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 21 * questions. 22 */ 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 }