Generates Random Floating Point Numbers

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));

  }

}





An example run of this class:

Generated : 99.38221153454624

Generated : 100.95717075067498

Generated : 106.78740794978813

Generated : 105.57315286730545

Generated : 97.35077643206589

Generated : 92.56233774920052

Generated : 98.29311772993057

Generated : 102.04954815575822

Generated : 104.88458607780176

Generated : 97.11126014402141