How to gzip a file in Java using Files.copy

We needed our compress files generated from our apps at work and I went the old way using a fileInputStream and a fileoutputStream:

    private static void compressFileToGzipOldWay(File destinationDir, File fileToCompress) throws IOException {
        String compressedFilesName = fileToCompress.getName() + ".gz";
        File compressedFileDir = new File(destinationDir, compressedFilesName);
        FileInputStream fis = new FileInputStream(fileToCompress.getName());
        FileOutputStream fos = new FileOutputStream(compressedFileDir);
        GZIPOutputStream gzipOS = new GZIPOutputStream(fos);
        byte[] buffer = new byte[1024];
        int len;
        while ((len = fis.read(buffer)) != -1) {
            gzipOS.write(buffer, 0, len);
        }
        //close resources
        gzipOS.close();
        fos.close();
        fis.close();
    }

In the PR review a coworker let me know that this could be simplified with Files.copy. Strangely enough I haven’t found how to do it online, but I think it’s the superior way.

    private File compressFileToGzip(File destinationDir, File fileToCompress) throws IOException {
        String compressedFilesName = fileToCompress.getName() + ".gz";
        File compressedFileDir = new File(destinationDir, compressedFilesName);
        try (GZIPOutputStream gzipOutputStream
                        = new GZIPOutputStream(Files.newOutputStream(compressedFileDir.toPath()))) {
            Files.copy(fileToCompress.toPath(), gzipOutputStream);
        }
        return compressedFileDir;
    }