fj.test

Class Rand

java.lang.Object

fj.test.Rand

public final class Rand
extends java.lang.Object

A random number generator.

Field Summary

Fields

Modifier and Type	Field and Description
static Rand	standard A standard random generator that uses Random.

Method Summary

Modifier and Type	Method and Description
double	choose(double from, double to) Randomly chooses a value between the given range (inclusive).
int	choose(int from, int to) Randomly chooses a value between the given range (inclusive).
double	choose(long seed, double from, double to) Randomly chooses a value between the given range (inclusive).
int	choose(long seed, int from, int to) Randomly chooses a value between the given range (inclusive).
static Rand	rand(fj.F<fj.data.Option<java.lang.Long>,fj.F<java.lang.Integer,fj.F<java.lang.Integer,java.lang.Integer>>> f, fj.F<fj.data.Option<java.lang.Long>,fj.F<java.lang.Double,fj.F<java.lang.Double,java.lang.Double>>> g) Deprecated. As of release 4.6, use rand(F, F, F).
static Rand	rand(fj.F<fj.data.Option<java.lang.Long>,fj.F<java.lang.Integer,fj.F<java.lang.Integer,java.lang.Integer>>> f, fj.F<fj.data.Option<java.lang.Long>,fj.F<java.lang.Double,fj.F<java.lang.Double,java.lang.Double>>> g, fj.F<java.lang.Long,Rand> onReseed) Constructs a reseedable random generator from the given functions that supply a range to produce a result.
Rand	reseed(long seed) Gives this random generator a new seed.

Methods inherited from class java.lang.Object

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

Field Detail

standard

public static final Rand standard

A standard random generator that uses Random.

Method Detail

choose

public int choose(long seed,
                  int from,
                  int to)

Randomly chooses a value between the given range (inclusive).

Parameters:

seed - The seed to use for random generation.

from - The minimum value to choose.

to - The maximum value to choose.

Returns:

A random value in the given range.

choose

public int choose(int from,
                  int to)

Randomly chooses a value between the given range (inclusive).

Parameters:

from - The minimum value to choose.

to - The maximum value to choose.

Returns:

A random value in the given range.

choose

public double choose(long seed,
                     double from,
                     double to)

Randomly chooses a value between the given range (inclusive).

Parameters:

seed - The seed to use for random generation.

from - The minimum value to choose.

to - The maximum value to choose.

Returns:

A random value in the given range.

choose

public double choose(double from,
                     double to)

Randomly chooses a value between the given range (inclusive).

Parameters:

from - The minimum value to choose.

to - The maximum value to choose.

Returns:

A random value in the given range.

reseed

public Rand reseed(long seed)

Gives this random generator a new seed.

Parameters:

seed - The seed of the new random generator.

Returns:

A random generator with the given seed.

rand

@Deprecated
public static Rand rand(fj.F<fj.data.Option<java.lang.Long>,fj.F<java.lang.Integer,fj.F<java.lang.Integer,java.lang.Integer>>> f,
                                     fj.F<fj.data.Option<java.lang.Long>,fj.F<java.lang.Double,fj.F<java.lang.Double,java.lang.Double>>> g)

Deprecated. As of release 4.6, use rand(F, F, F).

Constructs a random generator from the given functions that supply a range to produce a result.

Calling reseed(long) on an instance returned from this method will result in an exception being thrown.

Parameters:

f - The integer random generator.

g - The floating-point random generator.

Returns:

A random generator from the given functions that supply a range to produce a result.

rand

public static Rand rand(fj.F<fj.data.Option<java.lang.Long>,fj.F<java.lang.Integer,fj.F<java.lang.Integer,java.lang.Integer>>> f,
                        fj.F<fj.data.Option<java.lang.Long>,fj.F<java.lang.Double,fj.F<java.lang.Double,java.lang.Double>>> g,
                        fj.F<java.lang.Long,Rand> onReseed)

Constructs a reseedable random generator from the given functions that supply a range to produce a result.

Parameters:

f - The integer random generator.

g - The floating-point random generator.

onReseed - Function to create a reseeded Rand.

Returns:

A random generator from the given functions that supply a range to produce a result.