1/* 2 * Copyright (c) 2011, 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) 2011 IBM Corporation 26 */ 27 28/* 29 * @test 30 * @bug 6312706 31 * @summary Sets from Map.entrySet() return distinct objects for each Entry 32 * @author Neil Richards <neil.richards@ngmr.net>, <neil_richards@uk.ibm.com> 33 */ 34 35import java.util.EnumMap; 36import java.util.HashSet; 37import java.util.Map; 38import java.util.Set; 39 40public class DistinctEntrySetElements { 41 static enum TestEnum { e00, e01, e02 } 42 43 public static void main(String[] args) throws Exception { 44 final EnumMap<TestEnum, String> enumMap = new EnumMap<>(TestEnum.class); 45 46 for (TestEnum e : TestEnum.values()) { 47 enumMap.put(e, e.name()); 48 } 49 50 Set<Map.Entry<TestEnum, String>> entrySet = enumMap.entrySet(); 51 HashSet<Map.Entry<TestEnum, String>> hashSet = new HashSet<>(entrySet); 52 53 if (false == hashSet.equals(entrySet)) { 54 throw new RuntimeException("Test FAILED: Sets are not equal."); 55 } 56 if (hashSet.hashCode() != entrySet.hashCode()) { 57 throw new RuntimeException("Test FAILED: Set's hashcodes are not equal."); 58 } 59 } 60} 61