Phone Book

Objective - To implement a PhoneBook class which maps a name to many phoneNumber
Purpose - To establish familiarity Map

Getting Started

Fork and clone this repository to complete your lab. Submit each part with a Pull Request for a separate branch.

Instructions:

Building a basic `PhoneBook` class

Create a PhoneBook class that holds names and phone numbers.
You can use an associative data type (one which stores items as keys paired with values).
Your PhoneBook class should have the following method
- void add(String name, String phoneNumber)
  - adds an entry to the composite associate data type
- void addAll(String name, String... phoneNumbers)
  - adds many phone numbers to a single name entry
- void remove(String name)
  - removes an entry to the composite associate data type
- Boolean hasEntry(String name)
  - removes an entry to the composite associate data type
- List<String> lookup(String name)
  - returns a phone number for the respective input name
- String reverseLookup(String phoneNumber)
  - returns a name for the respective input phoneNumber
- String getAllContactNames()
  - returns a list of all names in this PhoneBook