/*

 * Copyright (c) 1998, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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 */

/*

 * @test

 * @bug 4028518

 * @summary Make sure cloned GregorianCalendar is unchanged by modifying its original.

 */

import java.util.GregorianCalendar ;

import static java.util.Calendar.*;

public class bug4028518 {

    public static void main(String[] args)

    {

        GregorianCalendar cal1 = new GregorianCalendar() ;

        GregorianCalendar cal2 = (GregorianCalendar) cal1.clone() ;

        printdate(cal1, "cal1: ") ;

        printdate(cal2, "cal2 - cloned(): ") ;

        cal1.add(DAY_OF_MONTH, 1) ;

        printdate(cal1, "cal1 after adding 1 day: ") ;

        printdate(cal2, "cal2 should be unmodified: ") ;

        if (cal1.get(DAY_OF_MONTH) == cal2.get(DAY_OF_MONTH)) {

            throw new RuntimeException("cloned GregorianCalendar modified");

        }

    }

    private static void printdate(GregorianCalendar cal, String string)

    {

        System.out.println(string + (cal.get(MONTH) + 1)

                           + "/" + cal.get(DAY_OF_MONTH)

                           + "/" + cal.get(YEAR)) ;

    }

}