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Class Supporting.Random 

java.lang.Object
    |
    +----Supporting.Random
public class Random
extends Object
Random number class, using a 31-bit linear congruential generator. Note that java.util contains a class Random, so watch out for name conflicts.

Constructor Index

o Random()
Construct this Random object with initial state obtained from system clock.
o Random(int)
Construct this Random object with specified initial state.

Method Index

o negExp(double)
Return an double using a negative exponential distribution, and change the internal state.
o permute(Object[])
Randomly rearrange an array.
o poisson(double)
Return an int using a Poisson distribution, and change the internal state.
o randomInt()
Return a pseudorandom int, and change the internal state.
o randomInt(int, int)
Return an int in the closed range [low,high], and change the internal state.
o randomReal()
Return a double in the open range (0,1), and change the internal state.

Constructors

o Random 
public Random()
Construct this Random object with initial state obtained from system clock.

o Random 
public Random(int initialValue)
Construct this Random object with specified initial state.

Parameters:
initialValue - the initial state.

Methods

o randomInt 
public int randomInt()
Return a pseudorandom int, and change the internal state.

Returns:
the pseudorandom int.
o randomReal 
public double randomReal()
Return a double in the open range (0,1), and change the internal state.

Returns:
the pseudorandom double.
o randomInt 
public int randomInt(int low,
                     int high)
Return an int in the closed range [low,high], and change the internal state.

Parameters:
low - the minimum value returned.
high - the maximum value returned.
Returns:
the pseudorandom int.
o poisson 
public int poisson(double expectedValue)
Return an int using a Poisson distribution, and change the internal state.

Parameters:
expectedValue - the mean of the distribution.
Returns:
the pseudorandom int.
o negExp 
public double negExp(double expectedValue)
Return an double using a negative exponential distribution, and change the internal state.

Parameters:
expectedValue - the mean of the distribution.
Returns:
the pseudorandom double.
o permute 
public static final void permute(Object[] a)
Randomly rearrange an array. The random numbers used depend on the time and day.

Parameters:
a - the array. 
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