At this post, I describe how to use tzupdater to update tzdata for JAVA. All steps performed on HP-UX 11.31 server.
Step 1:Download and Extract File
Extract Fıle tzdata2016g.tar.gz . You can get it from the link which I added below.
IANA
Also, you need tzupdater for your OS version.I added some of them but you should check "google" for more details.
HP-UX:
TzUpdater:
Step 2:Edit Version
Extract tzdata201g file and edit MakeFile for a version update.
#vi MakeFile From.; VERSION= unknown to; VERSION= 2016g
Step 3:Compress New Tzdata
Compress fixed MafeFile version with the same name.
#tar -cvf tzdata2016g.tar /tmp/new_tzdata2016g/*
Step 4:Create SHA12
I used the Linux server which sha12sum package installed. This command will create a sha12 key for your compressed file.
#sha512sum /tmp/tzdata2016g.tar.gz
Step 5:Create sha512 file.
Copy sha12sum command output and paste it to "tzdata2016g.tar.gz.sha512"
# sha512sum /tmp/tzdata2016g.tar.gz |awk '{print $1}' > /tmp/tzdata2016g.tar.gz.sha512
Step 6:File Extraction
Extract "tzupdater" binary ; then copy "tzdata2016g.tar.gz" file in this directory. Also tzdata2016g.tar.gz.sha512 must be in the same directory.
#tar -xvf tzupdater-2.0.0.tar
Step 7:Apply and test tzupdater.Java path can be changed with your installation directory.
#cd /tmp/tzupdater-2.0.0
#/opt/java6/bin/IA64N/java -jar tzupdater.jar --verbose -l file:///tmp/tzupdater-2.0.0/tzdata2016g.tar.gz
java.home: /opt/java6/jre
java.vendor: Hewlett-Packard Co.
java.version: 1.6.0.16
Downloaded file to /var/tmp/tz.tmp/tzdata.tar.gz
JRE tzdata version: tzdatatzdata2016g
tzupdater tool would update with tzdata version: tzdata2016g
Embedded tzmappings data version: tzdata2016g
Downloaded file to /var/tmp/tz.tmp/sha512hash
Current JRE has later version ({0}) than the tzupdater provided one ({1}).
The tzmappings file requires update
Updating tzmappings file... done.
Renaming tzmappings file... done.
done.
Extracting files... done.
Renaming /opt/java6/jre/lib/zi to /opt/java6/jre/lib/zi.tzdatatzdata2016g
Renaming /opt/java6/jre/lib/zi.tzdata2016g to /opt/java6/jre/lib/zi
Validating for : tzdata2016g
Validation complete
JRE updated to version : tzdata2016g
Step 8:Check new timezone
root @ TEST# /opt/java6/bin/IA64N/java GetCurrentDateTimeZone 2016/10/30 03:59:59 GMT+03:00 root @ TEST# /opt/java6/bin/IA64N/java GetCurrentDateTimeZone 2016/10/30 04:00:00 GMT+03:00
You can use this script to check Java Timezone information. The firstscript gets default Timezone information and the second one gets all supported timezones. You need to compile them with JAVAC command. JAVAC can be found under JDK binary.
#javac TimeZoneExample.java #javac GetCurrentDateTimeZone.java
Then This command creates GetCurrentDateTimeZone.class and TimeZoneExample.class file. You need to run this command like a added to get information.
#java TimeZoneExample | grep Istanbul #java GetCurrentDateTimeZone
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;
public class TimeZoneExample {
public static void main(String[] args) {
String[] ids = TimeZone.getAvailableIDs();
for (String id : ids) {
System.out.println(displayTimeZone(TimeZone.getTimeZone(id)));
}
System.out.println("\nTotal TimeZone ID " + ids.length);
}
private static String displayTimeZone(TimeZone tz) {
long hours = TimeUnit.MILLISECONDS.toHours(tz.getRawOffset());
long minutes = TimeUnit.MILLISECONDS.toMinutes(tz.getRawOffset())
- TimeUnit.HOURS.toMinutes(hours);
// avoid -4:-30 issue
minutes = Math.abs(minutes);
String result = "";
if (hours > 0) {
result = String.format("(GMT+%d:%02d) %s", hours, minutes, tz.getID());
} else {
result = String.format("(GMT%d:%02d) %s", hours, minutes, tz.getID());
}
return result;
}
}
Get Default Timezone Information
import java.util.Calendar;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
public class GetCurrentDateTimeZone {
public static void main(String[] args) {
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss z");
Calendar cal = Calendar.getInstance();
System.out.println(dateFormat.format(cal.getTime()));
}
}
