1 /*
   2  * Copyright (c) 2015, 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
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  22  */
  23 
  24 
  25 /**
  26  * @test
  27  * @bug 8080535
  28  * @summary Expected size of Character.UnicodeBlock.map is not optimal
  29  */
  30 
  31 import java.lang.reflect.Field;
  32 import java.util.Map;
  33 
  34 public class NonOptimalMapSize {
  35     public static void main(String[] args) throws Throwable {
  36         Class<?> ubCls = Character.UnicodeBlock.class;
  37         Field mapField = ubCls.getDeclaredField("map");
  38         mapField.setAccessible(true);
  39         Map<?,?> map = (Map<?,?>)mapField.get(null);
  40 
  41         Field sizeField = ubCls.getDeclaredField("EXPECTED_MAP_SIZE");
  42         sizeField.setAccessible(true);
  43         int EXPECTED_MAP_SIZE = sizeField.getInt(null);
  44 
  45         if (EXPECTED_MAP_SIZE < map.size()) {
  46             throw new RuntimeException("expected size " +
  47                     EXPECTED_MAP_SIZE +
  48                     " is less than the real map size " +
  49                     map.size());
  50         }
  51     }
  52 }