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Container Classes
lab09a

• Open a new project in BlueJ. You might name your project ContactDirectory.
• Create a class PhoneNumber as described in Problem 9 of the exam solutions. Your class should include the following fields:
  • areaCode
  • exchange
  • extension
• Your PhoneNumber class should also include the following methods:
  • constructor that takes an input value for all three fields
  • getter methods for all fields
  • toCustomString()
  • toStandardString()
• Create a second class Address. Your class should include the following fields:
  • streetAddress
  • city
  • state
  • zipCode
• Your Address class should also include the following methods:
  • constructor that takes an input for all four fields
  • getter methods for all fields
  • toPrettyString() -- return a single string with the entire address
• Create a third class Name. Your class should include the following fields:
  • firstName
  • lastName
  • title
• Your Name class should also include the following methods:
  • constructor that takes an input for all three fields
  • getter methods for all fields
  • toPrettyString() -- returns the full name: title firstName lastName
• Create a fourth class ContactInfo. Your class should include the following fields:
  • name
  • home_address
  • school_address
  • home_phone
  • school_phone
  • mobile_phone
• Your ContactInfo class should also include the following methods:
  • constructor that takes one input, the name of the person who's contact information is being created
  • getter and setter methods for all fields
• Create an instance of ContactInfo that contains your contact information.
• Create an instance of ContactInfo that contains your roommate's contact information.
• Create an instance of ContactInfo that contains contact information for your best friend.
• Note that you may not have information for all fields for your roommate and/or your best friend. This is why the constructor only accepts a single parameter.
• Create a fifth class Directory with the following fields:
  • me
  • roommate
  • bestFriend
• Your Directory class should also include the following methods:
  • constructor that takes a value for each field
  • getter methods for all fields
• Create an instance of Directory and store the contact information that you created above.
• From the Code Pad, use your instance of Directory to retrieve your school phone number.
• From the Code Pad, use your instance of Directory to retrieve your roommate's school phone number.
• From the Code Pad, write an expression to determine if your school phone number equals your roommate's phone number.
• From the Code Pad, write an expression to determine if your home phone number equals your roommate's home phone number.
• Create a method in your Directory class to return the first and last name of each contact in your directory. Separate each name (first and last) with a comma to create a list of contacts.
• Add a boolean parameter to your method that tells the method to display the names in order: (1) first last, or (2) last, first. When listing names with the last name first, separate the first and last name with a comma and separate the names with semicolons (;).

Interesting Methods

• Create a method void copyFrom(PhoneNumber pnum) in your PhoneNumber class. Given a PhoneNumber object, this function will copy the contents of the given number (pnum) into this number .
• Create a method void swap(PhoneNumber pnum) that swaps the contents of this phone number with the given phone number. Hint: use the copyFrom() function you just wrote.
• Create two instances of a PhoneNumber and swap the numbers.

• Create a method void copySchoolPhone2HomePhone() in your ContactInfo class. This method will copy the value of the home phone number field into the work phone number field.
• Create a home phone number and a school phone number (i.e., create two instances of PhoneNumber).
• Inspect the contents of both phone numbers to ensure the numbers are correct. Close the inspectors when you are done.
• Create an instance of ContactInfo and store your home and school phone numbers in the ContactInfo object.
• Inspect the ContactInfo object and inspect both phone numbers to ensure the numbers are correct. Close the phone number inspectors when you are done.
• Call copySchoolPhone2HomePhone() and inspect both phone numbers.
• Inspect your ContactInfo and double click on the home and school phone numbers to inspect the contents.
• Inspect the contents of your home phone number (i.e., the PhoneNumber object on your bench that contains your home number).
• What has happened?
• Repeat the same exercise with Addresses to observe any differences between integers and Strings.

• Review all of your classes and create any additional fields and/or methods that are interesting to you.
• Create additional senarios in Code Pad.
• Make sure to save the objects you create to a test fixture so you do not have to recreate your objects on Friday.

Questions

• Do you think the Microsoft Outlook Contacts application uses an object model similar to what you created in this lab?
• How do you think the Contacts application stores your contact information so that you do not have to recreate your contacts each time you launch the Contacts application?
• What type of methods would your Directory have to provide to persist the contacts that you create?

 

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©2007, Jeff Pittges, Radford University Last modified 2007.Mar.07 (Wed)

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