Main.java

import java.util.ArrayList;
import java.util.List;
import model.Expense;

public class Main {
    private static List<Expense> expenses = new ArrayList<>();
    private static int nextId = 1;

    public static void main(String[] args) {

        String command = args[0];

        switch (command) {
            case "add":{
                String name = args[1];
                float amount = Float.parseFloat(args[2]);
                Expense expense = new Expense(name, amount);
                expenses.add(expense);
                System.out.println("Expense added successfully.");
                break;
            }
            case "list": {
                for (Expense expense : expenses) {
                    System.out.println(expense.getName() + " - $" + expense.getAmount());
                }
                break;
            }
            case "delete": {
                int idToDelete = Integer.parseInt(args[1]) - 1;
                if (idToDelete >= 0 && idToDelete < expenses.size()) {
                    expenses.remove(idToDelete);
                    System.out.println("Expense deleted successfully.");
                } else {
                    System.out.println("Invalid expense ID.");
                }
                break;
            }
            default: {
                System.out.println("Invalid command.");
                break;
            }
        }
    }
}