Package jebl.math

Class Random

  • public class Random
extends java.lang.Object
    Random number generation.
    Version:
    $Id: Random.java 370 2006-06-29 18:57:56Z rambaut $
    Author:
    Matthew Goode, Alexei Drummond

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static double[] getNormalized​(double[] array)  
      static double getTotal​(double[] array)  
      static double getTotal​(double[] array, int start, int end)  
      static boolean nextBoolean()
      Access a default instance of this class, access is synchronized
      static byte nextByte()
      Access a default instance of this class, access is synchronized
      static void nextBytes​(byte[] bs)
      Access a default instance of this class, access is synchronized
      static char nextChar()
      Access a default instance of this class, access is synchronized
      static double nextDouble()
      Access a default instance of this class, access is synchronized
      static float nextFloat()
      Access a default instance of this class, access is synchronized
      static double nextGaussian()
      Access a default instance of this class, access is synchronized
      static int nextInt()
      Access a default instance of this class, access is synchronized
      static int nextInt​(int n)
      Access a default instance of this class, access is synchronized
      static long nextLong()
      Access a default instance of this class, access is synchronized
      static short nextShort()
      Access a default instance of this class, access is synchronized
      static int randomChoice​(double[] cf)  
      static void setSeed​(long seed)
      Access a default instance of this class, access is synchronized
      static void shuffle​(int[] array)
      Shuffles an array.
      static void shuffle​(int[] array, int numberOfShuffles)
      Shuffles an array.
      static int[] shuffled​(int l)
      Returns an array of shuffled indices of length l.

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • randomChoice

        public static int randomChoice​(double[] cf)

      • getNormalized

        public static double[] getNormalized​(double[] array)
        Returns:
        a new double array where all the values sum to 1. Relative ratios are preserved.

      • getTotal

        public static double getTotal​(double[] array,
                              int start,
                              int end)
        Parameters:
        end - the index of the element after the last one to be included
        Returns:
        the total of a the values in a range of an array

      • getTotal

        public static double getTotal​(double[] array)
        Returns:
        the total of the values in an array

      • setSeed

        public static void setSeed​(long seed)
        Access a default instance of this class, access is synchronized

      • nextByte

        public static byte nextByte()
        Access a default instance of this class, access is synchronized

      • nextBoolean

        public static boolean nextBoolean()
        Access a default instance of this class, access is synchronized

      • nextBytes

        public static void nextBytes​(byte[] bs)
        Access a default instance of this class, access is synchronized

      • nextChar

        public static char nextChar()
        Access a default instance of this class, access is synchronized

      • nextGaussian

        public static double nextGaussian()
        Access a default instance of this class, access is synchronized

      • nextDouble

        public static double nextDouble()
        Access a default instance of this class, access is synchronized

      • nextFloat

        public static float nextFloat()
        Access a default instance of this class, access is synchronized

      • nextLong

        public static long nextLong()
        Access a default instance of this class, access is synchronized

      • nextShort

        public static short nextShort()
        Access a default instance of this class, access is synchronized

      • nextInt

        public static int nextInt()
        Access a default instance of this class, access is synchronized

      • nextInt

        public static int nextInt​(int n)
        Access a default instance of this class, access is synchronized

      • shuffle

        public static void shuffle​(int[] array)
        Shuffles an array.

      • shuffle

        public static void shuffle​(int[] array,
                           int numberOfShuffles)
        Shuffles an array. Shuffles numberOfShuffles times

      • shuffled

        public static int[] shuffled​(int l)
        Returns an array of shuffled indices of length l.
        Parameters:
        l - length of the array required.