Write an abstract class titled \"YourLastName_BankAccount\" to hold the followin
ID: 3568622 • Letter: W
Question
Write an abstract class titled "YourLastName_BankAccount" to hold the following data for a bank account:
The class should have the following methods in addition to the regular access methods for the instance variables (set/get):
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 withdrawal. The method should subtract the argument from the balance. It should also increment the variable holding the number of withdrawals.
calcInterest: 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 calclnterest method, and then sets the variables that hold the number of withdrawals, number of deposits, and monthly service charges to zero.
Next, design a SavingsAccount class that extends the BankAccount class. The SavingsAccount 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 number 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.)
Create a driver which will create one instance each of the previous two classes and tests them. Create a loop so that the user is repeatedly asked for which account they would like to access, and then is prompted for which action they would like to perform, withdraw, deposit, calculate interest, or monthly processing. For each selection, the program prints out the result or an informative error message if there is a problem (ex. trying to withdraw more than the account balance). The program should continue looping, even if there is a problem, exit the loop when data entered for the bank account type start with characters "q" or "Q". Don't print out an error message in this case, just immediately exit the program.
The following shows an example interaction captured in a file by the command
Explanation / Answer
Program Code:
//BankAccount.java
public class BankAccount
{
double balance;
int number_of_deposits;
int number_of_withdrawals;
double annual_interest_rate;
double monthly_service_charges;
static int depCount=0, withCount=0;
public BankAccount(double bal, double rate)
{
balance=bal;
annual_interest_rate=rate;
number_of_withdrawals=0;
number_of_deposits=0;
monthly_service_charges=0;
}
public void setBalance(double bal)
{
balance=bal;
}
public void setInterestRate(double rate)
{
annual_interest_rate=rate;
}
public void setNumOfWithDraws(int numwith)
{
number_of_withdrawals=numwith;
}
public void setNumOfDeposits(int numdepo)
{
number_of_deposits=numdepo;
}
public void setServiceCharge(double servcharge)
{
monthly_service_charges=servcharge;
}
public double getBalance()
{
return balance;
}
public double getInterestRate()
{
return annual_interest_rate;
}
public int getNumOfWithDraws()
{
return number_of_withdrawals;
}
public int getNumOfDeposits()
{
return number_of_deposits;
}
public double getServiceCharge()
{
return monthly_service_charges;
}
public void deposite(double bal)
{
balance+=bal;
depCount++;
}
public void withDraw(double bal)
{
balance-=bal;
withCount++;
}
public double calcInterest()
{
double monthly_interest_rate = (annual_interest_rate / 12);
double monthly_interest = balance * monthly_interest_rate;
balance = balance + monthly_interest;
return balance;
}
public void monthlyProcess(double mServiceCharge)
{
balance=balance-mServiceCharge;
calcInterest();
setNumOfDeposits(0);
setNumOfWithDraws(0);
setServiceCharge(0);
}
}
------------------------------------------------------------------------
//SavingsAccount.java
public class SavingsAccount extends BankAccount
{
boolean status=false;
public SavingsAccount(double bal, double rate)
{
super(bal, rate);
}
public void setStatus(boolean b)
{
status=b;
}
public boolean getStatus()
{
return status;
}
public boolean status()
{
if(super.getBalance()<=25.00)
{
status=false;
System.out.println("Savings account is inactive.");
}
else
{
status=true;
System.out.println("Savings account is active.");
}
return status;
}
public void withdraw(double bal)
{
boolean st=status();
if(st)
{
if(super.getBalance()<bal)
{
System.out.println("Sorry! no enough funds");
}
else
{
super.withDraw(bal);
}
}
else
{
System.out.println("Sorry! Not enough funds.");
}
}
public void deposit(double bal)
{
boolean s=status();
if(s)
{
super.deposite(bal);
setStatus(true);
}
else
{
double amount=super.getBalance()+bal;
setStatus(true);
super.setBalance(amount);
}
}
public void monthlyProcess()
{
int n=super.getNumOfWithDraws();
if(n<4)
{
monthlyProcess(1);
if(super.getBalance()<=25.00)
{
setStatus(false);
}
}
}
}
--------------------------------------------------------------------
// jl_BankDriver.java
import java.util.*;
public class jl_BankDriver
{
public static void main(String args[])
{
Scanner input=new Scanner(System.in);
double amount;
String type;
String transac;
SavingsAccount saveAcc=new SavingsAccount(0,7.2);
System.out.println("Which account would you like to access, regular or savings?: ");
type=input.next();
do{
System.out.println("What action do you wish to perform");
System.out.println("(Withdraw, deposit, monthlyprocessing)?: ");
transac=input.next();
if(transac.equalsIgnoreCase("Deposit"))
{
System.out.println("Enter amount to "+transac);
amount=input.nextDouble();
saveAcc.deposit(amount);
System.out.println("Account balance is : $"+saveAcc.getBalance());
}
else if(transac.equalsIgnoreCase("Withdraw"))
{
System.out.println("Enter amount to "+transac);
amount=input.nextDouble();
saveAcc.withdraw(amount);
System.out.println("Account balance is : $"+saveAcc.getBalance());
}
else if(transac.equalsIgnoreCase("monthlyprocessing"))
{
System.out.println("Account balance is : $"+saveAcc.getBalance());
}
else
{
System.out.println("Sorry! Cannot read the transaction.");
}
System.out.println("Which account would you like to access, regular or savings?: ");
type=input.next();
}while(!type.equalsIgnoreCase("Quit"));
}
}
----------------------------------------------------------------------------------
Sample output:
Which account would you like to access, regular or savings?:
regular
What action do you wish to perform
(Withdraw, deposit, monthlyprocessing)?:
deposit
Enter amount to deposit
200
Savings account is inactive.
Account balance is : $200.0
Which account would you like to access, regular or savings?:
savings
What action do you wish to perform
(Withdraw, deposit, monthlyprocessing)?:
withdraw
Enter amount to withdraw
100
Savings account is active.
Account balance is : $100.0
Which account would you like to access, regular or savings?:
savings
What action do you wish to perform
(Withdraw, deposit, monthlyprocessing)?:
withdraw
Enter amount to withdraw
50
Savings account is active.
Account balance is : $50.0
Which account would you like to access, regular or savings?:
savings
What action do you wish to perform
(Withdraw, deposit, monthlyprocessing)?:
withdraw
Enter amount to withdraw
30
Savings account is active.
Account balance is : $20.0
Which account would you like to access, regular or savings?:
access
What action do you wish to perform
(Withdraw, deposit, monthlyprocessing)?:
monthlyprocessing
Account balance is : $20.0
Which account would you like to access, regular or savings?:
savings
What action do you wish to perform
(Withdraw, deposit, monthlyprocessing)?:
deposti
Sorry! Cannot read the transaction.
Which account would you like to access, regular or savings?:
savings
What action do you wish to perform
(Withdraw, deposit, monthlyprocessing)?:
deposit
Enter amount to deposit
100
Savings account is inactive.
Account balance is : $120.0
Which account would you like to access, regular or savings?:
regular
What action do you wish to perform
(Withdraw, deposit, monthlyprocessing)?:
monthlyprocessing
Account balance is : $120.0
Which account would you like to access, regular or savings?:
savings
What action do you wish to perform
(Withdraw, deposit, monthlyprocessing)?:
deposit
Enter amount to deposit
100
Savings account is active.
Account balance is : $220.0
Which account would you like to access, regular or savings?:
Quit
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