private static void appendTimeZone(StringBuilder buff,short tz){
  if (tz < 0) {
    buff.append('-');
    tz=(short)-tz;
  }
 else {
    buff.append('+');
  }
  int hours=tz / 60;
  tz-=hours * 60;
  int mins=tz;
  StringUtils.appendZeroPadded(buff,2,hours);
  if (mins != 0) {
    buff.append(':');
    StringUtils.appendZeroPadded(buff,2,mins);
  }
}

private static void appendTimeZone ( StringBuilder buff , short tz ) { if ( tz < 0 ) { buff . append ( '-' ) ; tz = ( short ) - tz ; } else { buff . append ( '+' ) ; } int hours = tz / 60 ; tz -= hours * 60 ; int mins = tz ; StringUtils . appendZeroPadded ( buff , 2 , hours ) ; if ( mins != 0 ) { buff . append ( ':' ) ; StringUtils . appendZeroPadded ( buff , 2 , mins ) ; } }
append a time zone to the string builder .
