ch06/random2/NeedleSimulator.java
 /**
 This program simulates the Buffon needle experiment
 and prints the resulting approximations of pi.
 */
 public class NeedleSimulator
 {
 public static void main(String[] args)
{
 Needle n = new Needle();
 final int TRIES1 = 10000;
 final int TRIES2 = 1000000;

 for (int i = 1; i <= TRIES1; i++)
 n.drop();
 System.out.printf("Tries = %d, Tries / Hits = %8.5f\n",
 TRIES1, (double) n.getTries() / n.getHits());

 for (int i = TRIES1 + 1; i <= TRIES2; i++)
 n.drop();
 System.out.printf("Tries = %d, Tries / Hits = %8.5f\n",
 TRIES2, (double) n.getTries() / n.getHits());
 }
 }