Lecture 17 Objectives

At the end of today's class you should

KNOW:

That encapsulation involves separating a module's implementation details from its API
That a method belongs in the class that contains the data the method is operating on
That access modifiers provide a mechanism for controlling access to fields and methods
That the way for an object in one class to access data defined as private in another class is through a public method

BE ABLE TO:

Choose the appropriate class for a method definition
Choose the appropriate access modifier for a field or method

Sample Exam Question:

Add a deposit() method to the BankingService class we developed. deposit() consumes an account number and an amount to deposit and adds the amount to the balance in the account. The method returns the new account balance. Use principles of encapsulation in designing your new method.