*Change arraylist code below to arrays*

Take the Helper class of the previous assignment, and change it to use an array of 10 BestFriend objects, instead of anarrayList 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. You may wish to create a new method for this: shrinkArray(). You may need to pass parameter(s) to this method.

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. You may wish to create a new method for this: expandArray(); You may need to pass parameter(s) to this method.

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import java.util.*;

public class BestFriend

{

private static int number = 0;

private int iD;

private String firstName;

private String lastName;

private String nickName;

private String cellPhoneNumber;

// constructor

public BestFriend(String aFirstName, String aLastName, String aNickName, String aCellPhoneNumber) {

firstName = aFirstName;

lastName = aLastName;

nickName = aNickName;

cellPhoneNumber = aCellPhoneNumber;

number++;

iD = number;

}

// orerride the toString() function which returns the String if the object is printed

public String toString() {

return iD + " " + firstName + " " + lastName + " " + cellPhoneNumber + " "+ ". " + nickName;

}

// setter methods

// set the first name

void setFirstName(String first) {

firstName = first;

}

// set the last name

void setLastName(String last) {

lastName = last;

}

// set the nick name

void setNickName(String nick) {

nickName = nick;

}

// set the cell phone number

void setCellPhoneNumber(String phone) {

cellPhoneNumber = phone;

}

public boolean equals(Object another) {

// if another is an object of class BestFriend

if (another instanceof BestFriend)

{

// type cast another to BestFriend class

BestFriend anotherBFF = (BestFriend) another;

// if the objects are equal

if (firstName.equalsIgnoreCase(anotherBFF.firstName) && lastName.equalsIgnoreCase(anotherBFF.lastName)) {

return true;

}

}

// if the objects are not equal

return false;

} //getter methods

public static int getNumber() {

return number;

}

public int getiD() {

return iD;

}

public String getFirstName() {

return firstName;

}

public String getLastName() {

return lastName;

}

public String getNickName() {

return nickName;

}

public String getCellPhoneNumber() {

return cellPhoneNumber;

}

}

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import java.util.*;

public class BestFriendSimulation {

private static ArrayList best;

// function to display the menu to the user

public static void displayMenu()

{

String MainMenu = "Please Enter Option Number Of your Choice" + " " + "1.) Add BestFriend Contact " + " " + "2.) Change a BestFriend Contact" + " " + "3.) Remove a BestFriend from Phonebook " + " " + "4.) Display all the information in phonebook" + " " + "5.) Exit " + " ";

System.out.println(MainMenu);

}

// main method

public static void main(String arg[]) {

// create a Scanner class object to get user input

Scanner scanner = new Scanner(System.in);

// create an object of class BestFriendHelper

BestFriendHelper helper = new BestFriendHelper();

int option = 0;

// infinite loop

while (true) {

// display the menu

displayMenu();

option = scanner.nextInt();

// if the entered option is invalid

if (option <= 0 || option > 5) {

System.out.println("Invalid Input! Enter input between 1 to 5");

// go to the beginning of the loop

continue;

}

// if user enetered 1

if (option == 1) {

// call the add() method

helper.add();

// if user enetered 2

} else if (option == 2) {

// call the helper() method

helper.change();

// if user enetered 3

} else if (option == 3) {

// call the remove method

helper.remove();

// if user enetered 4

} else if (option == 4) {

// call the display method

helper.display();

// if user enetered 5

} else if (option == 5) {

System.out.println("Exiting");

// break out of the loop

break;

}

}

}

}

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import java.util.ArrayList;

import java.util.Scanner;

public class BestFriendHelper {

// create an object to store the objects fo type BestFriend

private ArrayList best;

// constructor

public BestFriendHelper() {

// initialize arraylist

best = new ArrayList();

}

// function to add data to ArrayList

public void add() {

// create Scanner object to get user input

Scanner scanner = new Scanner(System.in);

System.out.println("Please Enter First Name");

// read the next element

String first = scanner.next();

System.out.println("Please Enter Last Name");

// read the next element

String last = scanner.next();

System.out.println("Please Enter Nick Name");

// read the next element

String nick = scanner.next();

System.out.println("Please Enter Cell Phone Number");

// read the next element

String number = scanner.next();

// create new BestFriend object and add to best object

BestFriend b = new BestFriend(first, last, nick, number); /* Note: This section of the code sorts the list out in alphabetical order, however this causes the order in which the names were inputted, to be lost. */ if (best.size() == 0) {

// adding as the first object

best.add(b);

} else if (b.getFirstName().compareTo(best.get(0).getFirstName()) < 0) {

/**

* Adding before current first object

*/

best.add(0, b);

} else {

// a flag to denote if the object is added or not

boolean added = false;

// looping through all objects

for (int i = 0; i < best.size() - 1; i++) {

/**

* checking if the object can be added to the middle of current

* pair of elements (between positions i and i+1)

*/

if (b.getFirstName().compareTo(best.get(i).getFirstName()) >= 0

&& b.getFirstName().compareTo(

best.get(i + 1).getFirstName()) < 0) {

best.add(i + 1, b);

// added to the middle

added = true;

break;

}

}

// finally, if not added, adding to end

if (!added) {

best.add(b);

}

}

}

public void change() {

// create Scanner object to get user input

Scanner scanner = new Scanner(System.in);

int AS = 0;

System.out.println("Enter First Name Of Friend You Want To Change");

// read the next element

String first = scanner.next();

System.out.println("Enter Last Name Of Friend You Want To Change");

// read the next element

String last = scanner.next();

// create an object of class bestfriend

BestFriend BF = new BestFriend(first, last, "", "");

// store the size

AS = best.size();

// if there is no element in BF

if (AS == 0) {

System.out.print("List is Empty");

return;

}

for (int i = 0; i < AS; i++) {

if (best.get(i).equals(BF)) {

System.out.println("Please Enter New First Name");

// read next element

first = scanner.next();

System.out.println("Please Enter New Last Name");

// read next element

last = scanner.next();

System.out.println("Please Enter New Nick Name");

// read next element

String nick = scanner.next();

System.out.println("Please Enter New Cell Phone Number");

// read next element

String number = scanner.next();

// update the fields of i th element in best

best.get(i).setFirstName(first);

best.get(i).setLastName(last);

best.get(i).setNickName(nick);

best.get(i).setCellPhoneNumber(number);

// break out of loop

break;

}

// if the element is not found

else if (i == AS - 1) {

System.out.println("No Such Friend Exists");

break;

}

}

}

public void remove() {

int AS = 0;

// create Scanner object to get user input

Scanner scanner = new Scanner(System.in);

System.out.println("Enter First Name Of Friend You Want To Remove");

// read next element

String first = scanner.next();

System.out.println("Enter Last Name Of Friend You Want To Remove");

// read next element

String last = scanner.next();

// create object of type BestFriend class

BestFriend BF = new BestFriend(first, last, "", "");

// store the size

AS = best.size();

// if there is no element in BF

if (AS == 0) {

System.out.println("List is Empty");

return;

}

for (int i = 0; i < AS; i++)

{

// if the current element is the required element to be removed

if (best.get(i).equals(BF)) {

// remove the element

best.remove(i);

// break out of loop

break;

}

// if the element is not found

else if (i == AS - 1) {

System.out.println("No Such Friend Exists");

// break out of loop

break;

}

}

}

public void display() {

int AS = best.size();

// if the list is empty

if (AS == 0) {

System.out.println("List is Empty");

return;

}

for (int i = 0; i < AS; i++) {

System.out.println(best.get(i).toString());

}

}

}