Getting ZoneId from a SimpleTimeZone

Question

Using Java I have a SimpleTimeZone instance with GMT offset and daylight saving time information from a legacy system.

I would like to retrieve Zo

Answer 1

Here the solution i prefer because it's simple, but you need a Date and a TimeZone as parameters to retrievethe the ZoneId

private ZoneId getZoneOffsetFor(final Date date, final TimeZone timeZone){
  int offsetInMillis = getOffsetInMillis(date, timeZone);
  return ZoneOffset.ofTotalSeconds( offsetInMillis / 1000 );
}

private int getOffsetInMillis(final Date date, final TimeZone timeZone){
  int offsetInMillis = timeZone.getRawOffset();
  if(timeZone.inDaylightTime(date)){
     offsetInMillis += timeZone.getDSTSavings();
  }
  return offsetInMillis;
}