428     }
 429 
 430     public Set<String> getLanguageTagSet(String category) {
 431         Set<String> tagset = langtagSets.get(category);
 432         if (tagset == null) {
 433             tagset = createLanguageTagSet(category);
 434             Set<String> ts = langtagSets.putIfAbsent(category, tagset);
 435             if (ts != null) {
 436                 tagset = ts;
 437             }
 438         }
 439         return tagset;
 440     }
 441 
 442     protected Set<String> createLanguageTagSet(String category) {
 443         String supportedLocaleString = createSupportedLocaleString(category);
 444         if (supportedLocaleString == null) {
 445             return Collections.emptySet();
 446         }
 447         StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
 448         Set<String> tagset = new HashSet<>(Math.max((int)(tokens.countTokens() / 0.75f) + 1, 16));
 449         while (tokens.hasMoreTokens()) {
 450             tagset.add(tokens.nextToken());
 451         }
 452 
 453         return tagset;
 454     }
 455 
 456     private static String createSupportedLocaleString(String category) {
 457         // Directly call Base tags, as we know it's in the base module.
 458         String supportedLocaleString = BaseLocaleDataMetaInfo.getSupportedLocaleString(category);
 459 
 460         // Use ServiceLoader to dynamically acquire installed locales' tags.
 461         try {
 462             String nonBaseTags = AccessController.doPrivileged((PrivilegedExceptionAction<String>) () -> {
 463                 StringBuilder tags = new StringBuilder();
 464                 for (LocaleDataMetaInfo ldmi :
 465                         ServiceLoader.loadInstalled(LocaleDataMetaInfo.class)) {
 466                     if (ldmi.getType() == LocaleProviderAdapter.Type.JRE) {
 467                         String t = ldmi.availableLanguageTags(category);
 468                         if (t != null) {

 428     }
 429 
 430     public Set<String> getLanguageTagSet(String category) {
 431         Set<String> tagset = langtagSets.get(category);
 432         if (tagset == null) {
 433             tagset = createLanguageTagSet(category);
 434             Set<String> ts = langtagSets.putIfAbsent(category, tagset);
 435             if (ts != null) {
 436                 tagset = ts;
 437             }
 438         }
 439         return tagset;
 440     }
 441 
 442     protected Set<String> createLanguageTagSet(String category) {
 443         String supportedLocaleString = createSupportedLocaleString(category);
 444         if (supportedLocaleString == null) {
 445             return Collections.emptySet();
 446         }
 447         StringTokenizer tokens = new StringTokenizer(supportedLocaleString);
 448         Set<String> tagset = new HashSet<>((tokens.countTokens() * 4 + 2) / 3);
 449         while (tokens.hasMoreTokens()) {
 450             tagset.add(tokens.nextToken());
 451         }
 452 
 453         return tagset;
 454     }
 455 
 456     private static String createSupportedLocaleString(String category) {
 457         // Directly call Base tags, as we know it's in the base module.
 458         String supportedLocaleString = BaseLocaleDataMetaInfo.getSupportedLocaleString(category);
 459 
 460         // Use ServiceLoader to dynamically acquire installed locales' tags.
 461         try {
 462             String nonBaseTags = AccessController.doPrivileged((PrivilegedExceptionAction<String>) () -> {
 463                 StringBuilder tags = new StringBuilder();
 464                 for (LocaleDataMetaInfo ldmi :
 465                         ServiceLoader.loadInstalled(LocaleDataMetaInfo.class)) {
 466                     if (ldmi.getType() == LocaleProviderAdapter.Type.JRE) {
 467                         String t = ldmi.availableLanguageTags(category);
 468                         if (t != null) {