Java has a nanosecond timer!

Java has a nanosecond timer!

It works well too.

Quick test script:

We do empty loops of varying numbers of iterations, and use the nanotimer to test how long that takes:

for( int its = 0; its < 100; its++ ) {
    long start = System.nanoTime();
    for( int i = 0; i < its; i++ ) {
    }
    long delta = System.nanoTime() - start;
    System.out.println("its " + its + ": " + delta );
}

Java timer test

Example to show java timer:

import java.util.Calendar;
import java.util.Timer;
import java.util.TimerTask;

public class TestTimerTask {
    public static void main(String[] args) { 

//define a timer 

final Timer timer = new Timer("Test Timer"); 

timer.scheduleAtFixedRate(new TimerTask() {
            public void run() {
                System.out.println("Timer fired");
            }
        }, Calendar.getInstance().getTime(), 5 * 1000);

        Runtime.getRuntime().addShutdownHook(new Thread() {
            public void run() {
                System.out.println("Canceling timer");
                timer.cancel();
            }
        });
    }
}