ZCW-PhoneBook

Holding Objects Lab:

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

Unit Tests

• You are expected to write unit tests for your code.
• Be sure to write the tests before implementing the functionality being tested.
• Tests must be thorough and address all possible paths through each method.

Submission

• Your completed lab must be submitted via GitHub.
• Labs are not complete unless they include UML diagrams of all implemented classes, as well as unit tests for all features.

Instructions:

Building a basic PhoneBook class

![PhoneBookDesign]("PhoneBookUML.png")

• 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).

• Hint: You should use a sorted map.

• Your PhoneBook class should have the following method

  • add(String name, String phoneNumber)
    • adds an entry to the composite associate data type
  • remove(String name)
    • removes an entry to the composite associate data type

  • lookup(String name)

    • returns a phone number for the respective input name

  • reverseLookup(String phoneNumber)

    • returns a name for the respective input phoneNumber

  • toString()

    • return a human-readable list of all entries (names and phone numbers) in alphabetical order.

    • Sample Script

       PhoneBook phoneBook = new PhoneBook();
       phoneBook.add("Zebra", "111-222-333");
       phoneBook.add("Dog", "222-444-4444");
               
       String entries = phoneBook.toString(); 
       System.out.println(entries);
    

    • Sample Output
      

        Dog 222-444-4444
        Zebra 111-222-333
    

Implementing Many-PhoneNumbers-To-One-Person Relationship

• Some people have more than one phone number.
• Refactor your PhoneBook class to map names to lists of phone numbers.
• You should modify your add() and remove() methods to handle adding or removing individual numbers
• Create a removeRecord method for removing an entire entry from your PhoneBook.