1 /* 2 * Copyright (c) 2004, 2016, 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 5097350 27 * @summary Make sure that TimeZone.getTimeZone returns a clone of a cached TimeZone instance. 28 */ 29 30 import java.util.*; 31 import java.text.*; 32 33 public class Bug5097350 { 34 public static void main(String[] args) { 35 String[] tzids = TimeZone.getAvailableIDs(); 36 List<String> ids = new ArrayList<>(tzids.length + 10); 37 ids.addAll(Arrays.asList(tzids)); 38 // add some custom ids 39 ids.add("GMT+1"); 40 ids.add("GMT-7:00"); 41 ids.add("GMT+10:20"); 42 ids.add("GMT-00:00"); 43 ids.add("GMT+00:00"); 44 45 for (String id : ids) { 46 test(id); 47 } 48 } 49 50 private static void test(String id) { 51 TimeZone tz1 = TimeZone.getTimeZone(id); 52 int offset1 = tz1.getRawOffset(); 53 tz1.setRawOffset(offset1 + 13 * 60 * 60 * 1000); 54 55 TimeZone tz2 = TimeZone.getTimeZone(id); 56 if (tz1 == tz2) { 57 throw new RuntimeException("TimeZones are identical: " + id); 58 } 59 if (offset1 != tz2.getRawOffset()) { 60 throw new RuntimeException("Offset changed through aliasing: " + id); 61 } 62 } 63 } 64