package a001_nano_sleep;

public class Test01 {

public static void main(String[] args) throws InterruptedException {

final int[] nano_sleep = { 999999, 99999, 9999, 999, 99, 9 };

for (int i : nano_sleep) {

System.out.println("=========>" + i);

a(i);

b(i);

System.out.println("");

}

}

static void a(final int nano_sleep) throws InterruptedException {

final long l1 = System.nanoTime();

Thread.sleep(0, nano_sleep);

final long l2 = System.nanoTime();

System.out.printf("%d %d %07d%n", l1, l2, l2 - l1);

}

static void b(final int nano_sleep) {

final long l1 = System.nanoTime();

{

long start = System.nanoTime();

while (start + nano_sleep >= System.nanoTime())

;

}

final long l2 = System.nanoTime();

System.out.printf("%d %d %07d%n", l1, l2, l2 - l1);

}

}