Bank

import java.util.Scanner;

public class Bank {
    double balance;
    double previousTransaction;
    String customerName;
    String customerID;

    public Bank(String customerName, String customerID){
        this.customerName = customerName;
        this.customerID = customerID;
    }

    public void deposit(double amount){
        if (amount != 0) {
            balance += amount;
            previousTransaction = amount;
        }
    }
    public void withdraw(double amount){
        if (amount > balance){
            System.out.println("Not enough money in account to withdraw");
        }
        balance -= amount;
        previousTransaction = -amount;
    }
    public void getpreviousTransaction(){
        if (previousTransaction > 0){
            System.out.println("Deposited: " + previousTransaction);
        }
        else if (previousTransaction < 0){
            System.out.println("Withdrawn: " + Math.abs(previousTransaction));
        }
        else{
            System.out.println("No transcation was made");
        }
    }
    public void showMenu() {
        char option = '\0';
        Scanner scanner = new Scanner(System.in);

        System.out.println("Welcome " + customerName);
        System.out.println("Your ID is: " + customerID);
        System.out.println("\n");
        System.out.println("Please select your options below");
        System.out.println("A. Check balance");
        System.out.println("B. Deposit");
        System.out.println("C. Withdraw");
        System.out.println("D. Previous transaction");
        System.out.println("E. Exit");

    do{
        System.out.println("================================================================================");
        System.out.println("Enter an option");
        System.out.println("================================================================================");
        option = scanner.next().charAt(0);
        System.out.println("\n");

        switch (option){
            case 'A':
                System.out.println("-----------------------------------");
                System.out.println("Balance: " + balance);
                System.out.println("-----------------------------------");
                System.out.println("\n");
                break;

            case 'B':
                System.out.println("-----------------------------------");
                System.out.println("Enter an amount to deposit: ");
                System.out.println("-----------------------------------");
                double amount = scanner.nextDouble();
                deposit(amount);
                System.out.println("\n");
                break;

            case 'C':
                System.out.println("-----------------------------------");
                System.out.println("Enter an amount to withdraw: ");
                System.out.println("-----------------------------------");
                double amount2 = scanner.nextDouble();
                withdraw(amount2);
                System.out.println("\n");
                break;
            case 'D':
                System.out.println("-----------------------------------");
                getpreviousTransaction();
                System.out.println("-----------------------------------");
                System.out.println("\n");
                break;

            case 'E':
                System.out.println("-----------------------------------");
                break;

            default:
                System.out.println("Invalid option, please choose again");
                break;
        }
    } while(option != 'E');

        System.out.println("Thank you for using Phan banking! Come again!");
    }

    public static void main(String[] args){
        Bank Datsbank = new Bank("Dat","Phanx289");
        Datsbank.showMenu();
    }

}