1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
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  23 
  24 /**
  25  * @test
  26  * @bug 8080535
  27  * @summary Expected size of Character.UnicodeBlock.map is not optimal
  28  * @library /lib/testlibrary
  29  * @build jdk.testlibrary.OptimalCapacity
  30  * @run main OptimalMapSize
  31  */
  32 
  33 import jdk.testlibrary.OptimalCapacity;
  34 
  35 // What will be the number of the Unicode blocks in the future.
  36 //
  37 // According to http://www.unicode.org/versions/Unicode7.0.0/ ,
  38 // in Unicode 7 there will be added 32 new blocks (96 with aliases).
  39 // According to http://www.unicode.org/versions/beta-8.0.0.html ,
  40 // in Unicode 8 there will be added 10 more blocks (30 with aliases).
  41 //
  42 // After implementing support of Unicode 7 and 8 in Java, there will
  43 // be 510+96+30 = 636 entries in Character.UnicodeBlock.map.
  44 //
  45 // Initialization of the map and this test will have to be adjusted
  46 // accordingly then.
  47 
  48 public class OptimalMapSize {
  49     public static void main(String[] args) throws Throwable {
  50         // The initial size of Character.UnicodeBlock.map.
  51         // See src/java.base/share/classes/java/lang/Character.java
  52         int initialCapacity = (int)(510 / 0.75f + 1.0f);
  53 
  54         OptimalCapacity.ofHashMap(Character.UnicodeBlock.class,
  55                 "map", initialCapacity);
  56     }
  57 }