.4 - Is the following valid if ShapeBaSe is defined as...Ch. 8.4 - Prob. 33STQCh. 8.5 - Prob. 34STQCh. 8.5 - What is an advantage of having the main...Ch. 8.5 - What Java construct allows us to define and...Ch. 8 - Consider a program that will keep track of the...Ch. 8 - Implement your base class for the hierarchy from...Ch. 8 - Draw a hierarchy for the components you might find...Ch. 8 - Suppose we want to implement a drawing program...Ch. 8 - Create a class Square derived from DrawableShape,...Ch. 8 - Create a class SchoolKid that is the base class...Ch. 8 - Derive a class ExaggeratingKid from SchoolKid, as...Ch. 8 - Create an abstract class PayCalculator that has an...Ch. 8 - Derive a class RegularPay from PayCalculator, as...Ch. 8 - Create an abstract class DiscountPolicy. It should...Ch. 8 - Derive a class BulkDiscount from DiscountPolicy,...Ch. 8 - Derive a class BuyNItemsGetOneFree from...Ch. 8 - Prob. 13ECh. 8 - Prob. 14ECh. 8 - Create an interface MessageEncoder that has a...Ch. 8 - Create a class SubstitutionCipher that implements...Ch. 8 - Create a class ShuffleCipher that implements the...Ch. 8 - Define a class named Employee whose objects are...Ch. 8 - Define a class named Doctor whose objects are...Ch. 8 - Create a base class called Vehicle that has the...Ch. 8 - Create a new class called Dog that is derived from...Ch. 8 - Define a class called Diamond that is derived from...Ch. 8 - Prob. 2PPCh. 8 - Prob. 3PPCh. 8 - Prob. 4PPCh. 8 - Create an interface MessageDecoder that has a...Ch. 8 - For this Programming Project, start with...Ch. 8 - Modify the Student class in Listing 8.2 so that it...Ch. 8 - Create a JavaFX application that uses a TextField...Ch. 8 - Prob. 10PP
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
What is the output produced by the following? Stringtest=abcdefg;System.out.printlntest.length();System.out.pri...
Absolute Java (6th Edition)
What is direct recursion? What is indirect recursion?
Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
Fat Percentage Calculator Create an application that allows the user to enter the number of calories and fat gr...
Starting Out With Visual Basic (8th Edition)
Write Java statements to accomplish each of the following tasks: Test whether variable count is greater than 10...
Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)
What is the purpose of an objects sizing handles?
Starting out with Visual C# (4th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Write an abstract class Student that includes the following hidden attributes: id(int), name(String), major(String) and grade(double), then create setters and getters for them. Write two classes that inherited from Student: ItStudent and ArtStudent. The grade for ItStudent is calculated as: grade = mid*0.30 + project*0.30 + final*0.40 and the grade for ArtStudent is calculated as: grade = mid*0.40 + report*0.10 + final*0.50. Crate main class that achieve the following: a. Declare and initialize an array of five Student objects from both ItStudent and ArtStudent classes. b. Sort the Student objects by grade in descending order using functions. c. Save the sorted objects into text file.arrow_forwardCreate an abstract CardGame which contains a “deck” of 52 playing cards that uses a Card class that holds a suit and value for each Card object. It also contains an integer field that holds the number of cards dealt to a player in a particular game. The class contains a constructor that initializes the deck of cards with appropriate values (e.g., “King of Hearts”), and a shuffle() method that randomly arranges the positions of the Cards in the array. The class also contains two abstract meb. Create two child classes that extend CardGame. You can choose any games you prefer. For example, you might create a Poker class or a Bridge class. Create a constructor for each child class that initializes the field that holds the number of cards dealt to the correct value. (For example, in standard poker, a player receives five cards, but in bridge, a player receives 13.) Create an appropriate displayDescription() and deal() method for each child class.arrow_forwardImagine a publishing company that markets both book and audiocassette versions of its works. I it markets both book and audiocassette versions of its works. create a class called publication that stores the title (a string) and price (type float) and date of a publication. Provide getters/setters and constructor also write an abstract method isOversize() .From this class derive two classes: book, which adds a page count (type int); and tape, which adds a playing time in minutes (type float). Each of the classes should have a getter/setters and constructors and provide definition to function called isOversize() to the book and tape classes. Let’s say that a book with more than 800 pages, or a tape with a playing time longer than 90 minutes (which would require two cassettes), is considered oversize. You can access this function from main() and display the string “Oversize” for oversize books and tapes when you display their other data. explain the working in your wordsarrow_forward
- Write an abstract class Student that includes the following hidden attributes: id(int), name(String), major(String) and grade(double), then create setters and getters for them. Write two classes that inherited from Student: ItStudent and ArtStudent. The grade for ItStudent is calculated as: grade = mid*0.30 + project*0.30 + final*0.40 and the grade for ArtStudent is calculated as: grade = mid*0.40 + report*0.10 + final*0.50. Crate main class that achieve the following: Declare and initialize an array of five Student objects from both ItStudent and ArtStudent classes. Sort the Student objects by grade in descending order using functions. Save the sorted objects into text file.arrow_forwardImagine a publishing company that markets both book and audiocassette versions of its works. I it markets both book and audiocassette versions of its works. create a class called publication that stores the title (a string) and price (type float) and date of a publication. Provide getters/setters and constructor also write an abstract method isOversize() .From this class derive two classes: book, which adds a page count (type int); and tape, which adds a playing time in minutes (type float). Each of the classes should have a getter/setters and constructors and provide definition to function called isOversize() to the book and tape classes. Let’s say that a book with more than 800 pages, or a tape with a playing time longer than 90 minutes (which would require two cassettes), is considered oversize. You can access this function from main() and display the string “Oversize” for oversize books and tapes when you display their other data.arrow_forwardDefine a class Shape with an abstract method CalculateArea(). Define two additional classes for a triangle and a rectangle with fields width and height (values being set through appropriate constructors), which implement CalculateArea(). This method has to return the areas of the rectangle (height*width) and the triangle (height*width/2). Define another class for a circle with an appropriate constructor, which initializes the two fields (height and width) with the same value (the radius) and implement the abstract method for calculating the area. Create an array of different shapes and calculate the area of each shape in another array.arrow_forward
- Implement a JAVA application that keeps track of package deliveries to consumers. Theapplication consists of the following classes:• Item: Create a class called Item. The class has two member variables oftype String named name and description and provides getter and settermethods for both.• Mail (abstract class): Implement an abstract class called Mail . The class hasa member variable of type String named address and a getter method for it.• Letter: Implement a class called Letter that inherits from Mail . The classhas one member variable of type String named contents.• Package: Implement a class called Package that inherits from Mail . Theclass has one member variable of type Item[] named items and a gettermethod for it.• DeliveryTruck: Implement a class called DeliveryTruck with a singlemember variable of type Mail[] of length 10. Add the following method:o void load(Mail mail): This method stores the given mail argumentat the next available spot in the member variable.arrow_forwardCreate a Dog and a Cat class, each of which inherit from Animal. Each class should have a constructor which initialses their name and a hello method. The cat's hello method should return the string "Meow" and the dog's hello method should return the string "Woof". The Animal class is public abstract class Animal { public Animal(String n) { name = n; } abstract String hello(); public String greeting() { return hello() + ", I am + name; } // private private String name; } Your classes will be used in the following Main class. public class Main { public static void main(String [] args) { Animal cat = new Cat("Angel"); Animal dog = new Dog("Fido"); System.out.println(cat.greeting()); System.out.println(dog.greeting()); } } Note that your Cat and Dog classes must not supply a greeting method. They should use the greeting method from the Animal class.arrow_forwardCreate a project to play a bunch of games. Add a class that has main() in it. Create an abstract class called Game. Define one instance variable for the name of the game. Define a constructor that takes the name of the game as a parameter and sets it. Define an abstract method called playGame. It takes no arguments and returns void. Create a child class of Game called BoardGame. Rather than implementing playGame, declare BoardGame abstract. Create a child class of BoardGame called Chess or Battleship or Monopoly or whatever board game you want. Implement the playGame with only a message that says the name of the game and that it is being played. Create a child class of Game called CardGame. Rather than implementing playGame, declare CardGame abstract. Create a child class of CardGame for War. Implement the playGame method by with a message that says the game of war is being played. Create a child class of Game called VideoGame. Rather than implementing playGame,…arrow_forward
- The total cost of a group of items at a grocery store is based on the sum of the individual product prices and the tax (which is 5.75%). Products that are considered “necessities” are not taxed, whereas products that are considered “luxuries” are. The Product class is abstract, and it has a method called getTotalPrice. Your task is to create two subclasses of Product: NecessaryProduct and LuxuryProduct and implement the getTotalPrice method in each of these classes appropriately. Then modify the driver program to instantiate four products (two necessary and two luxury) and store them in the product array, print out each item in the array, and display the total cost of the items. You should not make any changes at all to Product.java, and you should only add to ShoppingTripStartingCode.java. Do not change any code that is already present Example(Cheese and bread are necessities and soda and candy are luxuries)Cheese…arrow_forwardsolve this by arraylist in the last of the question it has been told Create abstract class Pet , which is the abstract superclass of all animals. Declare a integer attribute called legs, which records the number of legs for this animal. Define a constructor that initializes the legs attribute. Declare an abstract method eat. Declare a concrete method walk that prints out something about how the animals walks (include the number of legs). Create the Dog class. The Dog class extends the Pet class. This class must include a String attribute to store the name and food of the pet Define a default constructor that calls the superclass constructor to specify that all dogs have 4 legs and name. override the eat and walk method. Create the Cat class that extends Pet. This class must include a String attribute to store the name of the pet, and a string to save food . Define a constructor that takes one String parameter that specifies the cat's name and food. This constructor must also…arrow_forwardInstructions: Write your answer on a piece of paper with your name on top. Take a picture and submit within the allocated time limit. Problem 1: Implement class Employee as illustrated below. Apply appropriate constructors, encapsulate, and override toString and equals. Student Course Problem 2: «interface Payable abstract Employee Person SalariedEmployee Idno Name Employee Superclass Department Salary Subclass getPayment Amount() firstName, lastName, SSN weeklysalary Given the class hierarchy: 1. Define the interface Payable. 2. Define the class Employee that implements Payable and encapsulate. 3. Define SalariedEmployee and encapsulate. Implement getPayment Amount(). getPayment Amount() - returns a double amount that must be paid for an object of any class that implements the interface. For SalariedEmployee, it would just return the value returned by getWeeklySalary(). for new files: 128MBarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill EducationStarting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSONDigital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
- C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSONDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningProgrammable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education
6 Stages of UI Design; Author: DesignerUp;https://www.youtube.com/watch?v=_6Tl2_eM0DE;License: Standard Youtube License