ROBUSTA - Githubissues

We have added new features and made some modifications to improve the program's robustness to reduce the error rates.

Here's the program with added new features.

package Fundamentals;
import java.util.Scanner;

public class CryptoBank {
    private static final int MAX_ACCOUNTS = 11; // edited also this from 'MAX_ACCOUNTS = 10' because the creation of accounts in array starts from 1 and skip index 0 but the computer will always count index 0 to solve the problem we just need to add 1 on maxAccount.
    private static String[] accountNames = new String[MAX_ACCOUNTS];
    private static int[] accountNumbers = new int[MAX_ACCOUNTS];
    private static double[] balances = new double[MAX_ACCOUNTS];
    private static int accountCount = 1;

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int choice;

        System.out.println("Welcome to ALT Crypto Bank!");

        do {
            System.out.println("\t[1.] Create New Account");
            System.out.println("\t[2.] Deposit Money");
            System.out.println("\t[3.] Withdraw Money");
            System.out.println("\t[4.] Check Balance");
            System.out.println("\t[5.] Exit");
            System.out.print("Enter your choice: ");
            choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    createNewAccount(scanner);
                    break;
                case 2:
                    performTransaction(scanner, true); // true for deposit
                    break;
                case 3:
                    performTransaction(scanner, false); // false for withdraw
                    break;
                case 4:
                    checkBalance(scanner);
                    break;
                case 5:
                    System.out.println("Thank you for using ALT Crypto Bank!");
                    break;
                default:
                    System.out.println("Invalid choice. Please enter a valid option.");
            }
        } while (choice != 5);

        scanner.close();
    }
// CASE 1: Creating new account
    private static void createNewAccount(Scanner scanner) {
        if (accountCount >= MAX_ACCOUNTS) {
            System.out.println("Maximum account limit reached.");
            return;
        }

        System.out.print("Enter Account Name: ");
        String accountName = scanner.next();

        accountNames[accountCount] = accountName;
        accountNumbers[accountCount] = accountCount ; 
        balances[accountCount] = 0.0;

        System.out.println("Account created successfully. Your account number is: " + accountCount);
        accountCount++; // moving the incrementation after the display.
    }
    // I have added a feature here...
    private static void performTransaction(Scanner scanner, boolean isDeposit) {
        System.out.print("Enter Account Number: ");
        int accountNumber; // edited this
        // conditional statement  for scanner to know if the inputted account number is in integer otherwise will prompt again to menu.
        if(scanner.hasNextInt()) {
            accountNumber = scanner.nextInt();
        } else {
                System.out.println("Invalid input, please enter integers only.");
                scanner.next();  // consume the invalid input
                return;
            }// till here.

        if (accountNumber < 0 || accountNumber >= accountCount) {
            System.out.println("Invalid account number.");
            return;
        }
    // also here......
        System.out.print("Enter Amount: ");
        double amount; // edited this
//from here...
        if(scanner.hasNextDouble()) {
            amount = scanner.nextDouble();
        }else {
            System.out.println("Invalid input, please enter integers only");
            scanner.next(); // consume the invalid input
            return;
        } // to here.....

        if (isDeposit) {
            balances[accountNumber] += amount;
            System.out.println("Amount deposited successfully. Current Balance: " + balances[accountNumber]);
        } else {
            if (amount <= balances[accountNumber]) {
                balances[accountNumber] -= amount;
                System.out.println("Amount withdrawn successfully. Remaining Balance: " + balances[accountNumber]);
            } else {
                System.out.println("Insufficient balance or invalid amount.");
            }
        }
    }

    private static void checkBalance(Scanner scanner) {
        System.out.print("Enter Account Number: ");
        int accountNumber = scanner.nextInt();

        if (accountNumber < 0 || accountNumber >= accountCount) {
            System.out.println("Invalid account number.");
            return;
        }

        System.out.println("Account Name: " + accountNames[accountNumber] + " - Current Balance: " + balances[accountNumber]);
    }
}

Changes:

line 5: added 1 more value to MAX_ACCOUNTS to create exactly 10 bank accounts.

line 60: in the createNewAccount method, I have changed unnecessary modifications in the value of the account like "-1" on accountCount, We just simplified it by moving the incrementation after the display.

line 67-78(performTranscation method): We added a simple feature that tracks if the user's input is in integer, otherwise prompts the user back to the menu.

Scanner.hasNextInt() - this will check if the next token or the user’s input is integer.
- Scanner.next(); for the computer to read and discards the next token or in this case the invalid input. This is used to clear the input buffer when an error or the input is invalid because without consuming the invalid input, the program might get stuck in a loop trying to read the same invalid input again and again.

line 88-93: We added the same feature.

Kindly test and debug the program. Feel free to comment if there are some errors or bugs so we can fix it immediately. THAAANKKKS!

flexycode / CCPRGG1L_ACTIVITY_COM23P

ROBUSTA #10

Here's the program with added new features.

Changes:

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