Use a timer to count the time to complete a function in Java

JavaTimer.java

import java.util.concurrent.TimeUnit;

public class JavaTimer{

     public static void main(String []args){
         
        long start_time =System.nanoTime();
       //Create a delay of 1 second or 1000milliseconds
        try{
            Thread.sleep(1000);
        }catch (InterruptedException e){
            System.out.println(e);}
        long end_time = System.nanoTime();
        long elapsed_time_in_nanoseconds = end_time - start_time;
        long elapsed_time_in_s = TimeUnit.SECONDS.convert(elapsed_time_in_nanoseconds, TimeUnit.NANOSECONDS);
        System.out.println("Elapsed time: "+elapsed_time_in_s+"second(s)");
        
     }
}