Answer to Question #237594 in Java | JSP | JSF for Dohc44

Question #237594
Extreme IT Products is a local supplier that specialises in the sales of the latest Information
Technology hardware devices. The business has recently opened an outlet in the town you reside
and has hired the software development house you work for to design a Java application to
manage their products.
Your line manager has requested you to develop the application with the following requirements:
Q.1.1 When the application starts, it must display the following menu structure:
1
Expert's answer
2021-09-15T07:54:22-0400
/*
Class for product details
*/
public class Product {
//variables
private String prodCode;
private String prodName;
private String category;
private String warranty;
private double price;
private int level;
private String supplier;

//constructor
public Product() {
this.warranty = "2 years"; // default warranty is 2 years
}

public String getProdCode() {
return prodCode;
}

public void setProdCode(String prodCode) {
this.prodCode = prodCode;
}

public String getProdName() {
return prodName;
}

public void setProdName(String prodName) {
this.prodName = prodName;
}

public String getCategory() {
return category;
}

public void setCategory(String category) {
this.category = category;
}

public String getWarranty() {
return warranty;
}

public void setWarranty(String warranty) {
if(warranty.equals("1"))
this.warranty = "6 months";
}

public double getPrice() {
return price;
}

public void setPrice(double price) {
this.price = price;
}

public int getLevel() {
return level;
}

public void setLevel(int level) {
this.level = level;
}

public String getSupplier() {
return supplier;
}

public void setSupplier(String supplier) {
this.supplier = supplier;
}

@Override
public String toString() {
return "PRODUCT CODE >> \t" + prodCode + "\nPRODUCT NAME >> \t" + prodName + "\nPRODUCT CATEGORY >> \t" + category + "\nPRODUCT WARRANTY >> \t"
+ warranty + "\nPRODUCT PRICE >> \t" + price + "\nPRODUCT LEVEL >> \t" + level + "\nPRODUCT SUPPLIER >> \t" + supplier ;
}
      
}



/*
* class for Report data
*/
import java.util.ArrayList;
import java.util.Scanner;

class ReportData {

// list of products
private ArrayList<Product> products ;
// array for categories
private String[] categories;

public ReportData() {
this.categories = new String[] {"Desktop Computer", "Laptop", "Tablet", "Printer", "Gaming console"};
products = new ArrayList<>();
}
  
//method to add a new product to list
void addProduct(Scanner in) {
System.out.println("CAPTURE A NEW PRODUCT");
System.out.println("**********************");
Product newProduct = new Product();
System.out.print("Enter the product code: ");
newProduct.setProdCode(in.nextLine());
System.out.print("Enter the product name: ");
newProduct.setProdName(in.nextLine());
System.out.println("Enter the product category: ");
int choice;
// loop for category selection
while (true) {
for (int i = 0; i < categories.length; i++) {
System.out.println(categories[i] + " - " + (i + 1));
}
System.out.print("Product category: ");
try{
choice = Integer.parseInt(in.nextLine());
if(choice>0 && choice<=categories.length)
break;
}
catch(NumberFormatException e){
System.out.println("Incorrect category selection..");
}
}
newProduct.setCategory(categories[choice-1]);
setWarranty(newProduct, in);
setPrice(newProduct, in);
setStockLevel(newProduct, in);
System.out.print("Enter supplier for "+newProduct.getProdName()+": ");
newProduct.setSupplier(in.nextLine());
products.add(newProduct);
System.out.println("Product details has been saved successfully!!!\n");
  
}

//method to set stock level of a product
private void setStockLevel(Product newProduct, Scanner in) throws NumberFormatException {
System.out.print("Enter stock level for "+newProduct.getProdName()+": ");
newProduct.setLevel(Integer.parseInt(in.nextLine()));
}

//method to set price of a product
private void setPrice(Product newProduct, Scanner in) throws NumberFormatException {
System.out.print("Enter price for "+newProduct.getProdName()+": ");
newProduct.setPrice(Double.parseDouble(in.nextLine()));
}

//method to set warranty of a product
private void setWarranty(Product newProduct, Scanner in) {
System.out.print("Indicate product warranty. Enter (1) for 6 months or any other keys for 2 years: ");
newProduct.setWarranty(in.nextLine());
}

// method to search a product in the products list
Product searchProduct(Scanner in) {
System.out.println("Please enter product code: ");
String prodCode = in.nextLine();
System.out.println("\nPRODUCT SEARCH RESULT");
System.out.println("***************************");
for(int i=0; i<products.size(); i++){
if(products.get(i).getProdCode().equals(prodCode)){
return products.get(i);
}
}
return null;
}

// method to update details of product
void update(Scanner in) {
Product p = searchProduct(in);
if(p!=null){
System.out.print("Update the warranty? (y)yes (n)no: ");
String choice = in.nextLine();
if(choice.equalsIgnoreCase("y")){
setWarranty(p, in);
}
System.out.print("Update the price? (y)yes (n)no: ");
choice = in.nextLine();
if(choice.equalsIgnoreCase("y")){
setPrice(p, in);
}
System.out.print("Update the stock level? (y)yes (n)no: ");
choice = in.nextLine();
if(choice.equalsIgnoreCase("y")){
setStockLevel(p, in);
}
System.out.println("The product details has been updated successfully!!!");
}
else{
System.out.println("The product canot be located. Invalid product.");
}
}

// method to delete a product
void delete(Scanner in) {
Product p = searchProduct(in);
if(p!=null){
System.out.print("Do you want to delete "+p.getProdCode()+"? (y)yes (n)no: ");
String choice = in.nextLine();
if(choice.equalsIgnoreCase("y")){
products.remove(p);
System.out.println(p.getProdCode() +" deleted.");
}
  
}
else{
System.out.println("The product canot be located. Invalid product.");
}
}

// method to display report
void report() {
double total = 0;
System.out.println("PRODUCT REPORT");
System.out.println("*************************************************");
for(int i=0; i<products.size(); i++){
System.out.println("PRODUNT "+(i+1));
System.out.println("--------------------------------------------------");
System.out.println(products.get(i));
total += products.get(i).getPrice();
System.out.println("--------------------------------------------------");
}
System.out.println("TOTAL PRODUCT COUNT: "+products.size());
System.out.println("TOTAL PRODUCT VALUE: R "+total);
System.out.printf("TOTAL PRODUCT VALUE: R %.2f",total/products.size());
}

}



/*
* class for application with main method
*/
import java.util.Scanner;

public class Application {
  
static ReportData newReport;

public static void main(String[] args) {
// scanner object for reading input
Scanner in = new Scanner(System.in);
// object for ReportData
newReport = new ReportData();
//loop for welcome message
while (true) {
showWelcomeMessage();
String choice = in.nextLine();
if (!choice.equals("1")) {
break;
}
//loop for mrnu
while (true) {
showMenu();
choice = in.nextLine();
if(choice.equals("6"))
break;
switch(choice){
case "1":
newReport.addProduct(in);
break;
case "2":
Product p = newReport.searchProduct(in);
if( p!= null)
System.out.println(p);
else
System.out.println("The product canot be located. Invalid product.");
break;
case "3":
newReport.update(in);
break;
case "4":
newReport.delete(in);
break;
case "5":
newReport.report();
break;
default:
System.out.println("Invalid entry...");
}
}

}
}

//method to display welcome message
private static void showWelcomeMessage() {
System.out.println("BRIGHT FUTURE TECHNOLOGIES APPLICATION");
System.out.println("**************************************");
System.out.println("Enter (1) to launch menu or any other key to exit");
}

//method to display menu
private static void showMenu() {
System.out.println("\nPlease select one of the menu item: ");
System.out.println("(1). Capture a new product");
System.out.println("(2). Search for a product");
System.out.println("(3). Update a product");
System.out.println("(4). Delete a product");
System.out.println("(5). Print report");
System.out.println("(6). Exit application");
}
}

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