While loop with small Thread.Sleep vs. Java Timer?

Question

I have a program that needs to execute a process at a very precise time. The way I have currently approached it is:

while( ( exTime - System.currentTimeMillis() ) > randomNum )
{
    try
    {
        Thread.sleep(0, 5000); //Sleep for 5000 nanoseconds, or 0.000005 seconds
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}
//Code to be executed after time is over.

I know it is also possible to use a Java timer for this.

My question is what is the most efficient, and what is most accurate? I am running over 100 threads with the while-loop. Will using a timer save more resources and be more accurate?

Answer 1

Using a Timer will be accurate. For resources you can check