Java에서 두 날짜 사이의 기간을 어떻게 계산합니까?

import java.util.Date;
import java.util.concurrent.TimeUnit;

// Initialize your start and end dates
Date startDate = /* Set start date */;
Date endDate = /* Set end date */;

// Calculate the duration in milliseconds
long duration = endDate.getTime() - startDate.getTime();

// Use TimeUnit to convert milliseconds to desired units
long diffInSeconds = TimeUnit.MILLISECONDS.toSeconds(duration);
long diffInMinutes = TimeUnit.MILLISECONDS.toMinutes(duration);
long diffInHours = TimeUnit.MILLISECONDS.toHours(duration);
long diffInDays = TimeUnit.MILLISECONDS.toDays(duration);

// Display the results
System.out.println("Duration in seconds: " + diffInSeconds + " seconds.");
System.out.println("Duration in minutes: " + diffInMinutes + " minutes.");
System.out.println("Duration in hours: " + diffInHours + " hours.");
System.out.println("Duration in days: " + diffInDays + " days.");