Develop a simple banking application Checking accounts have a monthly service fee Savings accounts pay interest monthly Three tasks
Identify all object-defining classes required
Sketch a class diagram
Plan the application class with a flowchart
Nouns are modeled by objects
Bank account, checking account, savings account
Verbs are modeled with methods
Assess fee, pay interest
Create a class diagram
Focus on customer, bank account, checking account, and savings account
Checking and savings accounts are specialized bank accounts
Class name in the top section, instance variables in the middle, methods in the bottom
Composition is represented by solid diamonds and inheritance is represented by open arrows
Application class is represented with a flowchart
Customer.java defines Customer objects
SSN, name, checking account, savings account
Constructor, accessor methods for accounts
BankAccount.java defines BankAccount objects, members common to all accounts
Account number, balance, accessor methods, toString
CheckingAccount.java and SavingsAccount.java nearly identical
Checking accounts incur a service charge, savings accrue interest
Both CheckingAccount and SavingsAccount class definitions include extends BankAccount
Constructors call the BankAccount constructor first using the keyword super
BankingApp.java is procedural with 5 parts
Preparation, declaration, input, processing, output
All individual classes must be in the same directory, and be compiled individually
