Mobile PhoneCreate a program that implements a simple mobile phone with the following capabilities.1.  Implement the master class MobilePhone, that holds the ArrayList of Contacts, with the following attributes:    -  Two fields, a String called myNumber and an ArrayList of type Contact called myContacts.    -  A constructor that takes a String (the phone number) and initialises myNumber and instantiates myContacts.    -  And seven methods, they are (their functions are in their names):        -  addNewContact(), has one parameter of type Contact and returns a boolean. Returns true if the contact doesn't exists, or false if the contact already exists.        -  updateContact(), has two parameters of type Contact (the old contact that will be updated with the new contact) and returns a boolean. Returns true if the contact exists and was updated successfully, or false if the contact doesn't exists.        -  removeContact(), has one parameter of type Contact and returns a boolean. Returns true if the contact exists and was removed successfully, or false if the contact doesn't exists.        -  findContact(), has one parameter of type Contact and returns an int. The returned value is it's position in the ArrayList, it will either be -1 (doesn't exists) or a value greater than or equal to 0 (does exists).        -  findContact(), same as above, only it has one parameter of type String.        -  queryContact(), has one parameter of type String and returns a Contact. Use the String to search for the name and then return the Contact. Return null otherwise.        -  printContacts(), has no parameters and doesn't return anything. Print the contacts in the following format:Contact List:1. Bob -> 314159262. Alice -> 161803393. Tom -> 112358134. Jane -> 235711132. Implement the Contact class with the following attributes:    -  Two fields, both String, one called name and the other phoneNumber.    -  A constructor that takes two Strings, and initialises name and phoneNumber.    -  And Three methods, they are:        -  getName(), getter for name.        -  getPhoneNumber(), getter for phoneNumber.        -  createContact(), has two parameters of type String (the persons name and phone number) and returns an instance of Contact. This is the only method that is static.TIP:  In MobilePhone, use findContact() in the other methods (except printContacts()) to check if it exists before proceeding.TIP:  Two Contact objects are equal if they have the same name.TIP:  Be extremely careful about spaces in the printed message.NOTE:  All fields are private.NOTE:  Constructors should be defined as public.NOTE:  All methods should be defined as public (except for the two findContact() methods which are private).NOTE:  Do not add a main method to the solution code.NOTE: Classes that are not in the java.lang package should be manually imported.NOTE:  If you get an error from the Evaluate class, it's most likely the constructor. Check if you've added a constructor or if the constructor has the right arguments.

public class Contact {
    private String name;
    private String phoneNumber;

    public Contact(String name, String phoneNumber) {
        this.name = name;
        this.phoneNumber = phoneNumber;
    }

    public String getName() {
        return name;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public static Contact createContact(String name, String phoneNumber) {
        return new Contact(name, phoneNumber);
    }
}

import java.util.ArrayList;

public class MobilePhone {
    private String myNumber;
    private ArrayList<Contact> myContacts;

    public MobilePhone(String myNumber) {
        this.myNumber = myNumber;
        this.myContacts = new ArrayList<Contact>();
    }

    public boolean addNewContact(Contact contact) {
        if(findContact(contact.getName()) >=0) {
            return false;
        }

        myContacts.add(contact);
        return true;
    }

    public boolean updateContact(Contact oldContact, Contact newContact) {
        int foundPosition = findContact(oldContact);
        if(foundPosition <0) {
            return false;
        }

        this.myContacts.set(foundPosition, newContact);
        return true;
    }

    public boolean removeContact(Contact contact) {
        int foundPosition = findContact(contact);
        if(foundPosition <0) {
            return false;
        }

        this.myContacts.remove(foundPosition);
        return true;
    }

    private int findContact(Contact contact) {
        return this.myContacts.indexOf(contact);
    }

    private int findContact(String contactName) {
        for(int i=0; i<this.myContacts.size(); i++) {
            Contact contact = this.myContacts.get(i);
            if(contact.getName().equals(contactName)) {
                return i;
            }
        }
        return -1;
    }

    public Contact queryContact(String name) {
        int position = findContact(name);
        if(position >=0) {
            return this.myContacts.get(position);
        }

        return null;
    }

    public void printContacts() {
        System.out.println("Contact List:");
        for(int i=0; i<this.myContacts.size(); i++) {
            System.out.println((i+1) + ". " +
                    this.myContacts.get(i).getName() + " -> " +
                    this.myContacts.get(i).getPhoneNumber());
        }
    }
}