Create Big File for testing Java

private static File createBigFile(int megs) throws IOException {
    byte[] bytes = new byte[1024*1024];
    Arrays.fill(bytes, (byte)32);
    File bigFile = File.createTempFile("tempFile", null);
    FileOutputStream fos = new FileOutputStream(bigFile);
    for (int i = 0; i < megs; i++) {
        fos.write(bytes);
    }
    fos.close();
    return bigFile;
}