1/* 2 * Copyright (c) 2012, 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 * Portions Copyright (c) 2012, IBM Corporation 26 */ 27 28/* 29 * @test 30 * @bug 7123229 31 * @summary (coll) EnumMap.containsValue(null) returns true 32 * @author ngmr 33 */ 34 35import java.util.EnumMap; 36import java.util.Map; 37 38public class UniqueNullValue { 39 static enum TestEnum { e00, e01 } 40 41 public static void main(String[] args) { 42 Map<TestEnum, Integer> map = new EnumMap<>(TestEnum.class); 43 44 map.put(TestEnum.e00, 0); 45 if (false == map.containsValue(0)) { 46 throw new RuntimeException("EnumMap unexpectedly missing 0 value"); 47 } 48 if (map.containsValue(null)) { 49 throw new RuntimeException("EnumMap unexpectedly holds null value"); 50 } 51 52 map.put(TestEnum.e00, null); 53 if (map.containsValue(0)) { 54 throw new RuntimeException("EnumMap unexpectedly holds 0 value"); 55 } 56 if (false == map.containsValue(null)) { 57 throw new RuntimeException("EnumMap unexpectedly missing null value"); 58 } 59 } 60} 61