Examples of com.ibm.icu.text.MessageFormat

com.ibm.icu.text.MessageFormat
ut, with different testArgs output: The disk "MyDisk" contains 0 file(s). output: The disk "MyDisk" contains 1 file(s). output: The disk "MyDisk" contains 1,273 file(s).
For more sophisticated patterns, you can use a ChoiceFormat to get output such as:
```
 MessageFormat form = new MessageFormat("The disk \"{1}\" contains {0}."); double[] filelimits = {0,1,2}; String[] filepart = {"no files","one file","{0,number} files"}; ChoiceFormat fileform = new ChoiceFormat(filelimits, filepart); form.setFormatByArgumentIndex(0, fileform); Object[] testArgs = {new Long(12373), "MyDisk"}; System.out.println(form.format(testArgs)); // output, with different testArgs output: The disk "MyDisk" contains no files. output: The disk "MyDisk" contains one file. output: The disk "MyDisk" contains 1,273 files. 
```
You can either do this programmatically, as in the above example, or by using a pattern (see {@link ChoiceFormat}for more information) as in:
```
 form.applyPattern( "There {0,choice,0#are no files|1#is one file|1<are {0,number,integer} files}."); 
```
Note: As we see above, the string produced by a ChoiceFormat in MessageFormat is treated specially; occurances of '{' are used to indicated subformats, and cause recursion. If you create both a MessageFormat and ChoiceFormat programmatically (instead of using the string patterns), then be careful not to produce a format that recurses on itself, which will cause an infinite loop.
When a single argument is parsed more than once in the string, the last match will be the final result of the parsing. For example,
```
 MessageFormat mf = new MessageFormat("{0,number,#.##}, {0,number,#.#}"); Object[] objs = {new Double(3.1415)}; String result = mf.format( objs ); // result now equals "3.14, 3.1" objs = null; objs = mf.parse(result, new ParsePosition(0)); // objs now equals {new Double(3.1)} 
```
Likewise, parsing with a MessageFormat object using patterns containing multiple occurances of the same argument would return the last match. For example,
```
 MessageFormat mf = new MessageFormat("{0}, {0}, {0}"); String forParsing = "x, y, z"; Object[] objs = mf.parse(forParsing, new ParsePosition(0)); // result now equals {new String("z")} 
```
Synchronization

Message 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 java.util.Locale @see Format @see NumberFormat @see DecimalFormat @see ChoiceFormat @author Mark Davis @stable ICU 3.0

    
    public void testNamedArguments() {
        // Ensure that mixed argument types are not allowed.
        // Either all arguments have to be numeric or valid identifiers.
        try {
            new MessageFormat("Number of files in folder {0}: {numfiles}");
            errln("Creating a MessageFormat with mixed argument types " + 
                    "(named and numeric) should throw an " + 
                    "IllegalArgumentException but did not!");
        } catch (IllegalArgumentException e) {}
        
        try {
            new MessageFormat("Number of files in folder {folder}: {1}");
            errln("Creating a MessageFormat with mixed argument types " + 
                    "(named and numeric) should throw an " + 
                    "IllegalArgumentException but did not!");
        } catch (IllegalArgumentException e) {}
        
        // Test named arguments.
        MessageFormat mf = new MessageFormat("Number of files in folder {folder}: {numfiles}");
        if (!mf.usesNamedArguments()) {
            errln("message format 1 should have used named arguments");
        }
        mf = new MessageFormat("Wavelength:  {\u028EValue\uFF14}");
        if (!mf.usesNamedArguments()) {
            errln("message format 2 should have used named arguments");
        }
        
        // Test argument names with invalid start characters.
        try {
            new MessageFormat("Wavelength:  {_\u028EValue\uFF14}");
            errln("Creating a MessageFormat with invalid argument names " + 
            "should throw an IllegalArgumentException but did not!");
        } catch (IllegalArgumentException e) {}
        
        try {
            new MessageFormat("Wavelength:  {\uFF14\u028EValue}");
            errln("Creating a MessageFormat with invalid argument names " + 
            "should throw an IllegalArgumentException but did not!");
        } catch (IllegalArgumentException e) {}
        
        // Test argument names with invalid continue characters.
        try {
            new MessageFormat("Wavelength:  {Value@\uFF14}");
            errln("Creating a MessageFormat with invalid argument names " + 
            "should throw an IllegalArgumentException but did not!");
        } catch (IllegalArgumentException e) {}
        
        try {
            new MessageFormat("Wavelength:  {Value(\uFF14)}");
            errln("Creating a MessageFormat with invalid argument names " + 
            "should throw an IllegalArgumentException but did not!");
        } catch (IllegalArgumentException e) {}        
    }

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            "should throw an IllegalArgumentException but did not!");
        } catch (IllegalArgumentException e) {}        
    }


    public void testNumericFormatWithMap() {
        MessageFormat mf = new MessageFormat("X:{2} Y:{1}");
        if (mf.usesNamedArguments()) {
            errln("should not use named arguments");
        }


        Map map12 = new HashMap();
        map12.put("1", "one");
        map12.put("2", "two");


        String target = "X:two Y:one";
        String result = mf.format(map12);
        if (!target.equals(result)) {
            errln("expected '" + target + "' but got '" + result + "'");
        }


        try {
            Map mapResult = mf.parseToMap(target);
            if (!map12.equals(mapResult)) {
                errln("expected " + map12 + " but got " + mapResult);
            }
        } catch (ParseException e) {
            errln("unexpected exception: " + e.getMessage());
        }


        Map map10 = new HashMap();
        map10.put("1", "one");
        map10.put("0", "zero");
        target = "X:{2} Y:one";
        result = mf.format(map10);
        if (!target.equals(result)) {
            errln("expected '" + target + "' but got '" + result + "'");
        }


        DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.MEDIUM);
        DateFormat timeFormat = DateFormat.getTimeInstance(DateFormat.MEDIUM);
        Map fmtMap = new HashMap();
        fmtMap.put("1", dateFormat);
        fmtMap.put("2", timeFormat);
        mf.setFormatsByArgumentName(fmtMap);
        Date date = new Date(661439820000L);


        try {
            result = mf.format(map12); // should fail, wrong argument type
            fail("expected exception but got '" + result + "'");
        } catch (IllegalArgumentException e) {
            // expect this
        }


        Map argMap = new HashMap();
        argMap.put("1", date);
        argMap.put("2", date);
        target = "X:5:17:00 AM Y:Dec 17, 1990";
        result = mf.format(argMap);
        if (!target.equals(result)) {
            errln("expected '" + target + "' but got '" + result + "'");
        }
    }

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     */
    public static void main(String[] args)
    {
        TimeZone utc = new SimpleTimeZone(0, "UTC");
        Calendar cal = Calendar.getInstance(utc, Locale.ENGLISH);
        MessageFormat fmt = new MessageFormat("{1} = {0, date, full} {0, time, full}");
        Object arguments[] = {cal, null};
        
        arguments[0] = cal;
        
        System.out.println("\nJava test:");
        cal.setTimeInMillis(UniversalTimeScale.toLong(UniversalTimeScale.from(0, UniversalTimeScale.JAVA_TIME), UniversalTimeScale.ICU4C_TIME));
        arguments[1] = " 000000000000000";
        System.out.println(fmt.format(arguments));
        
        cal.setTimeInMillis(UniversalTimeScale.toLong(UniversalTimeScale.from(-62164684800000L, UniversalTimeScale.JAVA_TIME), UniversalTimeScale.ICU4C_TIME));
        arguments[1] = "-62164684800000L";
        System.out.println(fmt.format(arguments));
        
        cal.setTimeInMillis(UniversalTimeScale.toLong(UniversalTimeScale.from(-62135769600000L, UniversalTimeScale.JAVA_TIME), UniversalTimeScale.ICU4C_TIME));
        arguments[1] = "-62135769600000L";
        System.out.println(fmt.format(arguments));
        
        System.out.println("\nUnix test:");
        
        cal.setTimeInMillis(UniversalTimeScale.toLong(UniversalTimeScale.from(0x80000000, UniversalTimeScale.UNIX_TIME), UniversalTimeScale.ICU4C_TIME));
        arguments[1] = "0x80000000";
        System.out.println(fmt.format(arguments));
        
        cal.setTimeInMillis(UniversalTimeScale.toLong(UniversalTimeScale.from(0, UniversalTimeScale.UNIX_TIME), UniversalTimeScale.ICU4C_TIME));
        arguments[1] = "0x00000000";
        System.out.println(fmt.format(arguments));
        
        cal.setTimeInMillis(UniversalTimeScale.toLong(UniversalTimeScale.from(0x7FFFFFFF, UniversalTimeScale.UNIX_TIME), UniversalTimeScale.ICU4C_TIME));
        arguments[1] = "0x7FFFFFFF";
        System.out.println(fmt.format(arguments));
        
    }

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    }


    // This tests nested Formats inside PluralFormat.
    public void testNestedFormatsInPluralFormat() {
        try {
            MessageFormat msgFmt = new MessageFormat(
                    "{0, plural, one {{0, number,C''''est #,##0.0# fichier}} " +
                    "other {Ce sont # fichiers}} dans la liste.",
                    new ULocale("fr"));
            Object objArray[] = {new Long(0)};
            HashMap objMap = new HashMap();
            objMap.put("argument", objArray[0]);
            String result = msgFmt.format(objArray);
            if (!result.equals("C'est 0,0 fichier dans la liste.")) {
                errln("PluralFormat produced wrong message string.");
            }
        } catch (Exception e) {
            e.printStackTrace();

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    }


    // This tests PluralFormats used inside MessageFormats.
    public void testPluralFormat() {
        {
            MessageFormat mfNum = new MessageFormat(
                    "{0, plural, one{C''est # fichier} other " + 
                      "{Ce sont # fichiers}} dans la liste.",
                    new ULocale("fr"));
            MessageFormat mfAlpha = new MessageFormat(
                    "{argument, plural, one{C''est # fichier} other {Ce " +
                      "sont # fichiers}} dans la liste.",
                    new ULocale("fr"));
            Object objArray[] = {new Long(0)};
            HashMap objMap = new HashMap();
            objMap.put("argument", objArray[0]);
            String result = mfNum.format(objArray);
            if (!result.equals(mfAlpha.format(objMap))) {
                errln("PluralFormat's output differs when using named " + 
                        "arguments instead of numbers!");
            }
            if (!result.equals("C'est 0 fichier dans la liste.")) {
                errln("PluralFormat produced wrong message string.");
            }
        }
        {
            MessageFormat mfNum = new MessageFormat (
                    "There {0, plural, one{is # zavod}few{are {0, " +
                      "number,###.0} zavoda} other{are # zavodov}} in the " +
                      "directory.",
                    new ULocale("ru"));
            MessageFormat mfAlpha = new MessageFormat (
                    "There {argument, plural, one{is # zavod}few{" +
                      "are {argument, number,###.0} zavoda} other{are # " + 
                      "zavodov}} in the directory.",
                    new ULocale("ru"));
            Object objArray[] = {new Long(4)};
            HashMap objMap = new HashMap();
            objMap.put("argument", objArray[0]);
            String result = mfNum.format(objArray);
            if (!result.equals(mfAlpha.format(objMap))) {
                errln("PluralFormat's output differs when using named " + 
                        "arguments instead of numbers!");
            }
            if (!result.equals("There are 4,0 zavoda in the directory.")) {
                errln("PluralFormat produced wrong message string.");

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      "{0, plural, one {C''est # fichier} other {Ce sont # fichiers}} dans la liste.",
    };


    for (int i = 0; i < patterns.length; ++i) {
      String pattern = patterns[i];
      MessageFormat mf = new MessageFormat(pattern);
      MessageFormat mf2 = new MessageFormat(mf.toPattern());
      if (!mf.equals(mf2)) {
        errln("message formats not equal for pattern:\n*** '" + pattern + "'\n*** '" +
              mf.toPattern() + "'");
      }
    }

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  }


    // Test case for null arguments.
    // Ticket#6361
    public void TestNullArgs() {
        MessageFormat msgfmt = new MessageFormat("{0} - {1}");
        Object[][] TEST_CASES = {
            {null,                          "{0} - {1}"},
            {new Object[] {null},           "null - {1}"},
            {new Object[] {null, null},     "null - null"},
            {new Object[] {"one"},          "one - {1}"},
            {new Object[] {"one", null},    "one - null"},
            {new Object[] {null, "two"},    "null - two"},
        };


        for (int i = 0; i < TEST_CASES.length; i++) {
            String text = msgfmt.format(TEST_CASES[i][0]);
            if (!text.equals(TEST_CASES[i][1])) {
                errln("FAIL: Returned[" + text + "] Expected[" + TEST_CASES[i][1] + "]");
            }
        }
    }

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            }
        }
    }
    
    public void TestSetFormat() {
        MessageFormat ms = new MessageFormat("{number} {date}", ULocale.ENGLISH);
        final DecimalFormat decimalFormat = new DecimalFormat("000.000", DecimalFormatSymbols.getInstance(ULocale.ENGLISH));
        ms.setFormatByArgumentName("number", decimalFormat);
        final SimpleDateFormat dateFormat = new SimpleDateFormat("'year:'yy 'month:'MM 'day:'dd");
        dateFormat.setTimeZone(TimeZone.getTimeZone("Etc/GMT"));
        ms.setFormatByArgumentName("date", dateFormat);
        Map map = new HashMap();
        map.put("number", new Integer(1234));
        map.put("date", new Date(0,0,0));
        String result = ms.format(map);
        assertEquals("setFormatByArgumentName", "1234.000 year:99 month:12 day:31", result);
        Set formatNames = ms.getFormatArgumentNames();
        assertEquals("Format Names match", formatNames, map.keySet());
        assertEquals("Decimal", decimalFormat, ms.getFormatByArgumentName("number"));
        assertEquals("Date", dateFormat, ms.getFormatByArgumentName("date"));
    }

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//#if defined(FOUNDATION10) || defined(J2SE13)
//#else
    // Test case for formatToCharacterIterator
    public void TestFormatToCharacterIterator() {
        MessageFormat[] msgfmts = {
            new MessageFormat("The {3,ordinal} folder ''{0}'' contains {2,number} file(s), created at {1,time} on {1,date}."),
            new MessageFormat("The {arg3,ordinal} folder ''{arg0}'' contains {arg2,number} file(s), created at {arg1,time} on {arg1,date}."), // same as above, but named args
            new MessageFormat("The folder contains {0}.")
        };


        double filelimits[] = {0,1,2};
        String filepart[] = {"no files","one file","{0,number} files"};
        ChoiceFormat fileform = new ChoiceFormat(filelimits, filepart);

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    private static MessageFormat getFallbackFormat(ULocale locale) {
        String fallbackPattern = ZoneMeta.getTZLocalizationInfo(locale, ZoneMeta.FALLBACK_FORMAT);
        if (fallbackPattern == null) {
            fallbackPattern = "{1} ({0})";
        }
        return new MessageFormat(fallbackPattern, locale);
    }

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Examples of com.ibm.icu.text.MessageFormat

Synchronization

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