| Name | Topic |
|---|---|
| Arjun C Santhosh | Users and credential json files with validation checks |
| Arjun C Santhosh | User Balance writing and Reading from json |
| Arjun C Santhosh | Layout Design |
| Madhav Harikumar | Transaction page and history |
| Madhav Harikumar | Login Page |
| Madhav Harikumar | User Profile page |
The Internet and Mobile Banking System project aims to develop a secure and user-friendly platform that allows customers to conveniently access and manage their banking services using the internet and mobile devices.
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileWriter;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import java.io.FileReader;
import java.io.IOException;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
/**
* A simple banking system user interface.
*/
public class BankingSystemUI extends JFrame {
private String username;
private List<String> transactionHistory;
private List<LocalDateTime> transactionTimes;
private Double balance;
private JButton transactionButton; // Added to enable/disable
/**
* The entry point of the application.
*
* @param args the command-line arguments
*/
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
BankingSystemUI ui = new BankingSystemUI();
ui.createLoginPage();
});
}
/**
* Initializes a new instance of the {@code BankingSystemUI} class.
*/
public BankingSystemUI() {
transactionHistory = new ArrayList<>();
transactionTimes = new ArrayList<>();
// balance = 5000000.0; // Initial balance of $5 million
}
/**
* Creates the login page UI.
*/
private void createLoginPage() {
// Set frame properties
setTitle("Banking System - Login");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
// Create components
JLabel usernameLabel = new JLabel("Username:");
JTextField usernameField = new JTextField(20);
JLabel passwordLabel = new JLabel("Password:");
JPasswordField passwordField = new JPasswordField(20);
JButton loginButton = new JButton("Login");
// Create layout
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(4, 2));
panel.add(usernameLabel);
panel.add(usernameField);
panel.add(passwordLabel);
panel.add(passwordField);
panel.add(loginButton);
// Add action listener for the login button
loginButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String enteredUsername = usernameField.getText();
String enteredPassword = passwordField.getText();
// System.out.println(enteredPassword);
// Perform user and password validation here
if (authenticateUser(enteredUsername, enteredPassword)) {
username = enteredUsername;
UserJSONHandler handler = new UserJSONHandler();
// System.out.println(username);
balance = handler.getBankBalanceByUsername(username);
createAccountOverviewPage();
} else {
JOptionPane.showMessageDialog(BankingSystemUI.this, "Invalid username or password.");
usernameField.setText("");
passwordField.setText("");
}
}
});
// Set panel as content pane
setContentPane(panel);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
/**
* Validates the user's credentials.
*
* @param username the entered username
* @param password the entered password
* @return {@code true} if the user is valid, {@code false} otherwise
*/
public boolean authenticateUser(String username, String password) {
String filePath = "./credentials.json";
JSONParser parser = new JSONParser();
try (FileReader fileReader = new FileReader(filePath)) {
// Parse the JSON file
JSONObject jsonObject = (JSONObject) parser.parse(fileReader);
// Get the "users" array from the JSON object
JSONArray usersArray = (JSONArray) jsonObject.get("users");
// Loop through each user in the array
for (Object userObj : usersArray) {
JSONObject user = (JSONObject) userObj;
// Get the username and password for the current user
String storedUsername = (String) user.get("username");
String storedPassword = (String) user.get("password");
// Compare the provided username and password with the stored ones
if (storedUsername.equals(username) && storedPassword.equals(password)) {
return true; // Authentication successful
}
}
return false; // Authentication failed (no matching user found)
} catch (IOException | ParseException e) {
e.printStackTrace();
return false;
}}
/**
* Creates the account overview page UI.
*/
private void createAccountOverviewPage() {
getContentPane().removeAll();
setTitle("Banking System - Account Overview");
// Create components
JLabel welcomeLabel = new JLabel("Welcome, " + username + "!");
transactionButton = new JButton("Make a Transaction"); // Made it a field
JButton userProfileButton = new JButton("User Profile");
JButton logoutButton = new JButton("Logout");
JButton checkBalanceButton = new JButton("Check Balance");
JButton viewTransactionHistoryButton = new JButton("View Transaction History");
// Create layout
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(6, 1));
panel.add(welcomeLabel);
panel.add(transactionButton);
panel.add(userProfileButton);
panel.add(logoutButton);
panel.add(checkBalanceButton);
panel.add(viewTransactionHistoryButton);
// Add action listener for the transaction button
transactionButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// Navigate to the transaction page
createTransactionPage();
}
});
// Add action listener for the user profile button
userProfileButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// Navigate to the user profile page
createUserProfilePage();
}
});
// Add action listener for the logout button
logoutButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// Perform logout operations here
// You can navigate back to the login page
createLoginPage();
}
});
// Add action listener for the "Check Balance" button
checkBalanceButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.out.println(balance);
// Show the current balance
JOptionPane.showMessageDialog(BankingSystemUI.this,
"Current Balance: $" + String.format("%.2f", balance),
"Account Balance", JOptionPane.INFORMATION_MESSAGE);
}
});
// Add action listener for the "View Transaction History" button
viewTransactionHistoryButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// Show the transaction history
showTransactionHistory();
}
});
// Set panel as content pane and set background color
panel.setBackground(new Color(240, 240, 240));
setContentPane(panel);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
/**
* Creates the transaction page UI.
*/
private void createTransactionPage() {
getContentPane().removeAll();
setTitle("Banking System - Make a Transaction");
// Create components
JLabel amountLabel = new JLabel("Amount:");
JTextField amountField = new JTextField(10);
JLabel receiverNameLabel = new JLabel("Receiver Name:");
JTextField receiverNameField = new JTextField(20);
JLabel receiverPhoneLabel = new JLabel("Receiver Phone:");
JTextField receiverPhoneField = new JTextField(15);
JButton confirmButton = new JButton("Confirm");
JButton cancelButton = new JButton("Cancel");
// Create layout
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(6, 1));
panel.add(amountLabel);
panel.add(amountField);
panel.add(receiverNameLabel);
panel.add(receiverNameField);
panel.add(receiverPhoneLabel);
panel.add(receiverPhoneField);
panel.add(confirmButton);
panel.add(cancelButton);
// Add action listener for the confirm button
confirmButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// Perform transaction here
// Display success or failure message
String amount = amountField.getText();
String receiverName = receiverNameField.getText();
String receiverPhone = receiverPhoneField.getText();
if (!Objects.requireNonNull(amount).isEmpty() && !Objects.requireNonNull(receiverName).isEmpty()
&& !Objects.requireNonNull(receiverPhone).isEmpty()) {
double transactionAmount = Double.parseDouble(amount);
if (transactionAmount <= balance) {
if (isPhoneNumberValid(receiverPhone)) {
balance -= transactionAmount;
UserJSONHandler handler = new UserJSONHandler();
handler.updateBankBalance(username, balance);
transactionHistory.add("Transaction: -$" + amount + " to " + receiverName);
transactionTimes.add(LocalDateTime.now());
JOptionPane.showMessageDialog(BankingSystemUI.this, "Transaction successful!");
} else {
JOptionPane.showMessageDialog(BankingSystemUI.this, "Invalid receiver phone number. Please enter a 10-digit phone number.");
}
} else {
JOptionPane.showMessageDialog(BankingSystemUI.this, "Insufficient balance.");
}
} else {
JOptionPane.showMessageDialog(BankingSystemUI.this, "Please enter valid amount, receiver name, and receiver phone number.");
}
// Navigate back to the account overview page
createAccountOverviewPage();
}
});
// Add action listener for the cancel button
cancelButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// Navigate back to the account overview page
createAccountOverviewPage();
}
});
// Set panel as content pane and set background color
panel.setBackground(new Color(240, 240, 240));
setContentPane(panel);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
/**
* Creates the user profile page UI.
*/
private void createUserProfilePage() {
getContentPane().removeAll();
setTitle("Banking System - User Profile");
// Get user details based on the logged-in username
String name = this.username;
String email = this.username + "@gmail.com";
// Create components
JLabel profileLabel = new JLabel("User Profile");
JLabel nameLabel = new JLabel("Name: " + name);
JLabel emailLabel = new JLabel("Email: " + email);
JButton backButton = new JButton("Back");
// Create layout
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(5, 1));
panel.add(profileLabel);
panel.add(nameLabel);
panel.add(emailLabel);
panel.add(backButton);
// Add action listener for the back button
backButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// Navigate back to the account overview page
createAccountOverviewPage();
}
});
// Set panel as content pane and set background color
panel.setBackground(new Color(240, 240, 240));
setContentPane(panel);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
/**
* Displays the transaction history.
*/
private void showTransactionHistory() {
StringBuilder message = new StringBuilder("Transaction History:\n");
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
for (int i = 0; i < transactionHistory.size(); i++) {
String transaction = transactionHistory.get(i);
LocalDateTime transactionTime = transactionTimes.get(i);
String formattedTime = transactionTime.format(formatter);
message.append(formattedTime).append(" - ").append(transaction).append("\n");
}
JOptionPane.showMessageDialog(this, message.toString(), "Transaction History", JOptionPane.INFORMATION_MESSAGE);
}
/**
* Validates the receiver's phone number.
*
* @param phoneNumber the receiver's phone number
* @return {@code true} if the phone number is valid, {@code false} otherwise
*/
private boolean isPhoneNumberValid(String phoneNumber) {
return phoneNumber.matches("\\d{10}");
}
}
class UserJSONHandler {
private String filePath = "users.json";
// Read the JSON file and return the JSONObject representing the data
private JSONObject readJSONFile() {
JSONParser parser = new JSONParser();
try (FileReader fileReader = new FileReader(filePath)) {
return (JSONObject) parser.parse(fileReader);
} catch (IOException | ParseException e) {
e.printStackTrace();
return null;
}
}
// Write the updated JSONObject back to the JSON file
private void writeJSONFile(JSONObject jsonObject) {
try (FileWriter fileWriter = new FileWriter(filePath)) {
fileWriter.write(jsonObject.toJSONString());
} catch (IOException e) {
e.printStackTrace();
}
}
// Get the bank balance of a specific user by their username
public Double getBankBalanceByUsername(String username) {
JSONObject jsonObject = readJSONFile();
if (jsonObject != null) {
JSONArray usersArray = (JSONArray) jsonObject.get("users");
for (Object userObj : usersArray) {
JSONObject user = (JSONObject) userObj;
String storedUsername = (String) user.get("username");
if (storedUsername.equals(username)) {
return (Double) user.get("bankbalance");
}
}
}
return null; // User not found or error in JSON data
}
// Update the bank balance of a specific user by their username
public void updateBankBalance(String username, double newBalance) {
JSONObject jsonObject = readJSONFile();
if (jsonObject != null) {
JSONArray usersArray = (JSONArray) jsonObject.get("users");
for (Object userObj : usersArray) {
JSONObject user = (JSONObject) userObj;
String storedUsername = (String) user.get("username");
if (storedUsername.equals(username)) {
user.put("bankbalance", newBalance);
writeJSONFile(jsonObject); // Update the JSON file with new data
break;
}
}
}
}
}
