package cs223bw;

/* Author: B Wahl
 * Date:   1-4-09
 * Purpose: A sample Java class (simplistic bank account)
 */

public class BankAccount {
	
	// Data Fields
	private String account; // account identifier
	private double balance; // account balance
	
	// Constructor
	// Input:  String a for the account identifier (non-null), and
	//         double b for the starting balance
	public BankAccount(String a, double b)
	{
		account = a;
		balance = b;
	}
	
	// Tests whether this BankAccount equals a specified object
	// Input: Object other, the object to compare with
	// Returns: true if "other" is a BankAccount with the same account
	//          identifier as this
	public boolean equals(Object other)
	{
		BankAccount that = (BankAccount)other;
		return this.account.equals(that.account);
	}
	
	// Get method for account
	public String getAccount()
	{
		return account;
	}
	
	// Get method for balance
	public double getBalance()
	{
		return balance;
	}
	
	// Adds given amount to current balance
	// Input:  a positive double
	// Result: balance is increased by that amount
	public void deposit(double amount)
	{
		balance += amount;
	}
	
	// Substracts given amount from current balance
	// Input: a positive double
	// Result: balance is decreased by that amount
	public void withdraw(double amount)
	{
		balance -= amount;
	}
	
	// Converts this BankAccount to a String
	public String toString()
	{
		StringBuffer buff = new StringBuffer();
		buff.append('(');
		buff.append(this.account);
		buff.append(',');
		buff.append(this.balance);
		buff.append(')');
		return buff.toString();
	}
	
	public static void main(String[] args) 
	{
		// create an array of 4 accounts
		BankAccount[] A;          
		A = new BankAccount[4];   
		A[0] = new BankAccount("Joe",5000);
		A[1] = new BankAccount("Chris",0);
		A[2] = new BankAccount("Terry",5000);
		A[3] = new BankAccount("Joe",100);
		
		// Report the accounts
		for(int i=0; i<4; i++)
		{
			System.out.println(A[i]);
		}
		
		// test if A[0] equals any of the others
		System.out.println("A[0].equals(A[0])?  " + A[0].equals(A[0]));
		System.out.println("A[0].equals(A[1])?  " + A[0].equals(A[1]));
		System.out.println("A[0].equals(A[2])?  " + A[0].equals(A[2]));
		System.out.println("A[0].equals(A[3])?  " + A[0].equals(A[3]));
	}

}

---------------------------------------
OUTPUT:

(Joe,5000.0)
(Chris,0.0)
(Terry,5000.0)
(Joe,100.0)
A[0].equals(A[0])?  true
A[0].equals(A[1])?  false
A[0].equals(A[2])?  false
A[0].equals(A[3])?  true