public class BusyDelay {
  public static void main(String [] args) {
    long start = System.currentTimeMillis();
    System.out.println("Strarting at "+start);
    long delay = 1000; // 1 second = 1000 ms
    while (System.currentTimeMillis() < start+delay) 
      ; // no op
    System.out.println("Ending at "+System.currentTimeMillis());
  }
}