Examples of com.ibm.icu.text.SimpleDateFormat

com.ibm.icu.text.SimpleDateFormat
at the current time. SimpleDateFormat formatter = new SimpleDateFormat ("yyyy.MM.dd G 'at' hh:mm:ss a zzz"); Date currentTime_1 = new Date(); String dateString = formatter.format(currentTime_1);
// Parse the previous string back into a Date. ParsePosition pos = new ParsePosition(0); Date currentTime_2 = formatter.parse(dateString, pos); In the example, the time value currentTime_2 obtained from parsing will be equal to currentTime_1. However, they may not be equal if the am/pm marker 'a' is left out from the format pattern while the "hour in am/pm" pattern symbol is used. This information loss can happen when formatting the time in PM.
When parsing a date string using the abbreviated year pattern ("yy"), SimpleDateFormat must interpret the abbreviated year relative to some century. It does this by adjusting dates to be within 80 years before and 20 years after the time the SimpleDateFormat instance is created. For example, using a pattern of "MM/dd/yy" and a SimpleDateFormat instance created on Jan 1, 1997, the string "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64" would be interpreted as May 4, 1964. During parsing, only strings consisting of exactly two digits, as defined by {@link java.lang.Character#isDigit(char)}, will be parsed into the default century. Any other numeric string, such as a one digit string, a three or more digit string, or a two digit string that isn't all digits (for example, "-1"), is interpreted literally. So "01/02/3" or "01/02/003" are parsed, using the same pattern, as Jan 2, 3 AD. Likewise, "01/02/-3" is parsed as Jan 2, 4 BC.
If the year pattern does not have exactly two 'y' characters, the year is interpreted literally, regardless of the number of digits. So using the pattern "MM/dd/yyyy", "01/11/12" parses to Jan 11, 12 A.D.
When numeric fields abut one another directly, with no intervening delimiter characters, they constitute a run of abutting numeric fields. Such runs are parsed specially. For example, the format "HHmmss" parses the input text "123456" to 12:34:56, parses the input text "12345" to 1:23:45, and fails to parse "1234". In other words, the leftmost field of the run is flexible, while the others keep a fixed width. If the parse fails anywhere in the run, then the leftmost field is shortened by one character, and the entire run is parsed again. This is repeated until either the parse succeeds or the leftmost field is one character in length. If the parse still fails at that point, the parse of the run fails.
For time zones that have no names, use strings GMT+hours:minutes or GMT-hours:minutes.
The calendar defines what is the first day of the week, the first week of the year, whether hours are zero based or not (0 vs 12 or 24), and the time zone. There is one common decimal format to handle all the numbers; the digit count is handled programmatically according to the pattern.
Synchronization
Date formats are not synchronized. It is recommended to create separate format instances for each thread. If multiple threads access a format concurrently, it must be synchronized externally. @see com.ibm.icu.util.Calendar @see com.ibm.icu.util.GregorianCalendar @see com.ibm.icu.util.TimeZone @see DateFormat @see DateFormatSymbols @see DecimalFormat @author Mark Davis, Chen-Lieh Huang, Alan Liu @stable ICU 2.0

    private void expect(String[] data, int data_length) {
        int i = 1;
        while (i<data_length) {
            String locName = data[i++];
            ULocale loc = new ULocale(locName);
            SimpleDateFormat ref = new SimpleDateFormat(data[0], loc);
            // 'f'
            String datestr = data[i++];
            String datestr_2 = data[i++];
            Date date, date_2;
            try {
                date = ref.parse(datestr);
                date_2 = ref.parse(datestr_2);
            } catch ( ParseException e ) {
                errln("parse exception" + e);
                continue;
            }
            DateInterval dtitv = new DateInterval(date.getTime(),

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    private void expectUserDII(String[] data, int data_length) {
        int i = 1;
        while (i<data_length) {
            String locName = data[i++];
            ULocale loc = new ULocale(locName);
            SimpleDateFormat ref = new SimpleDateFormat(data[0], loc);
            // 'f'
            String datestr = data[i++];
            String datestr_2 = data[i++];
            Date date, date_2;
            try {
                date = ref.parse(datestr);
                date_2 = ref.parse(datestr_2);
            } catch ( ParseException e ) {
                errln("parse exception" + e);
                continue;
            }
            DateInterval dtitv = new DateInterval(date.getTime(),

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    private void expectUserCLDR(String[] data, int data_length) {
        int i = 1;
        while (i<data_length) {
            String locName = data[i++];
            ULocale loc = new ULocale(locName);
            SimpleDateFormat ref = new SimpleDateFormat(data[0], loc);
            // 'f'
            String datestr = data[i++];
            String datestr_2 = data[i++];
            Date date, date_2;
            try {
                date = ref.parse(datestr);
                date_2 = ref.parse(datestr_2);
            } catch ( ParseException e ) {
                errln("parse exception" + e);
                continue;
            }
            DateInterval dtitv = new DateInterval(date.getTime(),

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            "EEEEEdM",
        };


        int i = 0;


        SimpleDateFormat ref = new SimpleDateFormat(data[i++], loc);


        while (i<data_length) {
            // 'f'
            String datestr = data[i++];
            String datestr_2 = data[i++];
            Date date;
            Date date_2;
            try {
                date = ref.parse(datestr);
                date_2 = ref.parse(datestr_2);
            } catch ( ParseException e ) {
                errln("parse exception" + e);
                continue;
            }
            DateInterval dtitv = new DateInterval(date.getTime(), date_2.getTime());


            for ( int skeletonIndex = 0; 
                  skeletonIndex < skeleton.length; 
                  ++skeletonIndex ) {
                String oneSkeleton = skeleton[skeletonIndex];
                // need special handle of "Thai" since the default calendar
                // of "Thai" is "Budd", not "Gregorian".
                DateIntervalFormat dtitvfmt = DateIntervalFormat.getInstance(oneSkeleton, loc);
                /*
                if ( locName.equals("th") ) {
                    // reset calendar to be Gregorian
                    GregorianCalendar gregCal = new GregorianCalendar(loc);
                    DateFormat dformat = dtitvfmt.getDateFormat();
                    DateFormat newOne = (DateFormat)dformat.clone();
                    newOne.setCalendar(gregCal);
                    dtitvfmt.setDateFormat(newOne);
                }
                */
                dtitvfmt.format(dtitv);
            }




            // test interval format by algorithm 
            for ( int style = DateFormat.FULL; style  < 4; ++style ) {
                SimpleDateFormat dtfmt = (SimpleDateFormat) DateFormat.getDateInstance(style, loc);
                FieldPosition pos = new FieldPosition(0);
                StringBuffer str = new StringBuffer("");
                Calendar fromCalendar = (Calendar) dtfmt.getCalendar().clone();
                Calendar toCalendar = (Calendar) dtfmt.getCalendar().clone();
                fromCalendar.setTimeInMillis(dtitv.getFromDate());
                toCalendar.setTimeInMillis(dtitv.getToDate());
                dtfmt.intervalFormatByAlgorithm(fromCalendar, toCalendar, str, pos);
            } 
        } 
    }

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            updateMonthName();
        }


        private void updateMonthName()
        {
            SimpleDateFormat f = new SimpleDateFormat("MMMM yyyyy",
                                                        calendarPanel.getDisplayLocale());
            f.setCalendar(calendarPanel.getCalendar());
            f.setTimeZone(new SimpleTimeZone(0, "UTC"));        // JDK 1.1.2 workaround
            monthLabel.setText( f.format( calendarPanel.firstOfMonth() ));
        }

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        diffSet.clear();
        if (!toSet.matches(toCalendar, diffSet)) {
            String diffs = diffSet.diffFrom(toSet);
            errln((String)"FAIL: "+thisString+", Differences: "+ diffs);
            DateFormat fmt = new SimpleDateFormat(new String("EEE MMM dd yyyy G"));
            String fromString = fmt.format(fromTime);
            logln("Source Time: "+fromString+", Source Calendar: "
                    +fromCalendar.getType());
        } else {
            logln("PASS: "+thisString+" match.");
        }

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    }


    // basic check to see that we print out eras ok
    // eventually should modify to use locale strings and formatter appropriate to coptic calendar
    public void TestEraStart() {
        SimpleDateFormat fmt = new SimpleDateFormat("EEE MMM dd, yyyy GG");
        SimpleDateFormat copticFmt = new SimpleDateFormat("EEE MMM dd, yyyy GG");
        copticFmt.setCalendar(new CopticCalendar());


        CopticCalendar cal = new CopticCalendar(1, 0, 1);
        assertEquals("Coptic Date", "Fri Jan 01, 0001 AD", copticFmt.format(cal));
        assertEquals("Gregorian Date", "Fri Aug 29, 0284 AD", fmt.format(cal.getTime()));


        cal.set(Calendar.ERA, 0);
        cal.set(Calendar.YEAR, 1);
        assertEquals("Coptic Date", "Thu Jan 01, 0001 BC", copticFmt.format(cal));
        assertEquals("Gregorian Date", "Thu Aug 30, 0283 AD", fmt.format(cal.getTime()));
    }

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            errln("FAIL: no DateFormat");
            return;
        }


        // Assume it's a SimpleDateFormat and get some info
        SimpleDateFormat s = (SimpleDateFormat) fFormat;
        logln(fTestName + " Pattern " + s.toPattern());
    }

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        for (int j = 0; j < locales.length; ++j) {
            ULocale locale = new ULocale(locales[j]);
            for (int i = 0; i < timezones.length; ++i) {
                TimeZone tz = TimeZone.getTimeZone(timezones[i]);
                String displayName0 = tz.getDisplayName(locale); // doesn't work???
                SimpleDateFormat dt = new SimpleDateFormat("vvvv", locale);
                dt.setTimeZone(tz);
                String displayName1 = dt.format(now);  // date value _does_ matter if we fallback to GMT
                logln(locale.getDisplayName() + ", " + tz.getID() + ": " + displayName0);
                if (!displayName1.equals(displayName0)) {
                    errln(locale.getDisplayName() + ", " + tz.getID() + 
                          ": expected " + displayName1 + " but got: " + displayName0);
                }

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        this.localizedPatterns = new LocaleMap();
        this.lenient = true;
    }


    public ConversionResult convertFromString(String value, Locale locale, Convertor.FormatCache formatCache) {
        SimpleDateFormat dateFormat = getDateFormat(locale, formatCache);
        try {
            return new ConversionResult(dateFormat.parse(value));
        } catch (ParseException e) {
            return ConversionResult.create("date." + this.variant);
        }
    }

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Examples of com.ibm.icu.text.SimpleDateFormat

Synchronization

Related Classes of com.ibm.icu.text.SimpleDateFormat