src/java.base/share/classes/sun/util/locale/provider/LocaleResources.java

*** 40,53 ****
--- 40,55 ----
  
  package sun.util.locale.provider;
  
  import java.lang.ref.ReferenceQueue;
  import java.lang.ref.SoftReference;
+ import java.text.CompactNumberFormat;
  import java.text.MessageFormat;
  import java.util.Calendar;
  import java.util.HashSet;
  import java.util.LinkedHashSet;
+ import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Objects;
  import java.util.ResourceBundle;
  import java.util.Set;
*** 86,95 ****
--- 88,98 ----
      private static final String LOCALE_NAMES = "LN.";
      private static final String TIME_ZONE_NAMES = "TZN.";
      private static final String ZONE_IDS_CACHEKEY = "ZID";
      private static final String CALENDAR_NAMES = "CALN.";
      private static final String NUMBER_PATTERNS_CACHEKEY = "NP";
+     private static final String COMPACT_NUMBER_PATTERNS_CACHEKEY = "CNP";
      private static final String DATE_TIME_PATTERN = "DTP.";
  
      // TimeZoneNamesBundle exemplar city prefix
      private static final String TZNB_EXCITY_PREFIX = "timezone.excity.";
  
*** 477,486 ****
--- 480,515 ----
  
          return numberPatterns;
      }
      
      /**
+      * Returns the compact number format patterns.
+      * @param formatStyle the style for formatting a number
+      * @return a list of compact number patterns
+      */
+     @SuppressWarnings("unchecked")
+     public List<String> getCNPatterns(CompactNumberFormat.Style formatStyle) {
+ 
+         Objects.requireNonNull(formatStyle);
+         List<String> compactNumberPatterns = null;
+         removeEmptyReferences();
+         String width = (formatStyle == CompactNumberFormat.Style.LONG) ? "long" : "short";
+         String cacheKey = width + "." + COMPACT_NUMBER_PATTERNS_CACHEKEY;
+         ResourceReference data = cache.get(cacheKey);
+         if (data == null || ((compactNumberPatterns
+                 = (List<String>) data.get()) == null)) {
+             ResourceBundle resource = localeData.getNumberFormatData(locale);
+             compactNumberPatterns = (List<String>) resource
+                     .getObject(width + ".CompactNumberPatterns");
+             cache.put(cacheKey, new ResourceReference(cacheKey,
+                     (Object) compactNumberPatterns, referenceQueue));
+         }
+         return compactNumberPatterns;
+     }
+ 
+ 
+     /**
       * Returns the FormatData resource bundle of this LocaleResources.
       * The FormatData should be used only for accessing extra
       * resources required by JSR 310.
       */
      public ResourceBundle getJavaTimeFormatData() {