private String quote(String s){
  String str=null;
  if (s == null) {
    str="\"\"";
  }
 else {
    str="\"" + s + "\"";
  }
  return str;
}

private String quote ( String s ) { String str = null ; if ( s == null ) { str = "\"\"" ; } else { str = "\"" + s + "\"" ; } return str ; }
places quotes around a string
