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
Videos
Textbook Question
Chapter 5, Problem 7E
Consider a class MotorBoat that represents motorboats. A motorboat has attributes for
- The capacity of the fuel tank
- The amount of fuel in the tank
- The maximum speed of the boat
- The current speed of the boat
- The efficiency of the boat’s motor
- The distance traveled
The class has methods to
- Change the speed of the boat
- Operate the boat for an amount of time at the current speed
- Refuel the boat with some amount of fuel
- Return the amount of fuel in the tank
- Return the distance traveled so far
If the boat has efficiency e, the amount of fuel used when traveling at a speed s for time t is e × s2 × t. The distance traveled in that time is s × t.
- a. Write a method heading for each method.
- b. Write preconditions and postconditions for each method.
- c. Write some Java statements that test the class.
- d. Implement the class.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
draw er diagram for drivers (identified by driver number name and address) take out vehicles to make deliveries. A vehicle (identifies by vehicle number, make and model. It is possible for a vehicle to be taken out more than once on a given day. Every time a driver takes out a vehicle incurs expenses of allowed types (e.g fuel cost, meals). Each expenses has a code number, name, and amount each time an expense is incurred.
A company has several employees, all with different names, who perform interviews with
job applicants (one applicant is interviewed by one employee). The job applicants also have
different names. The interviewer makes appointments for interviews with the applicants.
Each applicant may be interviewed at several occasions, possibly by different interviewers,
but in that case the interviews take place during different days.
The company has special interview rooms. Each interviewer uses the same room for all
interviews during a day. A room may, however, be used by different interviewers during a
day, as long as the interviews don't collide in time.
The reservation of interview appointments is to be computerized. The database devel-
oper has decided to use a single relation for all data, with the following schema:
Interviews(interviewer, applicant, day, time, room)
a) From the text, find functional dependencies in the relation.
b) Find the keys of the relation.
c) Show that the relation is…
Assignment
As an initiation into the study of ethics, carefully read each of the following scenarios. After
reflection, come up with your own answer to each of the questions.
Scenario 1
Alexis, a gifted high school student, wants to become a doctor. Because she comes from a poor
family, she will need a scholarship in order to attend college. Some of her classes require
students to do extra research projects in order to get an A. Her high school has a few older PCs,
but there are always long lines of students waiting to use them during the school day. After
school, she usually works at a part-time job to help support her family.
One evening Alexis visits the library of a private college a few miles from her family's
apartment, and she finds plenty of unused PCs connected to the Internet. She surreptitiously
looks over the shoulder of another student to learn a valid login/password combination. Alexis
returns to the library several times a week, and by using its PCs and printers she…
Chapter 5 Solutions
Java: An Introduction to Problem Solving and Programming (8th Edition)
Ch. 5.1 - Consider the program in Listing 5.4 . Suppose you...Ch. 5.1 - Prob. 2STQCh. 5.1 - Prob. 3STQCh. 5.1 - Suppose every species in the world has a peculiar...Ch. 5.1 - Revise the definition of the method writeOutput in...Ch. 5.1 - Revise the definition of the method readInput in...Ch. 5.1 - Revise the definition of the method...Ch. 5.1 - What is the meaning of (int) that appears in the...Ch. 5.1 - Prob. 9STQCh. 5.1 - Define a method called getDensity that could be...
Ch. 5.1 - Define a method called changePopulation that could...Ch. 5.1 - Define a method called changePopulation that could...Ch. 5.2 - In Listing 5.12, we set the data for the object...Ch. 5.2 - Give preconditions and postconditions for the...Ch. 5.2 - What is an accessor method? What is a mutator...Ch. 5.2 - Give the complete definition of a class called...Ch. 5.2 - Prob. 17STQCh. 5.2 - In the definition of the method in Listing 5.15,...Ch. 5.2 - What is a well-encapsulated class definition?Ch. 5.2 - When should an instance variable in a class...Ch. 5.2 - Prob. 21STQCh. 5.2 - In a class definition, is anything private ever...Ch. 5.2 - In a class definition, is the body of any method...Ch. 5.3 - What is a reference type? Are class types...Ch. 5.3 - When comparing two quantities of a class type to...Ch. 5.3 - Prob. 26STQCh. 5.3 - Write a method definition for a method called...Ch. 5.3 - Given the class Species as defined in Listing...Ch. 5.3 - After correcting the program in the previous...Ch. 5.3 - What is the biggest difference between a parameter...Ch. 5.3 - Prob. 31STQCh. 5.3 - Write an equals method for the class Person...Ch. 5.4 - Rewrite the method drawFaceSansMouth in Listing...Ch. 5 - Design a class to represent a credit card. Think...Ch. 5 - Repeat Exercise 1 for a credit card account...Ch. 5 - Repeat Exercise 1 for a coin instead of a credit...Ch. 5 - Repeat Exercise 1 for a collection of coins...Ch. 5 - Consider a Java class that you could use to get an...Ch. 5 - Consider a class that keeps track of the sales of...Ch. 5 - Consider a class MotorBoat that represents...Ch. 5 - Prob. 8ECh. 5 - Prob. 9ECh. 5 - Prob. 10ECh. 5 - Write a program to answer questions like the...Ch. 5 - Define a class called Counter. An object of this...Ch. 5 - Prob. 3PCh. 5 - Define a Trivia class that contains information...Ch. 5 - Define a Beer class that contains the following...Ch. 5 - Write a grading program for an instructor whose...Ch. 5 - Add methods to the Person class from Self-Test...Ch. 5 - Create a class that represents a grade...Ch. 5 - Write a program that uses the Purchase class in...Ch. 5 - Write a program to answer questions like the...Ch. 5 - Consider a class that could be used to play a game...Ch. 5 - Consider a class BasketballGame that represents...Ch. 5 - Consider a class ConcertPromoter that records the...Ch. 5 - Prob. 9PPCh. 5 - Consider a class Movie that contains information...Ch. 5 - Repeat Programming Project 18 from Chapter 4, but...Ch. 5 - Prob. 12PP
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Explain why SQL is called a set-oriented language.
Modern Database Management
In the following exercises, write a program to carry out the task. The program should use variables for each of...
Introduction To Programming Using Visual Basic (11th Edition)
How is a constructor named?
Starting Out with Java: Early Objects (6th Edition)
(Displaying a Square of Asterisks) Write a method squareOfAsterisks that displays a solid square (the same numb...
Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)
What characteristic of Rubys arithmetic operators makes them unique among those of other languages?
Concepts Of Programming Languages
Redesign the logic for segment a in the Applied Logic to include the letter F in the display.
Digital Fundamentals (11th 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
- Draw the class diagram for IU library. An IU library has books, journals, and newspaper. These are the library items. All library material has an id_number and a title. Among all the materials, only books can be loaned to the IU students and staffs. Staff can borrow journals for their research. When a user’s (staff and students) borrows books, the librarian must scanned the card of IU users and record the borrower’s ID, loan date and return date. For users, the library maintains their name, ID and phone number. Each user has library card. Draw a class diagram for the description above. Make sure to show attributes, multiplicities and relationship, where appropriate.arrow_forwardEvery company having customers maintains customer accounts and supports a complete life cycle of the account from its creation until it is closed. There are differences in what are the stages (states) in the account's life cycle, and what are conditions or events causing account to change its state.For the user account to be created, it has to meet some initial requirements. For example, user id (used as a login name) must be unique, at least for the existing accounts. After account was created, it might need to be verified. Verification depends on the company and could include e-mail, phone, and/or address verification. If account was not verified during some predefined period of time, that account could be moved to the suspended accounts. New, active, or suspended accounts could be cancelled at any time by client's request. Note, the precondition for this usually includes payment of any outstanding balances, and might require some separate account state or substate to handle this…arrow_forwardActivity: Interaction Models Consider the university system. Departments offer courses. Professors teach courses. Students can declare majors and are admitted to university departments if they meet minimum requirements. Students and professors have schedules based on courses they take/teach. Courses have rosters, scheduled times, and instructors. Courses may get full. Students can request to sign up for courses, and if the course is not full and they meet pre-requisites, the course is added to their schedule and the course will have them as a student in that course. Students can also drop courses. Students should be informed of the consequences such as change of status from full-time to part-time, loss of scholarships, and delays in graduation. Perform the following: 1. Create a use-case diagram for this university. Make your use-case diagram as complete as you can. 2. Pick two use cases from your use case diagram, CourseAdd and CourseDrop, and describe these use cases in the standard…arrow_forward
- Course Title: Object Oriented Analysis and Design Question : There is a utility company which provides waste management services to citizens. It has a CRM system, billing system, messaging system and mapping (GIS) system. When a customer is created in the CRM system, the billing, messaging, and GIS systems need a copy of customer data to perform follow-up tasks and automation. For instance—the billing system will create a billing account for the customer, the messaging system will send a welcome message with customer account details on preferred communication channel and the GIS system will update the customer’s address in the database for mapping purposes. After completion of one billing cycle the billing dept. sends a copy of the bill in a pdf format on the customer email address and the bill amount is directly debited from the customer’s bank account. Draw an appropriate Activity diagram . (Note): Forks and joins have the same notation: either a horizontal or vertical bar (the…arrow_forwardUML Class Diagram Modeling representation of messages and mailboxes in the email system that you use. Modeling task: object classes that might be used in the system implementation to represent a mailbox and an e-mail message. Include attributes, methods and relationships.arrow_forwardPlease draw a class diagram which reflects the following information: A student can be undergraduate or a graduate student. An undergraduate student can be a type of tutor. A tutor tutors a student. A teacher and a professor are two types of instructors. A teacher assistant can assist a teacher and a professor, but a teacher can be assisted by only one assistant, while a professor can be assisted by up to five assistants. A teacher assistant is a type of graduate student.arrow_forward
- In a university there are different classrooms, offices and departments. A department has a name and it contains many offices. A person working at the university has a unique ID and can be a professor or an employee. "A professor can be a full, associate or assistant professor and he/she is enrolled in one department. •Offices and classrooms have a number ID, and a classroom has a number of seats. • Every employee works in an office. 1. Draw the class diagram for the scenario abovearrow_forwardEntity Relationship Diagram (ERD) A salesperson may manage many other salespeople. A salesperson is managed by only one salespeople. A salesperson can be an agent for many customers. A customer is managed by one salespeople. A customer can place many orders. An order can be placed by one customer. An order lists many inventory items. An inventory item may be listed on many orders. An inventory item is assembled from many parts. A part may be assembled into many inventory items. Many employees assemble an inventory item from many parts. A supplier supplies many parts. A part may be supplied by many suppliers.arrow_forwardSCENARIO A manufacturing company produce equipment and sell them. The company needs a system to manage stock operations. It is explained below. Equipments are manufactured by using parts. Name, manufacturing date, current status of manufacturing must be known. Some of the equipments must be tested. We want to define all parts with their name, description and type. Only the defined parts can be bought. Once parts are bought, they are located into shelves in warehouses. Each physical part uniquely identified with number. We want to know when each part is bought. Each bought part may have different warranty period. We have to use the bought part in manufacturing by taking this into account. Warehouses are located in different part of the company. Size, type of the warehouses may be different. Equipments are manufactured for customers. It is needed to know the equipments of customers. Some of the customers pay the transportation cost. Name, address, tax number type of the customer will…arrow_forward
- Draw a UML class diagram for "clothing and other item donations" people can list the items available to donate. And people in need can request what items they need. please help, thank you.arrow_forwardDraw an activity diagram Student Assistance Fund (SAF) authorization has a number of steps in its approval process. A SAF authorization form is used in most universities to approve funding for students to aid their studies. Suppose a student fills out a blank form and sends it to his or her departmental chairperson for a signature. If the amount of funds requested by the student is small (under Tk. 10,000), then the chairperson signs the form and routes it to accounts payable to be input into the accounting system. The system cuts a check that is sent to the student for the right amount, and after the check is cashed, the form is filed away with the canceled check. If the check is not cashed within 30 days, the form expires. When the amount of the requested fund is large (over Tk. 10,000), the chairperson signs the form and sends it to the chief financial officer along with a paragraph explaining the reason for the grant, and the chief financial officer will sign the form and pass it…arrow_forwardCreate a UML class diagram using arrows to show the relationships between classes for the following scenario. The class diagram is attached for reference. A parking deck system manages an entry/exit gate, which opens to let a vehicle (i.e., car) into or out of the deck and closes when the car has passed through. A driver must push a button to print a parking permit. When the driver takes the parking permit, the system raises the gate. The system lowers the gate after the vehicle has passed through. A permit id and time of entry is printed on the parking permit, and is also encoded on the permit’s bar code. When the vehicle leaves the parking deck, the driver inserts the parking permit into a bar code reader, which scans the bar code, and then transmits the bar code to the parking system. The parking system calculates a fee that is based on the number of hours that have elapsed since the vehicle entered the parking deck, and displays the fee to the operator and driver. The driver must…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
C++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology Ptr
C++ for Engineers and Scientists
Computer Science
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Course Technology Ptr
6 Stages of UI Design; Author: DesignerUp;https://www.youtube.com/watch?v=_6Tl2_eM0DE;License: Standard Youtube License