builder = new StringBuilder(getClass().getName());
builder = new StringBuffer(getClass().getName());
    public String toString()    {      StringBuilder builder;      builder = new StringBuilder(getClass().getName());      builder.append("[field=");      builder.append(field);      builder.append(", size=");      builder.append(size);      builder.append(", character=");      builder.append(character);      builder.append("]");      return builder.toString();    }