From Problem Descriptions to Classes

From the Description

In Java…

1. What is the name of the class you are creating:

__BankAccount_____________ (ex. Rectangle)

public class _ BankAccount ____________

{

(ex. public class Rectangle)

2. What are the attributes (nouns)?

Name	Type
(ex. length)	(ex. double)
Account number	String
balance	Double

//instance variables

(ex.private double myLength;)

private String myAccountNumber;

private double myBalance;

3. What are the initializers (how do you create an object)?

Parameters (arguments)	What does it do
(ex. length, width)	(ex. Initializes length and width)
Account number, balance	Initialize acct num and balance
Account number	Initialize the account number and balance = 100

//constructors

(ex. public Rectangle(double length, double width))

public BankAccount(String acctNum, double balance)

public BankAccount(String acctNum)

4. What are the behaviors (verbs)?

Name	Returns	Parameters (arguments)	What does it do
(ex. perimeter)	(ex. double)	(ex.)	(ex. calculate the perimeter)
Withdraw	void	amount	Subtract amount from balance
deposit	void	amount	Add amount to balance
getBalance	double		Returns balance

//methods

(ex.//add amount to balance

public double perimeter())

public void withdraw(double amount)

public void deposit(double amount)

public double getBalance()

5. Write the java code filling in the constructors & methods.

6. Write a main method to test our your code.

public static void main(String[] args)

{

(ex. Rectangle rec = new Rectangle(5, 4);

System.out.println(rec.perimeter());

}