DATE UTIL

Date UTIL -Anirudh

//Convert date in one time zone to other time zone
public static Date convertTimeZone(Date date,String timeZoneFrom,String timeZoneTo){
		Date utcDate = convertDateFromUserTimeZoneToUTC(date,timeZoneFrom);
		TimeZone timeZone = TimeZone.getTimeZone(timeZoneTo);
		return changeTimeZoneOfUTCDate(utcDate,timeZone);
		
	}


//convert a date in one time zone to UTC

	public static Date convertDateFromUserTimeZoneToUTC(Date userdate,String usertimeZoneId){
		TimeZone userTimeZone = TimeZone.getTimeZone(usertimeZoneId);
		return new Date(userdate.getTime() - userTimeZone.getRawOffset());
	}
	
	
    // Changes a date in UTC to another timezone  
    private static Date changeTimeZoneOfUTCDate(Date utcDate, TimeZone zone) {  
        Calendar first = Calendar.getInstance(zone);  
        first.setTimeInMillis(utcDate.getTime());  
  
        Calendar output = Calendar.getInstance();  
         
        output.set(Calendar.DAY_OF_MONTH, first.get(Calendar.DAY_OF_MONTH)); 
        output.set(Calendar.MONTH, first.get(Calendar.MONTH));
        output.set(Calendar.YEAR, first.get(Calendar.YEAR)); 
        output.set(Calendar.HOUR_OF_DAY, first.get(Calendar.HOUR_OF_DAY));  
        output.set(Calendar.MINUTE, first.get(Calendar.MINUTE));  
        output.set(Calendar.SECOND, first.get(Calendar.SECOND));  
        output.set(Calendar.MILLISECOND, first.get(Calendar.MILLISECOND));  
  
        return output.getTime();  
    }