Question

The user must have the option to delete a product that has been saved. The user must first enter the product code to be deleted. Next, the user must confirm whether they want to delete the product.

Answer 1

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


class Product {
	private String code;
	private String warranty;
	private float price;
	private int stockLevel;


	public Product(String code, String warranty, float price, int stockLevel) {
		this.code = code;
		this.warranty = warranty;
		this.price = price;
		this.stockLevel = stockLevel;
	}


	public String toString() {
		return "Code: " + code + "\n" + "Warranty: " + warranty + "\n" + "Price: " + price + "\n" + "Stock level: "
				+ stockLevel + "\n";


	}


	/**
	 * @return the warranty
	 */
	public String getWarranty() {
		return warranty;
	}


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


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


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


	/**
	 * @return the stockLevel
	 */
	public int getStockLevel() {
		return stockLevel;
	}


	/**
	 * @param stockLevel the stockLevel to set
	 */
	public void setStockLevel(int stockLevel) {
		this.stockLevel = stockLevel;
	}


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


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


public class Main {


	private static int getProductIndex(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;
	}


	public static void main(String[] args) {
		Scanner keyboard = new Scanner(System.in);
		ArrayList<Product> products = new ArrayList<Product>();
		int choice = -1;
		String code;
		String warranty;
		float price;
		int stockLevel;
		while (choice != 4) {
			System.out.println("1. Add a new product.");
			System.out.println("2. Delete the product.");
			System.out.println("3. Display all products");
			System.out.println("4. Exit");
			System.out.print("Your choice: ");
			choice = keyboard.nextInt();
			keyboard.nextLine();
			if (choice == 1) {
				System.out.print("Enter code: ");
				code = keyboard.nextLine();
				System.out.print("Enter warranty: ");
				warranty = keyboard.nextLine();
				System.out.print("Enter price: ");
				price = keyboard.nextFloat();
				System.out.print("Enter stock level: ");
				stockLevel = keyboard.nextInt();
				products.add(new Product(code, warranty, price, stockLevel));
			} else if (choice == 2) {
				System.out.print("Enter the product code to be deleted: ");
				code = keyboard.nextLine();
				int index = getProductIndex(products, code);
				if (index != -1) {
					String answer = "";
					while (answer.compareToIgnoreCase("y") != 0 && answer.compareToIgnoreCase("n") != 0) {
						System.out.print("Are you sure you want to delete the product? y/n: ");
						answer = keyboard.nextLine();
					}
					if (answer.compareToIgnoreCase("y") == 0) {
						products.remove(index);
						System.out.println("\nThe product has been deleted.\n");
					}
				} else {
					System.out.println("Wrong code.");
				}
			} else if (choice == 3) {
				for (int i = 0; i < products.size(); i++) {
					System.out.println(products.get(i).toString());
				}
			} else if (choice == 4) {
				// exit
			} else {
				System.out.println("Wrong menu item.");
			}
		}
		keyboard.close();
	}
}