public class SerializationHelper {

  private static final char[] hexArray = "0123456789ABCDEF".toCharArray();

  public static Object fromString(String s) throws IOException, ClassNotFoundException {
    byte[] data = Base64.getDecoder().decode(s);
    ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(data));
    Object o = ois.readObject();
    ois.close();
    return o;
  }
}