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 finish =;
		long timeElapsed = Duration.between(start, finish).toMillis()/1000;  //in millis
		System.out.println("Execution time in Seconds: "+timeElapsed);

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