code: File findSdkHome(final String path) {
          File dotCeylon = new File(path); // or some other directory
          
          File[] homes = null;
          
          if (!dotCeylon.exists()) {
              return null;
          } else {
              homes = dotCeylon.listFiles(new FilenameFilter() {
                  @Override
                  public boolean accept(final File dir, final String name) {
                      if (name.startsWith("ceylon-1.")) {
                          return true;
                      }
                      return false;
                  }
              });
          }
          
          if (homes.length == 0) {
              return null;
          } else if (homes.length == 1 & homes[0].isDirectory()) {
              return homes[0];
          } else {
              Arrays.sort(homes);
              if (homes[homes.length - 1].isDirectory()) {
                  return homes[homes.length - 1];
              } else {
                  return null;
              }
          }
      }
docs: Find Ceylon SDK home in a folder, in the form of 'ceylon-1.x.x'.
  @param path Folder path to search in
  @return File folder whose name is alphabetically highest, or null if not found.