diff -r b129e9cbab87 -r 3f4320a01539 samples/mothers_day.js --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/samples/mothers_day.js Fri Sep 04 17:17:44 2015 +0530 @@ -0,0 +1,56 @@ +# compute Mothers day of the given the year + +/* + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of Oracle nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +// print "Mother's day" of the given year using Java Time API + +if (arguments.length == 0) { + print("Usage: jjs mothers_day.js -- year"); + exit(1); +} + +// java classes used +var DayOfWeek = java.time.DayOfWeek; +var LocalDate = java.time.LocalDate; +var TemporalAdjusters = java.time.temporal.TemporalAdjusters; + +var year = parseInt(arguments[0]); + +// See: https://en.wikipedia.org/?title=Mother%27s_Day +// We need second Sunday of May. Make April 30 of the given +// year adjust and adjust to next Sunday from there twice. To adjust a Date +// we use a common TemporalAdjuster provided in JDK8. +// https://docs.oracle.com/javase/8/docs/api/java/time/temporal/TemporalAdjusters.html + +print(LocalDate.of(year, 4, 30). + with(TemporalAdjusters.next(DayOfWeek.SUNDAY)). + with(TemporalAdjusters.next(DayOfWeek.SUNDAY)));