1 /* 2 * Copyright (c) 1998, 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 4028518 27 * @summary Make sure cloned GregorianCalendar is unchanged by modifying its original. 28 */ 29 30 import java.util.GregorianCalendar ; 31 import static java.util.Calendar.*; 32 33 public class bug4028518 { 34 35 public static void main(String[] args) 36 { 37 GregorianCalendar cal1 = new GregorianCalendar() ; 38 GregorianCalendar cal2 = (GregorianCalendar) cal1.clone() ; 39 40 printdate(cal1, "cal1: ") ; 41 printdate(cal2, "cal2 - cloned(): ") ; 42 cal1.add(DAY_OF_MONTH, 1) ; 43 printdate(cal1, "cal1 after adding 1 day: ") ; 44 printdate(cal2, "cal2 should be unmodified: ") ; 45 if (cal1.get(DAY_OF_MONTH) == cal2.get(DAY_OF_MONTH)) { 46 throw new RuntimeException("cloned GregorianCalendar modified"); 47 } 48 } 49 50 private static void printdate(GregorianCalendar cal, String string) 51 { 52 System.out.println(string + (cal.get(MONTH) + 1) 53 + "/" + cal.get(DAY_OF_MONTH) 54 + "/" + cal.get(YEAR)) ; 55 } 56 }