I'm trying to display some message on the screen in a different language (but keeping the dates in the default language, uk_eng), depending on what user is looking at the screen. Being only a temporary setting I was wondering what's the best way to do it in Java.
You could have message bundles for each Locale. Load these and display them appropriately when you identify the user's Locale.
An example is at http://java.sun.com/developer/onlineTraining/Programming/BasicJava2/int.html
You could load these in a web app too like http://www.devsphere.com/mapping/docs/guide/internat.html
If I see the problem well, you want to display messages with MessageFormat like this:
Object[] arguments = {
new Integer(7),
new Date(System.currentTimeMillis()),
"a disturbance in the Force"
};
String result = MessageFormat.format(
"At {1,time} on {1,date}, there was {2} on planet {0,number,integer}.",
arguments);
(Example from javadoc)
I checked the source of the MessageFormat and I see that getLocale() is common for the whole message. You cannot make a distinct one for a parameter.
Why don't you make a parameter with the formatted date string itself? Like this:
Object[] arguments = {
new SimpleDateFormat("yyyyy.MMMMM.dd GGG hh:mm aaa", Locale.UK).format(new Date())
};
String result = MessageFormat.format(
"This is the date format which I always want independently of the locale: {1} ",
arguments);
The first parameter of the format methods may come from localized property files.
Related
I have localized messages, for example:
error.message = Invalid {0}
object.foo = Foo
and some validation code within my ValidatorForm:
errors.add(ActionErrors.GLOBAL_MESSAGE, new ActionMessage("errors.message", "Foo"));
This works just fine. But I want to localize the message arguments as well using key object.foo.
I've tried:
getServlet().getInternal().getMessage("object.foo");
but this results in null. Is there some other way?
It's not so difficult, I'll try find harder next time...
org.apache.struts.validator.Resources.getMessage(request,key);
I have a form that user enter a country name, then I have to convert it to iso2 or iso3 code.
How is it possible? I prefer not to use map, as it seems not running on my Android app.
This code is for converthing iso2 to an actual name, I want the other way around:
Locale l = new Locale("", "CH");
System.out.println(l.getDisplayCountry());
Have you tried Locale.getISO3Country() ?
To actually do the conversion, you might need to loop through all the available locales and look for the one whose getDisplayCountry() matches your input country name.
It doesn't sound efficient (but you said to not use maps), but you might try something like:
Locale convertCountryNameToIsoCode(String countryName)
for(Locale l : Locale.getAvailableLocales()) {
if (l.getDisplayCountry().equals(countryName)) {
return l;
}
}
return null;
}
http://docs.oracle.com/javase/7/docs/api/java/util/Locale.html#getISO3Country()
However, if the input comes from a web form, than it would be easier to set the country code directly as the web form input value. If the input comes from an Android native App, then I'm not sure but I'd bet you might a similar thing
My app is being fed string from an external process, where each string is either 2- or 5-characters in length, and represents a java.util.Locales. For example:
en-us
ko
The first example is a 5-char string where "en" is the ISO language code, and "us" is the ISO country code. This should correspond to the "en_US" Locale. The second example is only a 2-char string, where "ko" is the ISO language code, and should correspond to the "ko_KR" (Korean) Locale.
I need a way to take these strings (either the 2- or 5-char variety), validate it (as a supported Java 6 Locale), and then create a Locale instance with it.
I would have hoped that Locale came with such validation out of the box, but unfortunately this code runs without exceptions being thrown:
Locale loc = new Locale("waawaaweewah", "greatsuccess");
// Prints: "waawaaweewah"
System.out.println(loc.getDisplayLanguage());
So I ask, given me the 2 forms that these string will be given to me in, how can I:
Validate the string (both forms) and throw an exception for strings corresponding to non-existent or unsupported Java 6 Locales; and
Instantiate a new Locale from the string? This question really applies to the 2-char form, where I might only have "ko" and need it to map to the "ko_KR" Locale, etc.
Thanks in advance!
Locale.getISOCountries() and Locale.getISOLanguages()
return a list of all 2-letter country and language codes defined in ISO 3166 and ISO 639 respectively and can be used to create Locales.
You can use this to validate your inputs.
You have two options,
Use a library for doing this commons-lang has the LocaleUtils class that has a method that can parse a String to a Locale.
While your own method, the validation here is non trivial as there are a number of different sets of country codes that a valid for a Locale - see the javadoc
A starting point would be to split the String and switch on the number of elements:
public static Locale parseLocale(final String locale) {
final String[] localeArr = locale.split("_");
switch (localeArr.length) {
case 1:
return new Locale(localeArr[0]);
case 2:
return new Locale(localeArr[0], localeArr[1]);
case 3:
return new Locale(localeArr[0], localeArr[1], localeArr[2]);
default:
throw new IllegalArgumentException("Invalid locale format;");
}
}
Presumably you would need to get lists of all valid country codes and languages and compare the elements in the String[] to the valid values before calling the constructor.
LocaleContext.getLocale() returns the locale object currently as 'en_US_WOL'. I verified the locale object using breakpoint and looks like en- language English, US - country code of US, WOL - variation (a field of Locale object).
How and why is the variation field getting appending and returned for getLocale() method? and how can I stop that? (LocaleContext is of type ThreadLocal)
According to http://docs.oracle.com/javase/6/docs/api/java/util/Locale.html
The variant argument is a vendor or browser-specific code. For example, use WIN for Windows, MAC for Macintosh, and POSIX for POSIX. Where there are two variants, separate them with an underscore, and put the most important one first. For example, a Traditional Spanish collation might construct a locale with parameters for language, country and variant as: "es", "ES", "Traditional_WIN".
If you're after Locale for specific variant, I presume you can use this constructor:
Locale(String language, String country, String variant)
Or adjust your browser's locale settings (if your application involves browser at all)
I had a problem with this too. Unfortunately I haven't found any build-in method to nicely output lang-country code without Variant so I helped myself with such snippet (maybe would be handy to somebody) :
public static String getLanguageCode(Locale locale) {
StringBuilder sb = new StringBuilder();
sb.append(locale.getLanguage());
if (locale.getCountry() != null && locale.getCountry().length() > 0) {
sb.append("-");
sb.append(locale.getCountry());
}
return sb.toString();
}
I'm trying to format a date for a given locale new Locale("mk", "MK"). The locale is valid, it returns the country name and language properly. I want to use custom string, in my case "E, kk:mm" or "EEEE, kk:mm". I want the output to be "сабота, 12:00", but what I get is "7, 12:00".
This is how I use it and I tried many ways, but they all seem to behave the same.
SimpleDateFormat sdf = new SimpleDateFormat("EEEE, kk:mm", new Locale("mk", "MK));
sdf.format(new Date());
// output: 7, 12:30
Another method I tried
Calendar calendar = Calendar.getInstance(new Locale("mk", "MK"));
calendar.setTimeInMillis(new Date().getTime());
DateFormat.format("EEEE, kk:mm", calendar);
// output: Saturday, 12:30
I also tried using java.text.DateFormat instead android class, but no change.
The phone locale is set to English, but this is localized app, I want to show dates in a fixed locale format.
I've looked into many SO question regarding this issue and I wasn't able to find answer. I'm not interested in predefined formats, I want to use my own format and I want the date/month names to be formatted for the input locale.
I think the problem is that Macedonia is not a supported locale on the Android JVM. If you run your code as plain Java console app, it's fine. The method Locale.getAvailableLocales() returns 152 members in plain Java, only 88 in an Android emulator. If you have the code snippet:
Locale[] locales = Locale.getAvailableLocales();
String cCode;
for (Locale loc :locales){
cCode = loc.getCountry();
if (cCode.equalsIgnoreCase("MK"))
Toast.makeText(this, cCode, Toast.LENGTH_SHORT).show();
// Or System.out.println() in a Java app
}
Then the toast doesn't show for "MK" although it will println in the Java app
From documentation of SimpleDateFormat:
**Text**: For formatting, if the number of pattern letters is 4 or more,
the full form is used; otherwise a short or abbreviated form is used if
available. For parsing, both forms are accepted, independent of the
number of pattern letters.
So this should fix it:
SimpleDateFormat sdf = new SimpleDateFormat("EEEE, kk:mm", new Locale("mk", "MK"));
NickT was faster :-), so just adding to his answer: if you want to see your locales supported on Android, run:
for (Locale l:Locale.getAvailableLocales()) {
Log.d(l.getDisplayCountry(),l.toString());
}
and you will see that Macedonia is not on the list.