code: @Pure
  	public static String[] extensions(File filename) {
  		if (filename == null) {
  			return new String[0];
  		}
  		final String largeBasename = largeBasename(filename);
  		final String[] parts = largeBasename.split(Pattern.quote(Character.toString(getFileExtensionCharacter())));
  		if (parts.length <= 1) {
  			return new String[0];
  		}
  		final String[] result = new String[parts.length - 1];
  		System.arraycopy(parts, 1, result, 0, result.length);
  		return result;
  	}
docs: Reply all the extensions of the specified file.
  
  @param filename is the name to parse.
  @return the extensions of the specified file