Mercurial > jdk8-mips64-public > nashorn / file revision

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 // 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);