Calculating execution time of program in java 8

• Instance is a java 8 datime time API object
• TimeUnit class which class sleep method indirectly class Thread.sleep method but we use TimeUnit class because it is more readable.
• We calculate the difference between instance using Duration class and print it at the end

import java.time.Duration;
import java.time.Instant;
import java.util.concurrent.TimeUnit;

public class CalculateExecutionTime {
	public static void main(String[] args) throws InterruptedException {
		Instant start = Instant.now();
		TimeUnit.SECONDS.sleep(5);
		Instant finish = Instant.now();
		long timeElapsed = Duration.between(start, finish).toMillis()/1000;  //in millis
		System.out.println("Execution time in Seconds: "+timeElapsed);
	}
}