code: public static void main(String[] args) throws Exception {
  		File f = new File("/tmp/test.2");
  		SimpleBitSet bs = new SimpleBitSet();
  		bs.set(1198);
  		bs.set(23);
  		serializeToFile(f, bs);
  		bs.set(666);
  		System.out.println(bs.toString());
  		bs = deserializeFromFile(f);
  		System.out.println(bs.toString());
  		f.delete();
  	}
docs: ==============