How to obtain the start time and end time of a day?

Question

How to obtain the start time and end time of a day?

code like this is not accurate:

 private Date getStartOfDay(Date date) {
    Calendar calendar =          


        

Answer 1

Additional way of finding start of day with java8 java.time.ZonedDateTime instead of going through LocalDateTime is simply truncating the input ZonedDateTime to DAYS:

zonedDateTimeInstance.truncatedTo( ChronoUnit.DAYS );