Pgm 2

import java.io.*;

import java.util.Scanner;

class FS {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        String fileName = "msc1.txt";

        int choice;

        do {

            System.out.println("\nFile Operations Menu:");

            System.out.println("1. Create a File");

            System.out.println("2. Write to the File");

            System.out.println("3. Read from the File");

            System.out.println("4. Update the File");

            System.out.println("5. Delete the File");

            System.out.print("Enter your choice: ");

            choice = scanner.nextInt();

            scanner.nextLine(); // consume the newline

            switch (choice) {

                case 1:

                    createFile(fileName);

                    break;

                case 2:

                    System.out.print("Enter content to write: ");

                    String content = scanner.nextLine();

                    writeToFile(fileName, content);

                    break;

                case 3:

                    readFromFile(fileName);

                    break;

                case 4:

                    System.out.print("Enter content to append: ");

                    String updateContent = scanner.nextLine();

                    updateFile(fileName, updateContent);

                    break;

                case 5:

                    deleteFile(fileName);

                    break;

                default:

                    System.out.println("Invalid choice. Please try again.");

            }

        } while (true); // Continuous loop until the program is manually terminated

        // scanner.close(); // No need to close scanner since program will run indefinitely

    }

    public static void createFile(String fileName) {

        File file = new File(fileName);

        try {

            if (file.createNewFile()) {

                System.out.println("File created successfully: " + file.getName());

            } else {

                System.out.println("File already exists.");

            }

        } catch (IOException e) {

            System.out.println("An error occurred while creating the file.");

            e.printStackTrace();

        }

    }

    public static void writeToFile(String fileName, String content) {

        try (FileWriter writer = new FileWriter(fileName)) {

            writer.write(content);

            System.out.println("Successfully wrote to the file.");

        } catch (IOException e) {

            System.out.println("An error occurred while writing to the file.");

            e.printStackTrace();

        }

    }

    public static void updateFile(String fileName, String content) {

        try (FileWriter writer = new FileWriter(fileName, true)) {

            writer.write(content);

            System.out.println("Successfully updated the file.");

        } catch (IOException e) {

            System.out.println("An error occurred while updating the file.");

            e.printStackTrace();

        }

    }

    public static void readFromFile(String fileName) {

        try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {

            String line;

            System.out.println("Reading from file:");

            while ((line = reader.readLine()) != null) {

                System.out.println(line);

            }

        } catch (IOException e) {

            System.out.println("An error occurred while reading from the file.");

            e.printStackTrace();

        }

    }

    public static void deleteFile(String fileName) {

        File file = new File(fileName);

        if (file.delete()) {

            System.out.println("Deleted the file: " + file.getName());

        } else {

            System.out.println("Failed to delete the file.");

        }

    }

}

Output: