Change to FileWriter

     * vertices or points in a 3D space.

     * <p>

     * This method creates or overwrites a file named according to the {@code filename} parameter. It uses

     * a {@link BufferedWriter} to efficiently write lines to the file. Each line represents a collection of

     * a {@link FileWriter} to efficiently write lines to the file. Each line represents a collection of

     * three coordinate points, each point consisting of x, y, and z coordinates generated randomly within a

     * range of 0 to 30 (exclusive).

     *

     */

    public static void randFileGenerator(String filename) throws IOException {

        Random random = new Random();

        try (BufferedWriter writer = new BufferedWriter(new FileWriter(filename))) {

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

                for (int i = 0; i < 15000; i++) {

                    String face = makeLine(random);

                    writer.write(face);

                writer.newLine();

                    writer.write(System.lineSeparator());

                }

            }