java – Setting Turkish and English locale: translate Turkish characters to Latin equivalents-ThrowExceptions

Exception or error:

I want to translate my Turkish strings to lowercase in both English and Turkish locale. I’m doing this:

String myString="YAŞAT BAYRI";
Locale trlocale= new Locale("tr-TR");
Locale enLocale = new Locale("en_US");

Log.v("mainlist", "en source: " +myString.toLowerCase(enLocale));
Log.v("mainlist", "tr source: " +myString.toLowerCase(trlocale));

The output is:

en source: yaşar bayri

tr source: yaşar bayri

But I want to have an output like this:

en source: yasar bayri

tr source: yaşar bayrı

Is this possible in Java?

How to solve:

If you are using the Locale constructor, you can and must set the language, country and variant as separate arguments:

new Locale(language)
new Locale(language, country)
new Locale(language, country, variant)

Therefore, your test program creates locales with the language “tr-TR” and “en_US”. For your test program, you can use new Locale("tr", "TR") and new Locale("en", "US").

If you are using Java 1.7+, then you can also parse a language tag using Locale.forLanguageTag:

String myString="YASAT BAYRI";
Locale trlocale= Locale.forLanguageTag("tr-TR");
Locale enLocale = Locale.forLanguageTag("en_US");

Creates strings that have the appropriate lower case for the language.

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I think this is the problem:

Locale trlocale= new Locale("tr-TR");

Try this instead:

Locale trlocale= new Locale("tr", "TR");

That’s the constructor to use to specify country and language.

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you can do that:

Locale trlocale= new Locale("tr","TR");

The first parameter is your language, while the other one is your country.

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If you just want the string in ASCII, without accents, the following might do.
First an accented character might be split in ASCII char and a combining diacritical mark (zero-width accent). Then only those accents may be removed by regular expression replace.

public static String withoutDiacritics(String s) {
    // Decompose any ş into s and combining-,.
    String s2 = Normalizer.normalize(s, Normalizer.Form.NFD);
    return s2.replaceAll("(?s)\\p{InCombiningDiacriticalMarks}", "");
}

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Characters ş and s are different characters. Changing locale cannot help you to translate one to another. You have to create turkish-to-english characters table and do this yourself. I once did this for Vietnamic language that has a lot of such characters. You have to deal with 4 of 5, right? So, good luck!

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