byte[]
String
try { if (s != null) { return s.getBytes("us-ascii"); } else { return null; } } catch (UnsupportedEncodingException e) { throw new Error(e); }
try { if (b != null) { return new String(b, "us-ascii"); } else { return null; } } catch (UnsupportedEncodingException e) { throw new Error(e); }