SavingsAcccount Class

SavingsAccount.java

public class SavingsAccount {
	private double annualInterestRate, balance, accumulativeInterest, accumulativeDeposits = 0, accumulativeWithdrawals = 0;

	// Constructor
	public SavingsAccount(double b)
	{
		balance = b;
	}
	
	// Mutators
	public void withdraw(double w)
	{
		balance -= w;
		accumulativeWithdrawals += w;
	}
	
	public void deposit(double d)
	{
		balance += d;
		accumulativeDeposits += d;
	}
	
	public void addMonthlyInterest()
	{
		accumulativeInterest += balance * (annualInterestRate/12);
		balance += balance * (annualInterestRate/12);
	}
	
	// Setters
	public void setBalance(double b)
	{
		balance = b;
	}
	
	public void setAnnualInterestRate(double air)
	{
		annualInterestRate = air;
	}
	
	// Getters
	public double getBalance()
	{
		return balance;
	}
	
	public double getAnnualInterestRate()
	{
		return annualInterestRate;
	}
	
	public double getMonthlyInterest()
	{
		return balance * (annualInterestRate/12);
	}
	
	public double getAccumulativeInterest()
	{
		return accumulativeInterest;
	}
	
	public double getAccumulativeDeposits()
	{
		return accumulativeDeposits;
	}
	
	public double getAccumulativeWithdrawals()
	{
		return accumulativeWithdrawals;
	}
}

SavingsAccountDemo.java

public class SavingsAccountDemo {
	public static void main(String[] args)
	{
		int monthsPassed = 0;
		
		Scanner userInput = new Scanner(System.in);
		
		// Get starting balance & create demoAccount object
		System.out.print("Please enter the starting balance: $");
		SavingsAccount demoAccount = new SavingsAccount(userInput.nextDouble());
		
		// Gets annual interest rate
		System.out.print("Enter the annual interest rate (decimal): ");
		demoAccount.setAnnualInterestRate(userInput.nextDouble());
		
		// Gets numbers of months that have passed since the establishment of the account
		System.out.print("Enter the number of months that have passed since the account\'s establishment: ");
		monthsPassed = userInput.nextInt();
		
		// Loops through all of the 
		for (int count = 1; count <= monthsPassed; count++)
		{
			// Display month number
			System.out.println("\n-----MONTH " + count + "-----");
			
			// Gets amount deposited into account for the month
			System.out.print("Enter the amount deposited into the account: $");
			demoAccount.deposit(userInput.nextDouble());
			
			
			// Gets amount withdrawn from the account for the month
			System.out.printf("Enter the amount withdrawn from the account: $");
			demoAccount.withdraw(userInput.nextDouble());
			
			// Displays and adds monthly interest
			System.out.printf("This month\'s interest is: $%.2f\n", demoAccount.getMonthlyInterest());
			demoAccount.addMonthlyInterest();
		}
		
		System.out.printf("\nEnding balance: $%.2f", demoAccount.getBalance());
		System.out.printf("\nTotal deposits: $%.2f", demoAccount.getAccumulativeDeposits());
		System.out.printf("\nTotal withdrawals: $%.2f", demoAccount.getAccumulativeWithdrawals());
		System.out.printf("\nTotal interest: $%.2f", demoAccount.getAccumulativeInterest());
		
		
		userInput.close();
	}
}