import java.time.Duration;

import java.time.Instant;

import java.util.List;

import java.util.ArrayList;

public class TimeExporter {

/**

* Exports time differences as a list of strings.

* @param startTimes A list of Instant objects representing start times.

* @param endTimes A list of Instant objects representing end times.

* @return A list of strings, where each string represents the duration

* between the corresponding start and end time. Returns an empty list

* if input lists are null or have different sizes.

*/

public static List<String> exportTimeDifferences(List<Instant> startTimes, List<Instant> endTimes) {

if (startTimes == null || endTimes == null || startTimes.size() != endTimes.size()) {

return new ArrayList<>(); // Return empty list for invalid input

}

List<String> results = new ArrayList<>();

for (int i = 0; i < startTimes.size(); i++) {

Duration duration = Duration.between(startTimes.get(i), endTimes.get(i));

results.add(duration.toString()); // Convert Duration to string

}

return results;

}

public static void main(String[] args) {

//Example Usage

List<Instant> startTimes = new ArrayList<>();

startTimes.add(Instant.now());

startTimes.add(Instant.now());

startTimes.add(Instant.now());

List<Instant> endTimes = new ArrayList<>();

endTimes.add(Instant.now().plusSeconds(5));

endTimes.add(Instant.now().plusSeconds(10));

endTimes.add(Instant.now().plusSeconds(15));

List<String> timeDifferences = exportTimeDifferences(startTimes, endTimes);

for (String diff : timeDifferences) {

System.out.println(diff);

}

}

}