Bug8209047.java

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 /*
 * @test
 * @bug 8209047
 * @modules jdk.localedata
 * @summary Check that DateFormat's getDateInstance, getTimeInstance and getDateTimeInstance works with all locales.
 */
import java.text.DateFormat;
import java.util.Arrays;
import java.util.Locale;
import java.util.Set;

public class Bug8209047 {

    public static void main(String[] args) {
        Set<Integer> styles = Set.of(DateFormat.FULL, DateFormat.LONG, DateFormat.MEDIUM, DateFormat.SHORT);
        Arrays.stream(Locale.getAvailableLocales()).forEach(locale -> {
            styles.forEach(style -> {
                try {
                    DateFormat.getDateInstance(style, locale);
                    DateFormat.getTimeInstance(style, locale);
                    DateFormat.getDateTimeInstance(style, style, locale);
                } catch (IllegalArgumentException ex) {
                    throw new RuntimeException("Getting DateFormat instance failed for locale " + locale, ex);
                }
            });
        });
    }
}