Java Project

ExpenseTracker.java

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+
+import javax.swing.*;
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+
+public class ExpenseTracker {
+    private static HashMap<String, User> users = new HashMap<>();
+    private static HashMap<String, ArrayList<Expense>> expenses = new HashMap<>();
+
+    public static void main(String[] args) {
+        createUser("sample_user", "sample_password");
+
+        String username = JOptionPane.showInputDialog(null, "Create username:");
+        String password = JOptionPane.showInputDialog(null, "Create password:");
+        createUser(username, password);
+
+        addExpense("sample_user");
+
+        while (true) {
+            String userUsername = JOptionPane.showInputDialog(null, "Enter your username:");
+            String userPassword = JOptionPane.showInputDialog(null, "Enter your password:");
+            if (authenticateUser(userUsername, userPassword)) {
+                JOptionPane.showMessageDialog(null, "User authenticated successfully.");
+
+                String description = JOptionPane.showInputDialog(null, "Enter expense description:");
+                double amount = Double.parseDouble(JOptionPane.showInputDialog(null, "Enter expense amount:"));
+                String date = JOptionPane.showInputDialog(null, "Enter expense date (YYYY-MM-DD):");
+                String category = JOptionPane.showInputDialog(null, "Enter expense category:");
+                Expense expense = new Expense(description, amount, date, category);
+
+                addExpenseDetails(userUsername, expense);
+                JOptionPane.showMessageDialog(null, "Expense added successfully.");
+
+                generateExpenseReport(userUsername);
+            } else {
+                JOptionPane.showMessageDialog(null, "Authentication failed. Please try again.");
+            }
+        }
+    }
+
+    private static void createUser(String username, String password) {
+        users.put(username, new User(username, password));
+        expenses.put(username, new ArrayList<>());
+    }
+
+    private static boolean authenticateUser(String username, String password) {
+        User user = users.get(username);
+        return user != null && user.getPassword().equals(password);
+    }
+
+    private static void addExpense(String username) {
+        Expense expense1 = new Expense("Groceries", 50.0, "2024-04-06", "Food");
+        Expense expense2 = new Expense("Utilities", 100.0, "2024-04-10", "Bills");
+
+        addExpenseDetails(username, expense1);
+        addExpenseDetails(username, expense2);
+    }
+
+    private static void addExpenseDetails(String username, Expense expense) {
+        ArrayList<Expense> userExpenses = expenses.get(username);
+        if (userExpenses != null) {
+            userExpenses.add(expense);
+        }
+    }
+
+    private static void generateExpenseReport(String username) {
+        ArrayList<Expense> userExpenses = expenses.get(username);
+        if (userExpenses != null && !userExpenses.isEmpty()) {
+            StringBuilder report = new StringBuilder("Expense Report for " + username + ":\n");
+            for (Expense expense : userExpenses) {
+                report.append("Description: ").append(expense.getDescription()).append("\n")
+                        .append("Amount: ").append(expense.getAmount()).append("\n")
+                        .append("Date: ").append(expense.getDate()).append("\n")
+                        .append("Category: ").append(expense.getCategory()).append("\n\n");
+            }
+            JOptionPane.showMessageDialog(null, report.toString());
+        } else {
+            JOptionPane.showMessageDialog(null, "No expenses found for this user.");
+        }
+    }
+}
+
+class User {
+    private String username;
+    private String password;
+
+    public User(String username, String password) {
+        this.username = username;
+        this.password = password;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+}
+
+class Expense {
+    private String description;
+    private double amount;
+    private String date;
+    private String category;
+
+    public Expense(String description, double amount, String date, String category) {
+        this.description = description;
+        this.amount = amount;
+        this.date = date;
+        this.category = category;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public double getAmount() {
+        return amount;
+    }
+
+    public String getDate() {
+        return date;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+}