cloned.chars = cloned.chars;
cloned.chars = (char[]) cloned.chars.clone();
    public Object clone() {        try {            StrTokenizer cloned = (StrTokenizer) super.clone();            if (cloned.chars != null) {                cloned.chars = cloned.chars;            }            cloned.reset();            return cloned;        } catch (CloneNotSupportedException ex) {            return null;        }    }