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


        String name;
        String email;

        try {
            PrintWriter printWriter = new PrintWriter("file.txt");
            System.out.print("Adjon meg egy nevet:");
            name = scanner.nextLine();

            while (!name.equals("")) {
                System.out.print("Adjon meg egy emailt: ");
                email = scanner.nextLine();

                printWriter.printf("%s - %s\n", name, email);

                System.out.print("Adjon meg egy nevet:");
                name = scanner.nextLine();
            }

            printWriter.close();
        } catch (IOException error) {
            System.err.println(error.getMessage());
        }

        String row;

        try {
            BufferedReader reader = new BufferedReader(new FileReader("file.txt"));

            while ((row = reader.readLine()) != null) {
                System.out.println(row);
            }
            reader.close();

        } catch (IOException error) {
            System.err.println(error.getMessage());
        }
    }