Item List CSIS-1410 One of the main purposes of this assignment is to review and
ID: 3883190 • Letter: I
Question
Item List CSIS-1410 One of the main purposes of this assignment is to review and refresh many of the concepts covered in CSIS-1400. It also is an opportunity to demonstrate that you understood how to use doc comments and how to create jar files. Learning Objectives : Design and implement a class access class members of another class use an ArrayList use a static field use doc comments to provide useful documentation for your code read user input from keyboard provide user choices with a menu use repetition statements use selection statements override toString create a jar file that includes the Java source code Description: In this assignment I encourage you to work with a partner so you can help each other refresh concepts that have been covered in CSIS-1400. It is important to be responsive and that each partner contributes his/her fair share. If you have concerns about your partner bring it up as early as possible. First try to resolve the issue with your partner. If that is difficult talk to your instructure. Each code file should include a comment on top that lists both students and the name of the assignment. Together write a program that keeps track of a list of items and that provides the user with a menu that allows the user to add, remove, list items, etc. For more details read the instructions below. Instructions: Decide which items you would like to store in the list. (e.g. books, bikes, gemstones, etc.) It can by any thing but not cars (I used that for the example) and not people. Create a class that represents the item you chose. Here are some requirements your class needs to fulfill: It can not be cars or people (see above) The class needs to have at least 3 attributes you are keeping track of (e.g. year, make, model) It needs to have two additional fields: o a unique id that cannot be changed once created (like a primary key in a database) o a static count that is used to initialize the id with a unique number Notice: At this point, we have a total of at least 5 attributes It needs a parameterized constructor. It allows the user to provide values for all the attributes you are keeping track of but not for the id nor for the count. (in our case that would be 3 parameters: year, make, and model) The constructor creates a unique id – e.g. an 8 digit number for each item based on the static field count. (e.g. 12345678 + count++; In this example the smallest id would be 12345678) It needs a getter for each of the fields except for the static count (in our case that would be 4 getters) The static count should not be exposed to another class. It is only used to initialize the unique id in the constructor. Hint: http://stackoverflow.com/questions/7221691/is-there-a-way-to-automatically-generate-getters-and-setters-in-eclipse It needs to override the method toString. The method toString has no parameters and returns a string that represents an instance of the class. This string needs to include the values of all fields except for count (e.g. 2015 Honda Accord id: 12345679 ) Labels should be added when the value itself is not self-explanatory. (e.g. id) Sample Output : 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 1 2011 Toyota Corolla id:12345678 2015 Honda Accord id:12345679 2008 Audi A4 id:12345680 2017 Tesla Model 3 id:12345681 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 5 Number of cars: 4 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 3 Id: 12345680 2008 Audi A4 id:12345680 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 4 Id: 12345680 2008 Audi A4 has been deleted 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 2 Year: 2013 Make: Ford Model: Mustang Instructions continued: At this point you have one class that represents one item (e.g. Book, Bike, Gemstone, etc.). This class does not contain the list of items nor should it include any print statements. You still need at least one more class (optionally two) that include(s) the list of items, the menu with options, and the user communication (input / output) Create one or two additional classes to do the following: Declare an ArrayList of items ( each element in the list should be an instance of the new Java type you just wrote) Initialize the list with four different elements (hard coded). Display a menu with the following choices until the user chooses to exit: 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: Important: replace the word item and items with the actual type you store in the list. (e.g. Display all cars) Provide the functionality chosen by the user. Use private methods to print the menu and to display, find, add, or delete items. Using private methods in such a way structures the code and to makes the code more clear and easier to read. When the user wants to find or delete an item s/he should be prompted for the id number. If the user provides and id number that doesn’t exist, an appropriate message should be displayed. (e.g. The id … could not be found.) If the id number could be found the item information should be displayed as part of the response (e.g. 2015 Honda Accord id:12345679 if the item was found or 2015 Honda Accord has been deleted if it was deleted) If the user enters an invalid choice from the menu (e.g. 9) an appropriate message should be printed (e.g. Enter a selection 1 - 6) If the user enters 6 a message should be printed before terminating the program (e.g. Good bye) Below you can find a sample output. This sample is about cars. Your output needs show elements of the item type you chose above. 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 1 2011 Toyota Corolla id:12345678 2015 Honda Accord id:12345679 2017 Tesla Model 3 id:12345681 2013 Ford Mustang id:12345682 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 4 Id: 12345680 The id 12345680 could not be found 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 4 Id: 12345682 2013 Ford Mustang has been deleted 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 5 Number of cars: 3 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 7 Enter a selection 1 - 6 1. Display all items 2. Add an item 3. Find an item 4. Delete an item 5. Number of items in list 6. Exit Enter your selection: 6 Good bye Javadoc: Ensure that you have a doc comment above each of the classes, fields, and methods Jar file: Create a jar file that includes the source code. It is optional but not required to make it runnable as well. Video: Create a screen recording in one of the following formats: mp4, swf, or WebM If you have already a software that you like to use for screen casts that’s great. If not you can check out https://screencast-omatic.com/screen_recorder. It is free and easy to use. The recording should be no more than 5 minutes long and it should include the following: Your names (both partners) When you start recording Eclipse should already be open and the windows should be adjusted so that the code can be easily seen. Show all the code by slowly scrolling down the classes from top to bottom. If you have any missing parts or known errors in your code it should be pointed out here. Apart from that no explanation is needed. I will pause the video whenever I need a closer look. Run the code and demonstrate the functionality as shown in the sample output on the left. Make sure all options from the menu are used. Briefly reflect on the experience. Was there a difficulty you were able to overcome? What did you learn from this experience? Briefly describe the “pebble distribution”. Assume your team has 100 pebbles. They represent 100% of the work done. If both partners worked well together, were responsive, contributed their fair share etc. then the pebble distribution should be 50 / 50. However, sometimes the team work is less balanced. In either case discuss the pebbles distribution with your partner before submitting it. Turning in : ONE student submits the jar file AND the video The other student writes a brief submission note listing the name of the partner
How do you do this?
Explanation / Answer
Given below are the classes needed for question. Output is also shown at end. Hope it helps. If it does, please don't forget to rate the answer. Thank you very much.
Book.java
public class Book {
private String author;
private String title;
private int pages;
private int id;
private static int count = 10000000;
public Book(String auth, String titl, int pag) {
id = ++ count;
author = auth;
title = titl;
pages = pag;
}
public int getId()
{
return id;
}
public String getAuthor() {
return author;
}
public String getTitle() {
return title;
}
public int getPages() {
return pages;
}
public void setAuthor(String author) {
this.author = author;
}
public void setTitle(String title) {
this.title = title;
}
public void setPages(int pages) {
this.pages = pages;
}
@Override
public String toString() {
return "Book [id=" + id + ", author=" + author + ", title=" + title + ", pages=" + pages + "]";
}
}
Library.java
import java.util.ArrayList;
public class Library {
private ArrayList<Book> books;
public Library()
{
books = new ArrayList<Book>();
}
public void addBook(Book b)
{
books.add(b);
}
public Book deleteBook(int id)
{
for(int i = 0; i < books.size(); i++)
{
if(books.get(i).getId() == id)
{
return books.remove(i);
}
}
return null; //when not found
}
public int getNumBooks()
{
return books.size();
}
public Book findBook(int id)
{
for(int i = 0; i < books.size(); i++)
{
if(books.get(i).getId() == id)
{
return books.get(i);
}
}
return null; //when not found
}
public void displayBooks()
{
for(Book b : books)
System.out.println(b);
}
}
LibraryDriver.java
import java.util.Scanner;
public class LibraryDriver {
private Scanner keybd = new Scanner(System.in);
public static void main(String[] args) {
LibraryDriver driver = new LibraryDriver();
driver.menu();
System.out.println("Good Bye");
}
private void menu()
{
int choice = 0;
Library lib = new Library();
Book b;
int id;
//initially add 4 books
lib.addBook(new Book("Ronald Rivest", "Introduction to Algorithms", 1300));
lib.addBook(new Book("Herbert Schildt", "Java The Complete Reference, Seventh Edition", 900 ));
lib.addBook(new Book("Jeffrey Ullman", "Database Systems", 760));
lib.addBook(new Book("Bjarne Stroustrup", "The C++ Programming Language", 800));
while(choice != 6)
{
System.out.println("1. Display all books");
System.out.println("2. Add a book");
System.out.println("3. Find a book");
System.out.println("4. Delete a book");
System.out.println("5. Number of books");
System.out.println("6. Exit");
System.out.print("Enter selection: ");
choice = keybd.nextInt();
keybd.nextLine(); //remove newline
switch(choice)
{
case 1: lib.displayBooks();
break;
case 2:
b = inputBookDetails();
lib.addBook(b);
System.out.println("Book added with id = " + b.getId());
break;
case 3:
System.out.print("Enter book id to find: ");
id = keybd.nextInt();
b = lib.findBook(id);
if(b == null)
System.out.println("No book with id = " +id);
else
System.out.println("Found " + b);
break;
case 4:
System.out.print("Enter book id to find: ");
id = keybd.nextInt();
b = lib.deleteBook(id);
if(b == null)
System.out.println("No book with id = " +id);
else
System.out.println("Deleted " + b);
break;
case 5:
System.out.println("No. of books = " + lib.getNumBooks());
break;
case 6:
break;
default:
System.out.println("Invalid menu choice!");
}
}
}
public Book inputBookDetails()
{
String auth, title;
int pages;
System.out.print("Author: ");
auth = keybd.nextLine().trim();
System.out.print("Title: ");
title = keybd.nextLine().trim();
System.out.print("No. of Pages: ");
pages = keybd.nextInt();
return new Book(auth, title, pages);
}
}
output
1. Display all books
2. Add a book
3. Find a book
4. Delete a book
5. Number of books
6. Exit
Enter selection: 1
Book [id=10000001, author=Ronald Rivest, title=Introduction to Algorithms, pages=1300]
Book [id=10000002, author=Herbert Schildt, title=Java The Complete Reference, Seventh Edition, pages=900]
Book [id=10000003, author=Jeffrey Ullman, title=Database Systems, pages=760]
Book [id=10000004, author=Bjarne Stroustrup, title=The C++ Programming Language, pages=800]
1. Display all books
2. Add a book
3. Find a book
4. Delete a book
5. Number of books
6. Exit
Enter selection: 2
Author: Jonathan Knudsen
Title: Learning Java
No. of Pages: 500
Book added with id = 10000005
1. Display all books
2. Add a book
3. Find a book
4. Delete a book
5. Number of books
6. Exit
Enter selection: 1
Book [id=10000001, author=Ronald Rivest, title=Introduction to Algorithms, pages=1300]
Book [id=10000002, author=Herbert Schildt, title=Java The Complete Reference, Seventh Edition, pages=900]
Book [id=10000003, author=Jeffrey Ullman, title=Database Systems, pages=760]
Book [id=10000004, author=Bjarne Stroustrup, title=The C++ Programming Language, pages=800]
Book [id=10000005, author=Jonathan Knudsen, title=Learning Java, pages=500]
1. Display all books
2. Add a book
3. Find a book
4. Delete a book
5. Number of books
6. Exit
Enter selection: 3
Enter book id to find: 1000007
No book with id = 1000007
1. Display all books
2. Add a book
3. Find a book
4. Delete a book
5. Number of books
6. Exit
Enter selection: 3
Enter book id to find: 10000003
Found Book [id=10000003, author=Jeffrey Ullman, title=Database Systems, pages=760]
1. Display all books
2. Add a book
3. Find a book
4. Delete a book
5. Number of books
6. Exit
Enter selection: 4
Enter book id to find: 1000009
No book with id = 1000009
1. Display all books
2. Add a book
3. Find a book
4. Delete a book
5. Number of books
6. Exit
Enter selection: 4
Enter book id to find: 10000004
Deleted Book [id=10000004, author=Bjarne Stroustrup, title=The C++ Programming Language, pages=800]
1. Display all books
2. Add a book
3. Find a book
4. Delete a book
5. Number of books
6. Exit
Enter selection: 5
No. of books = 4
1. Display all books
2. Add a book
3. Find a book
4. Delete a book
5. Number of books
6. Exit
Enter selection: 6
Good Bye
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