Homework SourseRetailItemjava Write a class named RetailItem that reads da
RetailItem.java
- Write a class named RetailItem that reads data from an input file about an item in a retail store.
- The class should have the following fields: description (String), unitsOnHand (int), price (double).
- Write a constructor that accepts arguments for each field
- Write mutators & accessors that return thte values in these fields.
- Add a static constant attribute called DISCOUNT and set it to 20% or (0.20) to the RetailItem class.
- Include a applyDiscount() method - Computes the new price of an item using the constant as above
- Include a toString() to the RetailItem class - Displays the description, unitsOnHand, and Price.
RetailItemDriver.java
- Declare 3 retail items as follows: (Item#1: Jacket, 12 on hand, price $59.95), (Item#2: Jeans, 40 on hand, price $34.95), (Item#3: Shirt, 20 on hand, price $24.95).
- Create a method to read data for the 3 objects and create the objects (from a data file), create objects one at a time and return the object reference.
- Write a method named display() - displays one object at a time & displays the current state of the object. Include the display of the new price of the item after the discount is applied using method applyDiscount() for this.
- Write a method named displayAll() - displays all RetailItem objects, one at a time.
Solution
Hi FRiend, Please find my implementation.
You have not mentioned the structure of data in file. So i implemented to take input from console.
######### RetailItem.java ###########
public class RetailItem {
// instance variable
private String description;
private int unitsOnHand;
private double price;
private static double DISCOUNT = 0.20;
// constructor
public RetailItem(String description, int unitsOnHand, double price) {
this.description = description;
this.unitsOnHand = unitsOnHand;
this.price = price;
}
// GETTERS AND SETTERS
public String getDescription() {
return description;
}
public int getUnitsOnHand() {
return unitsOnHand;
}
public double getPrice() {
return price;
}
public void setDescription(String description) {
this.description = description;
}
public void setUnitsOnHand(int unitsOnHand) {
this.unitsOnHand = unitsOnHand;
}
public void setPrice(double price) {
this.price = price;
}
public void applyDiscount(){
price = price - price*DISCOUNT;
}
@Override
public String toString() {
return description+\", \"+unitsOnHand+\" on hand, price $\"+price;
}
}
########## RetailItemDriver.java ############
import java.util.Scanner;
public class RetailItemDriver {
private static Scanner sc = new Scanner(System.in);
public static void display(RetailItem item){
System.out.println(item);
System.out.println(\"After applying discount: \");
item.applyDiscount();
System.out.println(item);
}
public static void displayAll(RetailItem[] items){
for(RetailItem item: items)
System.out.println(item);
}
public static RetailItem getRetailObject(){
System.out.print(\"Enter description: \");
String des = sc.next();
System.out.print(\"Enter number of units: \");
int unit = sc.nextInt();
System.out.print(\"Enter price:\");
double price = sc.nextDouble();
//returning RetailItem object
return new RetailItem(des, unit, price);
}
public static void main(String[] args) {
// Declaring 3 RetailItem Object
RetailItem retail1 = new RetailItem(\"Item#1: Jacket\", 12, 59.9);
RetailItem retail2 = new RetailItem(\"Item#2: Jeans\", 40, 34.95);
RetailItem retail3 = new RetailItem(\"Item#3: Shirt\", 20, 24.95);
RetailItem[] retails = new RetailItem[3]; // creating an array of RetailItem Object
for(int i=0; i<3; i++){
System.out.println(\"Enter Item #\"+(i+1)+\" details\");
retails[i] = getRetailObject();
}
display(retails[2]);
displayAll(retails);
}
}
/*
Sample run:
Enter Item #1 details
Enter description: Jacket
Enter number of units: 12
Enter price:59.9
Enter Item #2 details
Enter description: Jeans
Enter number of units: 40
Enter price:34.95
Enter Item #3 details
Enter description: Shirt
Enter number of units: 20
Enter price:24.95
Shirt, 20 on hand, price $24.95
After applying discount:
Shirt, 20 on hand, price $19.96
Jacket, 12 on hand, price $59.9
Jeans, 40 on hand, price $34.95
Shirt, 20 on hand, price $19.96
*/
