Find total hours between two Dates

Question

I have two Date objects and I need to get the time difference so I can determine the total hours between them. They happen to be from the same day. The result I would like w

Answer 1

Here's a pure Java 8+ solution that does not involve Joda or mathematical operations

import java.time.*;
import java.time.temporal.*;

// given two java.util.Dates
Date startDate ...
Date endDate ...

// convert them to ZonedDateTime instances
ZonedDateTime start = ZonedDateTime.ofInstant(startDate.toInstant(), ZoneId.systemDefault());
ZonedDateTime end = ZonedDateTime.ofInstant(endDate.toInstant(), ZoneId.systemDefault());

// get the total duration of minutes between them
Duration total = Duration.ofMinutes(ChronoUnit.MINUTES.between(start, end));

// use the duration to determine the hours and minutes values
long hours = total.toHours();
long minutes = total.minusHours(hours).toMinutes();