TaskTracker.java

import java.util.ArrayList;
import java.util.Scanner;

public class TaskTracker {
    static ArrayList<String> tasks = new ArrayList<>();
    static Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {
        while (true) {
            showMenu();
            int choice = getChoice();
            handleChoice(choice);
        }
    }

    static void showMenu() {
        System.out.println("\n===== Task Tracker =====");
        System.out.println("1. Add Task");
        System.out.println("2. View Tasks");
        System.out.println("3. Delete Task");
        System.out.println("4. Exit");
        System.out.print("Enter your choice: ");
    }

    static int getChoice() {
        try {
            return Integer.parseInt(scanner.nextLine());
        } catch (Exception e) {
            return -1;
        }
    }

    static void handleChoice(int choice) {
        switch (choice) {
            case 1 -> addTask();
            case 2 -> viewTasks();
            case 3 -> deleteTask();
            case 4 -> {
                System.out.println(" Exiting...");
                System.exit(0);
            }
            default -> System.out.println(" Invalid choice. Try again.");
        }
    }

    static void addTask() {
        System.out.print("Enter task description: ");
        String task = scanner.nextLine();
        tasks.add(task);
        System.out.println(" Task added!");
    }

    static void viewTasks() {
        if (tasks.isEmpty()) {
            System.out.println(" No tasks available.");
        } else {
            System.out.println("\n Your Tasks:");
            for (int i = 0; i < tasks.size(); i++) {
                System.out.println((i + 1) + ". " + tasks.get(i));
            }
        }
    }

    static void deleteTask() {
        viewTasks();
        if (tasks.isEmpty()) return;

        System.out.print("Enter task number to delete: ");
        try {
            int index = Integer.parseInt(scanner.nextLine()) - 1;
            if (index >= 0 && index < tasks.size()) {
                System.out.println(" Deleted: " + tasks.remove(index));
            } else {
                System.out.println(" Invalid task number.");
            }
        } catch (Exception e) {
            System.out.println(" Please enter a valid number.");
        }
    }
}