jdk8-mips64-public/nashorn: samples/dateconversion.js@c21cf096431b (annotated)

samples/dateconversion.js@c21cf096431b (annotated)

samples/dateconversion.js

Wed, 18 Oct 2017 09:15:26 -0700

author: asaha
date: Wed, 18 Oct 2017 09:15:26 -0700
changeset 2196: c21cf096431b
parent 1401: da52a33a5e93
permissions: -rw-r--r--

Added tag jdk8u161-b03 for changeset e33ecc88dd63

 /*
  * 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);