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

        return val;
    }


    public static String formatDate(Object data) {


        SimpleDateFormat dateFormat = new SimpleDateFormat(
                "yyyy-MM-dd'T'HH:mm:ss");
        return dateFormat.format((Date) data);


    }

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    private static final String kMILLIS = "MILLIS=";
    private static final String kRELATIVE_MILLIS = "RELATIVE_MILLIS=";
    private static final String kRELATIVE_ADD = "RELATIVE_ADD:";
    
    private void testConvertDate(TestDataModule.TestData testData, DataMap  settings, boolean fmt) {
        DateFormat basicFmt = new SimpleDateFormat("EEE MMM dd yyyy / YYYY'-W'ww-ee");


        int n = 0;
        for (Iterator iter = testData.getDataIterator(); iter.hasNext();) {
            ++n;
            long now = System.currentTimeMillis();
            DataMap currentCase = (DataMap) iter.next();
            String caseString = "["+testData.getName()+"#"+n+(fmt?"format":"parse")+"]";
            
            String locale = currentCase.getString("locale");
            String spec = currentCase.getString("spec");
            String date = currentCase.getString("date");
            String str = currentCase.getString("str");
            
            Date fromDate = null;
            boolean useDate = false;
            
            ULocale loc = new ULocale(locale);
            String pattern = null;
//            boolean usePattern = false;
            DateFormat format = null;
            DateTimeStyleSet styleSet;
            CalendarFieldsSet fromSet = null;
            
            // parse 'spec'  - either 'PATTERN=yy mm dd' or 'DATE=x,TIME=y'
            if(spec.startsWith(kPATTERN)) {
                pattern = spec.substring(kPATTERN.length());
//                usePattern = true;
                format = new SimpleDateFormat(pattern, loc);
            } else {
                styleSet = new DateTimeStyleSet();
                styleSet.parseFrom(spec);
                format = DateFormat.getDateTimeInstance(styleSet.getDateStyle(), styleSet.getTimeStyle(), loc);
            }


            Calendar cal = Calendar.getInstance(loc);
            
            // parse 'date' - either 'MILLIS=12345' or  a CalendarFieldsSet
            if(date.startsWith(kMILLIS)) {
                useDate = true;
                fromDate = new Date(Long.parseLong(date.substring(kMILLIS.length())));
            } else if(date.startsWith(kRELATIVE_MILLIS)) {
                useDate = true;
                fromDate = new Date(now+Long.parseLong(date.substring(kRELATIVE_MILLIS.length())));
            } else if(date.startsWith(kRELATIVE_ADD)) {
                String add = date.substring(kRELATIVE_ADD.length()); // "add" is a string indicating which fields to add
                CalendarFieldsSet addSet = new CalendarFieldsSet();
                addSet.parseFrom(add);
                useDate = true;
                cal.clear();
                cal.setTimeInMillis(now);


                /// perform op on 'to calendar'
                for (int q=0; q<addSet.fieldCount(); q++) {
                    if (addSet.isSet(q)) {
                         cal.add(q,addSet.get(q));
                    }
                }


                fromDate = cal.getTime();
            } else {
                fromSet = new CalendarFieldsSet();
                fromSet.parseFrom(date);
            }
            
            // run the test
            if(fmt) {
                StringBuffer output = new StringBuffer();
                cal.clear();
                FieldPosition pos = new FieldPosition(0);
                if(useDate) {
                    output = format.format(fromDate, output, pos);
                } else {
                    fromSet.setOnCalendar(cal);
                    format.format(cal, output, pos);
                }
                
                if(output.toString().equals(str)) {
                    logln(caseString + " Success - strings match: " + output);
                } else {
                    errln(caseString + " FAIL: got " + output + " expected " + str);
                }
            } else { // parse
                cal.clear();
                ParsePosition pos = new ParsePosition(0);
                format.parse(str, cal, pos);
                if(useDate) {
                    Date gotDate = cal.getTime(); 
                    if(gotDate.equals(fromDate)) {
                        logln(caseString + " SUCCESS: got=parse="+str);
                    } else {
                        errln(caseString + " FAIL: parsed " + str + " but got " + 
                                basicFmt.format(gotDate) + " - " + gotDate + "  expected " + 
                                basicFmt.format(fromDate));
                    }
                } else  {
                    CalendarFieldsSet diffSet = new CalendarFieldsSet();
                    if(!fromSet.matches(cal, diffSet)) {
                        String diffs = diffSet.diffFrom(fromSet);

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        int offset, hours, minutes, seconds;
        /*
         * Instantiate a SimpleDateFormat set up to produce a full time
         zone name.
         */
        SimpleDateFormat sdf = new SimpleDateFormat("zzzz");
        /*
         * A String array for the time zone ids.
         */
    
        final String[] ids = TimeZone.getAvailableIDs();
        int ids_length = ids.length; //when fixed the bug should comment it out
    
        /*
         * How many ids do we have?
         */
        logln("Time Zone IDs size:" + ids_length);
        /*
         * Column headings (sort of)
         */
        logln("Ordinal ID offset(h:m) name");
        /*
         * Loop through the tzs.
         */
        Date today = new Date();
        Calendar cal = Calendar.getInstance();
        for (int i = 0; i < ids_length; i++) {
            logln(i + " " + ids[i]);
            TimeZone ttz = TimeZone.getTimeZone(ids[i]);
            // offset = ttz.getRawOffset();
            cal.setTimeZone(ttz);
            cal.setTime(today);
            offset = cal.get(Calendar.ZONE_OFFSET) + cal.get(Calendar.DST_OFFSET);
            // logln(i + " " + ids[i] + " offset " + offset);
            String sign = "+";
            if (offset < 0) {
                sign = "-";
                offset = -offset;
            }
            hours = offset / 3600000;
            minutes = (offset % 3600000) / 60000;
            seconds = (offset % 60000) / 1000;
            String dstOffset = sign + (hours < 10 ? "0" : "") + hours
                    + ":" + (minutes < 10 ? "0" : "") + minutes; 
            if (seconds != 0) {
                dstOffset += ":" + (seconds < 10 ? "0" : "") + seconds;
            }
            /*
             * Instantiate a date so we can display the time zone name.
             */
            sdf.setTimeZone(ttz);
            /*
             * Format the output.
             */
            StringBuffer fmtOffset = new StringBuffer("");
            FieldPosition pos = new FieldPosition(0);
            
            try {
                fmtOffset = sdf.format(today, fmtOffset, pos);
            } catch (Exception e) {            
                logln("Exception:" + e);
                continue;
            }
            // UnicodeString fmtOffset = tzS.toString();

View Full Code Here

    /**
     * Test the parsing of 2-digit years.
     */
    public void TestTwoDigitYearDSTParse() {
    
        SimpleDateFormat fullFmt = new SimpleDateFormat("EEE MMM dd HH:mm:ss.SSS zzz yyyy G"); 
        SimpleDateFormat fmt = new SimpleDateFormat("dd-MMM-yy h:mm:ss 'o''clock' a z", Locale.ENGLISH); 
        String s = "03-Apr-04 2:20:47 o'clock AM PST";
    
        /*
         * SimpleDateFormat(pattern, locale) Construct a SimpleDateDateFormat using
         * the given pattern, the locale and using the TimeZone.getDefault();
         * So it need to add the timezone offset on hour field. 
         * ps. the Method Calendar.getTime() used by SimpleDateFormat.parse() always 
         * return Date value with TimeZone.getDefault() [Richard/GCL]
         */
        
        TimeZone defaultTZ = TimeZone.getDefault();
        TimeZone PST = TimeZone.getTimeZone("PST");
        int defaultOffset = defaultTZ.getRawOffset();
        int PSTOffset = PST.getRawOffset();
        int hour = 2 + (defaultOffset - PSTOffset) / (60*60*1000);
        // hour is the expected hour of day, in units of seconds
        hour = ((hour < 0) ? hour + 24 : hour) * 60*60;
        try {
            Date d = fmt.parse(s);
            Calendar cal = Calendar.getInstance();
            cal.setTime(d);
            //DSTOffset
            hour += defaultTZ.inDaylightTime(d) ? 1 : 0;

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        dateFormats[0] = DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.FULL, Locale.US);
        dateFormats[1] = DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.FULL, Locale.FRANCE);
        // Make the pattern "G y M d..."
        buf.append(PATTERN_CHARS);
        for (j=buf.length()-1; j>=0; --j) buf.insert(j, ' ');
        dateFormats[2] = new SimpleDateFormat(buf.toString(), Locale.US);
        // Make the pattern "GGGG yyyy MMMM dddd..."
        for (j=buf.length()-1; j>=0; j-=2) {
            for (i=0; i<3; ++i) {
                buf.insert(j, buf.charAt(j));
            }
        }
        dateFormats[3] = new SimpleDateFormat(buf.toString(), Locale.US);


        Date aug13 = new Date((long) 871508052513.0);


        // Expected output field values for above DateFormats on aug13
        // Fields are given in order of DateFormat field number

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        expect(ZDATA, en);


        logln("cross format/parse tests");
        final String basepat = "yy/MM/dd H:mm ";
        final SimpleDateFormat[] formats = { 
            new SimpleDateFormat(basepat + "v", en),
            new SimpleDateFormat(basepat + "vvvv", en),
            new SimpleDateFormat(basepat + "zzz", en),
            new SimpleDateFormat(basepat + "zzzz", en)
        };


        final SimpleDateFormat univ = new SimpleDateFormat("yyyy MM dd HH:mm zzz", en);
        final String[] times = { "2004 01 02 03:04 PST", "2004 07 08 09:10 PDT" };
        for (int i = 0; i < times.length; ++i) {
            try {
                Date d = univ.parse(times[i]);
                logln("time: " + d);
                for (int j = 0; j < formats.length; ++j) {
                    String test = formats[j].format(d);
                    logln("test: '" + test + "'");
                    for (int k = 0; k < formats.length; ++k) {

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        expect(XDATA, en);
    }


    public void TestTimeZoneDisplayName() {
        Calendar cal = new GregorianCalendar();
        SimpleDateFormat testfmt = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");


        for (int i = 0; i < fallbackTests.length; ++i) {
            String[] info = fallbackTests[i];
            logln(info[0] + ";" + info[1] + ";" + info[2] + ";" + info[3]);


            long time = 0;
            try {
                Date testd = testfmt.parse(info[2]);
                time = testd.getTime();
            } catch (ParseException pe) {
                errln("Failed to parse test date data");
                continue;
            }
            ULocale l = new ULocale(info[0]);
            TimeZone tz = TimeZone.getTimeZone(info[1]);
            SimpleDateFormat fmt = new SimpleDateFormat(info[3], l);
            cal.setTimeInMillis(time);
            cal.setTimeZone(tz);
            String result = fmt.format(cal);
            if (!result.equals(info[4])) {
                errln(info[0] + ";" + info[1] + ";" + info[2] + ";" + info[3] + " expected: '" + 
                      info[4] + "' but got: '" + result + "'");
            }
        }

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     * correctly.  In some instances, this means not being parsed at all, and
     * returning an appropriate error.
     */
    public void TestPartialParse994() {
    
        SimpleDateFormat f = new SimpleDateFormat();
        Calendar cal = Calendar.getInstance();
        cal.clear();
        cal.set(1997, 1 - 1, 17, 10, 11, 42);
        Date date = null;
        tryPat994(f, "yy/MM/dd HH:mm:ss", "97/01/17 10:11:42", cal.getTime());

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     */
    public void TestRunTogetherPattern985() {
        String format = "yyyyMMddHHmmssSSS";
        String now, then;
        //UBool flag;
        SimpleDateFormat formatter = new SimpleDateFormat(format);
        Date date1 = new Date();
        now = ((DateFormat) formatter).format(date1);
        logln(now);
        ParsePosition pos = new ParsePosition(0);
        Date date2 = formatter.parse(now, pos);
        if (date2 == null)
            then = "Parse stopped at " + pos.getIndex();
        else
            then = ((DateFormat) formatter).format(date2);
        logln(then);

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    /**
     * Verify the behavior of patterns in which digits for different fields run together
     * without intervening separators.
     */
    public void TestRunTogetherPattern917() {
        SimpleDateFormat fmt;
        String myDate;
        fmt = new SimpleDateFormat("yyyy/MM/dd");
        myDate = "1997/02/03";
        Calendar cal = Calendar.getInstance();
        cal.clear();
        cal.set(1997, 2 - 1, 3);
        _testIt917(fmt, myDate, cal.getTime());
        fmt = new SimpleDateFormat("yyyyMMdd");
        myDate = "19970304";
        cal.clear();
        cal.set(1997, 3 - 1, 4);
        _testIt917(fmt, myDate, cal.getTime());

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Examples of com.ibm.icu.text.SimpleDateFormat

Synchronization

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