Class RandomSeedGenerator
- java.lang.Object
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- cern.colt.PersistentObject
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- cern.jet.random.engine.RandomSeedGenerator
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Cloneable
public class RandomSeedGenerator extends PersistentObject
Deterministic seed generator for pseudo-random number generators. The sole purpose of this class is to decorrelate seeds and uniform random number generators. (If a generator would be used to generate seeds for itself, the result could be correlations.)This class has entirelly deterministic behaviour: Constructing two instances with the same parameters at any two distinct points in time will produce identical seed sequences. However, it does not (at all) generate uniformly distributed numbers. Do not use it as a uniformly distributed random number generator!
Each generated sequence of seeds has a period of 109 numbers. Internally uses
RandomSeedTable
.- Version:
- 1.0, 09/24/99
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected int
column
protected int
row
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Fields inherited from class cern.colt.PersistentObject
serialVersionUID
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Constructor Summary
Constructors Constructor Description RandomSeedGenerator()
Constructs and returns a new seed generator.RandomSeedGenerator(int row, int column)
Constructs and returns a new seed generator; you normally won't need to use this method.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static void
main(java.lang.String[] args)
Prints the generated seeds for the given input parameters.int
nextSeed()
Returns the next seed.void
print(int size)
Prints the next size generated seeds.-
Methods inherited from class cern.colt.PersistentObject
clone
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Constructor Detail
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RandomSeedGenerator
public RandomSeedGenerator()
Constructs and returns a new seed generator.
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RandomSeedGenerator
public RandomSeedGenerator(int row, int column)
Constructs and returns a new seed generator; you normally won't need to use this method.The position [row,column] indicates the iteration starting point within a (virtual) seed matrix. The seed matrix is a n*m matrix with 1 + Integer.MAX_VALUE (virtual) rows and RandomSeedTable.COLUMNS columns. Successive calls to method nextSeed() will cycle over the given column, in ascending order: nextSeed() returns the seed s[row,column], s[row+1,column], ... s[Integer.MAX_VALUE,column], s[0,column], s[1,column], ...
- Parameters:
row
- should be in [0,Integer.MAX_VALUE].column
- should be in [0,RandomSeedTable.COLUMNS - 1].
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