Cara Membuat Aplikasi To-Do List Sederhana dengan Java Console

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;

public class ToDoList {

    private ArrayList<String> tasks;

    public ToDoList() {
        tasks = new ArrayList<String>();
    }

    public void addTask(String task) {
        tasks.add(task);
    }

    public void removeTask(int index) {
        tasks.remove(index);
    }

    public void displayTasks() {
        for (int i = 0; i < tasks.size(); i++) {
            System.out.println((i + 1) + ". " + tasks.get(i));
        }
    }

    public void saveTasks() {
        try {
            File file = new File("tasks.txt");
            FileWriter writer = new FileWriter(file);
            for (String task : tasks) {
                writer.write(task + "\n");
            }
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void loadTasks() {
        try {
            File file = new File("tasks.txt");
            Scanner scanner = new Scanner(file);
            while (scanner.hasNextLine()) {
                tasks.add(scanner.nextLine());
            }
            scanner.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        ToDoList todo = new ToDoList();

        Scanner input = new Scanner(System.in);
        int choice;
        do {
            System.out.println("Menu Aplikasi To-Do List:");
            System.out.println("1. Tambah Tugas");
            System.out.println("2. Hapus Tugas");
            System.out.println("3. Tampilkan Tugas");
            System.out.println("4. Simpan Tugas");
            System.out.println("5. Load Tugas");
            System.out.println("6. Keluar");
            System.out.print("Pilih menu: ");
            choice = input.nextInt();
            switch (choice) {
                case 1:
                    System.out.print("Masukkan tugas: ");
                    input.nextLine();
                    String task = input.nextLine();
                    todo.addTask(task);
                    break;
                case 2:
                    System.out.print("Masukkan nomor tugas yang akan dihapus: ");
                    int index = input.nextInt();
                    todo.removeTask(index - 1);
                    break;
                case 3:
                    todo.displayTasks();
                    break;
                case 4:
                    todo.saveTasks();
                    System.out.println("Tugas berhasil disimpan");
                    break;
                case 5:
                    todo.loadTasks();
                    System.out.println("Tugas berhasil di-load");
                    break;
                case 6:
                    System.out.println("Terima kasih telah menggunakan aplikasi ini");
                    break;
                default:
                    System.out.println("Pilihan tidak valid");
                    break;
            }
        } while (choice != 6);
    }
}