test/jdk/java/util/Locale/LocaleShouldSetFromCLI.java

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/*
 * @test
 * @bug 4152725
 * @summary Verify that the default locale can be specified from the
 * command line.
 * @run main/othervm -Duser.language=de -Duser.country=DE -Duser.variant=EURO
 *      LocaleShouldSetFromCLI de_DE_EURO
 * @run main/othervm -Duser.language=ja -Duser.country= -Duser.variant=
 *      LocaleShouldSetFromCLI ja
 * @run main/othervm -Duser.language=en -Duser.country=SG -Duser.variant=
 *      LocaleShouldSetFromCLI en_SG
 * @run main/othervm -Duser.language= -Duser.country=DE -Duser.variant=EURO
 *      LocaleShouldSetFromCLI _DE_EURO
 * @run main/othervm -Duser.language=ja -Duser.country= -Duser.variant=YOMI
 *      LocaleShouldSetFromCLI ja__YOMI
 * @run main/othervm -Duser.language= -Duser.country= -Duser.variant=EURO
 *      LocaleShouldSetFromCLI __EURO
 * @run main/othervm -Duser.language=de -Duser.region=DE_EURO
 *      LocaleShouldSetFromCLI de_DE_EURO
 */

import java.util.Locale;

public class LocaleShouldSetFromCLI {

    public static void main(String[] args) {

        if (args.length != 1) {
            throw new RuntimeException("expected locale needs to be specified");
        }

        Locale locale = Locale.getDefault();

        // don't use Locale.toString - it's bogus
        String language = locale.getLanguage();
        String country = locale.getCountry();
        String variant = locale.getVariant();
        String localeID = null;
        if (variant.length() > 0) {
            localeID = language + "_" + country + "_" + variant;
        } else if (country.length() > 0) {
            localeID = language + "_" + country;
        } else {
            localeID = language;
        }

        if (localeID.equals(args[0])) {
            System.out.println("Correctly set from command line: " + localeID);
        } else {
            throw new RuntimeException("expected default locale: " + args[0]
                    + ", actual default locale: " + localeID);
        }
    }
}