Roll a six-sided die 6000 times. - Java Language Basics

Java examples for Language Basics:Random

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Description

Roll a six-sided die 6000 times.

Demo Code

import java.security.SecureRandom;

public class Main 
{
   public static void main(String[] args)
   {/*  w ww. j  a va2  s .  c  o  m*/
      // randomNumbers object will produce secure random numbers
      SecureRandom randomNumbers = new SecureRandom();

      int frequency1 = 0; // count of 1s rolled
      int frequency2 = 0; // count of 2s rolled
      int frequency3 = 0; // count of 3s rolled
      int frequency4 = 0; // count of 4s rolled
      int frequency5 = 0; // count of 5s rolled
      int frequency6 = 0; // count of 6s rolled
   
      // tally counts for 6,000,000 rolls of a die
      for (int roll = 1; roll <= 6000000; roll++) 
      {
         int face = 1 + randomNumbers.nextInt(6); // number from 1 to 6
   
         // use face value 1-6 to determine which counter to increment
         switch (face) 
         {   
            case 1:
               ++frequency1; // increment the 1s counter
               break; 
            case 2:
               ++frequency2; // increment the 2s counter
               break;
            case 3:
               ++frequency3; // increment the 3s counter
               break;
            case 4:
               ++frequency4; // increment the 4s counter
               break;
            case 5:
               ++frequency5; // increment the 5s counter
               break;
            case 6:
               ++frequency6; // increment the 6s counter
               break;
         } 
      } 

      System.out.println("Face\tFrequency"); // output headers
      System.out.printf("1\t%d%n2\t%d%n3\t%d%n4\t%d%n5\t%d%n6\t%d%n",
         frequency1, frequency2, frequency3, frequency4,
         frequency5, frequency6);
   }
}

Result


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