Java Code Examples for java.util.TimeZone#getDefault()

protected TimestampTreeReader(TimeZone timeZone, int columnId, InStream presentStream, InStream dataStream,
                              InStream nanosStream, OrcProto.ColumnEncoding encoding, boolean skipCorrupt)
    throws IOException {
  super(columnId, presentStream);
  this.skipCorrupt = skipCorrupt;
  this.baseTimestampMap = new HashMap<>();
  this.readerTimeZone = timeZone;
  this.writerTimeZone = TimeZone.getDefault();
  this.hasSameTZRules = writerTimeZone.hasSameRules(readerTimeZone);
  this.base_timestamp = getBaseTimestamp(readerTimeZone.getID());
  if (encoding != null) {
    checkEncoding(encoding);

    if (dataStream != null) {
      this.data = createIntegerReader(encoding.getKind(), dataStream, true, skipCorrupt);
    }

    if (nanosStream != null) {
      this.nanos = createIntegerReader(encoding.getKind(), nanosStream, false, skipCorrupt);
    }
  }
}
 

/**
 * Takes a JarInputStream and converts into a pack-stream.
 * <p>
 * Closes its input but not its output.  (Pack200 archives are appendable.)
 * <p>
 * The modification time and deflation hint attributes are not available,
 * for the jar-manifest file and the directory containing the file.
 *
 * @see #MODIFICATION_TIME
 * @see #DEFLATION_HINT
 * @param in a JarInputStream
 * @param out an OutputStream
 * @exception IOException if an error is encountered.
 */
public synchronized void pack(JarInputStream in, OutputStream out) throws IOException {
    assert(Utils.currentInstance.get() == null);
    TimeZone tz = (props.getBoolean(Utils.PACK_DEFAULT_TIMEZONE)) ? null :
        TimeZone.getDefault();
    try {
        Utils.currentInstance.set(this);
        if (tz != null) TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
        if ("0".equals(props.getProperty(Pack200.Packer.EFFORT))) {
            Utils.copyJarFile(in, out);
        } else {
            (new DoPack()).run(in, out);
        }
    } finally {
        Utils.currentInstance.set(null);
        if (tz != null) TimeZone.setDefault(tz);
        in.close();
    }
}
 

/**
 * Test 6 checks that 9am on Sunday 28 March 2004 converts to the timeline 
 * value and back again correctly.  Note that Saturday and Sunday are 
 * excluded from the timeline, so we expect the value to map to 9am on 
 * Monday 29 March 2004. This is during daylight saving.
 */
public void test6() {
    TimeZone savedZone = TimeZone.getDefault();
    TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
    Calendar cal = Calendar.getInstance(Locale.UK);
    cal.set(Calendar.YEAR, 2004);
    cal.set(Calendar.MONTH, Calendar.MARCH);
    cal.set(Calendar.DAY_OF_MONTH, 28);
    cal.set(Calendar.HOUR_OF_DAY, 9);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);
    Date date = cal.getTime();
    SegmentedTimeline timeline = getTimeline();      

    long value = timeline.toTimelineValue(date);   
    long ms = timeline.toMillisecond(value);
    Calendar cal2 = Calendar.getInstance(Locale.UK);
    cal2.setTime(new Date(ms));
    Date reverted = cal2.getTime();
  
    Calendar expectedReverted = Calendar.getInstance(Locale.UK);
    expectedReverted.set(Calendar.YEAR, 2004);
    expectedReverted.set(Calendar.MONTH, Calendar.MARCH);
    expectedReverted.set(Calendar.DAY_OF_MONTH, 29);
    expectedReverted.set(Calendar.HOUR_OF_DAY, 9);
    expectedReverted.set(Calendar.MINUTE, 0);
    expectedReverted.set(Calendar.SECOND, 0);
    expectedReverted.set(Calendar.MILLISECOND, 0);
  
    assertTrue(
        "test6", value == (900000 * 34 * 2) 
        && expectedReverted.getTime().getTime() == reverted.getTime()
    );
    TimeZone.setDefault(savedZone);
}
 

@Test(expectedExceptions = ZoneRulesException.class)
public void test_systemDefault_unableToConvert_unknownId() {
    TimeZone current = TimeZone.getDefault();
    try {
        TimeZone.setDefault(new SimpleTimeZone(127, "SomethingWeird"));
        ZoneId.systemDefault();
    } finally {
        TimeZone.setDefault(current);
    }
}
 

/**
 * Some checks for the getFirstMillisecond() method.
 */
@Test
public void testGetFirstMillisecond() {
    Locale saved = Locale.getDefault();
    Locale.setDefault(Locale.UK);
    TimeZone savedZone = TimeZone.getDefault();
    TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
    Week w = new Week(3, 1970);
    assertEquals(946800000L, w.getFirstMillisecond());
    Locale.setDefault(saved);
    TimeZone.setDefault(savedZone);
}
 

/**
 * Test 6 checks that 9am on Sunday 28 March 2004 converts to the timeline
 * value and back again correctly.  Note that Saturday and Sunday are
 * excluded from the timeline, so we expect the value to map to 9am on
 * Monday 29 March 2004. This is during daylight saving.
 */
@Test
public void test6() {
    TimeZone savedZone = TimeZone.getDefault();
    TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
    Calendar cal = Calendar.getInstance(Locale.UK);
    cal.set(Calendar.YEAR, 2004);
    cal.set(Calendar.MONTH, Calendar.MARCH);
    cal.set(Calendar.DAY_OF_MONTH, 28);
    cal.set(Calendar.HOUR_OF_DAY, 9);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);
    Date date = cal.getTime();
    SegmentedTimeline timeline = getTimeline();

    long value = timeline.toTimelineValue(date);
    long ms = timeline.toMillisecond(value);
    Calendar cal2 = Calendar.getInstance(Locale.UK);
    cal2.setTime(new Date(ms));
    Date reverted = cal2.getTime();

    Calendar expectedReverted = Calendar.getInstance(Locale.UK);
    expectedReverted.set(Calendar.YEAR, 2004);
    expectedReverted.set(Calendar.MONTH, Calendar.MARCH);
    expectedReverted.set(Calendar.DAY_OF_MONTH, 29);
    expectedReverted.set(Calendar.HOUR_OF_DAY, 9);
    expectedReverted.set(Calendar.MINUTE, 0);
    expectedReverted.set(Calendar.SECOND, 0);
    expectedReverted.set(Calendar.MILLISECOND, 0);

    assertTrue("test6", value == (900000 * 34 * 2)
            && expectedReverted.getTime().getTime() == reverted.getTime());
    TimeZone.setDefault(savedZone);
}
 

/**
 * Some checks for the getLastMillisecond() method.
 */
public void testGetLastMillisecond() {
    Locale saved = Locale.getDefault();
    Locale.setDefault(Locale.UK);
    TimeZone savedZone = TimeZone.getDefault();
    TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
    Year y = new Year(1970);
    // TODO: Check this result...
    assertEquals(31532399999L, y.getLastMillisecond());
    Locale.setDefault(saved);
    TimeZone.setDefault(savedZone);
}
 

/**
 * Some checks for the getLastMillisecond() method.
 */
public void testGetLastMillisecond() {
    Locale saved = Locale.getDefault();
    Locale.setDefault(Locale.UK);
    TimeZone savedZone = TimeZone.getDefault();
    TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
    Second s = new Second(1, 1, 1, 1, 1, 1970);
    assertEquals(61999L, s.getLastMillisecond());
    Locale.setDefault(saved);
    TimeZone.setDefault(savedZone);
}
 

public static void main(String[] args) {
    if (args.length == 1) {
        duration = Math.max(10, Integer.parseInt(args[0]));
    }
    Locale savedLocale = Locale.getDefault();
    TimeZone savedTimeZone = TimeZone.getDefault();

    TimeZone.setDefault(TimeZone.getTimeZone("US/Pacific"));
    Locale.setDefault(Locale.US);

    masterSdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");

    try {
        // Once it is used, DecimalFormat becomes not thread-safe.
        Date d = masterSdf.parse(TIME_STRING);

        new Bug6335238();
    } catch (Exception e) {
        System.err.println(e);
        err = true;
    } finally {
        TimeZone.setDefault(savedTimeZone);
        Locale.setDefault(savedLocale);

        if (err) {
            throw new RuntimeException("Failed: Multiple DateFormat instances didn't work correctly.");
        } else {
            System.out.println("Passed.");
        }
    }
}
 

/**
 * sets a TimeZone represented by the supplied ID string into all
 * of the parsers used by this server.
 *
 * @param serverTimeZone Time Id java.util.TimeZone id used by
 * the ftp server.  If null the client's local time zone is assumed.
 */
private void setServerTimeZone(String serverTimeZoneId) {
  TimeZone serverTimeZone = TimeZone.getDefault();
  if (serverTimeZoneId != null) {
    serverTimeZone = TimeZone.getTimeZone(serverTimeZoneId);
  }
  this.defaultDateFormat.setTimeZone(serverTimeZone);
  if (this.recentDateFormat != null) {
    this.recentDateFormat.setTimeZone(serverTimeZone);
  }
}
 

/**
 * Some checks for the getFirstMillisecond() method.
 */
public void testGetFirstMillisecond() {
    Locale saved = Locale.getDefault();
    Locale.setDefault(Locale.UK);
    TimeZone savedZone = TimeZone.getDefault();
    TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
    Hour h = new Hour(15, 1, 4, 2006);
    assertEquals(1143900000000L, h.getFirstMillisecond());
    Locale.setDefault(saved);
    TimeZone.setDefault(savedZone);
}
 

/**
 * Some checks for the getStart() method.
 */
@Test
public void testGetStart() {
    Locale saved = Locale.getDefault();
    Locale.setDefault(Locale.ITALY);
    TimeZone savedZone = TimeZone.getDefault();
    TimeZone.setDefault(TimeZone.getTimeZone("Europe/Rome"));
    Calendar cal = Calendar.getInstance(Locale.ITALY);
    cal.set(2006, Calendar.JANUARY, 16, 3, 47, 0);
    cal.set(Calendar.MILLISECOND, 0);
    Minute m = new Minute(47, 3, 16, 1, 2006);
    assertEquals(cal.getTime(), m.getStart());
    Locale.setDefault(saved);
    TimeZone.setDefault(savedZone);
}
 

public static void main(String[] args) {
    TimeZone defaultTimeZone = TimeZone.getDefault();
    int errors = 0;

    Calendar cal = new GregorianCalendar(BEGIN_YEAR, MARCH, 1);
    String[] tzids = TimeZone.getAvailableIDs();
    try {
        for (String id : tzids) {
            TimeZone tz = TimeZone.getTimeZone(id);
            if (!tz.useDaylightTime()) {
                continue;
            }
            TimeZone.setDefault(tz);

          dateloop:
            // Use future dates because sun.util.calendar.ZoneInfo
            // delegates offset transition calculations to a SimpleTimeZone
            // (after 2038 as of JDK7).
            for (int year = BEGIN_YEAR; year < END_YEAR; year++) {
                for (int month = MARCH; month <= NOVEMBER; month++) {
                    cal.set(year, month, 1, 15, 0, 0);
                    int maxDom = cal.getActualMaximum(DAY_OF_MONTH);
                    for (int dom = 1; dom <= maxDom; dom++) {
                        Date date = new Date(year - 1900, month, dom);
                        if (date.getYear()+1900 != year
                            || date.getMonth() != month
                            || date.getDate() != dom) {
                            System.err.printf("%s: got %04d-%02d-%02d, expected %04d-%02d-%02d%n",
                                              id,
                                              date.getYear() + 1900,
                                              date.getMonth() + 1,
                                              date.getDate(),
                                              year,
                                              month + 1,
                                              dom);
                            errors++;
                            break dateloop;
                        }
                    }
                }
            }
        }
    } finally {
        // Restore the default TimeZone.
        TimeZone.setDefault(defaultTimeZone);
    }
    if (errors > 0) {
        throw new RuntimeException("Transition test failed");
    }
}
 

/**
 * This method returns the number of milliseconds (UTC time) for today's date at midnight in
 * the local time zone. For example, if you live in California and the day is September 20th,
 * 2016 and it is 6:30 PM, it will return 1474329600000. Now, if you plug this number into an
 * Epoch time converter, you may be confused that it tells you this time stamp represents 8:00
 * PM on September 19th local time, rather than September 20th. We're concerned with the GMT
 * date here though, which is correct, stating September 20th, 2016 at midnight.
 *
 * As another example, if you are in Hong Kong and the day is September 20th, 2016 and it is
 * 6:30 PM, this method will return 1474329600000. Again, if you plug this number into an Epoch
 * time converter, you won't get midnight for your local time zone. Just keep in mind that we
 * are just looking at the GMT date here.
 *
 * This method will ALWAYS return the date at midnight (in GMT time) for the time zone you
 * are currently in. In other words, the GMT date will always represent your date.
 *
 * Since UTC / GMT time are the standard for all time zones in the world, we use it to
 * normalize our dates that are stored in the database. When we extract values from the
 * database, we adjust for the current time zone using time zone offsets.
 *
 * @return The number of milliseconds (UTC / GMT) for today's date at midnight in the local
 * time zone
 */
public static long getNormalizedUtcDateForToday() {

    /*
     * This number represents the number of milliseconds that have elapsed since January
     * 1st, 1970 at midnight in the GMT time zone.
     */
    long utcNowMillis = System.currentTimeMillis();

    /*
     * This TimeZone represents the device's current time zone. It provides us with a means
     * of acquiring the offset for local time from a UTC time stamp.
     */
    TimeZone currentTimeZone = TimeZone.getDefault();

    /*
     * The getOffset method returns the number of milliseconds to add to UTC time to get the
     * elapsed time since the epoch for our current time zone. We pass the current UTC time
     * into this method so it can determine changes to account for daylight savings time.
     */
    long gmtOffsetMillis = currentTimeZone.getOffset(utcNowMillis);

    /*
     * UTC time is measured in milliseconds from January 1, 1970 at midnight from the GMT
     * time zone. Depending on your time zone, the time since January 1, 1970 at midnight (GMT)
     * will be greater or smaller. This variable represents the number of milliseconds since
     * January 1, 1970 (GMT) time.
     */
    long timeSinceEpochLocalTimeMillis = utcNowMillis + gmtOffsetMillis;

    /* This method simply converts milliseconds to days, disregarding any fractional days */
    long daysSinceEpochLocal = TimeUnit.MILLISECONDS.toDays(timeSinceEpochLocalTimeMillis);

    /*
     * Finally, we convert back to milliseconds. This time stamp represents today's date at
     * midnight in GMT time. We will need to account for local time zone offsets when
     * extracting this information from the database.
     */
    long normalizedUtcMidnightMillis = TimeUnit.DAYS.toMillis(daysSinceEpochLocal);

    return normalizedUtcMidnightMillis;
}
 

@Override
public TimeZone getTimeZone()
{
  return TimeZone.getDefault();
}
 

public static void main(String[] args) {
    TimeZone UTC = TimeZone.getTimeZone("UTC");
    TimeZone initTz = TimeZone.getDefault();

    List<String> errors = new ArrayList<>();
    try {
        TimeZone.setDefault(TimeZone.getTimeZone("America/Los_Angeles"));
        for (Locale locale : DateFormat.getAvailableLocales()) {
            // exclude any locales which localize "UTC".
            String utc = UTC.getDisplayName(false, SHORT, locale);
            if (!"UTC".equals(utc)) {
                System.out.println("Skipping " + locale + " due to localized UTC name: " + utc);
                continue;
            }
            SimpleDateFormat fmt = new SimpleDateFormat("z", locale);
            try {
                Date date = fmt.parse("UTC");
                // Parsed one may not exactly be UTC. Universal, UCT, etc. are equivalents.
                if (!fmt.getTimeZone().getID().matches("(Etc/)?(UTC|Universal|UCT|Zulu)")) {
                    errors.add("timezone: " + fmt.getTimeZone().getID()
                               + ", locale: " + locale);
                }
            } catch (ParseException e) {
                errors.add("parse exception: " + e + ", locale: " + locale);
            }
        }
    } finally {
        // Restore the default time zone
        TimeZone.setDefault(initTz);
    }

    if (!errors.isEmpty()) {
        System.out.println("Got unexpected results:");
        for (String s : errors) {
            System.out.println("    " + s);
        }
        throw new RuntimeException("Test failed.");
    } else {
        System.out.println("Test passed.");
    }
}
 

/**
 * Constructs a new instance, based on the supplied date/time and
 * the default time zone.
 *
 * @param time  the date-time (<code>null</code> not permitted).
 *
 * @see #Hour(Date, TimeZone)
 */
public Hour(Date time) {
    // defer argument checking...
    this(time, TimeZone.getDefault(), Locale.getDefault());
}
 

/**
 * 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.
 *
 * @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;
}
 

/**
 * Constructs a new instance from the specified date/time and the default
 * time zone..
 *
 * @param time  the time (<code>null</code> not permitted).
 *
 * @see #Second(Date, TimeZone)
 */
public Second(Date time) {
    this(time, TimeZone.getDefault(), Locale.getDefault());
}
 

/**
 * Constructor which accepts a date value and a precision value. Valid precisions values for this type are:
 * <ul>
 * <li>{@link TemporalPrecisionEnum#YEAR}
 * <li>{@link TemporalPrecisionEnum#MONTH}
 * <li>{@link TemporalPrecisionEnum#DAY}
 * <li>{@link TemporalPrecisionEnum#SECOND}
 * <li>{@link TemporalPrecisionEnum#MILLI}
 * </ul>
 * 
 * @throws DataFormatException
 *             If the specified precision is not allowed for this type
 */
public DateTimeType(Date theDate, TemporalPrecisionEnum thePrecision) {
	super(theDate, thePrecision, TimeZone.getDefault());
}