Answer to Question #224004 in Java | JSP | JSF for Princess

Question

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:

When the application starts, it must display the following menu structure:

Sample Menu Screenshot

BRIGHT FUTURE TECHNOLOGIES APPLICATION

Enter

(1) to launch menu

or any

other key to exit

Q.1.1

Please select one of the following menu items:

(1) Capture a new product.

(2) Search for a product.

(3) Update a product.

(4) Delete a product.

(6) Print report.

(6) Exit Application

Answer 1

import java.util.ArrayList;
import java.util.Scanner;


class Product {


	private String code;
	private String description;
	private double price;


	// the constructor
	public Product() {
		this.code = "";
		this.description = "";
		this.price = 0;
	}


	public Product(String code, String description, double price) {
		this.code = code;
		this.description = description;
		this.price = price;
	}


	/**
	 * @return the code
	 */
	public String getCode() {
		return code;
	}


	/**
	 * @param code the code to set
	 */
	public void setCode(String code) {
		this.code = code;
	}


	/**
	 * @return the description
	 */
	public String getDescription() {
		return description;
	}


	/**
	 * @param description the description to set
	 */
	public void setDescription(String description) {
		this.description = description;
	}


	/**
	 * @return the price
	 */
	public double getPrice() {
		return price;
	}


	/**
	 * @param price the price to set
	 */
	public void setPrice(double price) {
		this.price = price;
	}


	@Override
	public String toString() {
		return "Product code: " + this.code + "\n" + "Product description: " + this.description + "\n"
				+ "Product price: " + this.price + "\n";


	}
}


public class ProductsProject {
	private static int getProductByCode(ArrayList<Product> products, String code) {
		for (int i = 0; i < products.size(); i++) {
			if (products.get(i).getCode().compareTo(code) == 0) {
				return i;
			}
		}
		return -1;
	}


	/**
	 * Main method
	 * 
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int ch = -1;
		System.out.print("(1) to launch menu or any other key to exit: ");
		ch = input.nextInt();
		if (ch == 1) {
			ArrayList<Product> products = new ArrayList<Product>();
			String code;
			String description;
			double price;


			while (ch != 6) {
				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");
				System.out.print("Your choice: ");
				ch = input.nextInt();
				switch (ch) {
				case 1: {
					input.nextLine();
					System.out.print("Enter product code: ");
					code = input.nextLine();
					System.out.print("Enter product description: ");
					description = input.nextLine();
					System.out.print("Enter product price: ");
					price = input.nextDouble();
					Product newProduct = new Product(code, description, price);
					products.add(newProduct);
					System.out.println("\nProduct has been added.\n");
				}
					break;
				case 2: {
					input.nextLine();
					System.out.print("Enter product code to display: ");
					code = input.nextLine();
					int index = getProductByCode(products, code);
					if (index != -1) {
						System.out.println(products.get(index).toString());
					} else {
						System.out.println("\nWrong product ID.\n");
					}
				}
					break;
				case 3: {
					input.nextLine();
					System.out.print("Enter product code to edit: ");
					code = input.nextLine();
					int index = getProductByCode(products, code);
					if (index != -1) {
						System.out.print("Enter a new product description: ");
						description = input.nextLine();
						System.out.print("Enter a new product price: ");
						price = input.nextDouble();
						Product newProduct = new Product(code, description, price);
						products.remove(index);
						products.add(index, newProduct);
						System.out.println("\nProduct has been updated.\n");
					} else {
						System.out.println("\nWrong product ID.\n");
					}
				}
					break;
				case 4: {
					input.nextLine();
					System.out.print("Enter product code to delete: ");
					code = input.nextLine();
					int index = getProductByCode(products, code);
					if (index != -1) {
						products.remove(index);
						System.out.println("\nProduct has been deleted.\n");
					} else {
						System.out.println("\nWrong product ID.\n");
					}
				}
					break;
				case 5: {
					for (int i = 0; i < products.size(); i++) {
						System.out.println(products.get(i).toString() + "\n");
					}
				}
					break;
				case 6: {
					// exit


				}
					break;


				default: {
					System.out.println("Wrong menu item.");


				}
					break;
				}
			}
		}
		input.close();


	}
}