code: private File[] getSources(final List<File> sourceList) {
      final File[] sortedSources = new File[sourceList.size()];
      sourceList.toArray(sortedSources);
      Arrays.sort(sortedSources, new Comparator<File>() {
        @Override
        public int compare(final File o1, final File o2) {
          return o1.getName().compareTo(o2.getName());
        }
      });
      return sortedSources;
    }
docs: Get alphabetized array of source files.
  
  @param sourceList
  list of source files
  @return File[] source files