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Personal Expense Tracker in Java (Source Code)

PersonalExpenseTracker.java

import java.util.Scanner;

public class PersonalExpenseTracker {

static Scanner scanner = new Scanner(System.in);
    
    // Declare arrays to store expense details
    static String[] expenseNames = new String[10];
    static double[] expenseAmounts = new double[10];
    static int expenseCount = 0;

public static void main(String[] args) {
        int option;

// Main menu
        do {
            System.out.println("\n*** Personal Expense Tracker ***");
            System.out.println("1. Add Expense");
            System.out.println("2. View All Expenses");
            System.out.println("3. Calculate Total Expenses");
            System.out.println("4. Exit");
            System.out.print("Choose an option: ");
            option = scanner.nextInt();
            scanner.nextLine();  // Consume newline

switch (option) {
                case 1:
                    addExpense();
                    break;
                case 2:
                    viewExpenses();
                    break;
                case 3:
                    calculateTotalExpenses();
                    break;
                case 4:
                    System.out.println("Exiting...");
                    break;
                default:
                    System.out.println("Invalid option. Please try again.");
            }
        } while (option != 4);
    }

// Method to add a new expense
    static void addExpense() {
        if (expenseCount < expenseNames.length) {
            System.out.print("Enter expense name: ");
            expenseNames[expenseCount] = scanner.nextLine();
            
            System.out.print("Enter expense amount: ");
            expenseAmounts[expenseCount] = scanner.nextDouble();
            scanner.nextLine();  // Consume newline

expenseCount++;
            System.out.println("Expense added successfully.");
        } else {
            System.out.println("You have reached the maximum number of expenses.");
        }
    }

// Method to view all expenses
    static void viewExpenses() {
        if (expenseCount == 0) {
            System.out.println("No expenses recorded.");
        } else {
            System.out.println("\n*** Expenses List ***");
            for (int i = 0; i < expenseCount; i++) {
                System.out.println("Expense " + (i + 1) + ": " + expenseNames[i] + " - $" + expenseAmounts[i]);
            }
        }
    }

// Method to calculate and display total expenses
    static void calculateTotalExpenses() {
        if (expenseCount == 0) {
            System.out.println("No expenses to calculate.");
        } else {
            double total = 0;
            for (int i = 0; i < expenseCount; i++) {
                total += expenseAmounts[i];
            }
            System.out.println("Total Expenses: $" + total);
        }
    }
}

How it works:-

1. Add Expense: You can enter the name and amount of an expense. It will be saved in an array.
2. View All Expenses: Displays the list of all added expenses with their respective names and amounts.
3. Calculate Total Expenses: Calculates and displays the total amount of all recorded expenses.
4. Exit: Ends the program.

Features:-

‣ The program allows up to 10 expenses by default, but you can increase the array size if needed.
‣ Basic input validation: ensures the user can only enter valid expenses (although error checking for input types could be improved).
‣ Simple user interface through the console.

Running the Program:

1. Copy the code into a file called PersonalExpenseTracker.java.
2. Open a terminal and compile the code with the following command:
3. Run the program using:

With this code, you can develop Personal Expense Tracker in Java to fit your needs.

Personal Expense Tracker in Java (Source Code)

PersonalExpenseTracker.java

How it works:-

Features:-

Running the Program:

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