Personal project to help me get familiarized: was serializing well, but now that ive changed a few things in each class

import com.profiles.Customer;
import com.profiles.Employee;
import com.interfaces.Menus;
import com.profiles.Profiles;

import java.util.Scanner;

public class MassageCreations {

  public static void main(String [] args) {

    //------------------------------------ GOALS:
//    Create a menu containing:                                                                           Done
    System.out.printf("Main Menu %n a. Customers %n b. Employee Tool %n c. Money %n");
    System.out.println("Select a letter and press enter");
    Scanner scan = new Scanner(System.in);
    String menuChoice = scan.nextLine();
    Menus menu = new Menus(menuChoice);

     }
//      a. Customer Database                                                                 Done                                                                           
//            1. Have the user add a Customer Profile                                        done
//            2. Have the Customer profile SAVED                                             Done
//                i. add all customers to a TreeMap                                          done
//               ii. save customers in TreeMap                                               done
//            3. Have the ability to call up a specific Customer Profile by name             done
//            4. Have the profile match the sign in sheet                                    next
//      b. Employee Database
//            1. Hava a database of employees                                                done
//              i. Profiles for employees contain availability and skills                    
//            2. hava a time sheet for clock in and out times
//            3. have the ability to edit the time sheet
//      c. Money
//            1. Keep a reciept History including method paid
     //add ability to keep track of history at the massages

}

package com.interfaces;
import com.profiles.Customer;
import com.profiles.Employee;
import com.profiles.Profiles;

import java.util.Scanner;
import java.util.Date;

public class Menus {

  private String mFirstName;
  private String mLastName;
  private String mPhoneNumber;
  private String mAddress;
  private String mDOB;
  private String mZipCode;
  private String mState;
  private String mCity;
//    Customer customer = new Customer();
//    Employee employee = new Employee();
  private String mMenuChoice;
  private Profiles profiles = new Profiles(new Date());

  public Menus(String menuChoice) {
    mMenuChoice = menuChoice;
    switch(menuChoice) {
      case "a": customerMenu();
      break;
      case "b": employeeMenu();
      break;
      default: System.out.println("Error: Try again. Input was not a valid option");
    }
  }

  public void customerMenu() {            //MAKE SURE TO CHECK INPUT OUTPUT OF THIS METHOD, UNDECIDED SO FAR!!!!!!!!!!!!!!
      System.out.printf("Customer Database: %n %n Select a letter and press enter %n");
      System.out.printf("a. Add Profile %nb. Search Profile %n ");
      Scanner scan = new Scanner(System.in);
      String menuChoice = scan.nextLine();
        switch(menuChoice) {
          case "a": 
            System.out.println("Last name:");
                  mLastName = scan.nextLine();
            System.out.println("First name:");
                  mFirstName = scan.nextLine();
            Customer newCustomer = new Customer(mLastName, mFirstName);
            String printProfile = newCustomer.fillInfoSheet();
            String printCommentCard = newCustomer.fillCommentSheet();
            System.out.printf("%s %n %s", printProfile, printCommentCard);
            String fullName = (mLastName + ", " + mFirstName);
            profiles.addCustomer(fullName, newCustomer);
            System.out.printf("%n%nSave Customer? y/n"); String saveAnswer = scan.nextLine();
            if(saveAnswer.contains("y")){
              profiles.save(profiles);
              } else { System.out.println("Profile not saved, thank you for practicing!"); }
           // Profiles.save(newCustomer); !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

          break;
          case "b": 
            System.out.println("Last name:");
                  mLastName = scan.nextLine();
            System.out.println("First name:");
                  mFirstName = scan.nextLine(); 
            String lastFirst = (mLastName + ", " + mFirstName);
            profiles = profiles.load();
            Customer loadedCustomer = profiles.getCustomer(lastFirst); 
            System.out.printf("%s", loadedCustomer.toString());          
          break;
          default: System.out.println("Oops! not an option. Please try again");
        }
    }

  public void employeeMenu() {            //MAKE SURE TO CHECK INPUT OUTPUT OF THIS METHOD, UNDECIDED SO FAR!!!!!!!!!!!!!!
      System.out.printf("Employee Database: %n %n Select a letter and press enter %n");
      System.out.printf("a. Add Profile %nb. Search Profile %nc. Clock In/Out %n ");
      Scanner scan = new Scanner(System.in);
      String menuChoice = scan.nextLine();
        switch(menuChoice) {
          case "a": 
            System.out.println("Last name:");
                  mLastName = scan.nextLine();
            System.out.println("First name:");
                  mFirstName = scan.nextLine();
            Employee newEmployee = new Employee(mLastName, mFirstName);
            newEmployee.fillInfoSheet();//FIX IT TO AFFECT THE INSTANCE INSTEAD OF CALLING
            String fullName = (mLastName + ", " + mFirstName);
            profiles.addEmployee(fullName, newEmployee);
            System.out.println("Save New Employee? y/n"); String saveAnswer = scan.nextLine();
            if(saveAnswer.contains("y")){
              profiles.save(profiles);
              } else { System.out.println("Profile not saved, thank you for practicing!"); }

          break;
          case "b": 
            System.out.println("Last name:");
                  mLastName = scan.nextLine();
            System.out.println("First name:");
                  mFirstName = scan.nextLine(); 
            String lastFirst = (mLastName + ", " + mFirstName);
            profiles = profiles.load();
            Employee loadedEmployee = profiles.getEmployee(lastFirst); 
            System.out.printf("%s", loadedEmployee.toString());
          break;
          default: System.out.println("Oops! not an option. Please try again");
        }
    }
}

package com.profiles;

import java.util.Arrays;
import java.util.ArrayList;
import java.util.List;
import java.util.Date;
import java.io.Serializable;
import java.util.Scanner;

public class Customer implements Serializable{
  private String mFirstName;
  private String mLastName;
  private String mPhoneNumber = null;
  private String mAddress;
  private String mDOB;
  private String mZipCode;
  private String mState;
  private String mCity;
  private String selection;
  private String healthCare;
  private String HCPhone;
  private String advertisment;
  private String commentCard = "";


  Date date = new Date();

    public Customer(String lastName, String firstName) {
      mFirstName = firstName; 
      mLastName = lastName;      
    }

  public String fillInfoSheet() {
    Scanner scan = new Scanner(System.in);
    do {
      try {     
    System.out.println("Date of Birth: (mm/dd/yyyy)"); mDOB = scan.nextLine(); 
        if (!mDOB.matches("([0-9/]{2}){5}")) {
        throw new IllegalArgumentException();
      }
    } catch(IllegalArgumentException iae) { System.out.println("Not a valid Date of Birth. Try again"); mDOB = null; }
    } while(mDOB == null);        
    do {
      try { 
        System.out.println("Phone Number: (10 digit numbers only)"); mPhoneNumber = scan.nextLine();
        if (!mPhoneNumber.matches("[0-9]{10}")) {
        throw new IllegalArgumentException();
      }
    } catch(IllegalArgumentException iae) { System.out.println("Not a valid number. Try again"); mPhoneNumber = null; }
    } while(mPhoneNumber == null);
    System.out.println("STREET Address:"); mAddress = scan.nextLine(); 
    System.out.println("City:"); mCity = scan.nextLine(); 
    do {
      try {
    System.out.println("Zip Code: (#####)"); mZipCode = scan.nextLine(); 
        if (!mZipCode.matches("[0-9]{5}")) {
        throw new IllegalArgumentException();
      }
    } catch(IllegalArgumentException iae) { System.out.println("Not a valid Zip Code. Try again"); mZipCode = null; }   
    } while(mZipCode == null);
    do {
      try {
    System.out.println("State by initial: (FL)"); mState = scan.nextLine();                                 
    if(!mState.matches("[A-Za-z]{2}")) {
        throw new IllegalArgumentException();
      }
    } catch(IllegalArgumentException iae) {System.out.println("Not a valid State Abrv. Try again"); mState = null; }
    }while(mState == null);
    String bundledReturn = mLastName + ", " + mFirstName + "/ "+ mDOB + "/ " + mPhoneNumber + "/ " + mAddress + ", " + mState + ". " + mZipCode;
    return bundledReturn;
  }

  public String fillCommentSheet() {
    Scanner scan = new Scanner(System.in);
    System.out.println("How did they hear about us?"); advertisment = scan.nextLine();
    System.out.println("Current Health Care Professional:"); healthCare = scan.nextLine();
    do {
      try { 
    System.out.println("Health Care Professional Phone number:"); HCPhone  = scan.nextLine();
        if (!HCPhone.matches("[0-9]{10}")) {
        throw new IllegalArgumentException();
      }
    } catch(IllegalArgumentException iae) { System.out.println("Not a valid number. Try again"); HCPhone = null; }
    } while(HCPhone == null);

    System.out.println("Type in each number that applies, separated by a comma each (1,2,3,4.....). Place a comma even if there is only 1 selection");
    System.out.printf("%n1. Relaxation          2. Injury rehab        3. Pain Relief%n4. Headache relief         5. Skin Care         6.Increased Circulation");
    System.out.printf("%n7. Improved posture    8. Muscle Spasm Relief 9. Increased Range of Motion %n10. Other %n");
    selection = scan.nextLine();
    if(selection.contains("1, ")){
      commentCard += "Relaxation, ";
    }
    if(selection.contains("2")){
      commentCard += "Injury rehab, ";
    }
    if(selection.contains("3")){
      commentCard += "Pain Relief, ";
    }
    if(selection.contains("4")){
      commentCard += "Headache Relief, ";
    }
    if(selection.contains("5")){
      commentCard += "Skin Care, ";
    }
    if(selection.contains("6")){
      commentCard += "Increased circulation, ";
    }
    if(selection.contains("7")){
      commentCard += "Improved Posture, ";
    }
    if(selection.contains("8")){
      commentCard += "Muscle Spsm Relief, ";
    }       
    if(selection.contains("9")){
      commentCard += "Increased range of motion, ";
    }
    if(selection.contains("10, ")){
      System.out.println("Explain Other goals:");
      String otherGoals = scan.nextLine();
      commentCard += ("%nOther Goals:" + otherGoals);
    } 
    String bundledReturn = advertisment + "/" + healthCare + " " + HCPhone + "/" + commentCard;
    return bundledReturn;
  } 



  @Override
  public String toString() {
    return String.format("%s, %s    %s      %n(%s) %n%s, %s, %s (%s)", mLastName, mFirstName, mDOB, mPhoneNumber, mAddress, mCity, mState,                                                                                  mZipCode);
  }
}

package com.profiles;

import java.util.Arrays;
import java.util.ArrayList;
import java.util.List;
import java.util.Date;
import java.io.Serializable;
import java.util.Scanner;

public class Employee implements Serializable{
  private String mFirstName;
  private String mLastName;
  private String mPhoneNumber;
  private String mSkills;
  private String mComments;

  public Employee(String lastName, String firstName) {
      mFirstName = firstName; 
      mLastName = lastName;      
  }

  public void fillInfoSheet() {
    Scanner scan = new Scanner(System.in);    
    System.out.println("Phone Number:");
    mPhoneNumber = scan.nextLine();         //FIXIT error parameters
    System.out.println("Theraputic Skill Set: (type as many that apply to this person)%n");
    mSkills = scan.nextLine();
    System.out.println("Comments: (type whatver you want here)");
    mComments = scan.nextLine();
    }

  @Override
  public String toString() {
    return String.format("%s, %s %n(%s) %n %s %n %s", mLastName, mFirstName, mPhoneNumber, mSkills, mComments);
  }

}

package com.profiles; //importing the target folder

import com.profiles.Customer;
import com.profiles.Employee;
import com.interfaces.Menus;

import java.util.TreeMap;
import java.util.Date;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Map;
import java.io.*;          //importing the tools necisary for input/output

public class Profiles implements Serializable{      //Starts as a class like any other, this is just a method we are creating

private Map<String, Customer> customerList = new TreeMap<>(); //create a map of all the customers made.
private Map<String, Employee> employeeList = new TreeMap<>();
private Date newDate;

public Profiles(Date date){
  date = newDate;
}
public static void save(Profiles profiles) { //saving to an a object array
     try( FileOutputStream fos = new FileOutputStream("profiles.ser"); //try: to save this file 
          ObjectOutputStream oos = new ObjectOutputStream(fos);      //and give it a serial number
         ){ //use this so that it saves the TreeMaps
        oos.writeObject(profiles);                                        //using this 
        } catch(IOException ioe) {                                      //heres some exceptions
        System.out.println("Problem saving Profiles");
        ioe.printStackTrace();
      } 
 }
public static Profiles load() {
  Profiles loadedProfile = new Profiles(new Date());
    try( FileInputStream fis = new FileInputStream("profiles.ser");
         ObjectInputStream ois = new ObjectInputStream(fis);
        ){ loadedProfile = (Profiles) ois.readObject();
         } catch(IOException ioe) { 
            System.out.println("Error reading file"); ioe.printStackTrace(); 
         } catch(ClassNotFoundException cnfe) { 
            System.out.println("Error loading customer");                                                                                                       cnfe.printStackTrace();
           }
    return loadedProfile;
 }

public void addCustomer(String name, Customer customer) {
  customerList.put(name, customer);
}

public Customer getCustomer(String Name) {
  Customer slot = customerList.get(Name);
  return slot;
}

public void addEmployee(String name, Employee employee) {
  employeeList.put(name, employee); 
}

public Employee getEmployee(String Name) {
  Employee slot = employeeList.get(Name);
  return slot;
}

public Date getDate() {
  return newDate;
}

}