/* Case Study -
Using concepts of object-oriented programming develop solution for banking system having the following operations -
1. Create an account
2. Deposit money
3. Withdraw money
4. Honor daily withdrawal limit
5. Check the balance
6. Display account information
*/
package caseStudy;
import java.util.Scanner;
// class created for storing attributes and methods of account -
class Account {
Scanner sc = new Scanner(System.in);
public String name; // for storing name of account holder
public String date; // for storing the date on which the account was created
public String nationality; // for storing nationality of account holder
public String verifNum; // for storing verification number such as PAN, Aadhar, etc.
public static int AccNumCnt = 0; // account number counter
public int AccID = 1000; // for storing account id
public double balance; // for storing balance
// function to create an account -
public void createAccount() {
System.out.println("Enter your name: ");
name = sc.nextLine(); // get name
System.out.println("Enter date: ");
date = sc.nextLine(); // get date
System.out.println("Enter nationality: ");
nationality = sc.nextLine(); // get nationality
System.out.println("Enter Aadhar/PAN/verification number: ");
verifNum = sc.nextLine(); // get verification number
do {
System.out.println("Basic balance: ");
balance = sc.nextDouble(); // initial deposit (must be minimum Rs.1000)
if (balance < 1000) {
System.out.println("Initial balance should be minimum Rs.1000!");
}
else {
System.out.println("Account created!");
}
} while (balance < 1000);
AccNumCnt++;
AccID = AccNumCnt; // assigns account id automatically
}
// function to deposit money in existing account -
public void depositMoney() {
double depAmt = 0;
System.out.println("Enter amount that you want to deposit: ");
depAmt = sc.nextDouble();
balance = balance + depAmt;
System.out.println("Your new balance is: " + balance);
}
// function to withdraw money from an existing account -
public void withdrawMoney() {
double witAmt = 0;
do {
System.out.println("Enter amount that you want to withdraw: ");
witAmt = sc.nextDouble();
// check if withdrawal amount is less than balance, only proceed if true -
if (witAmt > balance) {
System.out.println("Account balance is less! Cannot withdraw...transaction failed!");
}
} while (witAmt > balance);
balance = balance - witAmt;
System.out.println("Your current balance is: " + balance);
}
// function to check balance of existing account -
public void checkBal() {
System.out.println("Your current balance is: " + balance);
}
// function to display account details -
public void displayAcc() {
System.out.println("Displaying account details: ");
System.out.println("Name: " + name); // displays name
System.out.println("Account Number: " + AccID); // displays account number
System.out.println("Current balance: " + balance); // displays account balance
}
}
// class created for storing attributes and methods of the bank system -
public class BankSystem {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
Account obj = new Account(); // create an object of Account class
// Implementing menu-driven program -
int choice = 0;
System.out.println("WELCOME TO ABC BANK!");
do {
System.out.println("How can we help you today?");
System.out.println("1: Create account ");
System.out.println("2: Deposit money ");
System.out.println("3: Withdraw money ");
System.out.println("4: Check balance ");
System.out.println("5: Display account information ");
System.out.println("6: Exit");
choice = s.nextInt();
switch (choice) {
case 1:
obj.createAccount();
break;
case 2:
obj.depositMoney();
break;
case 3:
obj.withdrawMoney();
break;
case 4:
obj.checkBal();
break;
case 5:
obj.displayAcc();
break;
default:
if (choice != 6) {
System.out.println("Invalid Input!");
}
}
} while (choice != 6);
}
}