Rolling a die 6,000,000 times using Random Stream - Java Lambda Stream

Java examples for Lambda Stream:Stream

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Description

Rolling a die 6,000,000 times using Random Stream

Demo Code

import java.security.SecureRandom;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.IntStream;
import java.util.stream.Collectors;

public class Main
{
   public static void main(String[] args)
   {//from   www .  j a  va 2 s.com
      SecureRandom random = new SecureRandom();

      // roll a die 6,000,000 times and summarize the results
      System.out.printf("%-6s%s%n", "Face", "Frequency");
      random.ints(6_000_000, 1, 7)
            .boxed()
            .collect(Collectors.groupingBy(Function.identity(),
               Collectors.counting()))
            .forEach((face, frequency) -> 
               System.out.printf("%-6d%d%n", face, frequency));
   } 
}

Result


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