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POIn Java, why does the decimal separator follow the Locale's language, not its country, and, more importantly, how does one override it?
 

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  1. POIn Java, why does the decimal separator follow the Locale's language, not its country, and, more importantly, how does one override it?
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    <p>I'm working on an international project and have observed that, in Java, the choice of the decimal separator is based on the Locale's language, not its country. For example:</p> <pre><code>DecimalFormat currencyFormatter = (DecimalFormat) NumberFormat.getInstance(new Locale("it","IT")); System.out.println(currencyFormatter.format(-123456.78)); currencyFormatter = (DecimalFormat) NumberFormat.getInstance(new Locale("en","IT")); System.out.println(currencyFormatter.format(-123456.78)); </code></pre> <p>produces the following output:</p> <pre><code>-123.456,78 -123,456.78 </code></pre> <p>I would have expected it to follow the country, since if I'm in the country, whether I speak English or Italian the numbers in that country are written with the decimal separator as comma.</p> <p>My question is two-fold:</p> <ol> <li>Does anyone know why this behaviour follows the language?</li> <li>More importantly, can anyone offer details as to how to modify the default behaviour in Java to follow the language instead?</li> </ol> <p>Thanks.</p>
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    1. USJoachim Sauer
    1. USMark Hanes
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      1. POIn Java, why does the decimal separator follow the Locale's language, not its country, and, more importantly, how does one override it?
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    1. CO2) you mean "to follow the country instead" don't you?
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      1. POIn Java, why does the decimal separator follow the Locale's language, not its country, and, more importantly, how does one override it?
      1. USPéter Török
    2. COIt seems reasonable to me that the decimal separator convention follows the language of a document, not the country which the document is currently in. But it would be interesting to hear people's opinions on this. At least I know that my English professors would have disliked me using Swedish conventions for writing dates, numbers, etc. in English coursework.
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      1. POIn Java, why does the decimal separator follow the Locale's language, not its country, and, more importantly, how does one override it?
      1. USHans W
    3. COA Locale defines a set of cultural conventions for common aspects present in every language and its variations. A country defines variations on a language (i.e. English used in Britain and US) but country does not mark in any case a common convention to be applicable to its languages (in Canada, there's English en_CA and French fr_CA). And by the way, there's no culture that uses English as a language in Italy, consider using plainly Locale("en"), that's why that Locale en_IT falls to plain "en". http://en.wikipedia.org/wiki/Date_and_time_notation_in_Canada <- interesting about this topic
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      1. USYago Méndez Vidal
 

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