Question

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package checkingaccounttest;

// Chapter 9 Part II Solution

public class CheckingAccountTest {

public static void main(String[] args) {

  

CheckingAccount c1 = new CheckingAccount(879101,3000);

c1.deposit(350);

c1.deposit(220);

c1.withdraw(100);

c1.deposit(1100);

c1.deposit(700);

c1.withdraw(350);

c1.withdraw(220);

c1.withdraw(100);

c1.deposit(1100);

c1.deposit(700);

c1.deposit(1000);

System.out.println(c1);

System.out.println("After calling computeMonthlyFee()");

c1.computeMonthlyFee();

System.out.println(c1);

}

}

class BankAccount {

private int accountNumber;

private double balance;

public BankAccount(int accountNumber, double balance)

{

this.accountNumber = accountNumber;

this.balance=balance;

}

public int getAccountNumber() {return accountNumber;}

public double getBalance() {return balance;}

public void setAccountNumber(int accountNumber) {this.accountNumber = accountNumber;}

public void setBalance(double balance) {this.balance = balance;}

public void deposit(double amount) {

balance = balance + amount;

}

public void withdraw(double amount) {

if (amount <= balance)

balance = balance - amount;

}

  

public String toString() {

return String.format("Account Number=%d%nBalance=$%.2f%n",accountNumber,balance);

}

}

class CheckingAccount extends BankAccount

{

private int transactionCount=0;

private static final int FREE_TRANSACTIONS = 10;

private static final double TRANSACTION_FEE = 2.0;

public CheckingAccount(int accountNumber, double balance)

{

super(accountNumber, balance);

}

public int getTransactionCount() { return transactionCount;}

public void setTransactionCount(int transactionCount) {this.transactionCount = transactionCount;}

public void deposit(double amount) {

super.deposit(amount);

transactionCount++;

}

public void withdraw(double amount) {

super.withdraw(amount);

transactionCount++;

}

  

public void computeMonthlyFee() {

  

if (transactionCount > FREE_TRANSACTIONS)

{

double fees = TRANSACTION_FEE * (transactionCount - FREE_TRANSACTIONS);

  

withdraw(fees);

}

transactionCount = 0;

}

  

public String toString() {

  

return String.format("%sTransaction Count=%d",super.toString(),transactionCount);

}

}

Your task is to modify the computeMonthlyFee() method so that, if there is a fee, it displays the balance before and after applying the fee (if there is no fee, the method does not display anything). Run your program and ensure that it produces the following output: (10 points)

Account Number=879101

Balance=$7400.00

Transaction Count=11

These two lines are produced by the computeMonthlyFee() method.

After calling computeMonthlyFee()

Balance before applying the fee=$7400.00

Balance after applying fee=$7398.00

Account Number=879101

Balance=$7398.00

Answer 1

Comment or Uncomment one transaction to see the difference

public class CheckingAccountTest {

public static void main(String[] args) {

CheckingAccount c1 = new CheckingAccount(879101,3000);
c1.deposit(350);
c1.deposit(220);
c1.withdraw(100);
c1.deposit(1100);
c1.deposit(700);
c1.withdraw(350);
c1.withdraw(220);
//c1.withdraw(100);
c1.deposit(1100);
c1.deposit(700);
c1.deposit(1000);
System.out.println(c1);
System.out.println("After calling computeMonthlyFee()");
double before=c1.getBalance();
c1.computeMonthlyFee();
double after=c1.getBalance();
if(before!=after){
   System.out.print(String.format("Balance before applying the fee =$%.2f%n",before));
   System.out.print(String.format("Balance after applying the fee =$%.2f%n",after));
}
System.out.println(c1);
}
}

class BankAccount {
private int accountNumber;
private double balance;

public BankAccount(int accountNumber, double balance)
{
this.accountNumber = accountNumber;
this.balance=balance;
}

public int getAccountNumber() {return accountNumber;}

public double getBalance() {return balance;}

public void setAccountNumber(int accountNumber) {this.accountNumber = accountNumber;}

public void setBalance(double balance) {this.balance = balance;}

public void deposit(double amount) {
balance = balance + amount;
}

public void withdraw(double amount) {
if (amount <= balance)
balance = balance - amount;
}

public String toString() {
return String.format("Account Number=%d%nBalance=$%.2f%n",accountNumber,balance);
}
}
class CheckingAccount extends BankAccount
{

private int transactionCount=0;
private static final int FREE_TRANSACTIONS = 10;
private static final double TRANSACTION_FEE = 2.0;

public CheckingAccount(int accountNumber, double balance)
{
super(accountNumber, balance);
}

public int getTransactionCount() { return transactionCount;}

public void setTransactionCount(int transactionCount) {
this.transactionCount = transactionCount;

}

public void deposit(double amount) {
   super.deposit(amount);
   transactionCount++;
}

public void withdraw(double amount) {
   super.withdraw(amount);
   transactionCount++;
}

public void computeMonthlyFee() {

   if (transactionCount > FREE_TRANSACTIONS)
   {
   double fees = TRANSACTION_FEE * (transactionCount - FREE_TRANSACTIONS);
   withdraw(fees);
   }

   transactionCount = 0;
}

public String toString() {

return String.format("%sTransaction Count=%d",super.toString(),transactionCount);
}
}