/********************************************************
Program File: SalesAnalytics.java
Programmer: Gao Jia Hong (230332107)
Programme: IT114103
Description: This program is Tracking Sales and Revenue for a Retail Store
********************************************************/
import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;
public class SalesAnalytics {
public static void main(String[] args) {
// Read sales data from file
List<Sale> sales = readSalesDataFromFile("salesdata.txt");
// Calculate total revenue
double totalRevenue = calculateTotalRevenue(sales);
System.out.printf("Total Revenue: $%.2f%n", totalRevenue);
// Find and display the top-selling product(s)
List<Sale> topSellingProducts = findTopSellingProducts(sales);
System.out.print("Top-Selling Product(s):");
for (Sale sale : topSellingProducts) {
System.out.printf("%s (Quantity: %d)%n", sale.getProductName(), sale.getQuantitySold());
}
// Calculate and display the average sale price
double averageSalePrice = calculateAverageSalePrice(sales);
System.out.printf("Average Sale Price: $%.2f%n", averageSalePrice);
// Find and display the product with the highest sale price
Sale highestSalePriceProduct = findProductWithHighestSalePrice(sales);
System.out.println("Product with Highest Sale Price: " + highestSalePriceProduct.getProductName());
// Find and display the product with the lowest sale price
Sale lowestSalePriceProduct = findProductWithLowestSalePrice(sales);
System.out.println("Product with Lowest Sale Price: " + lowestSalePriceProduct.getProductName());
// Generate sales chart
generateSalesChart(sales);
}
// Method to read sales data from file
private static List<Sale> readSalesDataFromFile(String fileName) {
List<Sale> sales = new ArrayList<>();
try {
File file = new File(fileName);
Scanner scanner = new Scanner(file);
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
String[] data = line.split(", ");
String productName = data[0];
int quantitySold = Integer.parseInt(data[1]);
double salePrice = Double.parseDouble(data[2]);
Sale sale = new Sale(productName, quantitySold, salePrice);
sales.add(sale);
}
scanner.close();
} catch (FileNotFoundException e) {
System.out.println("File not found.");
}
return sales;
}
// Method to calculate total revenue
private static double calculateTotalRevenue(List<Sale> sales) {
double totalRevenue = 0;
for (Sale sale : sales) {
totalRevenue += sale.getQuantitySold() * sale.getSalePrice();
}
return totalRevenue;
}
// Method to find the top-selling product(s)
private static List<Sale> findTopSellingProducts(List<Sale> sales) {
List<Sale> topSellingProducts = new ArrayList<>();
int maxQuantitySold = 0;
for (Sale sale : sales) {
if (sale.getQuantitySold() > maxQuantitySold) {
maxQuantitySold = sale.getQuantitySold();
}
}
for (Sale sale : sales) {
if (sale.getQuantitySold() == maxQuantitySold) {
topSellingProducts.add(sale);
}
}
return topSellingProducts;
}
// Method to calculate the average sale price
private static double calculateAverageSalePrice(List<Sale> sales) {
double totalSalePrice = 0;
for (Sale sale : sales) {
totalSalePrice += sale.getSalePrice();
}
return totalSalePrice / sales.size();
}
// Method to find the product with the highest sale price
private static Sale findProductWithHighestSalePrice(List<Sale> sales) {
Sale highestSalePriceProduct = sales.get(0);
for (Sale sale : sales) {
if (sale.getSalePrice() > highestSalePriceProduct.getSalePrice()) {
highestSalePriceProduct = sale;
}
}
return highestSalePriceProduct;
}
// Method to find the product with the lowest sale price
private static Sale findProductWithLowestSalePrice(List<Sale> sales) {
Sale lowestSalePriceProduct = sales.get(0);
for (Sale sale : sales) {
if (sale.getSalePrice() < lowestSalePriceProduct.getSalePrice()) {
lowestSalePriceProduct = sale;
}
}
return lowestSalePriceProduct;
}
// Method to generate the sales chart
private static void generateSalesChart(List<Sale> sales) {
System.out.println("\nSales Chart:");
for (Sale sale : sales) {
System.out.println("\n" + sale.getProductName() + ": ");
for (int i = 0; i < sale.getQuantitySold(); i++) {
System.out.print("*");
}
}
}
}
class Sale {
private String productName;
private int quantitySold;
private double salePrice;
public Sale(String productName, int quantitySold, double salePrice) {
this.productName = productName;
this.quantitySold = quantitySold;
this.salePrice = salePrice;
}
public String getProductName() {
return productName;
}
public int getQuantitySold() {
return quantitySold;
}
public double getSalePrice() {
return salePrice;
}
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short x = 999; // -32768 to 32767
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Switch is an alternative to If-Else-If ladder and to select one among many blocks of code.
switch(<conditional-expression>) {
case value1:
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break; // optional
case value2:
// code
break; // optional
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For loop is used to iterate a set of statements based on a condition. Usually for loop is preferred when number of iterations is known in advance.
for(Initialization; Condition; Increment/decrement){
//code
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While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(<condition>){
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Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
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} while (<condition>);
Class is the blueprint of an object, which is also referred as user-defined data type with variables and functions. Object is a basic unit in OOP, and is an instance of the class.
class keyword is required to create a class.
class Mobile {
public: // access specifier which specifies that accessibility of class members
string name; // string variable (attribute)
int price; // int variable (attribute)
};
Mobile m1 = new Mobile();
public class Greeting {
static void hello() {
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}
public static void main(String[] args) {
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}
Collection is a group of objects which can be represented as a single unit. Collections are introduced to bring a unified common interface to all the objects.
Collection Framework was introduced since JDK 1.2 which is used to represent and manage Collections and it contains:
This framework also defines map interfaces and several classes in addition to Collections.
| Collection | Description |
|---|---|
| Set | Set is a collection of elements which can not contain duplicate values. Set is implemented in HashSets, LinkedHashSets, TreeSet etc |
| List | List is a ordered collection of elements which can have duplicates. Lists are classified into ArrayList, LinkedList, Vectors |
| Queue | FIFO approach, while instantiating Queue interface you can either choose LinkedList or PriorityQueue. |
| Deque | Deque(Double Ended Queue) is used to add or remove elements from both the ends of the Queue(both head and tail) |
| Map | Map contains key-values pairs which don't have any duplicates. Map is implemented in HashMap, TreeMap etc. |