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Java convert date and time between timezone


Java convert date and time between timezone

package com.codesjava;
 
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
 
public class ConvertTimeZoneTest {
  private static final String DATE_FORMAT = "dd-M-yyyy hh:mm:ss a";
  public static void main(String args[]) throws InterruptedException, ParseException{
      SimpleDateFormat formatter = new SimpleDateFormat(DATE_FORMAT);
 
      String dateInString = "09-04-2018 11:55:35 AM";
      Date date = formatter.parse(dateInString);
      TimeZone tz = TimeZone.getDefault();
 
      //From TimeZone Asia/Kolkata
      System.out.println("TimeZone : " + tz.getID() + " - " + tz.getDisplayName());
      System.out.println("TimeZone : " + tz);
      System.out.println("Date (Singapore) : " + formatter.format(date));
 
      //To TimeZone America/New_York
      SimpleDateFormat sdfAmerica = new SimpleDateFormat(DATE_FORMAT);
      TimeZone tzInAmerica = TimeZone.getTimeZone("America/New_York");
      sdfAmerica.setTimeZone(tzInAmerica);
 
      String sDateInAmerica = sdfAmerica.format(date); // Convert to String first
      Date dateInAmerica = formatter.parse(sDateInAmerica); // Create a new Date object
 
      System.out.println("nTimeZone : " + tzInAmerica.getID() + " - " 
                                                    + tzInAmerica.getDisplayName());
      System.out.println("TimeZone : " + tzInAmerica);
      System.out.println("Date (New York) (String) : " + sDateInAmerica);
      System.out.println("Date (New York) (Object) : " + formatter.format(dateInAmerica));
  }
}

Output:

TimeZone : Asia/Calcutta - India Standard Time
TimeZone : sun.util.calendar.ZoneInfo[id="Asia/Calcutta",offset=19800000,
dstSavings=0,useDaylight=false,transitions=6,lastRule=null]
Date (Singapore) : 09-4-2018 11:55:35 AM
 
TimeZone : America/New_York - Eastern Standard Time
TimeZone : sun.util.calendar.ZoneInfo[id="America/New_York",offset=-18000000,dstSavings=3600000,
useDaylight=true,transitions=235,lastRule=java.util.SimpleTimeZone[id=America/New_York,
offset=-18000000,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]]
Date (New York) (String) : 09-4-2018 02:25:35 AM
Date (New York) (Object) : 09-4-2018 02:25:35 AM
Posted in Date   


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