Random Gaussian values. : Random « Development « Java Tutorial

1. Java Tutorial
2. Development
3. Random

import java.util.Random;

class RandDemo {
  public static void main(String args[]) {
    Random r = new Random();
    double val;
    double sum = 0;
    int bell[] = new int[10];

    for (int i = 0; i < 100; i++) {
      val = r.nextGaussian();
      sum += val;
      double t = -2;
      for (int x = 0; x < 10; x++, t += 0.5)
        if (val < t) {
          bell[x]++;
          break;
        }
    }
    System.out.println("Average of values: " + (sum / 100));

    for (int i = 0; i < 10; i++) {
      for (int x = bell[i]; x > 0; x--)
        System.out.print("*");
      System.out.println();
    }
  }
}