Programming Languages Research Group: Git - IRC.git/blob

   1 // Bank App in Java
   2
   3 // Author: Danish Lakhani
   4
   5 // BankAppServer - Bank Application Server that services one client at a time
   6
   7 import java.io.*;
   8 import java.net.*;
   9 import java.util.*;
  10
  11 class BankAppClientTeller
  12 {
  13         static int SUCCESS = 0;
  14         static int ERROR = 1;
  15
  16         static int LOGIN_ACCOUNT = 1;
  17         static int LOGIN_PIN = 2;
  18
  19         static int ACCOUNT_SAVINGS = 1;
  20         static int ACCOUNT_CHECKING = 2;
  21         static int ACCOUNT_TELLER = 3;
  22
  23         private Socket mySocket = null;
  24         private PrintWriter out = null;
  25         private BufferedReader in = null;
  26         private static int serverPort = 44444;
  27
  28         public BankAppClientTeller()
  29         {
  30         }
  31
  32         private void establishConnection()
  33                 throws IOException
  34         {
  35                 System.out.println("Connecting to server...");
  36                 mySocket = new Socket("localhost", serverPort);
  37                 out = new PrintWriter(mySocket.getOutputStream(), true);
  38                 in = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
  39                 System.out.println("Connection Established!");
  40         }
  41
  42         private void closeConnection()
  43                 throws IOException
  44         {
  45                 if (out != null)
  46                         out.close();
  47                 if (in != null)
  48                         in.close();
  49                 if (mySocket != null)
  50                         mySocket.close();
  51         }
  52
  53         private void displayMenu()
  54         {
  55                 System.out.println("\nBankAppClientTeller");
  56                 System.out.println("----------------");
  57                 System.out.println("1. Login");
  58                 System.out.println("2. Logout");
  59                 System.out.println("3. Deposit");
  60                 System.out.println("4. Withdraw");
  61                 System.out.println("5. Check Balance");
  62                 System.out.println("6. Open Account");
  63                 System.out.println("7. Close Account");
  64                 System.out.println("8. Modify Account");
  65                 System.out.println("9. Check Account Info");
  66                 System.out.println("0. Exit\n");
  67                 System.out.print("Enter Choice: ");
  68                 return;
  69         }
  70
  71         private void startClient()
  72                 throws IOException
  73         {
  74                 int clientQuit = 0;
  75                 int status = SUCCESS;
  76                 int isConnected = 0;
  77                 boolean loggedIn = false;
  78                 BufferedReader local_in = new BufferedReader(new InputStreamReader(System.in));
  79                 while (clientQuit == 0)
  80                 {
  81                         if (!loggedIn)
  82                                 establishConnection();
  83                         isConnected = 1;
  84                         while (isConnected == 1)
  85                         {
  86                                 displayMenu();
  87                                 String input = local_in.readLine();
  88                                 int selection = Integer.parseInt(input);
  89                                 String response;
  90                                 switch (selection)
  91                                 {
  92                                         case 0:
  93                                                 System.out.println("Exitting...");
  94                                                 out.println("EXIT");
  95                                                 System.exit(0);
  96                                                 break;
  97                                         case 1:
  98                                                 System.out.println("Login");
  99                                                 out.println("LOGIN");
 100                                                 response = in.readLine();
 101                                                 if (response.equals("OK"))
 102                                                 {
 103                                                         System.out.print("Enter account number: ");
 104                                                         String accountNumber = local_in.readLine();
 105                                                         System.out.print("Enter PIN: ");
 106                                                         String pinNumber = local_in.readLine();
 107                                                         out.println(accountNumber);
 108                                                         out.println(pinNumber);
 109                                                         response = in.readLine();
 110                                                         if (response.equals(accountNumber))
 111                                                         {
 112                                                                 System.out.println("Login Successful! Account: " + response);
 113                                                                 loggedIn = true;
 114                                                         }
 115                                                         else
 116                                                         {
 117                                                                 System.out.println(response);
 118                                                         }
 119                                                 }
 120                                                 else
 121                                                 {
 122                                                         System.out.println(response);
 123                                                 }
 124                                                 break;
 125                                         case 2:
 126                                                 System.out.println("Logout");
 127                                                 out.println("LOGOUT");
 128                                                 response = in.readLine();
 129                                                 if (response.equals("OK"))
 130                                                 {
 131                                                         response = in.readLine();
 132                                                         System.out.println("Logout Successful! Account: " + response);
 133                                                 }
 134                                                 else
 135                                                 {
 136                                                         System.out.println(response);
 137                                                 }
 138                                                 break;
 139                                         case 3:
 140                                                 System.out.println("Deposit");
 141                                                 out.println("TELLERDEPOSIT");
 142                                                 response = in.readLine();
 143                                                 if (response.equals("OK"))
 144                                                 {
 145                                                         System.out.print("Enter Account Number: ");
 146                                                         String accNum = local_in.readLine();
 147                                                         out.println(accNum);
 148                                                         response = in.readLine();
 149                                                         if (!response.equals("OK"))
 150                                                         {
 151                                                                 System.out.println(response);
 152                                                                 break;
 153                                                         }
 154                                                         System.out.print("Enter Deposit Amount: ");
 155                                                         String depAmount = local_in.readLine();
 156                                                         out.println(depAmount);
 157                                                         response = in.readLine();
 158                                                         if (response.equals("OK"))
 159                                                         {
 160                                                                 response = in.readLine();
 161                                                         }
 162                                                 }
 163                                                 System.out.println(response);
 164                                                 break;
 165                                         case 4:
 166                                                 System.out.println("Withdraw");
 167                                                 out.println("TELLERWITHDRAW");
 168                                                 response = in.readLine();
 169                                                 if (response.equals("OK"))
 170                                                 {
 171                                                         System.out.print("Enter Account Number: ");
 172                                                         String accNum = local_in.readLine();
 173                                                         out.println(accNum);
 174                                                         response = in.readLine();
 175                                                         if (!response.equals("OK"))
 176                                                         {
 177                                                                 System.out.println(response);
 178                                                                 break;
 179                                                         }
 180                                                         System.out.print("Enter Withdrawal Amount: ");
 181                                                         String wdAmount = local_in.readLine();
 182                                                         out.println(wdAmount);
 183                                                         response = in.readLine();
 184                                                         if (response.equals("OK"))
 185                                                         {
 186                                                                 response = in.readLine();
 187                                                         }
 188                                                 }
 189                                                 System.out.println(response);
 190                                                 break;
 191                                         case 5:
 192                                                 System.out.println("Check Balance");
 193                                                 out.println("TELLERCHECK");
 194                                                 response = in.readLine();
 195                                                 if (response.equals("OK"))
 196                                                 {
 197                                                         System.out.print("Enter Account Number: ");
 198                                                         String accNum = local_in.readLine();
 199                                                         out.println(accNum);
 200                                                         response = in.readLine();
 201                                                         if (!response.equals("OK"))
 202                                                         {
 203                                                                 System.out.println(response);
 204                                                                 break;
 205                                                         }
 206                                                         response = in.readLine();
 207                                                 }
 208                                                 System.out.println(response);
 209                                                 break;
 210                                         case 6:
 211                                                 System.out.println("Account Open");
 212                                                 out.println("TELLEROPEN");
 213                                                 response = in.readLine();
 214                                                 if (!response.equals("OK"))
 215                                                 {
 216                                                         System.out.println(response);
 217                                                         break;
 218                                                 }
 219                                                 System.out.print("Enter Account Number: ");
 220                                                 out.println(local_in.readLine());
 221                                                 System.out.print("Enter First Name: ");
 222                                                 out.println(local_in.readLine());
 223                                                 System.out.print("Enter Middle Name: ");
 224                                                 out.println(local_in.readLine());
 225                                                 System.out.print("Enter Last Name: ");
 226                                                 out.println(local_in.readLine());
 227                                                 System.out.print("Enter Account Type: ");
 228                                                 out.println(local_in.readLine());
 229                                                 System.out.print("Enter Initial Balance: ");
 230                                                 out.println(local_in.readLine());
 231                                                 System.out.print("Enter PIN: ");
 232                                                 out.println(local_in.readLine());
 233                                                 response = in.readLine();
 234                                                 if (response.equals("OK"))
 235                                                         response = in.readLine();
 236                                                 System.out.println(response);
 237                                                 break;
 238                                         case 7:
 239                                                 System.out.println("Account Close");
 240                                                 out.println("TELLERCLOSE");
 241                                                 response = in.readLine();
 242                                                 if (!response.equals("OK"))
 243                                                 {
 244                                                         System.out.println(response);
 245                                                         break;
 246                                                 }
 247                                                 System.out.print("Enter Account Number: ");
 248                                                 out.println(local_in.readLine());
 249                                                 response = in.readLine();
 250                                                 if (response.equals("OK"))
 251                                                         response = in.readLine();
 252                                                 System.out.println(response);
 253                                                 break;
 254                                         case 8:
 255                                                 System.out.println("Modify Account");
 256                                                 out.println("TELLERMODIFY");
 257                                                 response = in.readLine();
 258                                                 if (!response.equals("OK"))
 259                                                 {
 260                                                         System.out.println(response);
 261                                                         break;
 262                                                 }
 263                                                 System.out.print("Enter Account Number: ");
 264                                                 String accNum = local_in.readLine();
 265                                                 out.println(accNum);
 266                                                 response = in.readLine();
 267                                                 if (!response.equals("OK"))
 268                                                 {
 269                                                         System.out.println(response);
 270                                                         break;
 271                                                 }
 272                                                 int done = 0;
 273                                                 while (done == 0)
 274                                                 {
 275                                                         System.out.println("1. Change Name");
 276                                                         System.out.println("2. Change Type");
 277                                                         System.out.println("3. Change PIN");
 278                                                         System.out.println("4. Change Balance");
 279                                                         System.out.println("5. Done\n");
 280                                                         System.out.print("Enter Choice: ");
 281                                                         int choice = Integer.parseInt(local_in.readLine());
 282                                                         switch (choice)
 283                                                         {
 284                                                                 case 1:
 285                                                                         out.println("CHANGENAME");
 286                                                                         System.out.print("Enter New First Name: ");
 287                                                                         out.println(local_in.readLine());
 288                                                                         System.out.print("Enter New Middle Name: ");
 289                                                                         out.println(local_in.readLine());
 290                                                                         System.out.print("Enter New Last Name: ");
 291                                                                         out.println(local_in.readLine());
 292                                                                         response = in.readLine();
 293                                                                         if (!response.equals("OK"))
 294                                                                         {
 295                                                                                 System.out.println(response);
 296                                                                         }
 297                                                                         break;
 298                                                                 case 2:
 299                                                                         out.println("CHANGETYPE");
 300                                                                         System.out.print("Enter New Account Type: ");
 301                                                                         out.println(local_in.readLine());
 302                                                                         response = in.readLine();
 303                                                                         if (!response.equals("OK"))
 304                                                                         {
 305                                                                                 System.out.println(response);
 306                                                                         }
 307                                                                         break;
 308                                                                 case 3:
 309                                                                         out.println("CHANGEPIN");
 310                                                                         System.out.print("Enter New PIN: ");
 311                                                                         out.println(local_in.readLine());
 312                                                                         response = in.readLine();
 313                                                                         if (!response.equals("OK"))
 314                                                                         {
 315                                                                                 System.out.println(response);
 316                                                                         }
 317                                                                         break;
 318                                                                 case 4:
 319                                                                         out.println("CHANGEBALANCE");
 320                                                                         System.out.print("Enter New Balance: ");
 321                                                                         out.println(local_in.readLine());
 322                                                                         response = in.readLine();
 323                                                                         if (!response.equals("OK"))
 324                                                                         {
 325                                                                                 System.out.println(response);
 326                                                                         }
 327                                                                         break;
 328                                                                 case 5:
 329                                                                         done = 1;
 330                                                                         out.println("DONE");
 331                                                                         break;
 332                                                                 default:
 333                                                                         System.out.println("Invalid selection");
 334                                                                         break;
 335                                                         }
 336                                                 }
 337                                                 response = in.readLine();
 338                                                 System.out.println(response);
 339                                                 break;
 340                                         case 9:
 341                                                 System.out.println("View Account");
 342                                                 out.println("TELLERVIEW");
 343                                                 response = in.readLine();
 344                                                 if (!response.equals("OK"))
 345                                                 {
 346                                                         System.out.println(response);
 347                                                         break;
 348                                                 }
 349                                                 System.out.print("Enter Account Number: ");
 350                                                 String accNumber = local_in.readLine();
 351                                                 out.println(accNumber);
 352                                                 response = in.readLine();
 353                                                 if (response.equals("OK"))
 354                                                         response = in.readLine();
 355                                                 System.out.println(response);
 356                                                 break;
 357                                         default:
 358                                                 System.out.println("Invalid Selection");
 359                                                 break;
 360                                 }
 361                                 System.out.println("Press Enter to Continue...");
 362                                 local_in.readLine();
 363                         }
 364                 }
 365         }
 366
 367         public static void main(String [] args)
 368                 throws IOException
 369         {
 370                 System.out.println("BankAppClientTeller in Java");
 371                 BankAppClientTeller client = new BankAppClientTeller();
 372                 client.startClient();
 373         }
 374 }