Answer to Question #249475 in Java | JSP | JSF for Locos

Question

Write a menu driven application to maintain the smart phone technical specifications

for various brands using JAVA. Use constructors, getter and setter functions. Your

application must contain the following functionalities.

 

  For each mobile your application must maintain the details such as productName,    

    operatingSystem, displaySize, memory, etc.

  Get the product details from admin

  In the menu give the user options to add, edit, delete or display the smart phone details

Answer 1

public class SmartPhone {
    private int productNumber;
    private String operatingSystem;
    private double displaySize;
    private int memory;

    public SmartPhone() {
        this.productNumber = -1;
        this.operatingSystem = "Unknown";
        this.displaySize = -1;
        this.memory = -1;
    }

    public SmartPhone(int productNumber, String operatingSystem, double displaySize, int memory) {
        this.productNumber = productNumber;
        this.operatingSystem = operatingSystem;
        this.displaySize = displaySize;
        this.memory = memory;
    }

    public int getProductNumber() {
        return productNumber;
    }

    public void setProductNumber(int productNumber) {
        this.productNumber = productNumber;
    }

    public String getOperatingSystem() {
        return operatingSystem;
    }

    public void setOperatingSystem(String operatingSystem) {
        this.operatingSystem = operatingSystem;
    }

    public double getDisplaySize() {
        return displaySize;
    }

    public void setDisplaySize(double displaySize) {
        this.displaySize = displaySize;
    }

    public int getMemory() {
        return memory;
    }

    public void setMemory(int memory) {
        this.memory = memory;
    }

    @Override
    public String toString() {
        return "SmartPhone{" +
                "productNumber=" + productNumber +
                ", operatingSystem='" + operatingSystem + '\'' +
                ", displaySize=" + displaySize +
                ", memory=" + memory +
                '}';
    }
}

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

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String input;
        int index;
        ArrayList<SmartPhone> smartPhones = new ArrayList<>();
        smartPhones.add(new SmartPhone(1, "Symbian", 2, 30));
        smartPhones.add(new SmartPhone(2, "Android", 4, 60));
        smartPhones.add(new SmartPhone(3, "Windows", 3.5, 45));
        while (true) {
            System.out.println("\n1. Add\n" +
                    "2. Edit\n" +
                    "3. Delete\n" +
                    "4. Display\n" +
                    "0. Exit");
            input = in.nextLine();
            switch (input) {
                case "1":
                    SmartPhone smartPhone = new SmartPhone();
                    System.out.println("Product number:");
                    smartPhone.setProductNumber(Integer.parseInt(in.nextLine()));
                    System.out.println("Operating system:");
                    smartPhone.setOperatingSystem(in.nextLine());
                    System.out.println("Display size:");
                    smartPhone.setDisplaySize(Double.parseDouble(in.nextLine()));
                    System.out.println("Product number:");
                    smartPhone.setMemory(Integer.parseInt(in.nextLine()));
                    smartPhones.add(smartPhone);
                    break;
                case "2":
                    System.out.println("Enter index to update:");
                    index = Integer.parseInt(in.nextLine());
                    if (index >= 0 && index < smartPhones.size()) {
                        while (true) {
                            System.out.println("a. Product number\n" +
                                    "b. Operating system\n" +
                                    "c. Display size\n" +
                                    "d. Product number\n" +
                                    "s. Skip");
                            input = in.nextLine();
                            if (input.equalsIgnoreCase("a")) {
                                System.out.println("Product number:");
                                smartPhones.get(index).setProductNumber(Integer.parseInt(in.nextLine()));
                            } else if (input.equalsIgnoreCase("b")) {
                                System.out.println("Operating system:");
                                smartPhones.get(index).setOperatingSystem(in.nextLine());
                            } else if (input.equalsIgnoreCase("c")) {
                                System.out.println("Display size:");
                                smartPhones.get(index).setDisplaySize(Double.parseDouble(in.nextLine()));
                            } else if (input.equalsIgnoreCase("d")) {
                                System.out.println("Product number:");
                                smartPhones.get(index).setMemory(Integer.parseInt(in.nextLine()));
                            } else if (input.equalsIgnoreCase("s")) {
                                break;
                            }
                            if (input.charAt(0) >= 'a' && input.charAt(0) <= 'd') {
                                System.out.println(index + " <- Updated");
                            }
                        }
                    }

                    break;
                case "3":
                    System.out.println("Enter index to delete:");
                    index = Integer.parseInt(in.nextLine());
                    if (index >= 0 && index < smartPhones.size()) {
                        smartPhones.remove(index);
                        System.out.println(index + " <- Deleted");
                    }
                    break;
                case "4":
                    for (int i = 0; i < smartPhones.size(); i++) {
                        System.out.println(i + " " + smartPhones.get(i));
                    }
                    break;
                case "0":
                    System.exit(0);

            }
        }
    }
}