Question

JAVA PROGRAMMING LANGUAGE!!!!

JAVA PROGRAMMING LANGUAGE!!!!

JAVA PROGRAMMING LANGUAGE!!!!

Bank Account and Savings Account Classes

Design an abstract class named BankAccount to hold the following data for a bank account:

• Balance

• Number of deposits this month

• Number of withdrawals

• Annual interest rate

• Monthly service charges

The class should have the following methods:

Constructor:   The constructor should accept arguments for the balance and annual interest rate.

deposit:             A method that accepts an argument for the amount of the deposit The method should add the argument to the account balance. It should also increment the variable holding the number of deposits.

Withdraw: A method that accepts an argument for the amount of the with drawal. The method should subtract the argument from the balance. It should also increment the variable holding the number of withdrawals.

caleInterest: A method that updates the balance by calculating the monthly interest earned by the account, and adding this interest to the balance. This is performed by the following formulas:

Monthly Interest Rate = (Annual Interest Rate /12) Monthly Interest = Balance * Monthly Interest Rate

Balance = Balance + Monthly Interest

monthlyProcess:   A method that subtracts the monthly service charges from the balance, calls the calcInterest method, and then sets the variables that hold the number of withdrawals, number of deposits, and monthly service charges to zero.

Next, design a Savings Account class that extends the BankAccount class. The Savings Account class should have a status field to represent an active or inactive account. If the balance of a savings account falls below $25, it becomes inactive. The status field could be a boolean variable.) No more withdrawals may be made until the balance is raised above $25, at which time the account becomes active again. The savings account class should have the following methods:

Withdraw: A method that determines whether the account is inactive before a withdrawal is made. (No withdrawal will be allowed if the account is not active.) A withdrawal is then made by calling the superclass version of the method.

Deposit: A method that determines whether the account is inactive before a deposit is made. If the account is inactive and the deposit brings the balance above $25, the account becomes active again. A deposit is then made by calling the superclass version of the method.

monthlyProcess:   Before the superclass method is called, this method checks the num ber of withdrawals. If the number of withdrawals for the month is more than 4, a service charge of $1 for each withdrawal above 4 is added to the superclass field that holds the monthly service charges. (Don't forget to check the account balance after the service charge is taken. If the balance falls below $25, the account becomes inactive.)

ALSO INCLUDE THE FOLLOWING CLASSES

BANK.java
BankAccount.java
SavingsAccount.java

Answer 1

Code:

import java.text.DecimalFormat;

public class Driver
{
public static void main(String[] args)
{
// Create a Decimalformat object for formatting output.
DecimalFormat dollar = new DecimalFormat("$#,##0.00");

// Create a SavingsAccount object with a $100 balance,
// 3% interest rate, and a monthly service charge
// of $2.50.
SavingsAccount savings =
new SavingsAccount(100.0, 0.03, 2.50);

// Display what we've got.
System.out.println("Balance: " +
dollar.format(savings.getBalance()));
System.out.println("Number of deposits: " +
savings.getNumDeposits());
System.out.println("Number of withdrawals: " +
savings.getNumWithdrawals());
System.out.println();

// Make some deposits.
savings.deposit(25.00);
savings.deposit(10.00);
savings.deposit(35.00);

// Display what we've done so far.
System.out.println("Balance: " +
dollar.format(savings.getBalance()));
System.out.println("Number of deposits: " +
savings.getNumDeposits());
System.out.println("Number of withdrawals: " +
savings.getNumWithdrawals());
System.out.println();

// Make some withdrawals.
savings.withdraw(100.00);
savings.withdraw(50.00);
savings.withdraw(10.00);
savings.withdraw(1.00);
savings.withdraw(1.00);

// Display what we've done so far.
System.out.println("Balance: " +
dollar.format(savings.getBalance()));
System.out.println("Number of deposits: " +
savings.getNumDeposits());
System.out.println("Number of withdrawals: " +
savings.getNumWithdrawals());
System.out.println();

// Do the monthly processing.
savings.monthlyProcess();

// Display what we've done so far.
System.out.println("Balance: " +
dollar.format(savings.getBalance()));
System.out.println("Number of deposits: " +
savings.getNumDeposits());
System.out.println("Number of withdrawals: " +
savings.getNumWithdrawals());
}
}

--------------------------------------------------------------------------------------------------------------
public abstract class BankAccount {

// The total number of deposits.
private int numDeposits;

// The total number of withdrawals.
private int numWithdrawals;

// The current account balance.
private double balance;

// The annual interest rate. Expressed in decimal form.
private double interestRate;

// The monthly service charges. Reset at the end of the month.
private double monthlyServiceCharge;

public BankAccount(double bal, double intRate, double mon){
this.balance = bal;
this.interestRate = intRate;
this.monthlyServiceCharge = mon;
}

// Adds funds to the balance.
public void deposit(double amount){
balance += amount;
numDeposits++;
}

// Deducts funds from the balance.
public void withdraw(double amount){
balance -= amount;
numWithdrawals++;
}

// Calculate interest on the account balance.
private void calcInterest(){
balance += balance * (interestRate / 12);
}

// Closes the monthly cycle and prepares the account for the next month.
public void monthlyProcess(){
balance -= monthlyServiceCharge;
calcInterest();
numDeposits = 0;
numWithdrawals = 0;
monthlyServiceCharge = 0;
}

// Sets a new monthly service charge amount.
public void setMonthlyServiceCharges(double amount){
monthlyServiceCharge = amount;
}

// Returns the account balance.
public double getBalance(){
return balance;
}

// Returns the total number of deposits.
public int getNumDeposits(){
return numDeposits;
}

// Returns the total withdrawals for the month.
public int getNumWithdrawals(){
return numWithdrawals;
}

// Returns the annual interest rate.
public double getInterestRate(){
return interestRate;
}

//Returns the current monthly service charge.
public double getMonthlyServiceCharges(){
return monthlyServiceCharge;
}
}

-----------------------------------------------------------------------------------------------------------

public class SavingsAccount extends BankAccount{

// current status of the account.
private boolean status;

public SavingsAccount(double bal, double intRate, double mon){
super(bal, intRate, mon);
status = true;
}

// Confirms account is active, then deducts funds from balance.

@Override
public void withdraw(double amount){
if(status){
super.withdraw(amount);
}
if(super.getBalance() < 25){
status = false;
}
}

// Confirms the account is active, then adds funds to the balance.

@Override
public void deposit(double amount){
if(status || super.getBalance() + amount > 25){
super.deposit(amount);
status = true;
}
}

// Closes the monthly cycle and prepares the account for the next month.

@Override
public void monthlyProcess(){
if(super.getNumWithdrawals() > 4){
super.setMonthlyServiceCharges(super.getMonthlyServiceCharges() +
(super.getNumWithdrawals() - 4));
}
super.monthlyProcess();
if(super.getBalance() < 25){
status = false;
}
}
}