Java Fundamentals for Kids - Exercise 25

ExecutionTime.java

import java.util.concurrent.TimeUnit;
import java.util.Date;
import java.lang.Math;


/**
Program that runs a method for 3 seconds and calculates the time spent doing that execution
 */
public class ExecutionTime {

    public static void main(String[] args) {

		Date initialDate = new Date();
		
		doSomething();
		
		Date laterDate = new Date();
		
		long timespent;
		
		timespent = Math.abs(laterDate.getTime()-initialDate.getTime())/1000;
	
		System.out.println("The time consumed by this method was : " + timespent + " seconds!");
    }
	
	public static void doSomething() {
		
		System.out.println("Doing something ...");
		
		try{
			TimeUnit.SECONDS.sleep(3);
		} catch (InterruptedException e) {
			System.out.println("Some Error");
		}
	}
}