TaskManager

//importing the Scanner and the ArrayList class and the List interface from the java.util package
import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;

//creating TasksMenu class to manage a user interface, the constructor of the TasksMenu contains  a list of objects of class Task
public class TasksMenu {
    private final List<Task> tasks;

    public TasksMenu(List<Task> tasks) {
        this.tasks = tasks;
    }
//creating viewTasks() method
    public void viewTasks() {
        System.out.println("Your tasks:");
        for (int i = 0; i < tasks.size(); i++) {
            Task task = tasks.get(i);
            System.out.println((i + 1) + ". " + task.getName() + " - Done: " + task.isDone());
        }
    }
//creating addTask() method
    public void addTask(String taskName) {
        Task newTask = new Task(taskName);
        tasks.add(newTask);
        System.out.println("Task added: " + taskName);
    }
//creating markTaskAsDone() method
    public void markTaskAsDone(int taskIndex) {
        if (taskIndex >= 0 && taskIndex < tasks.size()) {
            Task task = tasks.get(taskIndex);
            task.setDone(true);
            System.out.println("Task marked as done: " + task.getName());
        } else {
            System.out.println("Invalid task index.");
        }
    }

//main method
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        List<Task> tasks = new ArrayList<>();
        TasksMenu tasksMenu = new TasksMenu(tasks);
//creating the menu interface
        while (true) {
            System.out.println("Options:");
            System.out.println("1. View tasks");
            System.out.println("2. Add task ");
            System.out.println("3. Mark task as done");
            System.out.println("4. Exit");
            System.out.print("Enter your choice (1-4): ");

            int choice = scanner.nextInt();
//using the switch method for interacting with user
            switch (choice) {
                case 1:
                    tasksMenu.viewTasks();
                    break;
                case 2:
                    System.out.print("Enter the task: ");
                    scanner.nextLine();  // Consume the newline character left by nextInt()
                    String taskName = scanner.nextLine();
                    tasksMenu.addTask(taskName);
                    break;
                case 3:
                    System.out.print("Enter the index of the task to mark as done: ");
                    int taskIndex = scanner.nextInt();
                    tasksMenu.markTaskAsDone(taskIndex - 1); // Adjust index to match the displayed list
                    break;
                case 4:
                    System.out.println("Exiting the program. Goodbye!");
                    scanner.close();  // Close only the scanner, not System.in
                    System.exit(0);
                default:
                    System.out.println("Invalid choice. Please enter a number between 1 and 4.");
            }
        }
    }
}




//creating a Task class with relevant methods
class Task {
    private final String name;
    private boolean isDone;

    public Task(String name) {
        this.name = name;
        this.isDone = false; // Tasks are initially not done
    }

    public String getName() {
        return name;
    }

    public boolean isDone() {
        return isDone;
    }
    public void setDone(boolean done) {
        isDone = done;
    }
}