Quelle Bug6902861.java Sprache: JAVA

/*
* Copyright (c) 2013, 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* questions.
*/

/*
* @test
* @bug 6902861
* @summary Test for a workaround when WEEK_OF_YEAR and YEAR are out of sync.
* @modules jdk.localedata
*/

import java.util.*;
import static java.util.GregorianCalendar.*;

public class Bug6902861 {
    static int errors = 0;

    public static void main(String [] args) {
        Locale loc = Locale.getDefault();
        try {
            Locale.setDefault(Locale.GERMANY);
            test(2010, JANUARY, 1, +1, 1);
            test(2010, JANUARY, 1, +2, 2);
            test(2010, JANUARY, 1, -1, 52);
            test(2010, JANUARY, 1, -2, 51);
            test(2008, DECEMBER, 31, +1, 1);
            test(2008, DECEMBER, 31, +2, 2);
            test(2008, DECEMBER, 31, -1, 52);
            test(2008, DECEMBER, 31, -2, 51);
            if (errors > 0) {
                throw new RuntimeException("Failed");
            }
        } finally {
            Locale.setDefault(loc);
        }
    }

    static void test(int year, int month, int dayOfMonth, int amount, int expected) {
        Calendar calendar = new GregorianCalendar(year, month, dayOfMonth);
        int week = calendar.get(WEEK_OF_YEAR); // fix the date
        calendar.roll(WEEK_OF_YEAR, amount);
        int got = calendar.get(WEEK_OF_YEAR);
        int y = calendar.get(YEAR);
        if (got != expected || y != year) {
            String date = String.format("%04d-%02d-%02d", year, month+1, dayOfMonth);
            System.err.printf("%s: roll %+d: got: %d,%2d; expected: %d,%2d%n",
                              date, amount, y, got, year, expected);
            errors++;
        }
    }
}

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