public class SavingAccount

{

private double annualInterestRate, balance, accumulativeInterest,

accumulativeDeposits = 0, accumulativeWithdrawals = 0;

public SavingAccount()

{

balance = 0.0;

}

public SavingAccount(double balance)

{

this.balance = balance;

}

public void addMonthlyInterest()

{

accumulativeInterest += (balance * annualInterestRate / 12);

balance += balance * (annualInterestRate / 12);

}

public double getAnnualInterestRate()

{

return annualInterestRate;

}

public double getBalance()

{

return balance;

}

public double getAccumulativeInterest()

{

return accumulativeInterest;

}

public double getAccumulativeDeposits()

{

return accumulativeDeposits;

}

public double getAccumulativeWithdrawals()

{

return accumulativeWithdrawals;

}

public void setAnnualInterestRate(double annualInterestRate)

{

this.annualInterestRate = annualInterestRate;

}

public void setBalance(double balance)

{

this.balance = balance;

}

public void setAccumulativeInterest(double accumulativeInterest)

{

this.accumulativeInterest = accumulativeInterest;

}

public void setAccumulativeDeposits(double accumulativeDeposits)

{

this.accumulativeDeposits = accumulativeDeposits;

}

public void setAccumulativeWithdrawals(double accumulativeWithdrawals)

{

this.accumulativeWithdrawals = accumulativeWithdrawals;

}

public void withdraw(double w)

{

balance -= w;

accumulativeWithdrawals += w;

}

public void deposit(double d)

{

balance += d;

accumulativeDeposits += d;

}

public double getMonthlyInterest()

{

return balance * (annualInterestRate / 12);

}

}

import java.io.*;

public class Assignment8

{

public static void main(String[] args)

{

final int MONTH_PERIOD = 3;

try

{

// create an InputStreamReader object to read from keyboard

InputStreamReader ir = new InputStreamReader(System.in);

// create BufferedReader object br

BufferedReader br = new BufferedReader(ir);

// create printwriter object to write data to the file result.txt

PrintWriter pw = new PrintWriter(new File("result.txt"));

double startingBalance, interestRate;

System.out.print("Enter the starting balance on the account: $");

startingBalance = Double.parseDouble(br.readLine());

SavingAccount savingAccount = new SavingAccount(startingBalance);

System.out.print("Enter the anual interest rate on the account: $");

interestRate = Double.parseDouble(br.readLine());

savingAccount.setAnnualInterestRate(interestRate);

for (int count = 1; count <= MONTH_PERIOD; count++) {

System.out.println(" MONTH " + count + "");

// read the amount to deposit to balance

System.out.printf("Total deposits for this month: $");

savingAccount.deposit(Double.parseDouble(br.readLine()));

// read the amount to withdraw from balance from the console

System.out.printf("Total withdrawals for this month: $");

savingAccount.withdraw(Double.parseDouble(br.readLine()));

savingAccount.addMonthlyInterest();

}

System.out.println(" Quaterly Savings Account Statement");

System.out.printf(" Starting balance:\t$ %.2f", startingBalance);

System.out.printf(" Total deposits:\t\t+ $%.2f",

savingAccount.getAccumulativeDeposits());

System.out.printf(" Total withdrawals:\t- $%.2f",

savingAccount.getAccumulativeWithdrawals());

System.out.printf(" Total interest:\t\t+ $%.2f",

savingAccount.getAccumulativeInterest());

System.out.println(" \t\t\t----------");

System.out.printf(" Ending balance:\t\t $%.2f",

savingAccount.getBalance());

//writing data to file

pw.write(" Starting balance:\t$ " + startingBalance);

pw.write(" Total deposits:\t\t+ $"

+ savingAccount.getAccumulativeDeposits());

pw.write(" Total withdrawals:\t- $"

+ savingAccount.getAccumulativeWithdrawals());

pw.write(" Total interest:\t\t+ $"

+ savingAccount.getAccumulativeInterest());

pw.write(" \t\t\t----------");

pw.write(" Ending balance:\t\t $" + savingAccount.getBalance());

pw.flush();

}

catch (Exception e)

{

}

}

}

Using the test case:

5000 0.035 780.5 472.75 550.25 510 729 350.65

//////////////////////////////////////////////////////////////////////////////

The output is supposed to be:

Quarterly Savings Account Statement Starting balance: $ 5000.00 Total deposits: + $ 2059.75 Total withdrawals: - $ 1333.40 Total interest: + $ 46.86 ---------- Ending balance: $ 5773.21

////////////////////////////////////////////////////////////////////////////

But Im getting

///////////////////////////////////////////////////////////////////////////

Quaterly Savings Account Statement Starting balance: $ 5000.00 Total deposits: + $2059.75 Total withdrawals: - $1333.40 Total interest: + $47.92 ---------- Ending balance: $5774.27

//////////////////////////////////////////////////////////////////////

Can you help me fix the Total interest?