Java utiliser math random

import java.util.Random;

/** 
Generate pseudo-random floating point values, with an 
approximately Gaussian (normal) distribution.

Many physical measurements have an approximately Gaussian 
distribution; this provides a way of simulating such values. 
*/
public final class RandomGaussian {
  
  public static void main(String... aArgs){
    RandomGaussian gaussian = new RandomGaussian();
    double MEAN = 100.0f; 
    double VARIANCE = 5.0f;
    for (int idx = 1; idx <= 10; ++idx){
      log("Generated : " + gaussian.getGaussian(MEAN, VARIANCE));
    }
  }
    
  private Random fRandom = new Random();
  
  private double getGaussian(double aMean, double aVariance){
      return aMean + fRandom.nextGaussian() * aVariance;
  }

  private static void log(Object aMsg){
    System.out.println(String.valueOf(aMsg));
  }
} 

public static void main(String[] args) 
{ 
   System.out.println("On utilise les codes une premiere fois");

   String date1 = "24/03/2011 08:00";
   String date2 = "01/04/2011 16:00";
   String date3 = "05/05/2011 19:00";

   System.out.println(date1.hashCode());
   System.out.println(date2.hashCode());
   System.out.println(date3.hashCode());		

   System.out.println("On utilise les codes une deuxieme fois");

   String date4 = "24/03/2011 08:00";
   String date5 = "01/04/2011 16:00";
   String date6 = "05/05/2011 19:00";

   System.out.println(date4.hashCode());
   System.out.println(date5.hashCode());
   System.out.println(date6.hashCode());
}