2nd year_129_FinTech

README.md

@@ -1,11 +1,16 @@
-# Buffer-6.0
+The problem statement:
+- **Set and track** personalized financial goals (vacation, car, emergency fund, etc.), calculating required savings and sending reminders. 
+- **Predict loan repayment schedules** without machine learning by analyzing loan amounts, interest rates, and payment history. 
+- **Detect suspicious transactions** and send alerts based on predefined financial behavior patterns
+
+The **Smart Finance Assistant** helps users manage their finances by:
+1. Setting and tracking personalized financial goals (e.g., vacations, cars, emergency funds) with savings tracking.
+2. Predicting loan repayment schedules without using machine learning—based on loan amount, interest rate, and paid history.
+3. Logging and monitoring bank transactions, with scope for detecting suspicious patterns.
+4. Allowing users to link their bank account, view balance, and simulate real-world financial decision-making (e.g., saving, loan payments).
+5. The assistant provides a menu-driven interface for seamless interaction and financial monitoring.
 
-The themes for Buffer 6.0 are -
+In the Smart Finance Assistant Java program, several data structures are utilized to manage financial data efficiently. The program uses object-oriented classes such as Goal, Loan, Transaction, and BankAccount to encapsulate related attributes and behaviors. To store collections of these objects, it employs **ArrayList**, a dynamic data structure from Java’s Collection Framework. Specifically, an ArrayList<Goal> keeps track of all user-defined savings goals, while an ArrayList<Loan> maintains the list of active loans and their payment statuses. Similarly, an ArrayList<Transaction> is used to store and categorize individual expense transactions. A single instance of the BankAccount class holds the user’s bank details, including account number, IFSC code, and balance, allowing for secure verification and transactions. Additionally, the Scanner class is used for capturing user input throughout the program. These data structures collectively enable the system to model real-world financial operations in a modular, organized, and scalable manner.
 
-1. FinTech
-
-2. Women Safety
-
-3. Next-Gen Academic Solutions
-
-4. Custom Data Structure
+The link to short video:
+https://drive.google.com/file/d/15by2Sp1RhzFrNy6zSsMgnChexfQRcjHO/view?usp=sharing

SmartFinanceAssistant.java

@@ -0,0 +1,328 @@
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class SmartFinanceAssistant {
+    static class Goal {
+        String name;
+        double amount;
+        int duration;
+        double savedAmount;
+
+        Goal(String name, double amount, int duration) {
+            this.name = name;
+            this.amount = amount;
+            this.duration = duration;
+            this.savedAmount = 0;
+        }
+
+        void addSavedAmount(double amount) {
+            this.savedAmount += amount;
+        }
+
+        boolean isAchieved() {
+            return savedAmount >= amount;
+        }
+
+        @Override
+        public String toString() {
+            return name + " - $" + amount + " over " + duration + " months. Saved: $" + savedAmount +
+                    (isAchieved() ? " (Achieved)" : " (Not Achieved) - To Save: $" + (amount - savedAmount));
+        }
+    }
+
+    static class Loan {
+        double amount;
+        double interestRate;
+        int duration;
+        double paidAmount;
+
+        Loan(double amount, double interestRate, int duration) {
+            this.amount = amount;
+            this.interestRate = interestRate;
+            this.duration = duration;
+            this.paidAmount = 0;
+        }
+
+        double calculateMonthlyPayment() {
+            return (amount * (1 + interestRate / 100)) / duration;
+        }
+
+        boolean isPaidOff() {
+            return paidAmount >= amount;
+        }
+
+        double amountRemaining() {
+            return amount - paidAmount;
+        }
+
+        void predictRepaymentSchedule() {
+            double monthlyPayment = calculateMonthlyPayment();
+            double remaining = amountRemaining();
+            int monthsLeft = (int) Math.ceil(remaining / monthlyPayment);
+
+            System.out.println("Predicted Monthly Payment: $" + String.format("%.2f", monthlyPayment));
+            System.out.println("Remaining Amount: $" + String.format("%.2f", remaining));
+            System.out.println("Estimated Months Left: " + monthsLeft + " month(s)");
+        }
+
+        @Override
+        public String toString() {
+            return "Loan of $" + amount + " at " + interestRate + "% for " + duration + " months. Paid: $" + paidAmount +
+                    (isPaidOff() ? " (Paid off)" : " (Remaining: $" + amountRemaining() + ")");
+        }
+    }
+
+    static class Transaction {
+        double amount;
+        String category;
+
+        Transaction(double amount, String category) {
+            this.amount = amount;
+            this.category = category;
+        }
+
+        @Override
+        public String toString() {
+            return "$" + amount + " - " + category;
+        }
+    }
+
+    static class BankAccount {
+        String accountNumber;
+        String ifscCode;
+        double balance;
+
+        BankAccount(String accountNumber, String ifscCode, double balance) {
+            this.accountNumber = accountNumber;
+            this.ifscCode = ifscCode;
+            this.balance = balance;
+        }
+
+        boolean verifyAccount(String accountNumber, String ifscCode) {
+            return this.accountNumber.equals(accountNumber) && this.ifscCode.equals(ifscCode);
+        }
+
+        void deductAmount(double amount) {
+            if (balance >= amount) {
+                balance -= amount;
+            } else {
+                System.out.println("Insufficient funds!");
+            }
+        }
+
+        @Override
+        public String toString() {
+            return "Account Balance: $" + balance;
+        }
+    }
+
+    static double accountBalance = 0;
+    static BankAccount bankAccount = null;
+    static ArrayList<Goal> goals = new ArrayList<>();
+    static ArrayList<Loan> loans = new ArrayList<>();
+    static ArrayList<Transaction> transactions = new ArrayList<>();
+    static Scanner scanner = new Scanner(System.in);
+
+    public static void main(String[] args) {
+        while (true) {
+            showMenu();
+            int choice = scanner.nextInt();
+            scanner.nextLine();
+            switch (choice) {
+                case 1:
+                    addGoal();
+                    break;
+                case 2:
+                    addTransaction();
+                    break;
+                case 3:
+                    addLoan();
+                    break;
+                case 4:
+                    payLoan();
+                    break;
+                case 5:
+                    viewSummary();
+                    break;
+                case 6:
+                    System.out.println("Exiting program...");
+                    return;
+                case 7:
+                    predictLoanRepayment();
+                    break;
+                default:
+                    System.out.println("Invalid choice. Please try again.");
+            }
+        }
+    }
+
+    public static void showMenu() {
+        System.out.println("\nSmart Finance Assistant");
+        System.out.println("1. Add Goal");
+        System.out.println("2. Add Transaction");
+        System.out.println("3. Add Loan");
+        System.out.println("4. Pay Loan");
+        System.out.println("5. View Summary");
+        System.out.println("6. Exit");
+        System.out.println("7. Predict Loan Repayment");
+        System.out.print("Enter your choice: ");
+    }
+
+    public static void addGoal() {
+        verifyBankDetails();
+
+        System.out.print("Enter Goal Name: ");
+        String name = scanner.nextLine();
+        System.out.print("Enter Goal Amount ($): ");
+        double amount = scanner.nextDouble();
+        System.out.print("Enter Goal Duration (Months): ");
+        int duration = scanner.nextInt();
+        scanner.nextLine();
+
+        Goal goal = new Goal(name, amount, duration);
+        goals.add(goal);
+        System.out.print("Enter amount to save towards this goal: ");
+        double saveAmount = scanner.nextDouble();
+        scanner.nextLine();
+
+        if (saveAmount <= accountBalance) {
+            goal.addSavedAmount(saveAmount);
+            accountBalance -= saveAmount;
+            System.out.println("Saved $" + saveAmount + " towards the goal. New balance: $" + accountBalance);
+        } else {
+            System.out.println("Insufficient funds to save towards this goal.");
+        }
+
+        System.out.println("Goal added successfully!");
+    }
+
+    public static void addTransaction() {
+        verifyBankDetails();
+
+        System.out.print("Enter Transaction Amount ($): ");
+        double amount = scanner.nextDouble();
+        scanner.nextLine();
+        System.out.print("Enter Category: ");
+        String category = scanner.nextLine();
+
+        if (accountBalance >= amount) {
+            accountBalance -= amount;
+            transactions.add(new Transaction(amount, category));
+            System.out.println("Transaction processed successfully!");
+        } else {
+            System.out.println("Insufficient funds!");
+        }
+    }
+
+    public static void addLoan() {
+        verifyBankDetails();
+
+        System.out.print("Enter Loan Amount ($): ");
+        double amount = scanner.nextDouble();
+        System.out.print("Enter Interest Rate (%): ");
+        double interestRate = scanner.nextDouble();
+        System.out.print("Enter Loan Duration (Months): ");
+        int duration = scanner.nextInt();
+        scanner.nextLine();
+
+        Loan loan = new Loan(amount, interestRate, duration);
+        loans.add(loan);
+        System.out.println("Loan added successfully!");
+    }
+
+    public static void payLoan() {
+        verifyBankDetails();
+
+        System.out.print("Enter Loan Index to Pay: ");
+        int loanIndex = scanner.nextInt();
+        scanner.nextLine();
+
+        if (loanIndex >= 0 && loanIndex < loans.size()) {
+            Loan loan = loans.get(loanIndex);
+            double monthlyPayment = loan.calculateMonthlyPayment();
+            if (accountBalance >= monthlyPayment) {
+                loan.paidAmount += monthlyPayment;
+                accountBalance -= monthlyPayment;
+                System.out.println("Paid $" + monthlyPayment + " towards the loan.");
+            } else {
+                System.out.println("Insufficient funds to pay the loan.");
+            }
+        } else {
+            System.out.println("Invalid loan index.");
+        }
+    }
+
+    public static void predictLoanRepayment() {
+        if (loans.isEmpty()) {
+            System.out.println("No loans found.");
+            return;
+        }
+
+        System.out.println("Select Loan to Predict:");
+        for (int i = 0; i < loans.size(); i++) {
+            System.out.println(i + ": " + loans.get(i));
+        }
+
+        int index = scanner.nextInt();
+        scanner.nextLine();
+
+        if (index >= 0 && index < loans.size()) {
+            loans.get(index).predictRepaymentSchedule();
+        } else {
+            System.out.println("Invalid loan index.");
+        }
+    }
+
+    public static void viewSummary() {
+        System.out.println("\n--- Summary ---");
+        if (bankAccount != null) {
+            System.out.println(bankAccount);
+        }
+
+        System.out.println("\nGoals:");
+        for (Goal goal : goals) {
+            System.out.println(goal);
+        }
+
+        System.out.println("\nLoans:");
+        for (Loan loan : loans) {
+            System.out.println(loan);
+        }
+
+        System.out.println("\nTransactions:");
+        for (Transaction transaction : transactions) {
+            System.out.println(transaction);
+        }
+
+        System.out.println("Current Account Balance: $" + accountBalance);
+    }
+
+    public static void linkBankAccount() {
+        System.out.print("Enter Bank Account Number: ");
+        String accountNumber = scanner.nextLine();
+        System.out.print("Enter IFSC Code: ");
+        String ifscCode = scanner.nextLine();
+
+        double balance = 1000.00;
+        bankAccount = new BankAccount(accountNumber, ifscCode, balance);
+        accountBalance = balance;
+        System.out.println("Bank account linked successfully with balance: $" + accountBalance);
+    }
+
+    private static void verifyBankDetails() {
+        if (bankAccount == null) {
+            System.out.println("Please link your bank account first.");
+            linkBankAccount();
+        }
+
+        System.out.print("Enter Account Number: ");
+        String accountNumber = scanner.nextLine();
+        System.out.print("Enter IFSC Code: ");
+        String ifscCode = scanner.nextLine();
+
+        if (!bankAccount.verifyAccount(accountNumber, ifscCode)) {
+            System.out.println("Invalid bank details. Please check and try again.");
+            System.exit(0);
+        }
+    }
+}