Description
Part I)
A book object has four attributes, a title (String), an author (String), an ISBN (long), and a price
(double).
For this part, you are required to design and implement the Book class according to the
following specifications:
– Upon the creation of a book object, the object must immediately be initialized with valid
values; that is title, author, ISBN and price. (Hint: Constructors.)
– The design should allow enough flexibility so that the value of any of these attributes can
be modified later on. For example, it should be possible to create a book object with a
given price then change its price later on. The design should also allow the user to obtain
the value of any of the attributes.
(Hint: Accessors & Mutators.)
What do you want to do?
1. Enter new books (password required)
2. Change information of a book (password required)
3. Display all books by a specific author
4. Display all books under a certain a price.
5. Quit
Please enter your choice >
– The design should allow all information of an object to be displayed at once through the
utilization of System.out.print() method. (Hint: toString() method)
– It is required to know how many Book objects have been created. For that, you need to
add a method, called findNumberOfCreatedBooks(), to the class. This method must
return the number of created Book objects prior to the time this method is called. The
method would simply return 0 if no books has been created by the time the method is
called. (Hint: Static – You are allowed to add other attributes to the class.)
– It is required to compare two Book objects for equality. Two Book objects are considered
equal if they have the same ISBN and price. (Hint: equals() method)
– It is required to display any Book object (all info of that object) using
System.out.println() method. (Hint: toSting() method)
Part II)
You are hired by a bookstore to write a software that helps the store owner in keeping track of the books
at the store. Write a driver program that will contain, at least, the following methods. Note: You can have
the main function in a separate driver file, or in the same file if you prefer.
1. a main() method, that will:
a. Display a welcome message
b. Prompt the bookstore owner for the maximum number of books (maxBooks) his/her
bookstore can contain. Create an empty array, called inventory, that will have the potential
of keeping track of the created Book objects.
c. Display a main menu (fig 1) with the following choices and keep prompting the user until
they enter a number between 1 and 5 inclusive:
d. When option 1 is entered:
i. Prompt the bookstore owner for his/her password. (Make sure you have a constant
variable containing the password “password” – do not use any other password as it will
be easier for the marker to check your assignments). The bookstore owner has a
maximum of 3 attempts to enter the correct password. After the 3rd illegal entry, the main
menu in figure 1 is re-displayed again. Additionally after this process is repeated 4 times
(i.e. total failed attemopts is 12 by now), the program must displays the following
messages: “Program detected suspicous activities and will terminate immediately!”, then
the program must exits.
Fig 1. Main menu
ii. If the correct password is entered, ask the owner how many books s/he wants to enter.
Check to make sure that there is enough space in the bookstore (array of Book) to add
that many books. If so, add them; otherwise inform the owner that he/she can only add the
number of remaining places in the array. (How the book information will be input/entered
by the user, is up to you).
e. When option 2 is entered :
i. Prompt the bookstore owner for his/her password. (Make sure you have a constant
containing the password “password” as a constant – do not use another password).
Again the bookstore owner has 3 attempts to enter the correct password. However,
after the 3rd illegal entry, the main menu in figure 1 is simply re-displayed again
(notice the different behaviour in that case from the previous one above).
ii. Ask the user which book number s/he wishes to update. The book number is the
index in the array inventory. If there is no Book object at the specified index
location, display a message asking the user if he/she wishes to re-enter another
book, or quit this operation and go back to the main menu. If the entered index has
a valid book, display the current information of that book in the following format:
Book # X
Author: name of author
Title: title of book
ISBN: isbn #
Price: $price
Then ask the user which attribute they wish to change by displaying the following
menu.
Once the user has entered a correct choice, make the changes to the attribute then display
again all of the attributes on the screen to show that the attribute has been changed. Keep
prompting the user for additional changes until the user enters 5. Each time the user is
prompted for a choice make sure that a number from 1 to 5 is entered, otherwise keep
prompting until a valid number is entered.
f. When option 3 (in the main menu shown in Fig. 1) is entered, prompt the user to enter an
author name. You then need to display the information of all books by that requested
author. (Hint: You may use a static method, for instance called findBooksBy , which
accepts a string for an author name then performs the needed search).
g. When option 4 (in the main menu shown in Fig. 1) is entered, promtp the user to enter a
value (representing a price). You them need to display all books that have a vlaue smaller
than that entered value. (Hint: You may use a static method, for instance called
What information would you like to
change?
1. author
2. title
3. ISBN
4. price
5. Quit
Enter your choice >
Fig 2. Update menu
findCheaperThan, which accepts a double value, for a price, then performs the needed
search).
h. When option 5 (in the main menu shown in Fig. 1) is entered, display a closing message
and end the driver.
Submitting Assignment 1
– For this assignment, you are allowed to work individually, or in a group of a maximum of 2
students (i.e. you and one other student). You and your teammate must however be in the same
section of the course. Groups of more than 2 students = zero mark for all members!
– Only electronic submissions will be accepted. Zip together the source codes. (Please use
WINZIP).
– Students will have to submit their assignments (one copy per group) using the Moodle/EAS
system (please check for your section submission). Assignments must be submitted in the right
DropBox/folder of the assignments. Assignments uploaded to an incorrect DropBox/folder
will not be marked and result in a zero mark. No resubmissions will be allowed. Your
instructor will indicate whether you should upload your assignment to EAS
(https://fis.encs.concordia.ca/eas/) or to Moodle.
– Naming convention for zip file: Create one zip file, containing all source files and produced
documentations for your assignment using the following naming convention:
The zip file should be called a#_StudentName_StudentID, where # is the number of the
assignment and StudentName/StudentID is your name and ID number respectively. Use
your “official” name only – no abbreviations or nick names; capitalize the usual “last”
name. Inappropriate submissions will be heavily penalized. For example, for the first
assignment, student 12345678 would submit a zip file named like: a1_MikeSimon_123456.zip. if working in a group, the name should look like: a1_MikeSimon_12345678-AND-Linda-Jackson_98765432.zip.
– Submit only ONE version of an assignment. If more than one version is submitted the first one
will be graded and all others will be disregarded.
– If working in a team, only one of the members can upload the assignment. Do NOT upload the
file for each of the members!
Evaluation Criteria for Assignment 1 (10 points)
Documentations 1 pts
javaDoc documentations 1 pt
Part I (Class Book3) 3 pts
Default & copy constructors 1 pt
Accessor/mutator method for static attribute 1 pt
equals, toString and static attributes/methods 2 pts
Part II (Driver & other static methods) 6 pts
Handling of password 1 pt
Handling of option 1 1 pt
Handling of option 2 1 pt
Handling of option 3 1 pt
Handling of option 4 1 pt
Handling of option 5 1 pt
