How to Calculate the Duration Between Two Dates in Java?

Determining the Duration Between Two Dates in Java

To calculate the duration of the difference between two dates represented as a DateTime object, the following approach can be adopted:

Java Built-In Class: TimeUnit

Java's TimeUnit class offers a convenient way to handle date differences. It provides various utility methods for converting from milliseconds to different units such as seconds, minutes, hours, and days.

To use TimeUnit, first determine the duration by subtracting the milliseconds represented by the start date from the end date:

long duration = endDate.getTime() - startDate.getTime();

Then, convert the duration to the desired unit using the appropriate utility method:

long diffInSeconds = TimeUnit.MILLISECONDS.toSeconds(duration);
long diffInMinutes = TimeUnit.MILLISECONDS.toMinutes(duration);
long diffInHours = TimeUnit.MILLISECONDS.toHours(duration);
long diffInDays = TimeUnit.MILLISECONDS.toDays(duration);

By employing TimeUnit, the code becomes more concise and handles date differences in a comprehensive manner. The converted durations can then be presented in the desired format, including days, hours, minutes, and seconds.

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