Main.java Code
import java.util.*;
import javax.swing.*;
import javax.swing.JOptionPane;
public class Main
{
DebitCard debitCard;
DbHelper dbHelper;
public Main()
{
debitCard = new DebitCard();
dbHelper = new DbHelper();
}
public static void main(String[] args)
{
Main mn = new Main();
mn.initLoginGUI();
}
public void initLoginGUI()
{
String card_n;
int pin;
boolean i =false;
do
{
card_n=JOptionPane.showInputDialog(null,"WELCOME TO MY ATM \nPlease enter card No: ", "My ATM", JOptionPane.INFORMATION_MESSAGE);
pin=Integer.parseInt(JOptionPane.showInputDialog(null,"Please enter PIN: ", "My ATM", JOptionPane.INFORMATION_MESSAGE));
dbHelper.loadData();
if(card_n.equals(dbHelper.card_No) && pin==dbHelper.card_pin)
{
JOptionPane.showMessageDialog(null,"Log in Successfully", "My ATM", JOptionPane.INFORMATION_MESSAGE);
initServicesGUI();
}
else
{
JOptionPane.showMessageDialog(null,"Invalid Card No or wrong Pin Code", "Error Message ", JOptionPane.ERROR_MESSAGE);
i=true;
}
}
while(i);
}
public void initServicesGUI()
{
while(true)
{
int usr_choice=Integer.parseInt(JOptionPane.showInputDialog(null,"Please enter \n1 for 'Deposit Amount'\n2 for 'Withdraw Amount'\n3 for 'Check Balance'\n4 for 'Exit the Program'\n ", "My ATM", JOptionPane.INFORMATION_MESSAGE));
try
{
switch(usr_choice)
{
case 1 :
depositAmoount();
break;
case 2 :
cashWithdraw();
break;
case 3 :
checkBalance();
break;
case 4 :
showDeveloperInfo();
System.exit(0);
default :
JOptionPane.showMessageDialog(null,"Sorry ! Invalid choice ", "Error Message ", JOptionPane.ERROR_MESSAGE);
}
}
catch (NumberFormatException e)
{
System.out.println("Error occured " + e);
}
}
}
public void depositAmoount()
{
try
{
long amount=Integer.parseInt(JOptionPane.showInputDialog(null,"Please enter money to deposit\n(Amount must be multiple of 500 and upto maximum Rs. 25000/- per transaction.", "Deposit Amount", JOptionPane.INFORMATION_MESSAGE));
if(amount%500==0 && amount>0 && amount<=25000)
{
long up_amount=dbHelper.acc_balance + amount;
dbHelper.saveData(up_amount);
JOptionPane.showMessageDialog(null,"$"+ amount+ " hase been deposited successfully", "Message", JOptionPane.INFORMATION_MESSAGE);
dbHelper.loadData();
}
else
{
JOptionPane.showMessageDialog(null,"Amount must be multiple of 500 and upto maximum Rs. 25000/- per transaction.", "Message", JOptionPane.INFORMATION_MESSAGE);
}
}
catch (NumberFormatException e)
{
System.out.println("Error occured " + e);
}
}
public void cashWithdraw()
{
long amount=Integer.parseInt(JOptionPane.showInputDialog(null,"Please enter money to Withdraw\n(Amount must be multiple of 500 and upto maximum Rs. 25000/- per transaction.", "Withdraw Cash", JOptionPane.INFORMATION_MESSAGE));
try
{
if(amount%500==0 && amount>0 && amount<=25000)
{
long up_amount=dbHelper.acc_balance - amount;
if(up_amount>=0)
{
dbHelper.saveData(up_amount);
JOptionPane.showMessageDialog(null,"$"+ amount+ " hase been withdrawn successfully", "Message", JOptionPane.INFORMATION_MESSAGE);
dbHelper.loadData();
}
else
{
JOptionPane.showMessageDialog(null,"There is not enough amount to withdraw", "Message", JOptionPane.INFORMATION_MESSAGE);
}
}
else
{
JOptionPane.showMessageDialog(null,"Amount must be multiple of 500 and upto maximum Rs. 25000/- per transaction.", "Message", JOptionPane.INFORMATION_MESSAGE);
}
}
catch (NumberFormatException e)
{
System.out.println("Error occured " + e);
}
}
public void checkBalance()
{
JOptionPane.showMessageDialog(null,"Your current balance is : $" + dbHelper.acc_balance , "Check Balance", JOptionPane.INFORMATION_MESSAGE);
}
public void showDeveloperInfo()
{
JOptionPane.showMessageDialog(null,"Developed by : VU ACADEMY (BC090402315)", "Developer Info", JOptionPane.INFORMATION_MESSAGE);
}
}
DebitCard.java Code
import java.util.*;
import javax.swing.*;
public class DebitCard
{
private String cardNo;
private int pin;
private long balance;
public DebitCard()
{
this.cardNo="";
this.pin=0;
this.balance=0;
}
public DebitCard(String c_no, int p, long b)
{
this.cardNo=c_no;
this.pin=p;
this.balance=b;
}
public DebitCard(DebitCard d)
{
this.cardNo=d.cardNo;
this.pin=d.pin;
this.balance=d.balance;
}
public void setcardNo(String c_no)
{
this.cardNo=c_no;
}
public void setpin(int p)
{
this.pin=p;
}
public void setbalance(long b)
{
this.balance=b;
}
public String getcardNo()
{
return this.cardNo;
}
public int getpin()
{
return this.pin;
}
public long getbalance()
{
return this.balance;
}
}
DbHelper.java Code
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.*;
import javax.swing.*;
import javax.swing.JOptionPane;
public class DbHelper
{
private static String FILE_NAME = "BC090402315.txt";
String card_No;
int card_pin;
long acc_balance;
public void loadData()
{
String tokens[]=null;
try
{
FileReader Freader = new FileReader(FILE_NAME);
BufferedReader Breader = new BufferedReader(Freader);
String line = Breader.readLine();
tokens = line.split(",");
card_No = tokens[0];
card_pin = Integer.parseInt(tokens[1]);
acc_balance = Long.parseLong(tokens[2]);
Breader.close();
Freader.close();
}
catch (Exception e)
{
System.out.println("Error occured " + e);
}
}
public void saveData(long acc_b)
{
try
{
FileWriter fw = new FileWriter(FILE_NAME);
PrintWriter pw = new PrintWriter(fw);
pw.println(card_No+","+card_pin+","+acc_b);
pw.flush();
pw.close();
fw.close();
}
catch (Exception e)
{
System.out.println("Error occured " + e);
}
}
}
