sundar@1524: /*
sundar@1524:  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
sundar@1524:  *
sundar@1524:  * Redistribution and use in source and binary forms, with or without
sundar@1524:  * modification, are permitted provided that the following conditions
sundar@1524:  * are met:
sundar@1524:  *
sundar@1524:  *   - Redistributions of source code must retain the above copyright
sundar@1524:  *     notice, this list of conditions and the following disclaimer.
sundar@1524:  *
sundar@1524:  *   - Redistributions in binary form must reproduce the above copyright
sundar@1524:  *     notice, this list of conditions and the following disclaimer in the
sundar@1524:  *     documentation and/or other materials provided with the distribution.
sundar@1524:  *
sundar@1524:  *   - Neither the name of Oracle nor the names of its
sundar@1524:  *     contributors may be used to endorse or promote products derived
sundar@1524:  *     from this software without specific prior written permission.
sundar@1524:  *
sundar@1524:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
sundar@1524:  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
sundar@1524:  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sundar@1524:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
sundar@1524:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
sundar@1524:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
sundar@1524:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
sundar@1524:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
sundar@1524:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
sundar@1524:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
sundar@1524:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sundar@1524:  */
sundar@1524: 
sundar@1524: // converting b/w JavaScript Date and Java LocalDateTime
sundar@1524: 
sundar@1524: // JavaScript Date with current time
sundar@1524: var d = new Date();
sundar@1524: print(d);
sundar@1524:  
sundar@1524: // Java 8 java.time classes used
sundar@1524: var Instant = java.time.Instant;
sundar@1524: var LocalDateTime = java.time.LocalDateTime;
sundar@1524: var ZoneId = java.time.ZoneId;
sundar@1524:  
sundar@1524: // Date.prototype.getTime
sundar@1524: 
sundar@1524: // getTime() method returns the numeric value corresponding to the time
sundar@1524: // for the specified date according to universal time. The value returned
sundar@1524: // by the getTime() method is the number of milliseconds since 1 January 1970 00:00:00 UTC.
sundar@1524: // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTime
sundar@1524:  
sundar@1524: // Java Instant.ofEpochMilli to convert time in milliseconds to Instant object
sundar@1524: // https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#ofEpochMilli-long-
sundar@1524:  
sundar@1524: var instant = Instant.ofEpochMilli(d.getTime());
sundar@1524:  
sundar@1524: // Instant to LocalDateTime using LocalDateTime.ofInstant
sundar@1524: // https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#ofInstant-java.time.Instant-java.time.ZoneId-
sundar@1524:  
sundar@1524: var ldt = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
sundar@1524: print(ldt);
sundar@1524:  
sundar@1524: // converting a LocalDateTime to JavaScript Date
sundar@1524: // convert LocalDateTime to Instant first
sundar@1524: // https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#atZone-java.time.ZoneId-
sundar@1524:  
sundar@1524: var instant = ldt.atZone(ZoneId.systemDefault()).toInstant();
sundar@1524:  
sundar@1524: // instant to to epoch milliseconds
sundar@1524: // https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#toEpochMilli--
sundar@1524: // and then to JavaScript Date from time in milliseconds
sundar@1524: // https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Date
sundar@1524: 
sundar@1524: var d1 = new Date(instant.toEpochMilli());
sundar@1524: print(d1);