it.unimi.dsi.fastutil

Interface BidirectionalIterator<K>

All Superinterfaces:

Iterator<K>

All Known Subinterfaces:

BigListIterator<K>, BooleanBidirectionalIterator, BooleanBigListIterator, BooleanListIterator, ByteBidirectionalIterator, ByteBigListIterator, ByteListIterator, CharBidirectionalIterator, CharBigListIterator, CharListIterator, DoubleBidirectionalIterator, DoubleBigListIterator, DoubleListIterator, FloatBidirectionalIterator, FloatBigListIterator, FloatListIterator, IntBidirectionalIterator, IntBigListIterator, IntListIterator, LongBidirectionalIterator, LongBigListIterator, LongListIterator, ObjectBidirectionalIterator<K>, ObjectBigListIterator<K>, ObjectListIterator<K>, ShortBidirectionalIterator, ShortBigListIterator, ShortListIterator

All Known Implementing Classes:

AbstractBooleanBidirectionalIterator, AbstractBooleanBigListIterator, AbstractBooleanListIterator, AbstractByteBidirectionalIterator, AbstractByteBigListIterator, AbstractByteListIterator, AbstractCharBidirectionalIterator, AbstractCharBigListIterator, AbstractCharListIterator, AbstractDoubleBidirectionalIterator, AbstractDoubleBigListIterator, AbstractDoubleListIterator, AbstractFloatBidirectionalIterator, AbstractFloatBigListIterator, AbstractFloatListIterator, AbstractIntBidirectionalIterator, AbstractIntBigListIterator, AbstractIntListIterator, AbstractLongBidirectionalIterator, AbstractLongBigListIterator, AbstractLongListIterator, AbstractObjectBidirectionalIterator, AbstractObjectBigListIterator, AbstractObjectListIterator, AbstractShortBidirectionalIterator, AbstractShortBigListIterator, AbstractShortListIterator, BooleanBigListIterators.BigListIteratorListIterator, BooleanBigListIterators.EmptyBigListIterator, BooleanBigListIterators.UnmodifiableBigListIterator, BooleanIterators.EmptyIterator, BooleanIterators.UnmodifiableBidirectionalIterator, BooleanIterators.UnmodifiableListIterator, ByteBigListIterators.BigListIteratorListIterator, ByteBigListIterators.EmptyBigListIterator, ByteBigListIterators.UnmodifiableBigListIterator, ByteIterators.EmptyIterator, ByteIterators.UnmodifiableBidirectionalIterator, ByteIterators.UnmodifiableListIterator, CharBigListIterators.BigListIteratorListIterator, CharBigListIterators.EmptyBigListIterator, CharBigListIterators.UnmodifiableBigListIterator, CharIterators.EmptyIterator, CharIterators.UnmodifiableBidirectionalIterator, CharIterators.UnmodifiableListIterator, DoubleBigListIterators.BigListIteratorListIterator, DoubleBigListIterators.EmptyBigListIterator, DoubleBigListIterators.UnmodifiableBigListIterator, DoubleIterators.EmptyIterator, DoubleIterators.UnmodifiableBidirectionalIterator, DoubleIterators.UnmodifiableListIterator, FloatBigListIterators.BigListIteratorListIterator, FloatBigListIterators.EmptyBigListIterator, FloatBigListIterators.UnmodifiableBigListIterator, FloatIterators.EmptyIterator, FloatIterators.UnmodifiableBidirectionalIterator, FloatIterators.UnmodifiableListIterator, IntBigListIterators.BigListIteratorListIterator, IntBigListIterators.EmptyBigListIterator, IntBigListIterators.UnmodifiableBigListIterator, IntIterators.EmptyIterator, IntIterators.UnmodifiableBidirectionalIterator, IntIterators.UnmodifiableListIterator, LongBigListIterators.BigListIteratorListIterator, LongBigListIterators.EmptyBigListIterator, LongBigListIterators.UnmodifiableBigListIterator, LongIterators.EmptyIterator, LongIterators.UnmodifiableBidirectionalIterator, LongIterators.UnmodifiableListIterator, ObjectBigListIterators.BigListIteratorListIterator, ObjectBigListIterators.EmptyBigListIterator, ObjectBigListIterators.UnmodifiableBigListIterator, ObjectIterators.EmptyIterator, ObjectIterators.UnmodifiableBidirectionalIterator, ObjectIterators.UnmodifiableListIterator, ShortBigListIterators.BigListIteratorListIterator, ShortBigListIterators.EmptyBigListIterator, ShortBigListIterators.UnmodifiableBigListIterator, ShortIterators.EmptyIterator, ShortIterators.UnmodifiableBidirectionalIterator, ShortIterators.UnmodifiableListIterator

public interface BidirectionalIterator<K>
extends Iterator<K>

A bidirectional Iterator.

This kind of iterator is essentially a ListIterator that does not support ListIterator.previousIndex() and ListIterator.nextIndex(). It is useful for those maps that can easily provide bidirectional iteration, but provide no index.

Note that iterators returned by fastutil classes are more specific, and support skipping. This class serves the purpose of organising in a cleaner way the relationships between various iterators.

See Also:

Iterator, ListIterator

Method Summary

Methods

Modifier and Type	Method and Description
boolean	hasPrevious() Returns whether there is a previous element.
K	previous() Returns the previous element from the collection.

Methods inherited from interface java.util.Iterator

hasNext, next, remove

Method Detail

previous

K previous()

Returns the previous element from the collection.

Returns:

the previous element from the collection.

See Also:

ListIterator.previous()

hasPrevious

boolean hasPrevious()

Returns whether there is a previous element.

Returns:

whether there is a previous element.

See Also:

ListIterator.hasPrevious()