Implementation of a pseudo bank ATM machine.

Account.java

package assignment_04;

import java.util.ArrayList;
import java.util.Date;

// General account class
class Account {
	int id;
	double balance;
	Date dateCreated = new Date();
	ArrayList transactionLog = new ArrayList();
	ArrayList transferLog = new ArrayList();

	// Constructors
	public Account() {
		id = 0;
		balance = 0;
	}
	public Account(int i, double b) {
		id = i;
		balance = b;
	}

	// Accessor and mutator methods
	public int getId() {
		return id;
	}
	public void setId(int x) {
		id = x;
	}
	public double getBalance() {
		return balance;
	}
	public void setBalance(double x) {
		balance = x;
	}
	public Date getDateCreated() {
		return dateCreated;
	}

	// Account methods
	public void withdraw(double x) {
		String str;
		if (x <= 0) {
			str = "Incorrect value entered. Withdrawal unsuccessful.";
		}
		else if (balance < x) {
			str = "Insufficient funds. Withdrawal unsuccessful.";
		}
		else {
			balance -= x;
			str = String.format("Withdrawal of $%,.2f successful.", x);
		}
		System.out.println(str);
		addEntry(transactionLog, str);
	}
	public void deposit(double x) {
		String str;
		if (x <= 0) {
			str = "Incorrect value entered. Deposit unsuccessful.";
		}
		else {
			balance += x;
			str = String.format("Deposit of $%,.2f successful.", x);
		}
		System.out.println(str);
		addEntry(transactionLog, str);
	}

	// Transfer methods
	public void transferTo(Account acct, double x) {
		String str;
		if (x <= 0)
			str = "Incorrect value entered. Transfer is unsuccessful.";
		else if (this.balance < x)
			str = "Insufficient funds. Transfer is unsuccessful.";
		else {
			this.balance -= x;
			acct.balance += x;
			str = String.format("Transfer of $%,.2f successful.", x);
		}
		System.out.println(str);
		addEntry(transferLog, str);
	}
	public void transferFrom(Account acct, double x) {
		String str;
		if (x <= 0)
			str = "Incorrect value entered. Transfer is unsuccessful.";
		else if (acct.balance < x)
			str = "Insufficient funds. Transfer is unsuccessful.";
		else {
			acct.balance -= x;
			this.balance += x;
			str = String.format("Transfer of $%,.2f successful.", x);
		}
		System.out.println(str);
		addEntry(transferLog, str);
	}

	// Log methods
	public void addEntry(ArrayList a, String str) {
		a.add(new Date() + ": " + str);
	}
	public void printStatement(ArrayList a) {
		if (a.isEmpty())
			System.out.println("Log is empty.");
		else {
			for (int i = 0; i < a.size(); i++)
				System.out.println(a.get(i));
		}
	}
}

// Class for savings accounts
class SavingsAccount extends Account {
	private static double annualInterestRate;

	public SavingsAccount() {
		super();
	}

	public SavingsAccount(int i, double b) {
		super(i, b);
	}

	public static double getAnnualInterestRate() {
		return annualInterestRate;
	}
	public static void setAnnualInterestRate(double x) {
		annualInterestRate = x;
	}
	public double getMonthlyInterest() {
		return annualInterestRate/12/100 * balance;
	}
}

// Class for checking accounts
class CheckingAccount extends Account {
	public CheckingAccount() {
		super();
	}

	public CheckingAccount(int i, double b) {
		super(i, b);
	}

	public void payBill(String s, double x) {
		String str;
		if (x <= 0) {
			str = "Incorrect value entered. Payment unsuccessful.";
		}
		else if (balance < x) {
			str = "Insufficient funds. Payment cannot be made.";
		}
		else {
			balance -= x;
			str = String.format("Payment of $%,.2f to " + s + " is successful.", x);
		}
		System.out.println(str);
		addEntry(transactionLog, str);
	}
}

Assignment_04.java

//*****************************************
//* Joseph Mikhli           Assignment 04 *
//* CISC 3150 MW2           03/22/2012    *
//*****************************************

package assignment_04;

import java.util.Scanner;

public class Assignment_04 {
	public static void main(String[] args) {
		boolean quit = false;
		int option;
		Scanner input = new Scanner(System.in);
		BankingAccount ba = new BankingAccount("John Doe", "123-45-6789",
				"1234 Main St, Brooklyn, NY", 1001, 20000, 1002, 100, 3.0);

		do {
			System.out.println("What would you like to do?");
			System.out.println("1. Deposit");
			System.out.println("2. Withdraw");
			System.out.println("3. Transfer");
			System.out.println("4. View account values");
			System.out.println("5. View account statements");
			System.out.println("6. Pay a bill");
			System.out.println("7. Quit");
			do {
				System.out.print("Enter an option from 1-7: ");
				option = input.nextInt();
				if (option != 1 && option != 2 && option != 3 && option != 4
						 && option != 5 && option != 6 && option != 7)
					System.out.println("Unknown value entered. Try again.");
			} while (option != 1 && option != 2 && option != 3 && option != 4
						 && option != 5 && option != 6 && option != 7);

			switch (option) {
				case 1:
					ba.deposit();
					break;
				case 2:
					ba.withdraw();
					break;
				case 3:
					ba.transfer();
					break;
				case 4:
					ba.values();
					break;
				case 5:
					ba.statement();
					break;
				case 6:
					ba.payBill();
					break;
				case 7:
					quit = true;
					break;
			}
			System.out.println();
		} while (quit == false);

		System.out.println("Goodbye!");
	}
}

BankingAccount.java

package assignment_04;

import java.util.Scanner;

// Aggregate class
class BankingAccount {
	private String name, ssn, address;
	private SavingsAccount sa;
	private CheckingAccount ca;
	private Scanner input = new Scanner(System.in);

	// Constructors
	public BankingAccount() {
		name = "";
		ssn = "";
		address = "";
		sa = new SavingsAccount();
		ca = new CheckingAccount();
	}
	public BankingAccount(String x, String y, String z) {
		name = x;
		ssn = y;
		address = z;
		sa = new SavingsAccount();
		ca = new CheckingAccount();
	}
	public BankingAccount(String x, String y, String z, int i1, double b1,
			int i2, double b2, double intRate) {
		name = x;
		ssn = y;
		address = z;
		sa = new SavingsAccount(i1, b1);
		ca = new CheckingAccount(i2, b2);
		SavingsAccount.setAnnualInterestRate(intRate);
	}

	// Accessor and mutator methods
	public String getName() { return name; }
	public void setName(String x) { name = x; }

	public String getSSN() { return ssn; }
	public void setSSN(String x) { ssn = x; }

	public String getAddress() { return address; }
	public void setAddress(String x) { address = x; }

	// Front-end methods
	public void deposit() {
		int option;
		double amount;

		System.out.println("Which account would you like to deposit to?");
		System.out.println("1. Checking");
		System.out.println("2. Savings");
		do {
			System.out.print("Enter option 1 or 2: ");
			option = input.nextInt();
			if (option != 1 && option != 2)
				System.out.println("Unknown value entered. Try again.");
		} while (option != 1 && option != 2);

		do {
			System.out.print("How much would you like to deposit? $");
			amount = input.nextDouble();
			if (amount <= 0)
				System.out.println("Illogical value entered. Try again.");
		} while (amount <= 0);

		if (option == 1)
			ca.deposit(amount);
		else if (option == 2)
			sa.deposit(amount);
	}
	public void withdraw() {
		int option;
		double amount;

		System.out.println("Which account would you like to withdraw from?");
		System.out.println("1. Checking");
		System.out.println("2. Savings");
		do {
			System.out.print("Enter option 1 or 2: ");
			option = input.nextInt();
			if (option != 1 && option != 2)
				System.out.println("Unknown value entered. Try again.");
		} while (option != 1 && option != 2);

		do {
			System.out.print("How much would you like to withdraw? $");
			amount = input.nextDouble();
			if (amount <= 0)
				System.out.println("Illogical value entered. Try again.");
		} while (amount <= 0);

		if (option == 1)
			ca.withdraw(amount);
		else if (option == 2)
			sa.withdraw(amount);
	}
	public void transfer() {
		int optionA, optionB;
		double amount;

		System.out.println("Which account would you like to perform a transfer"
				+ " operation on?");
		System.out.println("1. Checking");
		System.out.println("2. Savings");
		do {
			System.out.print("Enter option 1 or 2: ");
			optionA = input.nextInt();
			if (optionA != 1 && optionA != 2)
				System.out.println("Unknown value entered. Try again.");
		} while (optionA != 1 && optionA != 2);

		System.out.println("What would you like to do with this account?");
		System.out.println("1. Transfer funds to other account");
		System.out.println("2. Transfer funds from other account");
		do {
			System.out.print("Enter option 1 or 2: ");
			optionB = input.nextInt();
			if (optionB != 1 && optionB != 2)
				System.out.println("Unknown value entered. Try again.");
		} while (optionB != 1 && optionB != 2);

		do {
			System.out.print("How much would you like to transfer? $");
			amount = input.nextDouble();
			if (amount <= 0)
				System.out.println("Illogical value entered. Try again.");
		} while (amount <= 0);

		if (optionA == 1) {
			if(optionB == 1)
				ca.transferTo(sa, amount);
			else if (optionB == 2)
				ca.transferFrom(sa, amount);
		}
		else if (optionA == 2) {
			if(optionB == 1)
				sa.transferTo(ca, amount);
			else if (optionB == 2)
				sa.transferFrom(ca, amount);
		}
	}
	public void values() {
		int option;

		System.out.println("Which account would you like to know the value of?");
		System.out.println("1. Checking");
		System.out.println("2. Savings");
		System.out.println("3. Both accounts");
		do {
			System.out.print("Enter option 1, 2, or 3: ");
			option = input.nextInt();
			if (option != 1 && option != 2 && option != 3)
				System.out.println("Unknown value entered. Try again.");
		} while (option != 1 && option != 2 && option != 3);

		if (option == 1)
			System.out.format("Checking: $%,.2f%n", ca.getBalance());
		else if (option == 2)
			System.out.format("Savings: $%,.2f%n", sa.getBalance());
		else if (option == 3) {
			System.out.format("Checking: $%,.2f%n", ca.getBalance());
			System.out.format("Savings: $%,.2f%n", sa.getBalance());
		}
	}
	public void statement() {
		int option;

		System.out.println("Which account statements would you like?");
		System.out.println("1. Checking");
		System.out.println("2. Savings");
		System.out.println("3. Both accounts");
		do {
			System.out.print("Enter option 1, 2, or 3: ");
			option = input.nextInt();
			if (option != 1 && option != 2 && option != 3)
				System.out.println("Unknown value entered. Try again.");
		} while (option != 1 && option != 2 && option != 3);

		if (option == 1) {
			System.out.println("CHECKING ACCOUNT");
			System.out.println("Transaction Log:");
			ca.printStatement(ca.transactionLog);
			System.out.println("Transfer Log:");
			ca.printStatement(ca.transferLog);
		}
		else if (option == 2) {
			System.out.println("SAVINGS ACCOUNT");
			System.out.println("Transaction Log:");
			sa.printStatement(sa.transactionLog);
			System.out.println("Transfer Log:");
			sa.printStatement(sa.transferLog);
		}
		else if (option == 3) { // Monthly Statement
			System.out.println("CHECKING ACCOUNT");
			System.out.println("Transaction Log:");
			ca.printStatement(ca.transactionLog);
			System.out.println("Transfer Log:");
			ca.printStatement(ca.transferLog);

			System.out.println();

			System.out.println("SAVINGS ACCOUNT");
			System.out.println("Transaction Log:");
			sa.printStatement(sa.transactionLog);
			System.out.println("Transfer Log:");
			sa.printStatement(sa.transferLog);

			System.out.println();
			this.compoundInterest();
		}
	}
	public void payBill() {
		String payee;
		double amount;

		System.out.print("To whom would you like to pay a bill? ");
		payee = input.next();

		do {
			System.out.print("How much would you like to pay? $");
			amount = input.nextDouble();
			if (amount <= 0)
				System.out.println("Illogical value entered. Try again.");
		} while (amount <= 0);

		ca.payBill(payee, amount);
	}
	public void compoundInterest() {
		sa.setBalance(sa.getBalance() + sa.getMonthlyInterest());
		System.out.format("The new savings account balance is: $%,.2f%n", sa.getBalance());
	}
}