net.sourceforge.domian.test.combinatorics
Class Permutation

java.lang.Object
  net.sourceforge.domian.test.combinatorics.Sequence
      net.sourceforge.domian.test.combinatorics.Permutation

All Implemented Interfaces:

java.util.Iterator<int[]>

public class Permutation
extends Sequence

This class generates a list with number permutations according to a given length, n, and number of elements, m. The permuation list are zero-based.

The permutations of n elements chosen from a list of m elements, are the possible arrangements where each element only can appear once and the ordering of elements is taken into consideration.

no: "Urnemodell - Ordnet utvalg uten tilbakelegging"

Med "ordnet" menes det at rekkefølgen som elementene er ordnet etter tas hensyn til.
Med "uten tilbakelegging" menes det at ingen elementer kan forekomme mer enn én gang.

Author:

Eirik Torske

Field Summary

private long

P

Fields inherited from class net.sourceforge.domian.test.combinatorics.Sequence

m, n, sequence, sequenceNumber

Constructor Summary

Permutation(int n)

Permutation(int m, int n)

Method Summary

protected void	calculateTotalNumberOfSequences()
boolean	hasNext()
protected boolean	sequenceConstraintOk() Permutation constraint: No numbers in the number sequence can be similar.

Methods inherited from class net.sourceforge.domian.test.combinatorics.Sequence

next, remove, reset

Methods inherited from class java.lang.Object

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

Field Detail

P

private long P

Constructor Detail

Permutation

public Permutation(int n)

Permutation

public Permutation(int m,
                   int n)

Method Detail

calculateTotalNumberOfSequences

protected void calculateTotalNumberOfSequences()

Overrides:

calculateTotalNumberOfSequences in class Sequence

sequenceConstraintOk

protected boolean sequenceConstraintOk()

Permutation constraint: No numbers in the number sequence can be similar.

Overrides:

sequenceConstraintOk in class Sequence

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<int[]>

Overrides:

hasNext in class Sequence