Question

Instructions

Using the BCException.java and the BankCustomer.java from the first part of the assignment you will implement a driver class called Bank.java to manipulate an ArrayList of BankCustomer objects.

Your code should read bank customers’ information from the user. It will then create a bank customer objects and add them to an arraylist in a sorted fashion (sorted by account number). The arraylist should be sorted in ascending order at all times. The arraylist should not contain null objects at any point. You may NOT add a BankCustomer and then sort the arraylist, you should insert the new element in the appropriate position. The arraylist should not contain duplicate bank customers. For the purpose of this assignments duplicate bank customers are those that have the same account number.

When removing a bank customer you should find the customer using the account number. You will search for the account number and if found, delete the customer from the arraylist. If not found you should display a message saying so and go back to the main menu.

Printing all the bank customers should be done in ascending order, which is the same way that the arraylist is sorted.

Bank.java should not end execution if an exception happens. You should handle exceptions gracefully. Execution should end only when the user decides to exit by selecting 0 from the menu. (50 points)

Your code should display the following menu:

1. Add a bank customer  (50 points)

2. Remove a bank customer (50 points)

3. Print all bank customers (50 points)

0. Exit

The program should end only when the user selects 0 to exit, otherwise the menu should continue to loop executing options as selected by the user. Feel free to use any extra helper/static methods to make your code more efficient and legible. Not required, but you may want to do it for extra credit, as extra credit is given for well-written code.

You should submit the driver class as well as your BankCustomer.java and BCException.java (again) (40 points). If previously, your code allowed for the creation of invalid objects you must review and fix your code or you will get deductions in this assignment as well.

Below is my BankCustomer.java and BCException.java

BankCustomer.java

public class BankCustomer {

private int acctNumber;
private double balance;
private String name;

public BankCustomer(int acctNumber, double balance, String name) throws Exception{
this.setAcctNumber(acctNumber);
this.setBalance(balance);
this.setName(name);
}
  
public BankCustomer(){
this.acctNumber = 10001;
this.balance = 120.0;
this.name = "sample";
}
  
public void setAcctNumber(int acctNumber) throws Exception {
if (acctNumber >= 10001 && acctNumber <= 99999){
this.acctNumber = acctNumber;
}
else{
BCException me = new BCException();
me.setMessage("The account number passed " + acctNumber + " is not valid");
throw (me);
}

}
public void setBalance(double balance) throws Exception {
if (balance >= 100){
this.balance = balance;
}
else {
BCException me = new BCException();
me.setMessage("The amount added " + balance + " should be more than 100");
throw (me);
}

}
public void setName(String name) throws Exception {
if (name.trim().length() >= 5){
this.name = name.trim();
}
else {
BCException me = new BCException();
me.setMessage("The name " + name + " should be atleast 5 non-blank characters");
throw (me);
}

}
public int getAcctNumber() {
return acctNumber;
}

public double getBalance() {
return balance;
}

public String getName() {
return name;
}


}

BCException.java

public class BCException extends Exception{
//one instance variable
private String message;

public void setMessage(String message){
this.message = message;
}

public String getMessage(){
return this.message;
}
}

Please help me create a driver class plus the array requirement that is needed based on the instruction given plus " You should submit the driver class as well as your BankCustomer.java and BCException.java (again) (40 points). If previously, your code allowed for the creation of invalid objects you must review and fix your code or you will get deductions in this assignment as well. " If there is something wrong with my BankCustomer.java or BCException.java please point it out and help me fix it.

Thanks again for helping.

Answer 1

Here is the completed code for this problem. No modifications has been made to BankCustomer class as it looks OK. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

// Bank.java

import java.util.ArrayList;

import java.util.Scanner;

public class Bank {

// method to display the menu

static void menu() {

System.out.println("\n1. Add a bank customer");

System.out.println("2. Remove a bank customer");

System.out.println("3. Print all bank customers");

System.out.println("4. Quit");

}

// method to add a customer in sorted order of account number into an array

// list. returns true if addition is successful, else false

static boolean addCustomer(ArrayList<BankCustomer> customers,

BankCustomer newCustomer) {

// looping and finding the proper position to add

for (int i = 0; i < customers.size(); i++) {

// checking if new customer can be added to index i

if (newCustomer.getAcctNumber() < customers.get(i).getAcctNumber()) {

// adding to index i

customers.add(i, newCustomer);

return true; // success

} else if (newCustomer.getAcctNumber() == customers.get(i)

.getAcctNumber()) {

// duplicate found, returning false

return false;

}

}

// adding to the end, if still not added

customers.add(newCustomer);

return true; // success

}

// method to remove a customer by account number, if exists

static boolean removeCustomer(ArrayList<BankCustomer> customers,

int accountNum) {

for (int i = 0; i < customers.size(); i++) {

if (customers.get(i).getAcctNumber() == accountNum) {

// found, removing current customer

customers.remove(i);

return true; // found and removed

}

}

return false; // not found

}

// method to print customers

static void printCustomers(ArrayList<BankCustomer> customers) {

// displaying heading

System.out.printf("%-15s %-15s %-15s\n", "Customer Name",

"Account Number", "Account Balance");

// looping and printing each customer's name, acc num and balance

for (BankCustomer c : customers) {

System.out.printf("%-15s %-15d $%-14.2f\n", c.getName(),

c.getAcctNumber(), c.getBalance());

}

System.out.println("-----------------------------------------------\n");

}

// main method

public static void main(String[] args) {

// creating an array list of BankCustomer

ArrayList<BankCustomer> accounts = new ArrayList<BankCustomer>();

// scanner to read user input

Scanner scanner = new Scanner(System.in);

int ch = 0;

// looping until ch is 4

do {

// displaying menu

menu();

// inside try with multiple catches block, getting and processing

// user input

try {

System.out.print("Enter your choice: ");

//reading choice

ch = Integer.parseInt(scanner.nextLine());

System.out.println();

if (ch == 1) {

//reading details for bank customer

System.out.print("Enter name: ");

String name = scanner.nextLine();

System.out.print("Enter account number: ");

int accNum = Integer.parseInt(scanner.nextLine());

System.out.print("Enter balance: ");

double balance = Double.parseDouble(scanner.nextLine());

  

//creating a customer, will throw BCException if any detail is invalid

BankCustomer cust = new BankCustomer(accNum, balance, name);

//if no exception occurred, adding to the list and displaying the result

if (addCustomer(accounts, cust)) {

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

} else {

System.out

.println("Customer with same account number already exists!");

}

} else if (ch == 2) {

//fetching an account number, removing customer

System.out.print("Enter account number: ");

int accNum = Integer.parseInt(scanner.nextLine());

if (removeCustomer(accounts, accNum)) {

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

} else {

System.out

.println("Customer with given account number does not exist!");

}

} else if (ch == 3) {

//printing customers

printCustomers(accounts);

}

} catch (BCException e) {

//BCException is occurred

System.out.println(e.getMessage());

} catch (Exception e) {

//exception due to non numeric input

System.out.println("Invalid input!");

}

} while (ch != 4);

}

}

/*OUTPUT*/

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 1

Enter name: Oliver Queen

Enter account number: 11223

Enter balance: 270

Success!

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 3

Customer Name Account Number Account Balance

Oliver Queen 11223 $270.00

--------------------------------------------------

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 1

Enter name: John diggle

Enter account number: 10020

Enter balance: 677

Success!

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 3

Customer Name Account Number Account Balance

John diggle 10020 $677.00

Oliver Queen 11223 $270.00

--------------------------------------------------

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 1

Enter name: Barry Allen

Enter account number: 23456

Enter balance: 100

Success!

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 3

Customer Name Account Number Account Balance

John diggle 10020 $677.00

Oliver Queen 11223 $270.00

Barry Allen 23456 $100.00

--------------------------------------------------

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 1

Enter name: kevin

Enter account number: 1230

Enter balance: 300

The account number passed 1230 is not valid

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 2

Enter account number: 12345

Customer with given account number does not exist!

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 2

Enter account number: 11223

Success!

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 3

Customer Name Account Number Account Balance

John diggle 10020 $677.00

Barry Allen 23456 $100.00

--------------------------------------------------

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: x

Invalid input!

1. Add a bank customer

2. Remove a bank customer

3. Print all bank customers

4. Quit

Enter your choice: 4