Question

Java Programing 1 - 24206-CSC325-0

Project 3

Date Due: 2/28/2020

Bank Account – Part 2

Modify the Bank Account class you created to have the following additional functionality

• When the object is created, it should create two types of account
  • Checking and Saving ( you can user Boolean variables to identify between these accounts)
  • Initialize balance on both accounts to $0
  • The constructor calls a method called setAccountPassWord()

setAccountPassWord ()

1. This method asks the user to enter a pin number.
2. It checks to make sure the Pin number is between 4-8 digit numerical value
3. It calls another method called encryptData()
4. the value return from enCryptData is stored as the user security pin number.

enCryptData()

1. This method takes integer value as its argument
2. It encrypts the integer value using mod21 encryption security.
3. Returns the encrypted value to calling function.

Example

                                                12345 %21 - this returns 18 which is the remainder

                          

       656564 % 21 – this returns 20 which is the remainder

Add the following additional methods

Withdraw ()

1. Asks for security pin.
2. Checks if pin entered matches the user security
   1. If not, continue to ask user for security pin until valid pin is entered.
3. Asks if withdraw from checking account or saving account
4. Checks If withdraw amount is less than balance
5. Withdraws the amount, and updates account balance

Deposit()

1. Asks for security pin.
2. Checks if pin entered matches the user security
   1. If not, continue to ask user for security pin until valid pin is entered.
3. Asks if withdraw from checking account or saving account
4. Updates account balance with new balance

Transfer()

1.         Asks for security pin.
2. Checks if pin entered matches the user security
   1. If not, continue to ask user for security pin until valid pin is entered.
3. Asks from and to account to transfer money (checking to saving or saving to checking_
4. Updates both accounts balance

DisplayBalance()

1. Asks for security pin.
2. Checks if pin entered matches the user security
   1. If not, continue to ask user for security pin until valid pin is entered.
3. Prints the account balance on both checking and Saving

Test your code with the followings

1. Create an account called myAccount
   1. Call DisplayBalance()
2. Deposit $100 in saving account
3. Deposit $150 in checking account
   1. Display Balance
4. Transfer $50 from saving account into checking account
   1. Display balance
5. Try to withdraw $200 from your saving account and see what happens.   You must properly display code and inform the end user if there is not funding in the account                  
6. Withdraw $25 from saving account

     Display Balance

               

Answer 1

/* Comment are placed for all functions and variables to help explain the code.

Main class consists of the main function that is used for testing our code.

Scanner class is used to take input from user.   */

//importing the necessary files and packages
import java.util.Scanner;
import java.io.*;
import java.util.*;

//This is the class account that form 2 accounts -savings account and checking account
class Account{
private int savingsBalance; //stores the savings account balance
private int checkingBalance; //stores the checkings account balance
private int securityPin; //stores the encrypted security pin

int encryptData(int n) //encrypt a number to mod21 form
{
return n%21;
}

int setAccountPassword() //used to set password when account is created (called by constructor)
{
Scanner s = new Scanner(System.in);
System.out.println("Enter new pin number:");
String pin = s.nextLine();
if(pin.length()>=4&&pin.length()<=8)
{
   for(int i=0;i<pin.length();i++)
   if(!(pin.charAt(i)>='0'&&pin.charAt(i)<='9'))
   return setAccountPassword();
}
else
{
return setAccountPassword();
}
return encryptData(Integer.parseInt(pin));
}

Account() // Account class constructor
{
savingsBalance = 0;
checkingBalance = 0;
securityPin = setAccountPassword();
}

void withdraw() // withdraw an amount from savings or checkings account. Display error for insufficient balance.
{
System.out.println("********* WITHDRAW AMOUNT *********");
Scanner s = new Scanner(System.in);
System.out.println("Enter account pin number:");
String pin = s.nextLine();
if(encryptData(Integer.parseInt(pin))!=securityPin)
withdraw();
System.out.println("press 1 to withdraw from savings account or 2 to withdraw from checking account");   
int option = s.nextInt();
if(option == 1) //withdraw from savings account
{
System.out.println("Enter amount to withdraw:");
int amount = s.nextInt();
if(savingsBalance>=amount)
{
   savingsBalance-=amount;
   System.out.println("Total amount of "+amount+" is withdrawn from savings account");
}
else
{
System.out.println("Insufficient balance to withdraw amount of "+amount+" from savings account");
}
}
else //withdraw from checkings account
{
System.out.println("Enter amount to withdraw:");
int amount = s.nextInt();
if(checkingBalance>=amount)
{
   checkingBalance-=amount;
   System.out.println("Total amount of "+amount+" is withdrawn from checking account");
}
else
{
System.out.println("Insufficient balance to withdraw amount of "+amount+" from checking account");
}
}
}

void deposit() // deposit an amount to savings or checkings account
{
System.out.println("********* DEPOSIT AMOUNT *********");
Scanner s = new Scanner(System.in);
System.out.println("Enter account pin number:");
String pin = s.nextLine();
if(encryptData(Integer.parseInt(pin))!=securityPin)
deposit();
System.out.println("press 1 to deposit to savings account or 2 to deposit to checking account");   
int option = s.nextInt();
System.out.println("Enter amount to deposit:");
int amount = s.nextInt();
if(option == 1) //deposit to savings account
{
  
   savingsBalance+=amount;
   System.out.println("Total amount of "+amount+" is deposited to savings account");
}
else //deposit to checking account
{
   checkingBalance+=amount;
   System.out.println("Total amount of "+amount+" is deposited to checking account");
}
}

void transfer() // transfer an amount from checking to savings or from savings to checking
{
System.out.println("********* TRANSFER AMOUNT *********");
Scanner s = new Scanner(System.in);
System.out.println("Enter account pin number:");
String pin = s.nextLine();
if(encryptData(Integer.parseInt(pin))!=securityPin)
transfer();
System.out.println("press 1 to transfer from checking to savings or 2 to transfer from savings to checking");   
int option = s.nextInt();
if(option==1)// transfer an amount from checking to savings
{
System.out.println("Enter amount to transfer from checking to savings:");
int amount = s.nextInt();
if(checkingBalance>=amount)
{
   checkingBalance-=amount;
savingsBalance+=amount;
   System.out.println("Total amount of "+amount+" is transferred from checking account to savings account");
}
else
{
System.out.println("Insufficient balance to transfer amount of "+amount+" from checking account to savings account");
}
}
else// transfer an amount from savings to checking
{
System.out.println("Enter amount to transfer from savings to checking:");
int amount = s.nextInt();
if(savingsBalance>=amount)
{
savingsBalance-=amount;
   checkingBalance+=amount;
   System.out.println("Total amount of "+amount+" is transferred from savings account to checking account");
}
else
{
System.out.println("Insufficient balance to transfer amount of "+amount+" from savings account to checking account");
}
}
}

void displayBalance() //Display balances of both savings and checking account
{
System.out.println("********* DISPLAY BALANCE *********");
Scanner s = new Scanner(System.in);
System.out.println("Enter account pin number:");
String pin = s.nextLine();
if(encryptData(Integer.parseInt(pin))!=securityPin)
displayBalance();
System.out.println("Savings account balance: "+savingsBalance);
System.out.println("checking account balance: "+checkingBalance);
}

}

//Testing our code
class Main{

   public static void main(String args[])
   {
   Account acc= new Account(); //creating the account
   acc.displayBalance();
   acc.deposit();
   acc.deposit();
   acc.displayBalance();
   acc.transfer();
   acc.displayBalance();
   acc.withdraw();
   acc.withdraw();
   acc.displayBalance();
   }
}