Examples of com.ibm.icu.text.DateFormat

com.ibm.icu.text.DateFormat
DateFormat is an abstract class for date/time formatting subclasses which formats and parses dates or time in a language-independent manner. The date/time formatting subclass, such as SimpleDateFormat, allows for formatting (i.e., date -> text), parsing (text -> date), and normalization. The date is represented as a Date object or as the milliseconds since January 1, 1970, 00:00:00 GMT.
DateFormat provides many class methods for obtaining default date/time formatters based on the default or a given loacle and a number of formatting styles. The formatting styles include FULL, LONG, MEDIUM, and SHORT. More detail and examples of using these styles are provided in the method descriptions.
DateFormat helps you to format and parse dates for any locale. Your code can be completely independent of the locale conventions for months, days of the week, or even the calendar format: lunar vs. solar.
To format a date for the current Locale, use one of the static factory methods:
```
 myString = DateFormat.getDateInstance().format(myDate); 
```
If you are formatting multiple numbers, it is more efficient to get the format and use it multiple times so that the system doesn't have to fetch the information about the local language and country conventions multiple times.
```
 DateFormat df = DateFormat.getDateInstance(); for (int i = 0; i < a.length; ++i) { output.println(df.format(myDate[i]) + "; "); } 
```
To format a number for a different Locale, specify it in the call to getDateInstance().
```
 DateFormat df = DateFormat.getDateInstance(DateFormat.LONG, Locale.FRANCE); 
```
You can use a DateFormat to parse also.
```
 myDate = df.parse(myString); 
```
Use getDateInstance to get the normal date format for that country. There are other static factory methods available. Use getTimeInstance to get the time format for that country. Use getDateTimeInstance to get a date and time format. You can pass in different options to these factory methods to control the length of the result; from SHORT to MEDIUM to LONG to FULL. The exact result depends on the locale, but generally:
- SHORT is completely numeric, such as 12.13.52 or 3:30pm
- MEDIUM is longer, such as Jan 12, 1952
- LONG is longer, such as January 12, 1952 or 3:30:32pm
- FULL is pretty completely specified, such as Tuesday, April 12, 1952 AD or 3:30:42pm PST.
You can also set the time zone on the format if you wish. If you want even more control over the format or parsing, (or want to give your users more control), you can try casting the DateFormat you get from the factory methods to a SimpleDateFormat. This will work for the majority of countries; just remember to put it in a try block in case you encounter an unusual one.
You can also use forms of the parse and format methods with ParsePosition and FieldPosition to allow you to
- progressively parse through pieces of a string.
- align any particular field, or find out where it is for selection on the screen.
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 UFormat @see NumberFormat @see SimpleDateFormat @see com.ibm.icu.util.Calendar @see com.ibm.icu.util.GregorianCalendar @see com.ibm.icu.util.TimeZone @author Mark Davis, Chen-Lieh Huang, Alan Liu @stable ICU 2.0

    }


    {
        // limits
        JapaneseCalendar cal = new JapaneseCalendar();
        DateFormat fmt = cal.getDateTimeFormat(DateFormat.FULL, DateFormat.FULL, Locale.ENGLISH);


        cal.set(Calendar.ERA, JapaneseCalendar.MEIJI);
        logln("date: " + cal.getTime());
        logln("min era: " + cal.getMinimum(Calendar.ERA));
        logln("min year: " + cal.getMinimum(Calendar.YEAR));
        cal.set(Calendar.YEAR, cal.getActualMaximum(Calendar.YEAR));
        logln("date: " + fmt.format(cal.getTime()));
        cal.add(Calendar.YEAR, 1);
        logln("date: " + fmt.format(cal.getTime()));
    }


    {
        // data
        JapaneseCalendar cal = new JapaneseCalendar(1868, Calendar.JANUARY, 1);
        Date time = cal.getTime();


        String[] calendarLocales = {
        "en", "ja_JP"
        };


        String[] formatLocales = {
        "en", "ja"
        };
        for (int i = 0; i < calendarLocales.length; ++i) {
            String calLocName = calendarLocales[i];
            Locale calLocale = LocaleUtility.getLocaleFromName(calLocName);
            cal = new JapaneseCalendar(calLocale);


            for (int j = 0; j < formatLocales.length; ++j) {
                String locName = formatLocales[j];
                Locale formatLocale = LocaleUtility.getLocaleFromName(locName);
                DateFormat format = DateFormat.getDateTimeInstance(cal, DateFormat.FULL, DateFormat.FULL, formatLocale);
                logln(calLocName + "/" + locName + " --> " + format.format(time));
            }
        }
    }
    }

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    public void Test3860()
    {
        ULocale loc = new ULocale("ja_JP@calendar=japanese");
        Calendar cal = new JapaneseCalendar(loc);
        DateFormat enjformat = cal.getDateTimeFormat(0,0,new ULocale("en_JP@calendar=japanese"));
        DateFormat format = cal.getDateTimeFormat(0,0,loc);
        ((SimpleDateFormat)format).applyPattern("y.M.d");  // Note: just 'y' doesn't work here.
        ParsePosition pos = new ParsePosition(0);
        Date aDate = format.parse("1.1.9", pos); // after the start of heisei accession.  Jan 1, 1H wouldn't work  because it is actually showa 64
        String inEn = enjformat.format(aDate);


        cal.clear();
        cal.setTime(aDate);
        int gotYear = cal.get(Calendar.YEAR);

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        }
    }


    public void Test5345parse() {
        // Test parse with incomplete information
        DateFormat fmt2= DateFormat.getDateInstance(); //DateFormat.LONG, Locale.US);
        JapaneseCalendar c = new JapaneseCalendar(TimeZone.getDefault(), new ULocale("en_US"));
        SimpleDateFormat fmt = (SimpleDateFormat)c.getDateTimeFormat(1,1,new ULocale("en_US@calendar=japanese"));
        fmt.applyPattern("G y");
        logln("fmt's locale = " + fmt.getLocale(ULocale.ACTUAL_LOCALE));
        //SimpleDateFormat fmt = new SimpleDateFormat("G y", new Locale("en_US@calendar=japanese"));
        long aDateLong = -3197120400000L 
            + 3600000L; // compensate for DST
        Date aDate = new Date(aDateLong); //08 Sept 1868
        logln("aDate: " + aDate.toString() +", from " + aDateLong);
        String str;
        str = fmt2.format(aDate);
        logln("Test Date: " + str);
        str = fmt.format(aDate);
        logln("as Japanese Calendar: " + str);
        String expected = "Meiji 1";
        if(!str.equals(expected)) {

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        for (int day = 1; day < 3; ++day) {
            cal.set(1, 0, day);
            logln("[" + day + "] " + (cal.getTimeInMillis()/MILLIS_IN_DAY));
        }


        DateFormat fmt = cal.getDateTimeFormat(DateFormat.LONG, 0, Locale.getDefault());


        logln("\nswitchover in 1582");
        cal.set(1582, 9, 4);
        logln(fmt.format(cal));
        cal.add(Calendar.DATE, 1);
        logln(fmt.format(cal));
        cal.set(Calendar.JULIAN_DAY, 1721426);
        logln(fmt.format(cal));


        logln("\nlate switchover - proleptic Julian");
        cal.set(1582, 9, 4);
        cal.setGregorianChange(new Date(Long.MAX_VALUE));
        logln(fmt.format(cal));
        cal.add(Calendar.DATE, 1);
        logln(fmt.format(cal));
        cal.set(Calendar.JULIAN_DAY, 1721426);
        logln(fmt.format(cal));


        logln("\nearly switchover - proleptic Gregorian");
        cal.set(1582, 9, 4);
        cal.setGregorianChange(new Date(Long.MIN_VALUE));
        logln(fmt.format(cal));
        cal.add(Calendar.DATE, 1);
        logln(fmt.format(cal));
        cal.set(Calendar.JULIAN_DAY, 1721426);
        logln(fmt.format(cal));
    }

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                cal = new EthiopicCalendar(calLocale);


                for (int j = 0; j < formatLocales.length; ++j) {
                    String locName = formatLocales[j];
                    Locale formatLocale = LocaleUtility.getLocaleFromName(locName);
                    DateFormat format = DateFormat.getDateTimeInstance(cal, DateFormat.FULL, DateFormat.FULL, formatLocale);
                    logln(calLocName + "/" + locName + " --> " + format.format(time));
                }
            }
        }
    }

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    public void TestDateFormat() {
        GlobalizationPreferences gp = new GlobalizationPreferences();


        String pattern;
        DateFormat df;


        // Set unsupported locale - ach
        logln("Set locale - ach");
        gp.setLocale(new ULocale("ach"));


        // Date - short
        df = gp.getDateFormat(GlobalizationPreferences.DF_SHORT, GlobalizationPreferences.DF_NONE);
        pattern = ((SimpleDateFormat)df).toPattern();
        // root pattern must be used
        if (!pattern.equals("yyyy-MM-dd")) {
            errln("FAIL: SHORT date pattern is " + pattern + " Expected: yyyy-MM-dd");
        }


        // Set locale - fr, fr_CA, fr_FR
        ArrayList lcls = new ArrayList(3);
        lcls.add(new ULocale("fr"));
        lcls.add(new ULocale("fr_CA"));
        lcls.add(new ULocale("fr_FR"));
        logln("Set locales - fr, fr_CA, fr_FR");
        gp.setLocales(lcls);
        // Date - short
        df = gp.getDateFormat(GlobalizationPreferences.DF_SHORT, GlobalizationPreferences.DF_NONE);
        pattern = ((SimpleDateFormat)df).toPattern();
        // fr_CA pattern must be used
        if (!pattern.equals("yy-MM-dd")) {
            errln("FAIL: SHORT date pattern is " + pattern + " Expected: yy-MM-dd");
        }




        // Set locale - en_GB
        logln("Set locale - en_GB");
        gp.setLocale(new ULocale("en_GB"));
        
        // Date - full
        df = gp.getDateFormat(GlobalizationPreferences.DF_FULL, GlobalizationPreferences.DF_NONE);
        pattern = ((SimpleDateFormat)df).toPattern();
        if (!pattern.equals("EEEE, d MMMM y")) {
            errln("FAIL: FULL date pattern is " + pattern + " Expected: EEEE, d MMMM y");
        }


        // Date - long
        df = gp.getDateFormat(GlobalizationPreferences.DF_LONG, GlobalizationPreferences.DF_NONE);
        pattern = ((SimpleDateFormat)df).toPattern();
        if (!pattern.equals("d MMMM y")) {
            errln("FAIL: LONG date pattern is " + pattern + " Expected: d MMMM y");
        }


        // Date - medium
        df = gp.getDateFormat(GlobalizationPreferences.DF_MEDIUM, GlobalizationPreferences.DF_NONE);
        pattern = ((SimpleDateFormat)df).toPattern();
        if (!pattern.equals("d MMM y")) {
            errln("FAIL: MEDIUM date pattern is " + pattern + " Expected: d MMM y");
        }


        // Date - short
        df = gp.getDateFormat(GlobalizationPreferences.DF_SHORT, GlobalizationPreferences.DF_NONE);
        pattern = ((SimpleDateFormat)df).toPattern();
        if (!pattern.equals("dd/MM/yyyy")) {
            errln("FAIL: SHORT date pattern is " + pattern + " Expected: dd/MM/yyyy");
        }


        // Time - full
        df = gp.getDateFormat(GlobalizationPreferences.DF_NONE, GlobalizationPreferences.DF_FULL);
        pattern = ((SimpleDateFormat)df).toPattern();
        if (!pattern.equals("HH:mm:ss zzzz")) {
            errln("FAIL: FULL time pattern is " + pattern + " Expected: HH:mm:ss zzzz");
        }


        // Time - long
        df = gp.getDateFormat(GlobalizationPreferences.DF_NONE, GlobalizationPreferences.DF_LONG);
        pattern = ((SimpleDateFormat)df).toPattern();
        if (!pattern.equals("HH:mm:ss z")) {
            errln("FAIL: LONG time pattern is " + pattern + " Expected: HH:mm:ss z");
        }


        // Time - medium
        df = gp.getDateFormat(GlobalizationPreferences.DF_NONE, GlobalizationPreferences.DF_MEDIUM);
        pattern = ((SimpleDateFormat)df).toPattern();
        if (!pattern.equals("HH:mm:ss")) {
            errln("FAIL: MEDIUM time pattern is " + pattern + " Expected: HH:mm:ss");
        }


        // Time - short
        df = gp.getDateFormat(GlobalizationPreferences.DF_NONE, GlobalizationPreferences.DF_SHORT);
        pattern = ((SimpleDateFormat)df).toPattern();
        if (!pattern.equals("HH:mm")) {
            errln("FAIL: SHORT time pattern is " + pattern + " Expected: HH:mm");
        }


        // Date/Time - full
        df = gp.getDateFormat(GlobalizationPreferences.DF_FULL, GlobalizationPreferences.DF_FULL);
        pattern = ((SimpleDateFormat)df).toPattern();
        if (!pattern.equals("EEEE, d MMMM y HH:mm:ss zzzz")) {
            errln("FAIL: FULL date/time pattern is " + pattern + " Expected: EEEE, d MMMM y HH:mm:ss zzzz");
        }


        // Invalid style
        boolean illegalArg = false;
        try {
            df = gp.getDateFormat(-1, GlobalizationPreferences.DF_NONE);
        } catch (IllegalArgumentException iae) {
            logln("Illegal date style -1");
            illegalArg = true;
        }
        if (!illegalArg) {
            errln("FAIL: getDateFormat() must throw IllegalArgumentException for dateStyle -1");
        }


        illegalArg = false;
        try {
            df = gp.getDateFormat(GlobalizationPreferences.DF_NONE, GlobalizationPreferences.DF_NONE);
        } catch (IllegalArgumentException iae) {
            logln("Illegal style - dateStyle:DF_NONE / timeStyle:DF_NONE");
            illegalArg = true;
        }
        if (!illegalArg) {
            errln("FAIL: getDateFormat() must throw IllegalArgumentException for dateStyle:DF_NONE/timeStyle:DF_NONE");
        }


        // Set explicit time zone
        logln("Set timezone - America/Sao_Paulo");
        TimeZone tz = TimeZone.getTimeZone("America/Sao_Paulo");
        gp.setTimeZone(tz);
        df = gp.getDateFormat(GlobalizationPreferences.DF_LONG, GlobalizationPreferences.DF_MEDIUM);
        String tzid = df.getTimeZone().getID();
        if (!tzid.equals("America/Sao_Paulo")) {
            errln("FAIL: The DateFormat instance must use timezone America/Sao_Paulo");
        }


        // Set explicit calendar
        logln("Set calendar - japanese");
        Calendar jcal = new JapaneseCalendar();
        jcal.setTimeZone(TimeZone.getTimeZone("Asia/Tokyo"));
        gp.setCalendar(jcal);
        df = gp.getDateFormat(GlobalizationPreferences.DF_SHORT, GlobalizationPreferences.DF_SHORT);
        Calendar dfCal = df.getCalendar();
        if (!(dfCal instanceof JapaneseCalendar)) {
            errln("FAIL: The DateFormat instance must use Japanese calendar");
        }
        // TimeZone must be still America/Sao_Paulo
        tzid = df.getTimeZone().getID();
        if (!tzid.equals("America/Sao_Paulo")) {
            errln("FAIL: The DateFormat instance must use timezone America/Sao_Paulo");
        }


        // Set explicit DateFormat
        logln("Set explicit date format - full date");
        DateFormat customFD = DateFormat.getDateInstance(new IslamicCalendar(), DateFormat.FULL, new ULocale("ar_SA"));
        customFD.setTimeZone(TimeZone.getTimeZone("Asia/Riyadh"));
        gp.setDateFormat(GlobalizationPreferences.DF_FULL, GlobalizationPreferences.DF_NONE, customFD);
        df = gp.getDateFormat(GlobalizationPreferences.DF_FULL, GlobalizationPreferences.DF_NONE);
        dfCal = df.getCalendar();
        if (!(dfCal instanceof IslamicCalendar)) {
            errln("FAIL: The DateFormat instance must use Islamic calendar");
        }
        // TimeZone in the custom DateFormat is overridden by GP's timezone setting
        tzid = df.getTimeZone().getID();
        if (!tzid.equals("America/Sao_Paulo")) {
            errln("FAIL: The DateFormat instance must use timezone America/Sao_Paulo");
        }


        // Freeze
        logln("Freeze this object");
        gp.freeze();
        DateFormat customLD = DateFormat.getDateInstance(new BuddhistCalendar(), DateFormat.LONG, new ULocale("th"));
        customLD.setTimeZone(TimeZone.getTimeZone("Asia/Bangkok"));
        boolean isFrozen = false;
        try {
            gp.setDateFormat(GlobalizationPreferences.DF_LONG, GlobalizationPreferences.DF_NONE, customLD);
        } catch (UnsupportedOperationException uoe) {
            logln("setDateFormat is blocked");

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     * Test method for 'com.ibm.icu.util.Calendar.getDateTimeFormat(int, int, Locale)'
     */
    public void testGetDateTimeFormatIntIntLocale() {
        Calendar cal = Calendar.getInstance();
        cal.set(1990, 8, 16, 20, 3);
        DateFormat df = cal.getDateTimeFormat(DateFormat.LONG, DateFormat.SHORT, Locale.US);
        assertEquals("September 16, 1990 8:03 PM", df.format(cal));
    }

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     * Test method for 'com.ibm.icu.util.Calendar.getDateTimeFormat(int, int, ULocale)'
     */
    public void testGetDateTimeFormatIntIntULocale() {
        Calendar cal = Calendar.getInstance();
        cal.set(1990, 8, 16, 20, 3);
        DateFormat df = cal.getDateTimeFormat(DateFormat.LONG, DateFormat.SHORT, ULocale.US);
        assertEquals("September 16, 1990 8:03 PM", df.format(cal));
    }

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    public void testGetFormats() {
        MessageFormat mf = new MessageFormat(pattern, Locale.US);
        Format[] formats = mf.getFormats();
        NumberFormat nf = NumberFormat.getNumberInstance(Locale.US);
        assertEquals(formats[0], nf);
        DateFormat tf = DateFormat.getTimeInstance(DateFormat.SHORT, Locale.US);
        assertEquals(formats[1], tf);
        DateFormat df = DateFormat.getDateInstance(DateFormat.DEFAULT, Locale.US);
        assertEquals(formats[2], df);
    }

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                                ((ListOfCharValueNode)sourceVN).getStringValue() : 
                                ((LiteralValueNode)sourceVN).getStringValue();


            if (handlerClass.equals(RelativeDateValueNode.class)) {


                DateFormat dateFormat = RelativeTemporalValueNode.getDateFormat(DateFormat.FULL, -1);


                try {


                    newValue = dateFormat.parse(stringVal);


                } catch (ParseException pe) {


                    // Okay, can't parse.  Don't transform.
                }


            } else if (handlerClass.equals(RelativeTimeValueNode.class)) {


                DateFormat timeFormat = RelativeTemporalValueNode.getDateFormat(-1, DateFormat.MEDIUM);


                try {


                    newValue = timeFormat.parse(stringVal);


                } catch (ParseException pe) {


                    // Okay, can't parse.  Don't transform.
                }


            } else if (handlerClass.equals(RelativeDateTimeValueNode.class)) {


                DateFormat dateTimeFormat = RelativeTemporalValueNode.getDateFormat(DateFormat.FULL, DateFormat.MEDIUM);


                try {


                    newValue = dateTimeFormat.parse(stringVal);


                } catch (ParseException pe) {


                    // Okay, can't parse.  Don't transform.
                }

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Examples of com.ibm.icu.text.DateFormat

Synchronization

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