1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/samples/dateconversion.js Mon Jun 08 17:59:32 2015 +0530
1.3 @@ -0,0 +1,73 @@
1.4 +/*
1.5 + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
1.6 + *
1.7 + * Redistribution and use in source and binary forms, with or without
1.8 + * modification, are permitted provided that the following conditions
1.9 + * are met:
1.10 + *
1.11 + * - Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + *
1.14 + * - Redistributions in binary form must reproduce the above copyright
1.15 + * notice, this list of conditions and the following disclaimer in the
1.16 + * documentation and/or other materials provided with the distribution.
1.17 + *
1.18 + * - Neither the name of Oracle nor the names of its
1.19 + * contributors may be used to endorse or promote products derived
1.20 + * from this software without specific prior written permission.
1.21 + *
1.22 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.23 + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.24 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.25 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.26 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.27 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.28 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.29 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.30 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.31 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.32 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.33 + */
1.34 +
1.35 +// Converting between #javascript Date and #java8 LocalDateTime with #nashorn
1.36 +
1.37 +// JavaScript Date with current time
1.38 +var d = new Date();
1.39 +print(d);
1.40 +
1.41 +// Java 8 java.time classes used
1.42 +var Instant = java.time.Instant;
1.43 +var LocalDateTime = java.time.LocalDateTime;
1.44 +var ZoneId = java.time.ZoneId;
1.45 +
1.46 +// Date.prototype.getTime
1.47 +
1.48 +// getTime() method returns the numeric value corresponding to the time
1.49 +// for the specified date according to universal time. The value returned
1.50 +// by the getTime() method is the number of milliseconds since 1 January 1970 00:00:00 UTC.
1.51 +// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTime
1.52 +
1.53 +// Java Instant.ofEpochMilli to convert time in milliseconds to Instant object
1.54 +// https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#ofEpochMilli-long-
1.55 +
1.56 +var instant = Instant.ofEpochMilli(d.getTime());
1.57 +
1.58 +// Instant to LocalDateTime using LocalDateTime.ofInstant
1.59 +// https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#ofInstant-java.time.Instant-java.time.ZoneId-
1.60 +
1.61 +var ldt = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
1.62 +print(ldt);
1.63 +
1.64 +// converting a LocalDateTime to JavaScript Date
1.65 +// convert LocalDateTime to Instant first
1.66 +// https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#atZone-java.time.ZoneId-
1.67 +
1.68 +var instant = ldt.atZone(ZoneId.systemDefault()).toInstant();
1.69 +
1.70 +// instant to to epoch milliseconds
1.71 +// https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#toEpochMilli--
1.72 +// and then to JavaScript Date from time in milliseconds
1.73 +// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Date
1.74 +
1.75 +var d1 = new Date(instant.toEpochMilli());
1.76 +print(d1);
