public class LongArraySet extends AbstractLongSet implements java.io.Serializable, java.lang.Cloneable
The main purpose of this implementation is that of wrapping cleanly the brute-force approach to the storage of a very small number of items: just put them into an array and scan linearly to find an item.
Constructor and Description |
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LongArraySet()
Creates a new empty array set.
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LongArraySet(java.util.Collection<? extends java.lang.Long> c)
Creates a new array set copying the contents of a given set.
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LongArraySet(int capacity)
Creates a new empty array set of given initial capacity.
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LongArraySet(long[] a)
Creates a new array set using the given backing array.
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LongArraySet(long[] a,
int size)
Creates a new array set using the given backing array and the given number of elements of the array.
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LongArraySet(LongCollection c)
Creates a new array set copying the contents of a given collection.
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Modifier and Type | Method and Description |
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boolean |
add(long k) |
void |
clear() |
LongArraySet |
clone()
Returns a deep copy of this set.
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boolean |
contains(long k) |
boolean |
isEmpty() |
LongIterator |
iterator()
Returns a type-specific iterator on the elements of this collection.
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boolean |
remove(long k)
Removes an element from this set.
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int |
size() |
equals, hashCode, rem, remove
add, addAll, addAll, contains, containsAll, containsAll, longIterator, rem, removeAll, removeAll, retainAll, retainAll, toArray, toArray, toArray, toLongArray, toLongArray, toString
addAll, containsAll, longIterator, removeAll, retainAll, toArray, toArray, toLongArray, toLongArray
public LongArraySet(long[] a)
It is responsibility of the caller that the elements of a
are distinct.
a
- the backing array.public LongArraySet()
public LongArraySet(int capacity)
capacity
- the initial capacity.public LongArraySet(LongCollection c)
c
- a collection.public LongArraySet(java.util.Collection<? extends java.lang.Long> c)
c
- a collection.public LongArraySet(long[] a, int size)
It is responsibility of the caller that the first size
elements of a
are distinct.
a
- the backing array.size
- the number of valid elements in a
.public LongIterator iterator()
LongCollection
Note that this specification strengthens the one given in
Iterable.iterator()
, which was already
strengthened in the corresponding type-specific class,
but was weakened by the fact that this interface extends Collection
.
iterator
in interface LongCollection
iterator
in interface LongIterable
iterator
in interface LongSet
iterator
in interface java.lang.Iterable<java.lang.Long>
iterator
in interface java.util.Collection<java.lang.Long>
iterator
in interface java.util.Set<java.lang.Long>
iterator
in class AbstractLongSet
public boolean contains(long k)
contains
in interface LongCollection
contains
in class AbstractLongCollection
Collection.contains(Object)
public int size()
size
in interface java.util.Collection<java.lang.Long>
size
in interface java.util.Set<java.lang.Long>
size
in class java.util.AbstractCollection<java.lang.Long>
public boolean remove(long k)
LongSet
Note that the corresponding method of the type-specific collection is rem()
.
This unfortunate situation is caused by the clash
with the similarly named index-based method in the List
interface.
remove
in interface LongSet
remove
in class AbstractLongSet
Collection.remove(Object)
public boolean add(long k)
add
in interface LongCollection
add
in class AbstractLongCollection
Collection.add(Object)
public void clear()
clear
in interface java.util.Collection<java.lang.Long>
clear
in interface java.util.Set<java.lang.Long>
clear
in class java.util.AbstractCollection<java.lang.Long>
public boolean isEmpty()
isEmpty
in interface java.util.Collection<java.lang.Long>
isEmpty
in interface java.util.Set<java.lang.Long>
isEmpty
in class AbstractLongCollection
public LongArraySet clone()
This method performs a deep copy of this hash set; the data stored in the set, however, is not cloned. Note that this makes a difference only for object keys.
clone
in class java.lang.Object