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
Question
Chapter 2, Problem 93E
Program Plan Intro
To create a new project, heater-exercise with a new class Heater and declare a single variable temperature of type double. The value of the variable temperature is set to 15.0 using the constructor. Two methods, warmer() and cooler() are used to change the temperature by 5.0 degrees. An accessor method, getTemperature() is also used.
Program Plan:
Write a program in BlueJ to create a new class Heater. In the class, a single variable temperature of type double is used. The value for the field temperature is set to 15.0 using the constructor. The method warmer() increases the temperature by 5 degrees and cooler() decreases the temperature by 5 degrees. The method getTemperature() is used to return the value of the temperature.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
PLEASE ENSURE TO USE THE FRAMEWORK PROVIDED IN THE IMAGES, AND THAT IT WORKS WITH THE TESTER CLASS. PLEASE EDIT BOTH THE TEST CLASS, DO NOT EDIT THE MAIN METHOD.
Write a BankAccountTester class whose main method constructs a bank account, deposits $1,000, withdraws $500, withdraws another $400, and then prints the remaining balance. Also print the expected result.
using Java, create a class where the user will receive a notification if they have been inactive for a week.
Make sure each class has at least two attributes (instance variables) and two methods, plus a constructor to initialize any attributes as needed. Once you have written the classes, use the JUnit features in NetBeans to create unit tests for your two classes.
1. Create a new project in BlueJ.2. Create a class named LemonadeStand.3. Create all methods and fields as defined in the UML diagram shown at the end of this document.4. Leave all methods blank or return dummy values to get the project to compile. For example, if amethod needs to return an int, simply put “return 1;” in the body of the method. You can go aheadand fill in the constructor, accessor, and mutator bodies if you wish, but you don’t necessarily have todo it at this time.
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
Knowledge Booster
Similar questions
- Can you draw a class diagram on the text with the appropriate classes, attributes, methods, and relationships. (Please use the draw.io web site for drawing.) Here are the main classes and their relationships: HoneynetCentralServer Attributes: cronjobInterval Relationships: has many Honeypots has a LogProcessor Honeypot Attributes: ipAddress, sshCredentials Relationships: has many LogEntries LogEntry Attributes: timestamp, message, actionType (e.g., delete, create in FTP), attackLevel (low, medium, or high) Relationships: belongs to a Honeypot LogProcessor (Nodejs tool) Attributes: ruleFilters Methods: processLogEntries(logEntries) Relationships: processes LogEntries MongoDBAtlasDatabase Attributes: connectionString Methods: storeLogEntries(logEntries) Relationships: stores LogEntries ManagementTool (ElectronJS) Attributes: graphicalLibraries, visualLibraries Methods: displayData(data) Relationships: displays data from MongoDBAtlasDatabase ExternalAPI Attributes: apiUrl,…arrow_forwardCreate a new project, cardCredit-exercise, within BlueJ. Create a class, CreditCard, that contains the following fields: • credit - The current available card credit of type double • creditLimit - The card credit limit of type double • numericPin - The (numeric) pin of the credit card of type int • isLoggedIn - A field of type boolean that indicates whether the user is logged in or out Define a constructor that takes two parameters (of the appropriate type) and sets the values of creditLimit and numericPin accordingly. In the constructor the credit field should be initially set equal to the credit limit and the value of isLoggedIn should be set to false. Define the method logIn that takes a pin as a parameter and if this pin is correct sets the isLoggedIn field to true, otherwise print a message to the user indicating that the inserted pin is wrong. Define the method logOut that sets the value of the field isLoggedIn to false. Define an accessor method getCurrentCredit that, only when…arrow_forwardDraw the UML diagram for the class and then implement the class. For more details about UML diagrams see the “UMLNotation.pdf” by Y. Daniel Liang, located in LabFiles folder. Discuss: Should the class Square have a main method? Use lab_02 as the name of this Java Application project.arrow_forward
- “Reverse - engineer” the code to produce an Object Diagram for the Producer and the Consumer classes found in the lower portion of the code. (Ignore the CandP class, it is just the staging for the application.) Using your common sense describe how you could improve the efficiency of this process in a few sentences.arrow_forwardCreate a new project for this program called TestOldMaid and add a class with a main() method. In the project: Copy your Deck and Card class from the earlier project into it. Create a subclass of Deck called OldMaidDeck. It is special because one of the Queens is missing so it only has 51 cards. Create a constructor method that calls the super class constructor, then removes a queen. Override the toString method so it returns the name of the deck and the number of cards in it. Write the test main() method. Create an OldMaidDeck object and deal all the cards to six players. It is ok if not everyone has an equal number of cards. Use arrays or ArrayLists for the players hands. Show the hands of all 6 players. Refer to the web to find out more about the Old Maid card game: https://bicyclecards.com/how-to-play/old-maid/ Fully document all classes with your name, date and description. And each data member and method is documented. Each block that does something is also documented.arrow_forwardCreate a new project for this program called TestOldMaid and add a class with a main() method. In the project: Copy your Deck and Card class from the earlier project into it. Create a subclass of Deck called OldMaidDeck. It is special because one of the Queens is missing so it only has 51 cards. Create a constructor method that calls the super class constructor, then removes a queen. Override the toString method so it returns the name of the deck and the number of cards in it. Write the test main() method. Create an OldMaidDeck object and deal all the cards to six players. It is ok if not everyone has an equal number of cards. Use arrays or ArrayLists for the players hands. Show the hands of all 6 players. Refer to the web to find out more about the Old Maid card game. Fully document all classes with your name, date and description. And each data member and method is documented. Each block that does something is also documented. Without removing the Queensarrow_forward
- (1) Add an __init__ method to the Widget class below. Each object of type Widget should have an instance variable called name and an instance variable called cost that represents a cost in dollars; those values are passed in when an object of type Widget is initialized. (2) Add a method to class Widget called is_cheap that returns True if the cost is less than $10, and False otherwise. (3) Add proper doctrings along with two examples for each method. You may use the Sample Usage code given below in your work.arrow_forwardAdd a new folder named “Model” to the project.6. In the Models folder, add a class named Product.7. Add a few properties like Id, Name, Description, and Price to the product class. The product should also be of some kind and for that, a category model is defined and a CategoryId property is added to the product model.8. Similarly, add a Category model with properties like Id, Name, Description, Pricearrow_forwardjava create a simulation of hospital waiting over a 24 hour period of time by creating two class and a driver class that will implement / utilize the first two classes. the first two classes will be a patience class and waiting room class. a) the patience class will have atleast two attributes : name, time arrived. you can assume patients will only at the top of the hour. The class should have a two argument constructorarrow_forward
- Can I get a help with this in Java please? Introduce a new class, called Borrower to the project. Its purpose is to represent the borrower of the CD. It should have two fields surname and libraryId; where the latter is a mix of letters and numbers, and a suitable constructor with parameters for only these two fields in the order specified above as well as appropriate accessor methods.arrow_forwardConsider a class ScienceFairProjectRating that will be used to help judge a science fair project. The attributes for the new class are The name of the project A unique identification string for the project The name of the person A rating for the creative ability (max. 30) A rating for the scientific thought (max. 30) A rating for thoroughness (max. 15) A rating for technical skills (max. 15) A rating for clarity (max. 10) It will have methods to Get the number of judges Get all the ratings for a particular project Return the total of the ratings for a particular project Return the maximum total rating possible Return a string showing a project’s rating in a format suitable for display Write a method heading for each method. Write preconditions and postconditions for each method. Write some Java statements that test the class. Implement the class.arrow_forwardthe following code is centered around data collection, filtering, and using the Singleton pattern in Java, which is all part of a mockup "student information management system", with its purpose being making mockup new student accounts. I've been having issues using the software “dbeaver” for making java projects. Please organize the below code into an executable project “simulation.student” and given step by step instruction as to how this was done Address.java public class Address {private String _city;private String _state;private String _streetName; // Newprivate int _streetNumber; // Newprivate int _apartmentNumber; // New public Address(String city, String state, int zip, String streetName, int streetNumber, int apartmentNumber) {setCity(city);setState(state);setZip(zip);setStreetName(streetName);setStreetNumber(streetNumber);setApartmentNumber(apartmentNumber);} public String getCity() {return _city;} public void setCity(String city) {_city = city;} public String getState()…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