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

*** 1,7 ****
  /*
!  * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 38,53 ****
--- 38,55 ----
   * Taligent is a registered trademark of Taligent, Inc.
   */
  
  package sun.util.locale.provider;
  
+ import java.text.CompactNumberFormat;
  import java.text.DecimalFormat;
  import java.text.DecimalFormatSymbols;
  import java.text.NumberFormat;
  import java.text.spi.NumberFormatProvider;
  import java.util.Currency;
  import java.util.Locale;
+ import java.util.Objects;
  import java.util.Set;
  
  /**
   * Concrete implementation of the  {@link java.text.spi.NumberFormatProvider
   * NumberFormatProvider} class for the JRE LocaleProviderAdapter.
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                  }
              }
          }
      }
  
+     /**
+      * Returns a new {@code NumberFormat} instance which formats
+      * a number in its compact form for the specified
+      * {@code locale} and {@code formatStyle}.
+      *
+      * @param locale the desired locale
+      * @param formatStyle the style for formatting a number
+      * @throws NullPointerException if {@code locale} or {@code formatStyle}
+      *     is {@code null}
+      * @throws IllegalArgumentException if {@code locale} isn't
+      *     one of the locales returned from
+      *     {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
+      *     getAvailableLocales()}.
+      * @return a compact number formatter
+      *
+      * @see java.text.NumberFormat#getCompactNumberInstance(Locale,
+      *                      NumberFormat.Style)
+      * @since 12
+      */
+     @Override
+     public NumberFormat getCompactNumberInstance(Locale locale,
+             NumberFormat.Style formatStyle) {
+ 
+         Objects.requireNonNull(locale);
+         Objects.requireNonNull(formatStyle);
+ 
+         // Check for region override
+         Locale override = locale.getUnicodeLocaleType("nu") == null
+                 ? CalendarDataUtility.findRegionOverride(locale)
+                 : locale;
+ 
+         LocaleProviderAdapter adapter = LocaleProviderAdapter.forType(type);
+         LocaleResources resource = adapter.getLocaleResources(override);
+ 
+         String[] numberPatterns = resource.getNumberPatterns();
+         DecimalFormatSymbols symbols = DecimalFormatSymbols.getInstance(override);
+         String[] cnPatterns = resource.getCNPatterns(formatStyle);
+ 
+         CompactNumberFormat format = new CompactNumberFormat(numberPatterns[0],
+                 symbols, cnPatterns);
+         return format;
+     }
+ 
      @Override
      public Set<String> getAvailableLanguageTags() {
          return langtags;
      }
  }