NotesApp.java

import java.io.*;
import java.util.Scanner;

public class NotesApp {
 private static final String FILE_NAME = "notes.txt";

 public static void main(String[] args) {
 Scanner scanner = new Scanner(System.in);
 int choice;

 do {
 System.out.println("\n--- Simple Notes App ---");
 System.out.println("1. Write a new note");
 System.out.println("2. View all notes");
 System.out.println("3. Exit");
 System.out.print("Enter your choice: ");

 choice = scanner.nextInt();
 scanner.nextLine(); // consume newline

 switch (choice) {
 case 1:
 writeNote(scanner);
 break;
 case 2:
 readNotes();
 break;
 case 3:
 System.out.println("Exiting Notes App. Goodbye!");
 break;
 default:
 System.out.println("Invalid choice. Try again.");
 }

 } while (choice != 3);

 scanner.close();
 }

 private static void writeNote(Scanner scanner) {
 try {
 FileWriter writer = new FileWriter(FILE_NAME, true); // append mode
 System.out.print("Enter your note: ");
 String note = scanner.nextLine();
 writer.write(note + "\n");
 writer.close();
 System.out.println("Note saved successfully.");
 } catch (IOException e) {
 System.out.println("Error writing note: " + e.getMessage());
 }
 }

 private static void readNotes() {
 try {
 File file = new File(FILE_NAME);
 if (!file.exists()) {
 System.out.println("No notes found.");
 return;
 }

 BufferedReader reader = new BufferedReader(new FileReader(file));
 String line;
 System.out.println("\n--- Your Notes ---");
 while ((line = reader.readLine()) != null) {
 System.out.println("- " + line);
 }
 reader.close();
 } catch (IOException e) {
 System.out.println("Error reading notes: " + e.getMessage());
 }
 }
}