Timezones and versions of Java

From:

loial <jldunn2000@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 23 May 2011 07:38:54 -0700 (PDT)

Message-ID:

<fde67e7a-6198-4e7f-a07b-4655c1108d15@j13g2000pro.googlegroups.com>

I am trying to convert BST times to EST.

The following code correctly returns a difference of 5 hours between
the 2 times when run under Java 1.5. :

Local Offset 3600000
EST Offset -14400000
EST time Tue May 04 07:48:18 2010
BST time Tue May 04 12:48:18 2010

However if run under Java 1.6 (on the same machine), it returns a time
difference of 6 hours :

Local Offset 3600000
EST Offset -18000000
EST time Tue May 04 06:48:18 2010
BST time Tue May 04 12:48:18 2010

Do I need to do something different in Java 1.6?.

Platform is linux.

class testtz {
    public static void main(String[] args) {

       Date date = null;

       SimpleDateFormat dateFormat = new
SimpleDateFormat("yyyyMMddHHmmss");

       try {

            date = dateFormat.parse("20100504124818");
       }
       catch(ParseException pe) {
           System.out.println("Error");
       }

       TimeZone tz1 = TimeZone.getDefault();

       long localOffset = tz1.getOffset(date.getTime());

       System.out.println("Local Offset " + localOffset);

       TimeZone tz2 = TimeZone.getTimeZone("EST");

       long remoteOffset = tz2.getOffset(date.getTime());

       System.out.println("EST Offset " + remoteOffset);

       Date dateToPutInDB = new Date(date.getTime() - localOffset +
remoteOffse;

       System.out.println("EST time " + dateToPutInDB)

       System.out.println("BST time " + date);

   }

}