--- old/src/sample/nashorn/dateconversion.js 2020-04-15 18:53:03.000000000 +0530 +++ /dev/null 2020-04-15 18:53:03.000000000 +0530 @@ -1,73 +0,0 @@ -/* - * 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. - */ - -// Converting between #javascript Date and #java8 LocalDateTime with #nashorn - -// JavaScript Date with current time -var d = new Date(); -print(d); - -// Java 8 java.time classes used -var Instant = java.time.Instant; -var LocalDateTime = java.time.LocalDateTime; -var ZoneId = java.time.ZoneId; - -// Date.prototype.getTime - -// getTime() method returns the numeric value corresponding to the time -// for the specified date according to universal time. The value returned -// by the getTime() method is the number of milliseconds since 1 January 1970 00:00:00 UTC. -// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTime - -// Java Instant.ofEpochMilli to convert time in milliseconds to Instant object -// https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#ofEpochMilli-long- - -var instant = Instant.ofEpochMilli(d.getTime()); - -// Instant to LocalDateTime using LocalDateTime.ofInstant -// https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#ofInstant-java.time.Instant-java.time.ZoneId- - -var ldt = LocalDateTime.ofInstant(instant, ZoneId.systemDefault()); -print(ldt); - -// converting a LocalDateTime to JavaScript Date -// convert LocalDateTime to Instant first -// https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#atZone-java.time.ZoneId- - -var instant = ldt.atZone(ZoneId.systemDefault()).toInstant(); - -// instant to to epoch milliseconds -// https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#toEpochMilli-- -// and then to JavaScript Date from time in milliseconds -// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Date - -var d1 = new Date(instant.toEpochMilli()); -print(d1);