Objects and Classes

Requirements

• One class, one file. Don't create multiple classes in the same .java file
• Don't use static variables and methods
• Encapsulation: make sure you protect your class variables and provide access to them through get and set methods
• all the classes are required to have a constructor that receives all the attributes as parameters and updates the attributes accordingly
• all the classes are required to have an "empty" constructor that receives no parameters but updates all the attributes as needed
• Follow Horstmann's Java Language Coding GuidelinesLinks to an external site.
• Organized in packages (MVC - Model - View Controller)

Contents

• Start with this NetBeans project or create one with
  • • App.java
  • Model
    • Model.java
    • Student.java
    • Address.java
    • BirthDate.java

Functionality

• The application App creates a Model object
• The Model class
  • creates 3 Student objects
  • displays information about the three students
  • compares the birth dates of the three Student objects
  • displays a message stating who is the oldest

The classes

• App
  • it has the main method which is the method that Java looks for and runs to start any application
  • it creates an object (an instance) of the Model class
• Model
  • this is the class where all the action is going to happen
  • it creates three students and compare their birth dates and displays a message stating who is older or if they are of the same age
  • make sure you test your application for all the possible cases
• Student
  • has the following attributes
    • int studentId;
    • String firstName;
    • String lastName;
    • BirthDate birthday;
    • Address address;
    • String phoneNumber;
• BirthDate
  • it is a class (or type) which is used in Student defining the type of the attribute birthday
  • it has three attributes
    • int month;
    • int day;
    • int year;
  • it also has a method that returns a formatted string with month, day, year:
    • for instance: 10/10/2000
• Address
  • it is a class (or type) which is used in Student defining the type of the attribute address
  • it also has a method that returns a formatted string such as (without the bullets):
    • 25 Yearsley Mill Rd
    • Media, PA 19063

App Creates a Model object Student int studentld String firstName String lastName BirthDate birthday Address address Model Creates three Student objects Compares their birth dates Displays a message stating who is the oldest . . String phoneNumber BirthDate Address . int month int day int year addressLine1 . addressLine2 city state e zipCode