Concept explainers
Open the products project and complete the StockManager class through this and the next few exercises. StockManager uses an ArrayList to store Product tems. Its addProduct method already adds a product to the collection, but the following methods need completing: delivery, findProduct, printProductDetaiIs, and numberInStock.
Each product sold by the company is represented by an instance of the Product class, which records a product's ID, name, and how many of that product are currently In stock. The Product class defines the increaseQuantity method to record increases in the stock level of that product. The sell One method records that one Item of that product has been sold, by reducing the quantity field level by 1. Product has been provided for you, and you should not need to make any alterations to it.
Start by implementing the printProductDetai1s method to ensure that you are able to iterate over the collection of products. Just print out the details of each Product returned, by calling its toString method.
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
Additional Engineering Textbook Solutions
C How to Program (8th Edition)
Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
Concepts of Programming Languages (11th Edition)
Starting Out With Visual Basic (7th Edition)
Starting Out with Java: From Control Structures through Data Structures (3rd Edition)
Database Concepts (7th Edition)
- Are there obvious improvements that could be made here with respect the software design for Squares and Circles? What programming constructs were you familiar with, and which did you need to look up? Assume we used a separate array for Squares and for Circles rather than one unifying Object array. How would this complicate the task of adding a new Shape (say, a Triangle) to our ObjectList class?arrow_forwardWrite a class Employee with name and salary. Create an ArrayList that sorts the Employees based on salary.arrow_forward1) Create a "Car" class that keeps car ids and prices. And create a "Galleries" class that holds the car list for a particular gallery. In this class there should be methods for get / set and print for car name, car number and car list. Adding / Removing Cars to the List in This Class should have methods. And create another method to find and print the IDs of Cars with Car Segment equal to X. (print (X)). Car Prices are as follows according to the segments. 0-19999 -> Z20000-29999 -> Y30000-44999 -> T45000-100000 -> P Apply the Car list using "Single Linked List"(Node, newNode, head). The program should be written in JAVA.arrow_forward
- Exercise #2 Implement an instance method belonging to the IntArrayBag class that takes two input parameters, oldVal and newVal. The method replaces each oldVal element in the array with newVal. Make sure to include the method header.arrow_forwardA supermarket wants to reward its best customer of each day, showing the customer’s name on a screen in the supermarket. For that purpose, the store keeps an ArrayList.Create a class customer having id, name, gender, and bill provide appropriate getters/setters and constructors also provide toString method.In the Store class, make an ArrayList of customers, store name, and address implement methods public void addSale(Customer c) that will add customers to the arraylist.public void RemoveCustomer(int id);public void UpdateCustomerRecord(int Id);public displayAll();public String nameOfBestCustomer() to record the sale and return the name of the customer with the largest sale. public ArrayList nameOfBestCustomers(int topN) so that it displays the top customers, that is, the topN customers with the largest sales, where topN is a value that the user of the program supplies. Write a program that prompts following menu and ============================================…arrow_forwardFor the first part of this lab, copy your working ArrayStringList code into the GenericArrayList class.(already in the code) Then, modify the class so that it can store any type someone asks for, instead of only Strings. You shouldn't have to change any of the actual logic in your class to accomplish this, only type declarations (i.e. the types of parameters, return types, etc.) Note: In doing so, you may end up needing to write something like this (where T is a generic type): T[] newData = new T[capacity]; ...and you will find this causes a compiler error. This is because Java dislikes creating new objects of a generic type. In order to get around this error, you can write the line like this instead: T[] new Data = (T[]) new Object[capacity] This creates an array of regular Objects which are then cast to the generic type. It works and it doesn't anger the Java compiler. How amazing! Once you're done, screenshot or save your code for checkin later. For the second part of the lab,…arrow_forward
- Implement solutions for the following methods: • getCourseSize() – returns the number of students registered in the course (not in the waitlist). It should maintain the public size variable that keeps track of the number of students registered. • getRegisteredIDs() – returns an array of int[], namely registered student id’s. The length of the array is the size (number of students) in the course. • getRegisteredStudents() – returns an array of type Student[], namely the registered Students. The length of the array is the current size (number of students) of the course. • getWaitlistedIDs() – returns an array of type int[], namely the ids of students in the waitlist. • getWaitlistedStudents() – returns an array of Students in the waitlist. public class Course { public String code; public int capacity; public SLinkedList<Student>[] studentTable; public int size; public SLinkedList<Student> waitlist; public Course(String code) {…arrow_forwardImport the ArrayList and List classes from the java.util package to create a list of phone numbers and also import the HashSet and Set classes from the java.util package to create a set of unique prefixes. Create a class called PhoneNumberPrefix with a main method that will contain the code to find the unique prefixes. Create a List called phoneNumbers and use the add method to add several phone numbers to the list. List<String> phoneNumbers = new ArrayList<>(); phoneNumbers.add("555-555-1234"); phoneNumbers.add("555-555-2345"); phoneNumbers.add("555-555-3456"); phoneNumbers.add("444-444-1234"); phoneNumbers.add("333-333-1234"); Create a Set called prefixes and use a for-each loop to iterate over the phoneNumbers list. For each phone number, we use the substring method to extract the first 7 characters, which represent the prefix, and add it to the prefixes set using the add method. Finally, use the println method to print the prefixes set, which will contain all of…arrow_forwardAdd a method to the Parking Office to return the collection of permit ids for a specific customer (getPermitIds(Customer)) I have already coded the permit id class, but I attached the class diagram for you to see. Current Java Code: package parkingsystem4;import java.util.LinkedList;import java.util.List; public class ParkingOffice { String name; String address; List<Car> cars = new LinkedList<Car>(); List<Customer> customers = new LinkedList<Customer>(); List<ParkingLot> lots = new LinkedList<ParkingLot>(); List<ParkingCharge> charges = new LinkedList<ParkingCharge>(); // Default constructor ParkingOffice(){ } // Parameterized constructor ParkingOffice(String name, String address, List<Car> parkedCars, List<ParkingLot> lots, List<ParkingCharge> charges){ this.name = name; this.address = address; this.cars = parkedCars; this.lots = lots;…arrow_forward
- In java A supermarket wants to reward its best customer of each day, showing the customer’s name on a screen in the supermarket. For that purpose, the store keeps an ArrayList.Create a class customer having id, name, gender, and bill provide appropriate getters/setters and constructors also provide toString method.In the Store class, make an ArrayList of customers, store name, and address implement methods public void addSale(Customer c) that will add customers to the arraylist.public void RemoveCustomer(int id);public void UpdateCustomerRecord(int Id);public displayAll();public String nameOfBestCustomer() to record the sale and return the name of the customer with the largest sale. public ArrayList nameOfBestCustomers(int topN) so that it displays the top customers, that is, the topN customers with the largest sales, where topN is a value that the user of the program supplies. Write a program that prompts following menu and ============================================…arrow_forwardImplement the design of the ECustomer class so that the following output is produced:[Your code should work for any number of products added in the setProductDetails method]# Write your codes here.print("Total E-Customer:", ECustomer.count)c1 = ECustomer("James")c1.setProductDetails("TV",35000,"Air Cooler", 9000)c2 = ECustomer("Mike")c2.setProductDetails("Mobile",20000,"Headphone",1200,"Fridge", 45000)c3 = ECustomer("Sarah")c3.setProductDetails("Headphone", 1200)print("=========================")c1.printDetail()print("=========================")c2.printDetail()print("=========================")c3.printDetail()print("=========================")print("Total E-Customer:", ECustomer.count)Output:Total E-Customer: 0=========================Name: JamesProducts: TV, Air CoolerTotal cost: 44000=========================Name: MikeProducts: Mobile, Headphone, FridgeTotal cost: 66200=========================Name: SarahProducts: HeadphoneTotal cost: 1200=========================Total E-Customer:…arrow_forwardAdd a getUnsold method to the Auction class with the -following header: public ArrayList getUnsold() This method should iterate over the lots field, storing unsold lots in a new ArrayList local variable. What you are looking for is Lot objects whose highestBid field is null. At the end of the method, return the list of unsold lots.arrow_forward
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill EducationStarting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSONDigital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
- C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSONDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningProgrammable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education