Below snippet convert the Date instance from one time zone to other.
public static final String convert(Date date, TimeZone timeZone) {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
format.setTimeZone(timeZone);
return format.format(date);
}
Below snippet convert the Instant from one time zone to other.
public static final String convert(Instant instant, ZoneId zoneId) {
ZonedDateTime zonedDateTime = instant.atZone(zoneId);
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
return zonedDateTime.format(dateTimeFormatter);
}
Find the below working application.
ZoneUtil.java
package com.sample.app.util;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.TimeZone;
public class ZoneUtil {
public static final String convert(Date date, TimeZone timeZone) {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
format.setTimeZone(timeZone);
return format.format(date);
}
public static final String convert(Instant instant, ZoneId zoneId) {
ZonedDateTime zonedDateTime = instant.atZone(zoneId);
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
return zonedDateTime.format(dateTimeFormatter);
}
}
App.java
package com.sample.app;
import java.time.Instant;
import java.time.ZoneId;
import java.util.Date;
import java.util.TimeZone;
import com.sample.app.util.ZoneUtil;
public class App {
public static void main(String[] args) {
TimeZone defaultTimeZone = TimeZone.getDefault();
System.out.println("defaultTimeZone : " + defaultTimeZone);
Date date = new Date();
Instant instant = Instant.now();
String dateInUS = ZoneUtil.convert(date, TimeZone.getTimeZone("America/Los_Angeles"));
String instantInUS = ZoneUtil.convert(instant, ZoneId.of("America/Los_Angeles"));
System.out.println("\nTime in " + defaultTimeZone);
System.out.println("date : " + date);
System.out.println("instant : " + instant);
System.out.println("\nTime in " + TimeZone.getTimeZone("America/Los_Angeles"));
System.out.println("dateInUS : " + dateInUS);
System.out.println("instantInUS : " + instantInUS);
}
}
Sample Output
defaultTimeZone : sun.util.calendar.ZoneInfo[id="Asia/Kolkata",offset=19800000,dstSavings=0,useDaylight=false,transitions=7,lastRule=null] Time in sun.util.calendar.ZoneInfo[id="Asia/Kolkata",offset=19800000,dstSavings=0,useDaylight=false,transitions=7,lastRule=null] date : Tue Jul 26 14:35:16 IST 2022 instant : 2022-07-26T09:05:16.590Z Time in sun.util.calendar.ZoneInfo[id="America/Los_Angeles",offset=-28800000,dstSavings=3600000,useDaylight=true,transitions=185,lastRule=java.util.SimpleTimeZone[id=America/Los_Angeles,offset=-28800000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=3,startMonth=2,startDay=8,startDayOfWeek=1,startTime=7200000,startTimeMode=0,endMode=3,endMonth=10,endDay=1,endDayOfWeek=1,endTime=7200000,endTimeMode=0]] dateInUS : 2022-07-26T02:05:16.589-0700 instantInUS : 2022-07-26T02:05:16.590-0700
