simple question about the Timer

Engines, Libraries and Tools Java 3D
#1

I know that this hi res Timer thing has been discussed to death, but please bear with me, I am new to this. The following is just simple code to display the value of the Java3DTimer:

import com.sun.j3d.utils.timer.J3DTimer;
class test
{
public static void main(String[] args)
{
long time;
time = J3DTimer.getValue();
System.out.println(time);
}
}

When I run the code here is the oputput:
5993877065139

My question is what exactly does this number mean? And how can I use this timer to have an accurate frame rate. I have a simple program with an animation loop and the statement thread.sleep(30) which is 30ns. Ofcourse this is inaccurate. I was wondering how exactly do I implement the Java3DTimer in my animation loop?

Also what is WakeupOnElapsedTime(30) about? and how is it used?
Any help is greatly appreciated.

#2

First of all, if you haven’t modified the thread and are talking about the same thing as me thread.sleep is ms. 1ms is 1000 000 ns. J3D timer gives out ns therefore you have to get the fps you have to use fps = (long) 1000000 /(J3DTimer.getValue() - StartTime)/ (long) Interval;

and starttime is the value you take vefore you execute the loop.

The way you implement it? It is good to use at any place where you use the System.getMillis() thing, because that is very inaccurate even in milliseconds.