I'm new to Java... I've and have been reading a java for dummies bookJava for Dummies and other ones tooas well. II've started building this program like a week ago. I'm sure it's very messy.. Just seeing if someone can clean it up and show easier ways of doing things... I I have like 4 classes, but i'llI'll just post the main class and a subclass for now.
This is an ATM program...
Here is my BankMainBankMain class...
import java.util.ArrayList;
import java.util.Scanner;
public class BankMain
{
private double availableBal =80;
private double totalBal =100;
static ArrayList<Integer> cardNum = new ArrayList<Integer>();
static Scanner input = new Scanner(System.in);
private String error; //String the error from the exception
{
error = "error";
}
public static void cardNumbers(){
Scanner input = new Scanner(System.in);
try{
System.out.println("Please select a 5 digit card number");
int num = input.nextInt();
checkNumber(num);
}
catch(invalidNumber err){
System.out.println("Caught Error: " + err.getError());
contC();
}
}
public static void contC(){
Scanner keyboard = new Scanner(System.in);
System.out.println("Type 'c' to enter number again.");
String value = keyboard.next();
if(value.equalsIgnoreCase("c")){
cardNumbers();
}
else if (!keyboard.equals('c')){
System.out.println("Invalid Entry!");
}
}
public static void menu(){
System.out.println("ATM Menu:");
System.out.println();
System.out.println("1 = Create Account");
System.out.println("2 = Account Login");
System.out.println("3 = Exit ATM");
query();
}
public void startAtm()
{
menu();
}
public void drawMainMenu()
{
AccountMain main3 = new AccountMain();
int selection;
System.out.println("\nATM main menu:");
System.out.println("1 - View account balance");
System.out.println("2 - Withdraw funds");
System.out.println("3 - Add funds");
System.out.println("4 - Back to Account Menu");
System.out.println("5 - Terminate transaction");
System.out.print("Choice: ");
selection = input.nextInt();
switch(selection)
{
case 1:
viewAccountInfo();
break;
case 2:
withdraw();
break;
case 3:
addFunds();
break;
case 4:
AccountMain.selectAccount();
break;
case 5:
System.out.println("Thank you for using this ATM!!! goodbye");
}
}
public void viewAccountInfo()
{
System.out.println("Account Information:");
System.out.println("\t--Total balance: $"+totalBal);
System.out.println("\t--Available balance: $"+availableBal);
drawMainMenu();
}
public void deposit(int depAmount)
{
System.out.println("\n***Please insert your money now...***");
totalBal =totalBal +depAmount;
availableBal =availableBal +depAmount;
}
public void checkNsf(int withdrawAmount)
{
if(totalBal -withdrawAmount < 0)
System.out.println("\n***ERROR!!! Insufficient funds in you accout***");
else
{
totalBal =totalBal -withdrawAmount;
availableBal =availableBal -withdrawAmount;
System.out.println("\n***Please take your money now...***");
}
}
public void addFunds()
{
int addSelection;
System.out.println("Deposit funds:");
System.out.println("1 - $20");
System.out.println("2 - $40");
System.out.println("3 - $60");
System.out.println("4 - $100");
System.out.println("5 - Back to main menu");
System.out.print("Choice: ");
addSelection =input.nextInt();
switch(addSelection)
{
case 1:
deposit(20);
drawMainMenu();
break;
case 2:
deposit(40);
drawMainMenu();
break;
case 3:
deposit(60);
drawMainMenu();
break;
case 4:
deposit(100);
drawMainMenu();
break;
case 5:
drawMainMenu();
break;
}
}
public void withdraw()
{
try{
int withdrawSelection;
System.out.println("Withdraw money:");
System.out.println("1 - $20");
System.out.println("2 - $40");
System.out.println("3 - $60");
System.out.println("4 - $100");
System.out.println("5 - Back to main menu");
System.out.print("Choice: ");
withdrawSelection =input.nextInt();
switch(withdrawSelection)
{
case 1:
checkAmount(20);
drawMainMenu();
break;
case 2:
checkAmount(40);
drawMainMenu();
break;
case 3:
checkAmount(60);
drawMainMenu();
break;
case 4:
checkAmount(100);
drawMainMenu();
break;
case 5:
drawMainMenu();
break;
default:
System.out.println("Invalid choice.");
withdraw();
}
}
catch(invalidAmount err){
System.out.println("Caught Error: " + err.getError());
viewAccountInfo();
}
}
public static void query(){
Scanner keyboard = new Scanner(System.in);
while (!keyboard.hasNextInt()) {
System.out.println("Invalid choice.");
menu();
}
int input = keyboard.nextInt();
if (input == 2){
BankMainPart2 main2 = new BankMainPart2();
System.out.println("Please enter your 5 digit card number.");
BankMainPart2.loginCard(cardNum);
}
else if (input == 1){
cardNumbers();
}
else if (input == 3){
System.out.println("Thank you, have a nice day!");
System.exit(0);
}
}
private static void checkNumber(int num) throws invalidNumber
//run the check activation exception
{
Scanner keyboard = new Scanner(System.in);
if(String.valueOf(num).length()!=5)
{
throw new invalidNumber("invalid number");
}
else {
cardNum.add(num);
System.out.println("Thank you! You're card number is " +num);
contC2();
}
}
private void checkAmount(int withdrawAmount) throws invalidAmount
//run the check activation exception
{
if(totalBal -withdrawAmount < 0)
{
throw new invalidAmount("\n***ERROR!!! Insufficient funds in you accout***");
}
else
{
totalBal =totalBal -withdrawAmount;
availableBal =availableBal -withdrawAmount;
System.out.println("\n***Please take your money now...***");
}
}
public static void contC2(){
Scanner keyboard = new Scanner(System.in);
System.out.println("Type 'c' to return to main menu.");
String value = keyboard.next();
if(value.equalsIgnoreCase("c")){
menu();
}
else if (!keyboard.equals('c')){
System.out.println("Invalid Entry!");
contC2();
}
}
public static void main(String args[])
{
BankMain myAtm = new BankMain();
BankMainSub sub = new BankMainSub();
myAtm.startAtm();
}
}
public class BankMainSub extends BankMain {
private double availableBal3 =500;
private double totalBal3 =520;
public void businessAccount()
{
int selection;
System.out.println("\nATM main menu:");
System.out.println("1 - View account balance");
System.out.println("2 - Withdraw funds");
System.out.println("3 - Add funds");
System.out.println("4 - Back to Account Menu");
System.out.println("5 - Terminate transaction");
System.out.print("Choice: ");
selection = input.nextInt();
switch(selection)
{
case 1:
viewAccountInfo3();
break;
case 2:
withdraw3();
break;
case 3:
addFunds3();
break;
case 4:
AccountMain.selectAccount();
break;
case 5:
System.out.println("Thank you for using this ATM!!! goodbye");
default:
System.out.println("Invalid choice.");
businessAccount();
}
}
public void addFunds3()
{
int addSelection;
System.out.println("Deposit funds:");
System.out.println("1 - $20");
System.out.println("2 - $40");
System.out.println("3 - $60");
System.out.println("4 - $100");
System.out.println("5 - Back to main menu");
System.out.print("Choice: ");
addSelection = input.nextInt();
switch(addSelection)
{
case 1:
deposit2(20);
businessAccount();
break;
case 2:
deposit2(40);
businessAccount();
break;
case 3:
deposit2(60);
businessAccount();
break;
case 4:
deposit2(100);
businessAccount();
break;
case 5:
businessAccount();
break;
}
}
public void withdraw3()
{
int withdrawSelection;
System.out.println("Withdraw money:");
System.out.println("1 - $20");
System.out.println("2 - $40");
System.out.println("3 - $60");
System.out.println("4 - $100");
System.out.println("5 - Back to main menu");
System.out.print("Choice: ");
withdrawSelection =input.nextInt();
switch(withdrawSelection)
{
case 1:
checkNsf3(20);
businessAccount();
break;
case 2:
checkNsf3(40);
businessAccount();
break;
case 3:
checkNsf3(60);
businessAccount();
break;
case 4:
checkNsf3(100);
businessAccount();
break;
case 5:
businessAccount();
break;
}
}
public void viewAccountInfo3()
{
System.out.println("Account Information:");
System.out.println("\t--Total balance: $"+totalBal3);
System.out.println("\t--Available balance: $"+availableBal3);
businessAccount();
}
public void deposit2(int depAmount)
{
System.out.println("\n***Please insert your money now...***");
totalBal3 =totalBal3 +depAmount;
availableBal3 =availableBal3 +depAmount;
}
public void checkNsf3(int withdrawAmount)
{
if(totalBal3 -withdrawAmount < 0)
System.out.println("\n***ERROR!!! Insufficient funds in you accout***");
else
{
totalBal3 =totalBal3 -withdrawAmount;
availableBal3 =availableBal3 -withdrawAmount;
System.out.println("\n***Please take your money now...***");
}
}
}
Here is AccountMainAccountMain...
import java.util.Scanner;
public class AccountMain {
public static void selectAccount(){
System.out.println("Which account would you like to access?");
System.out.println();
System.out.println("1 = Business Account ");
System.out.println("2 = Savings Account");
System.out.println("3 = Checkings Account");
System.out.println("4 = Return to Main Menu");
menuAccount();
}
public static void menuAccount(){
BankMain main = new BankMain();
BankMainSub sub = new BankMainSub();
BankMainPart3 main5 = new BankMainPart3();
Scanner account = new Scanner(System.in);
while (!account.hasNextInt()) {
System.out.println("Invalid choice.");
selectAccount();
}
int actNum = account.nextInt();
if (actNum == 1){
System.out.println("*Business Account*");
sub.businessAccount();
}
else if (actNum == 2){
System.out.println("*Savings Account*");
main.drawMainMenu();
}
else if (actNum == 3){
System.out.println("*Checkings Account*");
main5.checkingsAccount();
}
else if (actNum == 4){
BankMain.menu();
}
}
}
