Duração do lançamento de Java para Long
Duration d = Duration.ofHours(1); // 1 hour with java.time
long millis = d.toMillis(); // 1 hour in milliseconds
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Duration d = Duration.ofHours(1); // 1 hour with java.time
long millis = d.toMillis(); // 1 hour in millisecondsString string_date = "12-December-2012";
SimpleDateFormat f = new SimpleDateFormat("dd-MMM-yyyy");
try {
Date d = f.parse(string_date);
long milliseconds = d.getTime();
} catch (ParseException e) {
e.printStackTrace();
}//The Date constructor (click the link!) accepts the time as long in milliseconds, not seconds.
long currentDateTime = System.currentTimeMillis();
//creating Date from millisecond
Date currentDate = new Date(currentDateTime);