test/java/util/Locale/LocaleProviders.java

*** 25,34 ****
--- 25,39 ----
  import sun.util.locale.provider.LocaleProviderAdapter;
  
  public class LocaleProviders {
  
      public static void main(String[] args) {
+         if (args.length == 0) {
+             // no args indicates that the caller is asking the platform default locale.
+             Locale defloc = Locale.getDefault();
+             System.out.printf("%s,%s\n", defloc.getLanguage(), defloc.getCountry());
+         } else {
              String expected = args[0];
              Locale testLocale = new Locale(args[1], args[2]);
              String preference = System.getProperty("java.locale.providers", "");
              LocaleProviderAdapter lda = LocaleProviderAdapter.getAdapter(DateFormatProvider.class, testLocale);
              LocaleProviderAdapter.Type type = lda.getAdapterType();
*** 35,40 ****
--- 40,46 ----
              System.out.printf("testLocale: %s, got: %s, expected: %s\n", testLocale, type, expected);
              if (!type.toString().equals(expected)) {
                  throw new RuntimeException("Returned locale data adapter is not correct.");
              }
          }
+     }
  }