import java.time.Instant;

import java.time.LocalDateTime;

import java.time.format.DateTimeFormatter;

public class TimestampTracker {

private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS");

public static void main(String[] args) {

// Start tracking

LocalDateTime startTime = LocalDateTime.now();

long startEpoch = Instant.now().toEpochMilli();

try {

// Simulate some work

simulateWork();

// End tracking

LocalDateTime endTime = LocalDateTime.now();

long endEpoch = Instant.now().toEpochMilli();

// Calculate duration

long durationMillis = endEpoch - startEpoch;

// Print results

System.out.println("Start Time: " + startTime.format(formatter));

System.out.println("End Time: " + endTime.format(formatter));

System.out.println("Execution Duration: " + durationMillis + " ms");

} catch (Exception e) {

System.err.println("An error occurred: " + e.getMessage());

}

}

private static void simulateWork() throws Exception {

// Replace this with your actual script logic

Thread.sleep(1000); // Simulate 1 second of work

System.out.println("Performing some operation...");

Thread.sleep(500); // Simulate another 0.5 seconds of work

}

}