Package craterdog.utils

Class RandomUtils

java.lang.Object
craterdog.utils.RandomUtils
public class RandomUtils extends Object
This utility class contains static methods that generate random values for various purposes.
Author:
Derk Norton

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final SecureRandom
    generator
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static byte[]
    generateRandomBytes(int numberOfBytes)
    This utility method returns a byte array of the specified size containing randomly generated bytes.
    static double
    pickRandomGaussian()
    This utility method returns a Gaussian distributed randomly generated double value.
    static int
    pickRandomIndex(int range)
    This utility method randomly selects an index from a range of indexes.
    static int
    pickRandomInt()
    This utility method returns a randomly generated integer value.
    static double
    pickRandomProbability()
    This utility method returns an evenly distributed randomly generated double value.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

  • Method Details

    • pickRandomInt

      public static int pickRandomInt()
      This utility method returns a randomly generated integer value.
      Returns:
      The randomly selected integer value.

    • pickRandomIndex

      public static int pickRandomIndex(int range)
      This utility method randomly selects an index from a range of indexes. It is useful for randomly selecting an element of a list or array. For example: int randomIndex = RandomUtils.pickRandomIndex(list.size()); Note, the maximum possible index will be one less than the range (0..range-1).
      Parameters:
      range - The size of the index range (including 0).
      Returns:
      The randomly selected index value.

    • pickRandomProbability

      public static double pickRandomProbability()
      This utility method returns an evenly distributed randomly generated double value.
      Returns:
      The randomly selected double value.

    • pickRandomGaussian

      public static double pickRandomGaussian()
      This utility method returns a Gaussian distributed randomly generated double value.
      Returns:
      The randomly selected double value.

    • generateRandomBytes

      public static byte[] generateRandomBytes(int numberOfBytes)
      This utility method returns a byte array of the specified size containing randomly generated bytes.
      Parameters:
      numberOfBytes - The number of bytes in the desired byte array.
      Returns:
      The byte array containing random bytes.