Package it.unimi.dsi.fastutil.longs

Class LongRBTreeSet

java.lang.Object

java.util.AbstractCollection<Long>

it.unimi.dsi.fastutil.longs.AbstractLongCollection

it.unimi.dsi.fastutil.longs.AbstractLongSet

it.unimi.dsi.fastutil.longs.AbstractLongSortedSet

it.unimi.dsi.fastutil.longs.LongRBTreeSet

All Implemented Interfaces:

LongBidirectionalIterable, LongCollection, LongIterable, LongSet, LongSortedSet, Serializable, Cloneable, Iterable<Long>, Collection<Long>, SequencedCollection<Long>, SequencedSet<Long>, Set<Long>, SortedSet<Long>

public class LongRBTreeSet
extends AbstractLongSortedSet
implements Serializable, Cloneable, LongSortedSet

A type-specific red-black tree set with a fast, small-footprint implementation.

The iterators provided by this class are type-specific bidirectional iterators. Moreover, the iterator returned by iterator() can be safely cast to a type-specific list iterator.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
LongRBTreeSet()	Creates a new empty tree set.
LongRBTreeSet(long[] a)	Creates a new tree set copying the elements of an array.
LongRBTreeSet(long[] a, int offset, int length)	Creates a new tree set and fills it with the elements of a given array.
LongRBTreeSet(long[] a, int offset, int length, Comparator<? super Long> c)	Creates a new tree set and fills it with the elements of a given array using a given Comparator.
LongRBTreeSet(long[] a, Comparator<? super Long> c)	Creates a new tree set copying the elements of an array using a given Comparator.
LongRBTreeSet(LongCollection c)	Creates a new tree set copying a given type-specific collection.
LongRBTreeSet(LongIterator i)	Creates a new tree set using elements provided by a type-specific iterator.
LongRBTreeSet(LongSortedSet s)	Creates a new tree set copying a given type-specific sorted set (and its Comparator).
LongRBTreeSet(Collection<? extends Long> c)	Creates a new tree set copying a given collection.
LongRBTreeSet(Comparator<? super Long> c)	Creates a new empty tree set with the given comparator.
LongRBTreeSet(Iterator<?> i)	Creates a new tree set using elements provided by an iterator.
LongRBTreeSet(SortedSet<Long> s)	Creates a new tree set copying a given sorted set (and its Comparator).

Method Summary

Modifier and Type	Method	Description
boolean	add(long k)	Ensures that this collection contains the specified element (optional operation).
void	clear()
Object	clone()	Returns a deep copy of this tree set.
LongComparator	comparator()
boolean	contains(long k)	Returns true if this collection contains the specified element.
long	firstLong()	Returns the first (lowest) element currently in this set.
LongSortedSet	headSet(long to)	Returns a view of the portion of this sorted set whose elements are strictly less than toElement.
boolean	isEmpty()
LongBidirectionalIterator	iterator()	Returns a type-specific iterator on the elements of this collection.
LongBidirectionalIterator	iterator(long from)	Returns a type-specific BidirectionalIterator on the elements in this set, starting from a given element of the domain (optional operation).
long	lastLong()	Returns the last (highest) element currently in this set.
boolean	remove(long k)	Removes an element from this set.
int	size()
LongSortedSet	subSet(long from, long to)	Returns a view of the portion of this sorted set whose elements range from fromElement, inclusive, to toElement, exclusive.
LongSortedSet	tailSet(long from)	Returns a view of the portion of this sorted set whose elements are greater than or equal to fromElement.

Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLongSet

equals, hashCode, rem

Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLongCollection

add, addAll, addAll, contains, containsAll, containsAll, forEach, remove, removeAll, removeAll, removeIf, retainAll, retainAll, toArray, toLongArray, toLongArray, toString

Methods inherited from class java.util.AbstractCollection

toArray, toArray

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

toArray

Methods inherited from interface it.unimi.dsi.fastutil.longs.LongCollection

addAll, containsAll, longIterator, longParallelStream, longSpliterator, longStream, parallelStream, removeAll, removeIf, removeIf, removeIf, retainAll, stream, toArray, toLongArray, toLongArray

Methods inherited from interface it.unimi.dsi.fastutil.longs.LongIterable

forEach, forEach, forEach

Methods inherited from interface it.unimi.dsi.fastutil.longs.LongSet

add, contains, rem, remove

Methods inherited from interface it.unimi.dsi.fastutil.longs.LongSortedSet

first, headSet, last, spliterator, subSet, tailSet

Methods inherited from interface java.util.Set

add, addAll, contains, containsAll, equals, hashCode, remove, removeAll, retainAll, toArray, toArray

Methods inherited from interface java.util.SortedSet

addFirst, addLast, getFirst, getLast, removeFirst, removeLast, reversed

Constructor Details

LongRBTreeSet

public LongRBTreeSet()

Creates a new empty tree set.

LongRBTreeSet

public LongRBTreeSet(Comparator<? super Long> c)

Creates a new empty tree set with the given comparator.

Parameters:

c - a Comparator (even better, a type-specific comparator).

LongRBTreeSet

public LongRBTreeSet(Collection<? extends Long> c)

Creates a new tree set copying a given collection.

Parameters:

c - a collection to be copied into the new tree set.

LongRBTreeSet

public LongRBTreeSet(SortedSet<Long> s)

Creates a new tree set copying a given sorted set (and its Comparator).

Parameters:

s - a SortedSet to be copied into the new tree set.

LongRBTreeSet

public LongRBTreeSet(LongCollection c)

Creates a new tree set copying a given type-specific collection.

Parameters:

c - a type-specific collection to be copied into the new tree set.

LongRBTreeSet

public LongRBTreeSet(LongSortedSet s)

Creates a new tree set copying a given type-specific sorted set (and its Comparator).

Parameters:

s - a type-specific sorted set to be copied into the new tree set.

LongRBTreeSet

public LongRBTreeSet(LongIterator i)

Creates a new tree set using elements provided by a type-specific iterator.

Parameters:

i - a type-specific iterator whose elements will fill the set.

LongRBTreeSet

public LongRBTreeSet(Iterator<?> i)

Creates a new tree set using elements provided by an iterator.

Parameters:

i - an iterator whose elements will fill the set.

LongRBTreeSet

public LongRBTreeSet(long[] a,
 int offset,
 int length,
 Comparator<? super Long> c)

Creates a new tree set and fills it with the elements of a given array using a given Comparator.

Parameters:

a - an array whose elements will be used to fill the set.

offset - the first element to use.

length - the number of elements to use.

c - a Comparator (even better, a type-specific comparator).

LongRBTreeSet

public LongRBTreeSet(long[] a,
 int offset,
 int length)

Creates a new tree set and fills it with the elements of a given array.

Parameters:

a - an array whose elements will be used to fill the set.

offset - the first element to use.

length - the number of elements to use.

LongRBTreeSet

public LongRBTreeSet(long[] a)

Creates a new tree set copying the elements of an array.

Parameters:

a - an array to be copied into the new tree set.

LongRBTreeSet

public LongRBTreeSet(long[] a,
 Comparator<? super Long> c)

Creates a new tree set copying the elements of an array using a given Comparator.

Parameters:

a - an array to be copied into the new tree set.

c - a Comparator (even better, a type-specific comparator).

Method Details

add

public boolean add(long k)

Description copied from class: AbstractLongCollection

Ensures that this collection contains the specified element (optional operation).

Specified by:

add in interface LongCollection

Overrides:

add in class AbstractLongCollection

See Also:

• Collection.add(Object)

remove

public boolean remove(long k)

Description copied from class: AbstractLongSet

Removes an element from this set. Delegates to the type-specific rem() method implemented by type-specific abstract Collection superclass.

Specified by:

remove in interface LongSet

Overrides:

remove in class AbstractLongSet

See Also:

• Collection.remove(Object)

contains

public boolean contains(long k)

Description copied from class: AbstractLongCollection

Returns true if this collection contains the specified element.

Specified by:

contains in interface LongCollection

Overrides:

contains in class AbstractLongCollection

See Also:

• Collection.contains(Object)

clear

public void clear()

Specified by:

clear in interface Collection<Long>

Specified by:

clear in interface Set<Long>

Overrides:

clear in class AbstractCollection<Long>

size

public int size()

Specified by:

size in interface Collection<Long>

Specified by:

size in interface Set<Long>

Specified by:

size in class AbstractCollection<Long>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<Long>

Specified by:

isEmpty in interface Set<Long>

Overrides:

isEmpty in class AbstractCollection<Long>

firstLong

public long firstLong()

Description copied from interface: LongSortedSet

Returns the first (lowest) element currently in this set.

Specified by:

firstLong in interface LongSortedSet

See Also:

• SortedSet.first()

lastLong

public long lastLong()

Description copied from interface: LongSortedSet

Returns the last (highest) element currently in this set.

Specified by:

lastLong in interface LongSortedSet

See Also:

• SortedSet.last()

iterator

public LongBidirectionalIterator iterator()

Description copied from interface: LongCollection

Returns a type-specific iterator on the elements of this collection.

Specified by:

iterator in interface Collection<Long>

Specified by:

iterator in interface Iterable<Long>

Specified by:

iterator in interface LongBidirectionalIterable

Specified by:

iterator in interface LongCollection

Specified by:

iterator in interface LongIterable

Specified by:

iterator in interface LongSet

Specified by:

iterator in interface LongSortedSet

Specified by:

iterator in interface Set<Long>

Specified by:

iterator in class AbstractLongSortedSet

Returns:

a type-specific iterator on the elements of this collection.

See Also:

• Iterable.iterator()

iterator

public LongBidirectionalIterator iterator(long from)

Description copied from interface: LongSortedSet

Returns a type-specific BidirectionalIterator on the elements in this set, starting from a given element of the domain (optional operation).

This method returns a type-specific bidirectional iterator with given starting point. The starting point is any element comparable to the elements of this set (even if it does not actually belong to the set). The next element of the returned iterator is the least element of the set that is greater than the starting point (if there are no elements greater than the starting point, hasNext() will return false). The previous element of the returned iterator is the greatest element of the set that is smaller than or equal to the starting point (if there are no elements smaller than or equal to the starting point, hasPrevious() will return false).

Note that passing the last element of the set as starting point and calling previous() you can traverse the entire set in reverse order.

Specified by:

iterator in interface LongSortedSet

Parameters:

from - an element to start from.

Returns:

a bidirectional iterator on the element in this set, starting at the given element.

comparator

public LongComparator comparator()

Description copied from interface: LongSortedSet

Specified by:

comparator in interface LongSortedSet

Specified by:

comparator in interface SortedSet<Long>

headSet

public LongSortedSet headSet(long to)

Description copied from interface: LongSortedSet

Returns a view of the portion of this sorted set whose elements are strictly less than toElement.

Specified by:

headSet in interface LongSortedSet

See Also:

• SortedSet.headSet(Object)

tailSet

public LongSortedSet tailSet(long from)

Description copied from interface: LongSortedSet

Returns a view of the portion of this sorted set whose elements are greater than or equal to fromElement.

Specified by:

tailSet in interface LongSortedSet

See Also:

• SortedSet.tailSet(Object)

subSet

public LongSortedSet subSet(long from,
 long to)

Description copied from interface: LongSortedSet

Returns a view of the portion of this sorted set whose elements range from fromElement, inclusive, to toElement, exclusive.

Specified by:

subSet in interface LongSortedSet

See Also:

• SortedSet.subSet(Object,Object)

clone

public Object clone()

Returns a deep copy of this tree set.

This method performs a deep copy of this tree set; the data stored in the set, however, is not cloned. Note that this makes a difference only for object keys.

Returns:

a deep copy of this tree set.