cashclientpublic class cashclient extends Object
| Fields Summary |
|---|
| public static final int | DEF_PORT | | public static final String | DEF_HOST | | public static String | host | | private int | port | | static String | accno | | static String | pinno | | static int | option | | static Socket | soc | | static PrintWriter | outStream | | static BufferedReader | inStream | | static DataInputStream | userin |
| Constructors Summary |
|---|
public cashclient()
System.out.println("\n\nEnter host name(e.g. usun22)-");
try
{
//reads host name entered by user
host = userin.readLine();
}
//if host name is unreadable, terminate program
catch(IOException inputhost)
{
System.out.println("Error reading host name");
System.out.println("Exiting.........");
System.exit(0);
}
//if no host entered assume host = local host
if(host.length() < 1)
{
host=DEF_HOST;
}
try
{
//create a socket connection using host name and server's port number
soc = new Socket(host, DEF_PORT);
//create an input and output stream for new connection
outStream = new PrintWriter(new OutputStreamWriter(soc.getOutputStream()));
inStream = new BufferedReader(new InputStreamReader(soc.getInputStream()));
}
catch(IOException iesoc)
{
System.out.println("Error - initialisation failed");
System.out.println("Exiting.........");
System.exit(0);
}
|
| Methods Summary |
|---|
| public void | build_and_send()
//initialise local variables
String user_amount = " ";
float useramount = -1;
String request = " ";
//begin building message
request=accno + " ";
request=request.concat(pinno) + " ";
//build rest of message based on user's request in main_menu()
switch(option)
{
//requests balance
case 1:
{
//complete message for balance request
request=request.concat("b");
break;
}
//requests withdrawal
case 2:
{
//loop while invaild amount entered
while(useramount<0)
{
try
{
System.out.println("\nEnter Amount to Withdraw - ");
try
{
//read in amount user wants to withdraw
user_amount = userin.readLine();
//convert string to int for validation
useramount = Float.valueOf(user_amount).floatValue();
}
//caught if amount could not be read
catch(IOException ex5)
{
System.out.println("Error - Could not read amount to withdraw");
}
}
//caught if user amount entered is invalid type
catch(NumberFormatException nfe3)
{
useramount = -1;
}
//if amount invalid, display message to user
if(useramount<0)
{
System.out.println("\nInvalid amount - please re-enter");
try
{
Thread.sleep(1500);
}
catch(InterruptedException iesleep)
{
System.out.println("Error - couldn't activate Sleep");
}
}
}//end of while
//complete message for withdraw request
request=request.concat("w" + " " + user_amount);
break;
}
//requests deposit
case 3:
{
//loop while invaild amount entered
while(useramount<0)
{
try
{
System.out.println("\nEnter Amount to Deposit - ");
try
{
//read in amount user wants to deposit
user_amount = userin.readLine();
//convert string to int for validation
useramount = Float.valueOf(user_amount).floatValue();
}
//caught if amount could not be read
catch(IOException ex5)
{
System.out.println("Error - Could not read amount to withdraw");
}
}
//caught if user amount entered is invalid type
catch(NumberFormatException nfe3)
{
useramount = -1;
}
//if amount invalid ,display message to user
if(useramount<0)
{
System.out.println("Invalid amount - please re-enter");
try
{
Thread.sleep(1500);
}
catch(InterruptedException iesleep)
{
System.out.println("Error - couldn't activate Sleep");
}
}//end of if useramount<0
}//end of while
//complete message for withdraw request
request=request.concat("d" + " " + user_amount);
break;
}
}//end of switch(option)
//send request to server
outStream.println(request);
//flush output stream
outStream.flush();
| | public void | input_user_data()
int cont=0;
//display opening title
System.out.println("\nWelcome to the Virtual Bank v1.0");
System.out.println("--------------------------------");
try
{
//wait 1500ms
Thread.sleep(1500);
}
catch(InterruptedException iesleep)
{
System.out.println("Error - couldn't activate Sleep");
}
//while do not continue to next stage,loop
while(cont==0)
{
cont = 1;
try
{
System.out.println("\nPlease Enter Account no. - ");
try
{
//read in account no. from user
accno = userin.readLine();
//convert string to int
int acc_no = Integer.valueOf(accno).intValue();
//if account no. is invalid account no. do not continue
if(accno.length()!=6)
{
cont=0;
}
}
//caught if account no. could not be read,terminates program
catch(IOException ex2)
{
System.out.println("Error - Could not read account no.");
System.out.println("Exiting..........");
System.exit(0);
}
System.out.println("\nPlease Enter PIN no. - ");
try
{
//read in pin no. from user input
pinno = userin.readLine();
//convert string to int
int pin_no = Integer.valueOf(pinno).intValue();
//if user input less than or greater than 4 digits do not continue
if(pinno.length()!=4)
{
cont=0;
}
}
catch(IOException ex3)
{
System.out.println("Error - Could not read pin no.");
System.out.println("Exiting.......");
System.exit(0);
}
}//end ot try for numberformatexception
catch(NumberFormatException nfe1)
{
cont = 0;
}
if(cont==0)
{
System.out.println("\nError - incorrect entry");
System.out.println("\nPlease try again");
try
{
Thread.sleep(1500);
}
catch(InterruptedException iesleep2)
{
System.out.println("Error - couldn't activate Sleep");
}
}
}//end of while(cont==0)
| | public static void | main(java.lang.String[] args)
//creates instance of cashclient
cashclient user_interface = new cashclient();
//loop forever
while(true)
{
//calls object to read in account no. and pin no. of account user wants to query
user_interface.input_user_data();
option = 0;
//while option doesn't equal return card,loop
while(option!=4)
{
//displays main menu
user_interface.menu();
if(option!=4)
{
//builds message and sends
user_interface.build_and_send();
//displays transaction status message(if it was successful or not)
user_interface.receive_and_process();
}
else
{
System.out.println("\nPlease Take your Card");
}
try
{
//waits 1500ms
Thread.sleep(1500);
}
catch(InterruptedException ie)
{
System.out.println("Error with sleep ");
}
}//end of while(option!=4)
}//end of while(true)
| | public void | menu()
option = 0;
//while option is not a vaild option loop
while(option!=1 && option!=2 && option!=3 && option!=4)
{
//display main menu
System.out.println("\n\n----------------------");
System.out.println("Main Menu");
System.out.println("----------------------");
System.out.println("1 - Display Balance");
System.out.println("2 - Withdrawal");
System.out.println("3 - Deposit");
System.out.println("4 - Return Card");
System.out.println("\nPlease Enter option - ");
try
{
//read users choice from user input
String choice = userin.readLine();
try
{
//convert string to integer for vaildiating
option = Integer.valueOf(choice).intValue();
}
//caught if option entered is not an integer
catch(NumberFormatException nfe2)
{
option = 0;
}
}
//caught if choice could not be read in,terminates program
catch(IOException ex4)
{
System.out.println("Error - Could not read option no.");
System.out.println("Exiting");
System.exit(0);
}
//displays invaild option message if option not equal to 1,2,3 or 4
if(option!=1 && option!=2 && option!=3 && option!=4)
{
System.out.println("\nInvalid selection - please try again!");
try
{
//wait 1500ms
Thread.sleep(1500);
}
catch(InterruptedException iesleep)
{
System.out.println("Error - couldn't activate Sleep");
}
}//end of if option!=1,2,3,4
}//end of while option !=1,2,3,4
| | public void | receive_and_process()
//initialise local variable
StringTokenizer reply_st= null;
String reply = " ";
//get reply from server and display it
try
{
//wait for message to be received
reply = inStream.readLine();
}
//caught if message could not be read
catch(IOException ioinStream)
{
System.out.println("Error - due to Server not responding");
System.out.println("Exiting.......");
System.exit(0);
}
try
{
//break up message to get first char
reply_st = new StringTokenizer(reply);
}
catch(NullPointerException ne1)
{
System.out.println("Server not responding");
System.out.println("Exiting....");
System.exit(0);
}
String reply_s = reply_st.nextToken();
char reply_type = reply_s.charAt(0);
//process reply
switch(reply_type)
{
//displays balance
case 'b":
{
//gets balance amount from message
String replyamount = reply_st.nextToken();
//converts string amount to float amount
float reply_amount = Float.valueOf(replyamount).floatValue();
//defines local region
Locale local = new Locale("en","US");
//displays balance in form of local currency
System.out.println("\nYour current balance is " + NumberFormat.getCurrencyInstance().format(reply_amount));
break;
}
//acknowledges successful deposit
case 'd":
{
System.out.println("\nDeposit transaction successful");
break;
}
//acknowledges successful withdrawal
case 'w":
{
System.out.println("\nWithdrawal transaction Successful");
System.out.println("Please take your cash");
break;
}
//informs user pin no. didn't match for given account no.
case 'i":
{
System.out.println("\nIncorrect PIN code entered!!");
option = 4;
break;
}
//informs user withdrawal transaction failed due to lack of funds
case 'o":
{
System.out.println("\nWithdrawal transaction not sucessful - due to lack of funds!");
break;
}
}//end of switch
try
{
//waits for 1500ms
Thread.sleep(1500);
}
catch(InterruptedException iesleep)
{
System.out.println("Error - couldn't activate Sleep");
}
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