Take the Helper class of the previous assignment, and change it to use an array of 10 BestFriend objects, instead of an arrayList of BestFriend objects. Do all of the requirements of the assignment, but simulate "removing" the element by moving all the following elements up to previous index, and then moving nulls to the last element of the array that was moved to a previous index.

When the array becomes too small to fit a new BestFriend object, define a new array with double the size of the original array, move everything from the original array to the new array, and then reset the reference of the original array to now point to the new array.

Warning: Null pointer exceptions can occur whenever you try to compare an element in the array to the searchObject. Before comparing, make sure you ask:

If (element retrieved from array != null) ...//proceed with the rest of your logic

BEST FRIEND CLASS ------------------------------------------------------------------------------------------------------------------------------------

package skeletonhw;

import java.util.Objects;

public class BestFriend {

private String firstName;

private String lastName;

private String nickName;

private String cellPhone;

private String email;

public BestFriend(String firstName, String lastName, String nickName, String cellPhone, String email) {

this.firstName = firstName;

this.lastName = lastName;

this.nickName = nickName;

this.cellPhone = cellPhone;

this.email = email;

}

public BestFriend(String firstName, String lastName, String nickName) {

this.firstName = firstName;

this.lastName = lastName;

this.nickName = nickName;

}

public String getFirstName() {

return firstName;

}

public void setFirstName(String firstName) {

this.firstName = firstName;

}

public String getLastName() {

return lastName;

}

public void setLastName(String lastName) {

this.lastName = lastName;

}

public String getNickName() {

return nickName;

}

public void setNickName(String nickName) {

this.nickName = nickName;

}

public String getCellPhone() {

return cellPhone;

}

public void setCellPhone(String cellPhone) {

this.cellPhone = cellPhone;

}

public String getEmail() {

return email;

}

public void setEmail(String email) {

this.email = email;

}

@Override

public String toString() {

return "BestFriend{" + "firstName=" + firstName + ", lastName=" + lastName + ", nickName=" + nickName + ", cellPhone=" + cellPhone + ", email=" + email + '}';

}

@Override

public boolean equals (Object obj ) {

BestFriend other;

if (this == obj){

return true;

}

if (obj == null){

return false;

}

if (obj instanceof BestFriend)

{

other = (BestFriend) obj;

}

else

{

return false;

}

if (firstName.equals(other.firstName) &&

lastName.equals(other.lastName) &&

nickName.equals(other.nickName))

return true;

else

return false;

}

}

HELPER CLASS------------------------------------------------------------------------------------------------------------------------------------------

package skeletonhw;

import java.util.ArrayList;

import java.util.Scanner;

public class Helper {

ArrayList myBFFs;

Scanner scnr;

public Helper()

{

myBFFs = new ArrayList<>();

scnr = new Scanner(System.in);

}

public void add()

{

String firstName;

String lastName;

String nickName;

String cellPhone;

String email;

System.out.println("Enter the first name of the friend: ");

firstName = scnr.nextLine();

System.out.println("Enter the last name of the friend: ");

lastName = scnr.nextLine();

System.out.println("Enter the nick-name of the friend: ");

nickName = scnr.nextLine();

System.out.println("Enter the cell-phone "

+ "number of the friend: ");

cellPhone = scnr.nextLine();

System.out.println("Enter the email address of "

+ "the friend: ");

email = scnr.nextLine();

obj.setEmail(email);

BestFriend aFriend; aFriend = new BestFriend (firstName, lastName, nickName, cellPhone, email);

if(myBFFs.isEmpty())

{

myBFFs.add(aFriend);

}

else

{

for(int i=0; i

{

if(aFriend.getFirstName().compareTo

(myBFFs.get(i).getFirstName())

<0)

{

myBFFs.add(i, aFriend);

break;

}

}

}

}

public void change()

{

int returnCode = search();

if(returnCode == -1)

{

System.out.println("NOT FOUND");

}

else

{

String firstName;

String lastName;

String nickName;

String cellPhone;

String email;

BestFriend obj = myBFFs.get(returnCode);

System.out.println(obj);

System.out.println("Enter the new information:");

System.out.println("Enter the first "

+ "name of the friend: ");

firstName = scnr.nextLine();

obj.setFirstName(firstName);

System.out.println("Enter the last "

+ "name of the friend: ");

lastName = scnr.nextLine();

obj.setLastName(lastName);

System.out.println("Enter the nick-name "

+ "of the friend: ");

nickName = scnr.nextLine();

obj.setNickName(nickName);

System.out.println("Enter the cell-phone "

+ "number of the friend: ");

cellPhone = scnr.nextLine();

obj.setCellPhone(cellPhone);

System.out.println("Enter the email "

+ "address of the friend: ");

email = scnr.nextLine();

myBFFs.set(returnCode, obj);

}

}

public void remove()

{

int returnCode = search();

if(returnCode == -1)

{

System.out.println("NOT FOUND");

}

else

{

BestFriend obj = myBFFs.get(returnCode);

System.out.println(obj);

System.out.println("Are you sure you"

+ " want to remove that friend?");

String choice = scnr.nextLine().toUpperCase();

if(choice.compareTo("YES")==0)

{

myBFFs.remove(returnCode);

System.out.println("BFF removed");

}

else

{

System.out.println("BFF remove CANCELLED");

}

}

}

public void display()

{

System.out.println("Choose from one of "

+ "the following options:");

System.out.println("1.Display a specific friend");

System.out.println("2.Display All the friends");

System.out.print("(1/2)?: ");

int choice = scnr.nextInt();

scnr.nextLine();

if(choice == 2)

{

for(int i=0; i< myBFFs.size(); i++)

{

System.out.println(myBFFs.get(i));

}

}

else

{

int returnCode = search();

if(returnCode == -1)

{

System.out.println("NOT FOUND");

}

else

{

BestFriend obj = myBFFs.get(returnCode);

System.out.println(obj);

}

}

}

public int search()

{

String firstName;

String lastName;

String nickName;

System.out.println("Enter the first name of the friend: ");

firstName = scnr.nextLine();

System.out.println("Enter the last name of the friend: ");

lastName = scnr.nextLine();

System.out.println("Enter the nick-name of the friend: ");

nickName = scnr.nextLine();

BestFriend searchObj; searchObj = new BestFriend(firstName, lastName, nickName);

int i=0;

while(i < myBFFs.size())

{

if(searchObj.equals(myBFFs.get(i)))

{

return i;

}

i++;

}

return -1;

}

}

MAIN CLASS---------------------------------------------------------------------------------------------------------------------------------------

package skeletonhw;

import java.util.Scanner;

public class SkeletonHW {

public static void main(String[] args) {

System.out.println("Welcome to the Best Friends' Contacts!");

Helper myHelper = new Helper();

int menuSelection;

do

{

menuSelection = displayMenu();

switch (menuSelection)

{

case 1:

myHelper.add();

System.out.println("new BFF added");

break;

case 2:

myHelper.change();

System.out.println("BFF changed");

break;

case 3:

myHelper.remove();

System.out.println("");

break;

case 4:

System.out.println("calling display method");

myHelper.display();

break;

case 5:

System.out.println("Thanks for using BFF Contacts.");

break;

default:

System.out.println("Sorry, you entered an invalid option. Try Again.");

}

}while (menuSelection != 5);

}

public static int displayMenu()

{

int menuSelection;

Scanner sc = new Scanner(System.in);

System.out.println("1.Add a BestFriend object to their BFF arrayList");

System.out.println("2.Change info of a BestFriend object in their BFF arrayList");

System.out.println("3.Remove a BestFriend object from their BFF arrayList");

System.out.println("4.Display");

System.out.println("5.Exit");

menuSelection = sc.nextInt();

return menuSelection;

}

}