Untitled

ANSWER :

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.util.Scanner;

public class Banking {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("Menu: \nEnter 1 for Bank Manager \nEnter 2 for Bank Customer");

int choice = sc.nextInt();

switch(choice){

case 1:

System.out.println("Enter 1 to add info \nEnter 2 to display info");

int infoChoice = sc.nextInt();

sc.nextLine();

while(infoChoice==1 || infoChoice ==2 ){

if(infoChoice == 1){

System.out.println("Enter Customer ID:");

int customerID = sc.nextInt();

sc.nextLine();

System.out.println("Enter Customer Name:");

String name = sc.nextLine();

System.out.println("Enter email address:");

String email = sc.nextLine();

addCustomerInfo(customerID, name, email);

}

  

else if(infoChoice == 2){

displayCustomerInfo();

}

else {

System.out.println("Exiting!");

}

System.out.println("Enter 1 to add info \nEnter 2 to display info or any other digit to exit:");

infoChoice = sc.nextInt();

sc.nextLine();

}

break;

case 2:

System.out.println("Enter your customerID");

int id = sc. nextInt();

sc.nextLine();

BankCustomer customer = new BankCustomer(id);

System.out.println("Enter 1 to deposit amount \nEnter 2 to withdraw \nEnter 3 to digit interest earned");

int customerChoice = sc.nextInt();

sc.nextLine();

while(customerChoice >=1 || customerChoice <= 3){

  

if(customerChoice == 1){

System.out.println("Enter amount to be deposited:");

double depositAmount = sc.nextDouble();

sc.nextLine();

customer.makeDeposit(depositAmount);

}

else if(customerChoice == 2){

System.out.println("Enter amount to be withdrawn:");

double withdraw = sc.nextDouble();

sc.nextLine();

customer.withdrawMoney(withdraw);

}

else if(customerChoice ==3){

System.out.println("Enter accountID:");

int accountID = sc.nextInt();

sc.nextLine();

System.out.println("Interest Earned:" + customer.interestEarned(accountID));

  

}

else {

System.out.println("Exiting!");

}

System.out.println("Enter 1 to deposit amount \nEnter 2 to withdraw \nEnter 3 to check interest earned or any other key to exit:");

customerChoice = sc.nextInt();

sc.nextLine();

}

  

break;

default:

System.out.println("Wrong Choice!");

}

  

}

public static void addCustomerInfo(int customerID, String name, String email){

  

try{

//Creating the File object

FileOutputStream fos=new FileOutputStream("BankCustInfo.txt",true);

String info = "\n"+ String.valueOf(customerID) + "\t" + name + "\t" + email;

byte[] b = info.getBytes();

fos.write(b);

fos.close();

System.out.print("Information added.");

}

catch(Exception e){

e.printStackTrace();

}

}

public static void displayCustomerInfo(){

try{

//Creating the File object

InputStream inputStream = new FileInputStream("BankCustInfo.txt");

  

Scanner sc = new Scanner(inputStream);

//StringBuffer to store the contents

StringBuffer sb = new StringBuffer();

  

while(sc.hasNext()) {

sb.append(sc.nextLine()+"\n");

}

System.out.println(sb);

}

catch(Exception e){

e.printStackTrace();

}

  

}

}

class BankCustomer{

int customerID;

double balance=0.0;

  

BankCustomer(int customerID)

{

this.customerID = customerID;

}

public void makeDeposit(double depositAmount){

balance = balance + depositAmount;

displayCurrentBalance();

}

public void withdrawMoney(double withdrawAmount){

if(withdrawAmount > balance)

System.out.println("Insufficient Balance");

else

balance = balance - withdrawAmount;

displayCurrentBalance();

}

  

public void displayCurrentBalance(){

System.out.println("Current Balance: "+ balance);

}

public double interestEarned(int accountID){

double interest;

int time = 1; // you can change time (given in years)

AccountType accountTyp= new AccountType(accountID);

interest = (balance * accountTyp.interestRate * time) / 100 ;

return interest;

}

static class AccountType{

int accountID;

double interestRate;

String accType;

  

public AccountType(int accountID){

this.accountID = accountID;

if(accountID==1){

accType = "Checking Account";

interestRate = 0.01;

}

else if(accountID == 2){

accType ="Savings Account";

interestRate = 0.02;

}

}

}

}