problems with Java daylight savings time

Question

I have a Java app that needs to be cognizant of the time zone. When I take a Unix epoch time and try to convert it into a timestamp to use for an Oracle SQL call, it is get

Answer 1

I have found a way to ensure the daylight saving is ignored

TimeZone tz = TimeZone.getTimeZone("GMT");
TimeZone.setDefault(tz);
GregorianCalendar calendar;
calendar = new GregorianCalendar();

Set the timezone before you create your GregorianCalendar object