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


    String pattern = langData.get("localeDisplayPattern", "pattern");
    if ("pattern".equals(pattern)) {
      pattern = "{0} ({1})";
    }
    this.format = new MessageFormat(pattern);


    String keyTypePattern = langData.get("localeDisplayPattern", "keyTypePattern");
    if ("keyTypePattern".equals(keyTypePattern)) {
      keyTypePattern = "{0}={1}";
    }
    this.keyTypeFormat = new MessageFormat(keyTypePattern);


    // Get values from the contextTransforms data
    // (copied from DateFormatSymbols)
    if (capitalization == DisplayContext.CAPITALIZATION_FOR_UI_LIST_OR_MENU
        || capitalization == DisplayContext.CAPITALIZATION_FOR_STANDALONE) {

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        pattern = patterns[glueIndex];
      }
    } catch (MissingResourceException e) {
      // use default
    }
    fCombinedFormat = new MessageFormat(pattern, locale);
    return fCombinedFormat;
  }

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                pattern = patterns[glueIndex];
            }
        } catch (MissingResourceException e) {
            // use default
        }
        fCombinedFormat = new MessageFormat(pattern, locale);
        return fCombinedFormat;
    }

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        if (getSingleCountry(tzid) != null) { // single country
            String regPat = getTZLocalizationInfo(locale, REGION_FORMAT);
            if (regPat == null) {
                regPat = DEF_REGION_FORMAT;
            }
            MessageFormat mf = new MessageFormat(regPat);
            return mf.format(new Object[] { country });
        }


        if (city == null) {
            city = tzid.substring(tzid.lastIndexOf('/')+1).replace('_',' ');
        }


        String flbPat = getTZLocalizationInfo(locale, FALLBACK_FORMAT);
        if (flbPat == null) {
            flbPat = DEF_FALLBACK_FORMAT;
        }
        MessageFormat mf = new MessageFormat(flbPat);


        return mf.format(new Object[] { city, country });
    }

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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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    private static MessageFormat getRegionFormat(ULocale locale) {
        String regionPattern = ZoneMeta.getTZLocalizationInfo(locale, ZoneMeta.REGION_FORMAT);
        if (regionPattern == null) {
            regionPattern = "{0}";
        }
        return new MessageFormat(regionPattern, locale);
    }

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        String pattern = langData.get("localeDisplayPattern", "pattern");
        if ("pattern".equals(pattern)) {
            pattern = "{0} ({1})";
        }
        this.format = new MessageFormat(pattern);
    }

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                pattern = patterns[8];
            }
        } catch (MissingResourceException e) {
            // use default
        }
        fCombinedFormat = new MessageFormat(pattern, locale);
        return fCombinedFormat;
    }

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        if (getSingleCountry(tzid) != null) { // single country
            String regPat = getTZLocalizationInfo(locale, REGION_FORMAT);
            if (regPat == null) {
                regPat = DEF_REGION_FORMAT;
            }
            MessageFormat mf = new MessageFormat(regPat);
            return mf.format(new Object[] { country });
        }


        if (city == null) {
            city = tzid.substring(tzid.lastIndexOf('/')+1).replace('_',' ');
        }


        String flbPat = getTZLocalizationInfo(locale, FALLBACK_FORMAT);
        if (flbPat == null) {
            flbPat = DEF_FALLBACK_FORMAT;
        }
        MessageFormat mf = new MessageFormat(flbPat);


        return mf.format(new Object[] { city, country });
    }

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            // because generic location format is generated from tzid for the case.
            // The rest of code should work even zoneStrings is null.
        }


        String[] zoneIDs = TimeZone.getAvailableIDs();
        MessageFormat fallbackFmt = getFallbackFormat(locale);
        MessageFormat regionFmt = getRegionFormat(locale);


        String[] zstrarray = new String[ZSIDX_MAX];
        String[] mzstrarray = new String[ZSIDX_MAX];
        String[][] mzPartialLoc = new String[10][4]; // maximum 10 metazones per zone


        for (int i = 0; i < zoneIDs.length; i++) {
            // Skip aliases
            String tzid = ZoneMeta.getCanonicalSystemID(zoneIDs[i]);
            if (tzid == null || !zoneIDs[i].equals(tzid)) {
                continue;
            }


            String zoneKey = tzid.replace('/', ':');
            zstrarray[ZSIDX_LONG_STANDARD] = getZoneStringFromBundle(zoneStringsBundle, zoneKey, RESKEY_LONG_STANDARD);
            zstrarray[ZSIDX_SHORT_STANDARD] = getZoneStringFromBundle(zoneStringsBundle, zoneKey, RESKEY_SHORT_STANDARD);
            zstrarray[ZSIDX_LONG_DAYLIGHT] = getZoneStringFromBundle(zoneStringsBundle, zoneKey, RESKEY_LONG_DAYLIGHT);
            zstrarray[ZSIDX_SHORT_DAYLIGHT] = getZoneStringFromBundle(zoneStringsBundle, zoneKey, RESKEY_SHORT_DAYLIGHT);
            zstrarray[ZSIDX_LONG_GENERIC] = getZoneStringFromBundle(zoneStringsBundle, zoneKey, RESKEY_LONG_GENERIC);
            zstrarray[ZSIDX_SHORT_GENERIC] = getZoneStringFromBundle(zoneStringsBundle, zoneKey, RESKEY_SHORT_GENERIC);


            // Compose location format string
            String countryCode = ZoneMeta.getCanonicalCountry(tzid);
            String country = null;
            String city = null;
            if (countryCode != null) {
                city = getZoneStringFromBundle(zoneStringsBundle, zoneKey, RESKEY_EXEMPLAR_CITY);
                if (city == null) {
                    city = tzid.substring(tzid.lastIndexOf('/') + 1).replace('_', ' ');
                }
                country = getLocalizedCountry(countryCode, locale);
                if (ZoneMeta.getSingleCountry(tzid) != null) {
                    // If the zone is only one zone in the country, do not add city
                    zstrarray[ZSIDX_LOCATION] = regionFmt.format(new Object[] {country});
                } else {
                    zstrarray[ZSIDX_LOCATION] = fallbackFmt.format(new Object[] {city, country});
                }
            } else {
                zstrarray[ZSIDX_LOCATION] = null;

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Examples of com.ibm.icu.text.MessageFormat

Synchronization

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