1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.util.Arrays;
  25 import java.util.Locale;
  26 import java.util.Set;
  27 import java.util.TreeSet;
  28 import java.util.stream.Collectors;
  29 
  30 class GetAvailableLocales {
  31 
  32     public static void main(String[] args) {
  33         Set<String> expected = Set.of(args);
  34         Set<String> actual =
  35             Arrays.stream(Locale.getAvailableLocales())
  36                   // "(root)" for Locale.ROOT rather than ""
  37                   .map(loc -> loc.equals(Locale.ROOT) ? "(root)" : loc.toString())
  38                   .collect(Collectors.toSet());
  39 
  40         if (!expected.equals(actual)) {
  41             diff(expected, actual);
  42             System.exit(1);
  43         }
  44     }
  45 
  46     private static void diff(Set<String> expected, Set<String> actual) {
  47         Set<String> s1 = new TreeSet<>(expected);
  48         s1.removeAll(actual);
  49         if (!s1.isEmpty()) {
  50             System.out.println("\tMissing locale(s): " + s1);
  51         }
  52         Set<String> s2 = new TreeSet<>(actual);
  53         s2.removeAll(expected);
  54         if (!s2.isEmpty()) {
  55             System.out.println("\tExtra locale(s): " + s2);
  56         }
  57     }
  58 }