Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
6th Edition
ISBN: 9780134477367
Author: David J. Barnes, Michael Kolling
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 2, Problem 66E
Write out the outer wrapping of a class called Person. Remember to include the curly brackets that mark the start and end of the class body, but otherwise leave the body empty.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Complete MyProgram such that you can test all conditions
In the Theater constructor you need to instantiate each seat object based upon the information passed to the constructor, making sure they are available.
In the reassign method, make sure the from and to seat assignments are within range and return false if not.
There is test cases included with this exercise, so when you submit your screenshot, it needs to show the test cases passed.
Write out what you think the outer wrappers of the Student and LabClass classes might look like; do not worry about the inner part.
Copy your previous class definition for RectangularSolid from the previous problem, including both methods.
Provide mutators (setters) and accessors (getters) for each of the three parameters. Use the naming convention for these methods that is demonstrated in your textbook (i.e. do not use the property function or decorators).
These methods should allow a program using your code to modify the parameter values after creation and to read individual parameter values.
Chapter 2 Solutions
Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
Ch. 2 - Create a TicketMachine object on the object bench...Ch. 2 - What value is returned if you get the machine's...Ch. 2 - Prob. 3ECh. 2 - Prob. 4ECh. 2 - Create another ticket machine for tickets of a...Ch. 2 - Prob. 6ECh. 2 - Does it matter whether we write...Ch. 2 - Prob. 8ECh. 2 - Put back the word public, and then check whether...Ch. 2 - From your earlier experimentation with the ticket...
Ch. 2 - Prob. 11ECh. 2 - Prob. 12ECh. 2 - Prob. 13ECh. 2 - Prob. 14ECh. 2 - In the following field declaration from the...Ch. 2 - Prob. 16ECh. 2 - Prob. 17ECh. 2 - To what class does the following constructor...Ch. 2 - How many parameters does the following constructor...Ch. 2 - Prob. 20ECh. 2 - Suppose that the class Pet has a field called name...Ch. 2 - Challenge exercise The following object creation...Ch. 2 - Compare the header and body of the getBalance...Ch. 2 - If a call to getPrice can be characterized as...Ch. 2 - If the name of getBalance is changed to getAmount,...Ch. 2 - Prob. 26ECh. 2 - Try removing the return statement from the body of...Ch. 2 - Compare the method headers of getPrice and...Ch. 2 - Do the insertMoney and printTicket methods have...Ch. 2 - Create a ticket machine with a ticket price of...Ch. 2 - How can we tell from just its header that setPrice...Ch. 2 - Complete the body of the setPrice method so that...Ch. 2 - Prob. 33ECh. 2 - Is the increase method a mutator? If so, how could...Ch. 2 - Prob. 35ECh. 2 - Write down exactly what will be printed by the...Ch. 2 - Add a method called prompt to the TicketMachine...Ch. 2 - Prob. 38ECh. 2 - What about the following version?
Ch. 2 - Prob. 40ECh. 2 - Add a showPrice method to the TicketMachine class....Ch. 2 - Create two ticket machines with differently priced...Ch. 2 - Modify the constructor of TicketMachine so that it...Ch. 2 - Give the class two constructors. One should take a...Ch. 2 - Implement a method, empty, that simulates the...Ch. 2 - Prob. 46ECh. 2 - Predict what you think will happen if you change...Ch. 2 - Rewrite the if-else statement so that the method...Ch. 2 - Prob. 49ECh. 2 - In this version of printTicket, we also do...Ch. 2 - Is it possible to remove the else part of the...Ch. 2 - After a ticket has been printed, could the value...Ch. 2 - So far, we have introduced you to two arithmetic...Ch. 2 - Write an assignment statement that will store the...Ch. 2 - Write an assignment statement that will divide the...Ch. 2 - Prob. 56ECh. 2 - Modify your answer to the previous exercise so...Ch. 2 - Why does the following version of refundBalance...Ch. 2 - What happens if you try to compile the...Ch. 2 - What is wrong with the following version of the...Ch. 2 - Add a new method, emptyMachine, that is designed...Ch. 2 - Rewrite the printTicket method so that it declares...Ch. 2 - Challenge exercise Suppose we wished a single...Ch. 2 - List the name and return type of this method:
Ch. 2 - Prob. 65ECh. 2 - Write out the outer wrapping of a class called...Ch. 2 - Write out definitions for the following fields:
Ch. 2 - Write out a constructor for a class called Module....Ch. 2 - Prob. 69ECh. 2 - Correct the error in this method:...Ch. 2 - Write an accessor method called getName that...Ch. 2 - Write a mutator method called setAge that takes a...Ch. 2 - Write a method called printDetails for a class...Ch. 2 - Draw a picture of the form shown in Figure 2.3,...Ch. 2 - Prob. 75ECh. 2 - Create a Student with name "djb" and id "859012"....Ch. 2 - Prob. 77ECh. 2 - Challenge exercise Modify the getLoginName method...Ch. 2 - Consider the following expressions. Try to predict...Ch. 2 - Open the Code Pad in the better-ticket-machine...Ch. 2 - Now add the following in the Code Pad:...Ch. 2 - Add the following: t1.InsertMoney500; What would...Ch. 2 - Prob. 83ECh. 2 - Prob. 84ECh. 2 - Add a field, pages, to the Book class to store the...Ch. 2 - Are the Book objects you have implemented...Ch. 2 - Add a method, printDetails, to the Book class....Ch. 2 - Add a further field, refNumber, to the Book class....Ch. 2 - Modify your printDetai 1 s method to include...Ch. 2 - Prob. 90ECh. 2 - Add a further integer field, borrowed, to the Book...Ch. 2 - Prob. 92ECh. 2 - Prob. 93ECh. 2 - Prob. 94E
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
What do the Ada and COBOL languages have in common?
Concepts of Programming Languages (11th Edition)
Fill in the blanks in each of the following statements: A relation that has no partial functional dependencies ...
Modern Database Management (12th Edition)
What is the difference between a process that is ready and a process that is waiting?
Computer Science: An Overview (13th Edition) (What's New in Computer Science)
Write a program to print the value of EOF.
C Programming Language
3.12 (Date Create a class called Date that includes three pieces Of information as data
members—a month (type ...
C++ How to Program (10th Edition)
What is the purpose of the Application classs abstract start method?
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
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
- Why is it important for a class to have a destructor implemented? With your comment, fill in the spaces.arrow_forwardFor this assignment you are tasked to list out the purposes of the AST and Evaluator classes.arrow_forwardI think you forgot to apply encapsulation in classes where every data is editablearrow_forward
- Challenge exercise The following object creation will result in the constructor of the Date class being called. Can you write the constructor’s header? new Date("March", 23, 1861) Try to give meaningful names to the parametersarrow_forwardWith the addition of electric cars, we have a need to create a subclass of our Car class. In this exercise, we are going to create the Electric Car subclass so that we can override the miles per gallon calculation since electric cars don’t use gallons of gas. The Car class is complete, but you need to complete the ElectricCar class as outlined in the starter code with comments. Once complete, use the CarTester to create both a Car and ElectricCar object and test these per the instructions in the CarTester class. public class CarTester{public static void main(String[] args){// Create a Car object// Print out the model// Print out the MPG// Print the object// Create an ElectricCar object// Print out the model// Print out the MPG// Print the object}} public class Car { //This code is completeprivate String model;private String mpg; public Car(String model, String mpg){this.model = model;this.mpg = mpg;} public String getModel(){return model;} public String getMPG(){return mpg;} public…arrow_forwardCreate a Right Triangle class that has two sides. Name your class rightTraingle. Code getter and setters for the base and the height. (Remember class variables are private.) The class should include a two-argument constructor that allows the program to set the base and height. The constructor should verify that all the dimensions are greater than 0. before assigning the values to the private data members. If a side is not greater than zero, set the value to -1. The class also should include two value-returning methods. One value-returning method should calculate the area of a triangle, and the other should calculate the perimeter of a triangle. If either side is -1, these functions return a -1. The formula for calculating the area of a triangle is 1/2 * b*h, where b is the base and h is the height. The formula for calculating the perimeter of a triangle is b+h+sqrt (b*b+h*h). Be sure to include a default constructor that initializes the variables of the base, height to -1. To test…arrow_forward
- What is encapsulation?Clarify with help of example?arrow_forwardAdd 2 constructors to the Course class. One that takes no arguments and initializes the data to all 0’s and “” (empty strings). And one constructor that takes all 4 arguments, one argument for each property and then sets the properties to these arguments that are passed in. Lastly change the main to use these new Constructors. You will not need to call the set functions any more, but do not remove the set functions from your class. Main Code à Course c1; c1 = new Course(323, “Intro to Php”, “Intro to Php Programming”, 4); c1.display(); Problem #2: Do the same as above for the Account class. Problem #3: Do the same as above for the Person class. Below is my Course code public class Course { int Courzeld; String CourteName; String Description; int creditHours; void display() { System.out.println("Course ID: " + Courzeld); System.out.println("Course Name: " + CourteName); System.out.println("Description: " + Description);…arrow_forwardCreate a "book" class with relevant properties and methods. Be creative in "inventing" them. You must use "setter" and "getter" methods.arrow_forward
- It's time for the opening quidditch match of the season! We represent the various positions for players with the QuidditchPlayer class and its subclasses. Every player begins with a base_energy level, but every position requires a different proportion of energy. Fill in the energy method for the Beater, Chaser, Seeker, and Keeper classes, according to their docstrings. In addition, fill in the init____ method for the Chaser class. class Beater (QuidditchPlayer): role="bludgers" def energy (self, time): ****** Returns the amount of energy left after playing for time minutes. After playing for time minutes, Beaters lose their base energy level divided by the number of minutes. If time is 0, catch the ZeroDivisionError and print "You can't divide by zero!" instead. >>> fred Beater ("Fred Weasley", 640) >>> fred.energy (40) 624.0 >>> fred.energy (0) You can't divide by zero! ***** "***** YOUR CODE HERE *****" Use OK to test your code: python3 ok -q Beater.energy class Chaser…arrow_forwardAnswer the following and code in Java Thank youarrow_forwardTHE BELOW IS IMPORTANT Rewrite the above code so that It has all of the correct access modifiers for good encapsulation. Your code obeys the principle of encapsulation that obliges you to put each method in the proper class. Your code uses NO getters and NO additional classes or methods. You are welcome to modify any existing methods (including signatures and bodies) and/or move them between the existing classes. Your code DOES NOT modify any of the constructors. Important notes: You DO NOT have to write a main method. You DO NOT have to write tests. You DO NOT have to write Javadocs. You DO NOT have to write interfaces to encapsulate data structures. There should be no incorrect syntax or other compile-time errors.arrow_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 Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable 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
Java Math Library; Author: Alex Lee;https://www.youtube.com/watch?v=ufegX5o8uc4;License: Standard YouTube License, CC-BY