Appending to a text file

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class UpdateFile {
    public static void main(String[] args) {
        // Name of the file where the lines will be saved or updated
        String fileName = "updated_file.txt";

        try {
            // Create a FileWriter object with the option to append to the existing file
            FileWriter file = new FileWriter(fileName, true);

            // Create a BufferedWriter object to write lines of text efficiently
            BufferedWriter writer = new BufferedWriter(file);

            // Create a Scanner object to read user input
            Scanner scanner = new Scanner(System.in);

            System.out.println("Enter lines to write or update in the file (Press Enter to finish):");

            // Read lines from the user until Enter is pressed
            String line = scanner.nextLine();
            while (!line.isEmpty()) {
                // Write the line to the file
                writer.write(line);
                writer.newLine(); // Add a newline after each line

                // Read the next line
                line = scanner.nextLine();
            }

            // Close the BufferedWriter and FileWriter
            writer.close();
            file.close();

            System.out.println("The lines have been written or updated in the file successfully.");

        } catch (IOException e) {
            // Handle possible input/output exceptions
            e.printStackTrace();
        }
    }
}