net.sf.rubycollect4j.iter

Class PermutationIterator<E>

java.lang.Object

net.sf.rubycollect4j.iter.PermutationIterator<E>

Type Parameters:

E - the type of the elements

All Implemented Interfaces:

java.util.Iterator<RubyArray<E>>

public final class PermutationIterator<E>
extends java.lang.Object
implements java.util.Iterator<RubyArray<E>>

PermutationIterator generates all permutations into a List with length n.

Constructor Summary

Constructors

Constructor and Description
PermutationIterator(java.util.List<? extends E> list, int n) Creates a PermutationIterator.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	hasNext()
RubyArray<E>	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

PermutationIterator

public PermutationIterator(java.util.List<? extends E> list,
                   int n)

Creates a PermutationIterator.

Parameters:

list - a List

n - length of each permutation

Throws:

java.lang.NullPointerException - if list is null

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<RubyArray<E>>

next

public RubyArray<E> next()

Specified by:

next in interface java.util.Iterator<RubyArray<E>>

remove

public void remove()

Specified by:

remove in interface java.util.Iterator<RubyArray<E>>