CR-MicroLabs-Composition-PhoneBook

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PhoneBook Lab:

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PhoneBook Lab

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Write the classes needed to implement a very simple PhoneBook.

• Fork and clone this repository to complete your lab. Submit with a Pull Request.

Unit Tests

• You are expected to write unit tests for your code.
• You must have a Test class for every class you write.
• 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 git pull request from your own fork.
• 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

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Building a basic PhoneBook class

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In this diagram, C stands for Class, f stands for field, and m stands for method. So, it can give you a specification for the class and the things it needs to do.

• 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 from the java standard library.

• Your PhoneBook class should have the following method

  • hasEntry(String name)
    • given a name, return true if there is an entry with that name, false otherwise
  • add(String name, String phoneNumber)
    • adds an entry to the composite associate data type
  • lookup(String name)
    • returns a phone number for the respective input name
  • remove(String name)
    • removes an entry to the composite associate data type
  • reverseLookup(String phoneNumber)
    • returns a name for the respective input phoneNumber <<<<<<< HEAD
  • listNamesAndNumbers()
    • return a human-readable list of all entries (names and phone numbers) in alphabetical order.
    • Format should be [name] [phone number]

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

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   * Sample Script

       ```java
       PhoneBook phoneBook = new PhoneBook();
       phoneBook.add("Zebra", "111-222-333");
       phoneBook.add("Dog", "222-444-4444");

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       phoneBook.listNamesAndNumbers();

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       String entries = phoneBook.toString(); 
       System.out.println(entries);

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       ```

   * 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.