Example usage for java.util TimeZone getOffset

Introduction

In this page you can find the example usage for java.util TimeZone getOffset.

Prototype

public int getOffset(long date)

Source Link

Document

Returns the offset of this time zone from UTC at the specified date.

Usage

From source file:Main.java

public static void main(String args[]) {

    TimeZone timezone = TimeZone.getTimeZone("Europe/Paris");

    // checking offset value for date      
    System.out.println("Offset value:" + timezone.getOffset(Calendar.ZONE_OFFSET));
}

From source file:com.jdo.CloudContactUtils.java

public static void main(String[] args) {
    //   //ww  w  . ja  va2  s .com
    //     List<CloudContactNotification> lc=new ArrayList<CloudContactNotification>();
    //     CloudContactNotification a=new CloudContactNotification();
    //     a.setLastAccess(""+new Date().getTime());
    //     a.setText("tt");
    //     a.setUserName("dhaneesh");
    //     lc.add(a);
    //     
    //     System.out.println(JSONObject.wrap(lc));
    //   

    try {
        //Asia/Calcutta
        String[] allTimeZones = TimeZone.getAvailableIDs();
        Date now = new Date();
        for (int i = 0; i < allTimeZones.length; i++) {
            //System.out.println(allTimeZones[i]);
            TimeZone tz = TimeZone.getTimeZone(allTimeZones[i]);
            System.out.format("%s;%s; %f \n", allTimeZones[i], tz.getDisplayName(),
                    (float) (tz.getOffset(now.getTime()) / 3600000.0));
        }
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

From source file:Main.java

public static long getLocalDateFromUTC(long utcDate) { ////
    TimeZone tz = TimeZone.getDefault();
    long gmtOffser = tz.getOffset(utcDate);
    return utcDate - gmtOffser;
}

From source file:Main.java

public static long adjustTimezoneOffset(long utcMillies) {
    TimeZone tz = TimeZone.getTimeZone("CET");
    long offset = tz.getOffset(new Date().getTime());
    return utcMillies + offset;
}

From source file:Main.java

/**
 * //  w w  w .  ja  v a 2 s .co m
 * @return
 */
public static long getMillisGMT() {
    Calendar calendar = new GregorianCalendar();
    TimeZone mTimeZone = calendar.getTimeZone();
    int offset = mTimeZone.getOffset(System.currentTimeMillis());
    return System.currentTimeMillis() - offset;
}

From source file:Main.java

/**
 * Since all dates from the database are in UTC, we must convert the local date to the date in
 * UTC time. This function performs that conversion using the TimeZone offset.
 *
 * @param localDate The local datetime to convert to a UTC datetime, in milliseconds.
 * @return The UTC date (the local datetime + the TimeZone offset) in milliseconds.
 *//*  w  w w.  j a v  a 2 s .c  o  m*/
public static long getUTCDateFromLocal(long localDate) {
    TimeZone tz = TimeZone.getDefault();
    long gmtOffset = tz.getOffset(localDate);
    return localDate + gmtOffset;
}

From source file:Main.java

/**
 * Since all dates from the database are in UTC, we must convert the given date
 * (in UTC timezone) to the date in the local timezone. Ths function performs that conversion
 * using the TimeZone offset./* w  w  w  .j a v a 2s  .co  m*/
 *
 * @param utcDate The UTC datetime to convert to a local datetime, in milliseconds.
 * @return The local date (the UTC datetime - the TimeZone offset) in milliseconds.
 */
public static long getLocalDateFromUTC(long utcDate) {
    TimeZone tz = TimeZone.getDefault();
    long gmtOffset = tz.getOffset(utcDate);
    return utcDate - gmtOffset;
}

From source file:Main.java

public static Timestamp subtractTimeZoneOffset(Timestamp timestamp, TimeZone timeZone) {
    final long millisecondsToSubtract = Math.abs(timeZone.getOffset(timestamp.getTime()));
    return new Timestamp(timestamp.getTime() - millisecondsToSubtract);
}

From source file:Main.java

public static long JD2mils(double jd, TimeZone tz) {
    long mils = JD2mils(jd);
    return mils - tz.getOffset(mils);
}

From source file:Main.java

/**
 * Returns Timezone Offset From UTC in format {@code (+|i)HHMM} of specified
 * Timezone on specified date. If no date is specified, DST is considered
 * for the current date.//  ww w.  j a  va2 s .  c o m
 *
 * @param tz Timezone
 * @param date Date or {@code null}
 * @return Timezone Offset From UTC in format {@code (+|i)HHMM}
 */
public static String formatTimezoneOffsetFromUTC(TimeZone tz, Date date) {
    return appendZZZZZ(tz.getOffset(date == null ? System.currentTimeMillis() : date.getTime()),
            new StringBuilder(5)).toString();
}