Package edu.wisc.game.util

Class RandomRG

java.lang.Object

java.util.Random

edu.wisc.game.util.RandomRG

All Implemented Interfaces:

Serializable

public class RandomRG
extends Random

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
RandomRG()
RandomRG(long seed)

Method Summary

Modifier and Type	Method	Description
boolean	getBoolean(double p)
<T extends Enum<T>> T	getEnum(Class<T> retType)	Get a random value of a specified enum class
int	getExp(int M, double L)
double	getExpDouble(double M, double L)	Returns an exponentially distributed random real number in the range [0, M], with the probability density dropping by e at L.
int	getInRange(int[] z)
int	getInRange(int min, int max)	Generates a random integer number x, uniformly distributed among the (max-min+1) values: min ≤ x ≤ max.
Vector<Integer>	randomSubsetOrdered(int n, int m)	A random subset of m numbers out of [0:n-1], in ascending order
Vector<Integer>	randomSubsetPermuted(int n, int m)	A random subset of m numbers out of [0:n-1], in random order
Vector<Integer>	randomVector(int n, int m)	A random "bag" of m numbers, each one independently drawn out of [0:n-1]

Methods inherited from class java.util.Random

doubles, doubles, doubles, doubles, ints, ints, ints, ints, longs, longs, longs, longs, next, nextBoolean, nextBytes, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong, setSeed

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomRG

public RandomRG()

RandomRG

public RandomRG(long seed)

Method Detail

getBoolean

public boolean getBoolean(double p)

Parameters:

p - The probability of the return value being true

Returns:

a random boolean number.

getInRange

public int getInRange(int min,
                      int max)

Generates a random integer number x, uniformly distributed among the (max-min+1) values: min ≤ x ≤ max.

getInRange

public int getInRange(int[] z)

randomVector

public Vector<Integer> randomVector(int n,
                                    int m)

A random "bag" of m numbers, each one independently drawn out of [0:n-1]

randomSubsetPermuted

public Vector<Integer> randomSubsetPermuted(int n,
                                            int m)

A random subset of m numbers out of [0:n-1], in random order

randomSubsetOrdered

public Vector<Integer> randomSubsetOrdered(int n,
                                           int m)

A random subset of m numbers out of [0:n-1], in ascending order

getExpDouble

public double getExpDouble(double M,
                           double L)

Returns an exponentially distributed random real number in the range [0, M], with the probability density dropping by e at L.

getExp

public int getExp(int M,
                  double L)

getEnum

public <T extends Enum<T>> T getEnum(Class<T> retType)

Get a random value of a specified enum class