-
Notifications
You must be signed in to change notification settings - Fork 0
/
ATM.java
415 lines (364 loc) · 12.2 KB
/
ATM.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
/**
*
* @author John Mock
*/
import java.util.Scanner;
import java.util.StringTokenizer;
import java.io.*;
import java.text.DecimalFormat;
import java.util.Random;
/**
* PROJECT COMPLETED (5/8/18 @ 9:25 PM)
*/
public class ATM {
static DecimalFormat moneyFormatter = new DecimalFormat("$" + "#,###,###.##");
static File accountsdb;
static Scanner accountsdbReader;
static Scanner userInput = new Scanner(System.in);
/*
* Creates new account
*
*
*
*/
public static ATMAccount createAccount() {
String userName;
double userBalance;
int digit = -1;
System.out.println("Please enter a name for the account: ");
userInput.nextLine();
userName = userInput.nextLine();
//Requests digits 1 by 1 for the pin number
String accPin = "";
for (int i = 1; i < 5; i++) {
digit = -1;
System.out.println("Please enter digit #" + i + " of" + "your pin.");
do {
digit = userInput.nextInt();
} while (digit < 0 || digit > 9);
accPin += digit;
}
System.out.println("Please put the amount of money you would like to " + "initially deposit into the account: ");
userBalance = userInput.nextDouble();
Random accountIDGenerator = new Random();
int userID = accountIDGenerator.nextInt(2147483647);
ATMAccount account = new ATMAccount(userID, userName, Integer.parseInt(accPin), userBalance);
System.out.println("Acount Information: \n"+account.toString());
return account;
}
//Presents user with action options
//ATMAccount account - passes the account either created previously or logged in
public static void userChoice(ATMAccount account) throws FileNotFoundException, IOException, InterruptedException{
int selection = 0;
do {
System.out.println("Please select one of the following: " + "\n1 = Request ID \n2 = Balance Inquiry"
+ "\n3 = Deposit Money\n4 = Withdraw Money " + " \n5 = Go Back to Start Screen"+
"\n6 = Exit");
selection = userInput.nextInt();
switch (selection) {
case 1:
System.out.println("Requesting ID number...");
System.out.println("Account ID: "+ account.getID());
break;
case 2:
System.out.println("Your balance is: " + moneyFormatter.format(account.getBalance()));
break;
case 3:
depositMoney(account);
break;
case 4:
withdrawMoney(account);
break;
case 5:
ATMStartScreen();
break;
case 6:
System.exit(0);
break;
default:
System.out.println("What are you doing mate?");
break;
}
} while (selection != 5);
}
//Simulates an ATM Idle Screen i.e. before a credit card is inserted
public static void ATMStartScreen() throws FileNotFoundException, IOException, InterruptedException {
System.out.println("Welcome to Maze Bank Automated Teller Machine!");
System.out.println("1 = Open a new account." + "\n2 = Log In to a current account." + "\n3 = Exit.");
int select = 0;
do {
select = userInput.nextInt();
switch (select) {
case 1:
ATMAccount accountNew = createAccount();
parseAccountDB(accountNew);
userChoice(accountNew);
break;
case 2:
ATMAccount accountExisting = LogIn();
userChoice(accountExisting);
break;
case 3:
System.exit(0);
break;
default:
break;
}
} while (select != 3);
}
//Processes a log in with the account ID that a user enters
public static ATMAccount LogIn() throws FileNotFoundException, IOException, InterruptedException {
ATMAccount account = null;
System.out.println("Enter your account ID:");
int intaccID;
intaccID = userInput.nextInt();
String accID = intaccID + "";
String[] dataGrabbed = new String[4];
File thisFile = new File("accountsdb.txt");
accountsdbReader = new Scanner(thisFile);
if (thisFile.exists()) {
while (accountsdbReader.hasNextLine()) {
String accountIDHolder = accountsdbReader.findInLine(accID);
if (accountIDHolder == null) {
accountsdbReader.nextLine();
} else if (accountIDHolder.equals(accID)) {
for (int i = 1; i < dataGrabbed.length; i++) {
if (accountsdbReader.hasNext())
dataGrabbed[i] = accountsdbReader.next();
}
} else if ((!(accountsdbReader.hasNextLine()) && account == null)) {
System.out.println("This account does not exist!");
ATMStartScreen();
}
dataGrabbed[0] = accID;
}
int validationLoop = 3;
String pinValidity;
userInput.nextLine();
do {
System.out.println("Please enter your 4 digit pin in order to access your account:");
pinValidity = userInput.nextLine();
if (pinValidity.equals(dataGrabbed[3])) {
System.out.println("PIN Confirmed!");
System.out.println("Displaying account options...");
account = new ATMAccount(Integer.parseInt(dataGrabbed[0]), dataGrabbed[1],
Integer.parseInt(dataGrabbed[3]), Double.parseDouble(dataGrabbed[2]));
return account;
} else {
System.out.println("PIN Declined!");
System.out.println("You have " + validationLoop + " attempts remaining.");
}
validationLoop--;
} while (!pinValidity.equals(dataGrabbed[3]) && validationLoop != -1);
System.out.println("You have exhausted all of your attempts you will now return to the main menu.");
} else {
// Return to StartScreen before being able to return null account
System.out.println("File was not found!");
System.out.println("Returning to main menu...");
ATMStartScreen();
}
System.out.println("Returning to main menu...");
ATMStartScreen();
return null;
}
//Enters account information into accountsdb.txt
public static void parseAccountDB(ATMAccount accountNew) throws FileNotFoundException, IOException {
try {
FileWriter fileWriter = new FileWriter("accountsdb.txt", true);
BufferedWriter fileBuffer = new BufferedWriter(fileWriter);
PrintWriter fileOutput = new PrintWriter(fileBuffer);
fileOutput.println(accountNew.parseString());
if (fileOutput != null) {
fileOutput.close();
}
if (fileBuffer != null) {
fileBuffer.close();
}
if (fileWriter != null) {
fileWriter.close();
}
} catch (Exception e) {
System.out.println("Error!");
}
}
//Deposit function for balance manipulation
public static void depositMoney(ATMAccount account) throws FileNotFoundException {
accountsdb = new File("accountsdb.txt");
//Use of two dimensional array to account for line number
String[][] accountInfo = null;
if (accountsdb.exists()) {
accountsdbReader = new Scanner(accountsdb);
int y = 0;
while (accountsdbReader.hasNextLine()) {
y++;
accountInfo = new String[y][4];
accountsdbReader.nextLine();
}
accountsdbReader.close();
}
double depositAmount;
do {
System.out.println("Enter the amount you want to deposit:");
depositAmount = userInput.nextDouble();
if (depositAmount < 0) {
System.out.println("You cannot deposit a negative amount!");
}
} while (depositAmount < 0);
account.setDeposit(depositAmount);
System.out.println("Your deposit has been made.");
System.out.println(accountInfo.length);
String s = "";
if (accountsdb.exists()) {
int y = 0;
accountsdbReader = new Scanner(accountsdb);
while (accountsdbReader.hasNextLine()) {
s = accountsdbReader.nextLine();
StringTokenizer spl = new StringTokenizer(s, " ");
for (int x = 0; x != 4; x++) {
accountInfo[y][x] = spl.nextToken();
}
y++;
}
}
/** VALIDATION PROOF
* System.out.println("Line #1" + "\n Index #0: " + accountInfo[0][0] + "\t Index #1: " + accountInfo[0][1]
* + "\t Index #2: " + accountInfo[0][2] + "\t Index #3: " + accountInfo[0][3]);
* System.out.println("Line #2" + "\n Index #0: " + accountInfo[1][0] + "\t Index #1: " + accountInfo[1][1]
* + "\t Index #2: " + accountInfo[1][2] + "\t Index #3: " + accountInfo[1][3]);
* System.out.println("Line #3" + "\n Index #0: " + accountInfo[2][0] + "\t Index #1: " + accountInfo[2][1]
* + "\t Index #2: " + accountInfo[2][2] + "\t Index #3: " + accountInfo[2][3]);
* System.out.println("Line #4" + "\n Index #0: " + accountInfo[3][0] + "\t Index #1: " + accountInfo[3][1]
* + "\t Index #2: " + accountInfo[3][2] + "\t Index #3: " + accountInfo[3][3]);
*
*/
int line = -1;
try {
int accID;
for (int y = 0; y != accountInfo.length; y++) {
accID = Integer.parseInt(accountInfo[y][0]);
if (accID == account.getID())
line = y;
}
accountInfo[line][2] = "" + account.getBalance();
System.out.println("Depositing...");
System.out.println("New Balance: " + accountInfo[line][2]);
} catch (Exception e) {
System.out.println("Account was not found in database array!");
}
try {
PrintWriter scrubFile = new PrintWriter(accountsdb);
scrubFile.write("");
scrubFile.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
FileWriter fileWriter = new FileWriter(accountsdb, true);
BufferedWriter fileBuffer = new BufferedWriter(fileWriter);
PrintWriter fileOutput = new PrintWriter(fileBuffer);
for (int i = 0; i != accountInfo.length; i++) {
fileOutput.println(accountInfo[i][0] + " " + accountInfo[i][1] + " " + accountInfo[i][2] + " "
+ accountInfo[i][3]);
}
if (fileOutput != null) {
fileOutput.close();
}
if (fileBuffer != null) {
fileBuffer.close();
}
if (fileWriter != null) {
fileWriter.close();
}
} catch (Exception e) {
e.printStackTrace();
}
accountsdbReader.close();
}
//Withdraw function for balance manipulation
public static void withdrawMoney(ATMAccount account) throws FileNotFoundException {
// File initialization
accountsdb = new File("accountsdb.txt");
// #ADDED THE 2-D ARRAY
String[][] accountInfo = null;
if (accountsdb.exists()) {
accountsdbReader = new Scanner(accountsdb);
int y = 0;
while (accountsdbReader.hasNextLine()) {
y++;
accountInfo = new String[y][4];
accountsdbReader.nextLine();
}
accountsdbReader.close();
}
double withdrawAmount;
do {
System.out.println("Enter the amount you want to withdraw:");
withdrawAmount = userInput.nextDouble();
if (account.getBalance() < 0 || withdrawAmount > account.getBalance()) {
System.out.println("Insufficient balance!");
} else {
account.setWithdraw(withdrawAmount);
}
} while (withdrawAmount < 0);
String s = "";
if (accountsdb.exists()) {
int y = 0;
accountsdbReader = new Scanner(accountsdb);
while (accountsdbReader.hasNextLine()) {
s = accountsdbReader.nextLine();
StringTokenizer spl = new StringTokenizer(s, " ");
for (int x = 0; x != 4; x++) {
accountInfo[y][x] = spl.nextToken();
}
y++;
}
}
int line = -1;
try {
int accID;
for (int y = 0; y != accountInfo.length; y++) {
accID = Integer.parseInt(accountInfo[y][0]);
if (accID == account.getID())
line = y;
}
accountInfo[line][2] = "" + account.getBalance();
System.out.println("Withdrawing...");
System.out.println("New Balance: " + accountInfo[line][2]);
} catch (Exception e) {
e.printStackTrace();
;
}
try {
PrintWriter scrubFile = new PrintWriter(accountsdb);
scrubFile.write("");
scrubFile.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
FileWriter fileWriter = new FileWriter(accountsdb, true);
BufferedWriter fileBuffer = new BufferedWriter(fileWriter);
PrintWriter fileOutput = new PrintWriter(fileBuffer);
for (int i = 0; i != accountInfo.length; i++) {
fileOutput.println(accountInfo[i][0] + " " + accountInfo[i][1] + " " + accountInfo[i][2] + " "
+ accountInfo[i][3]);
}
if (fileOutput != null) {
fileOutput.close();
}
if (fileBuffer != null) {
fileBuffer.close();
}
if (fileWriter != null) {
fileWriter.close();
}
} catch (IOException e) {
e.printStackTrace();
}
accountsdbReader.close();
}
//Main method initializes ATMStartScreen method
public static void main(String[] args) throws FileNotFoundException, IOException, InterruptedException {
ATMStartScreen();
}
}