Class CharArraySet
- java.lang.Object
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- java.util.AbstractCollection<java.lang.Character>
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- it.unimi.dsi.fastutil.chars.AbstractCharCollection
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- it.unimi.dsi.fastutil.chars.AbstractCharSet
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- it.unimi.dsi.fastutil.chars.CharArraySet
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- All Implemented Interfaces:
CharCollection
,CharIterable
,CharSet
,java.io.Serializable
,java.lang.Cloneable
,java.lang.Iterable<java.lang.Character>
,java.util.Collection<java.lang.Character>
,java.util.Set<java.lang.Character>
public class CharArraySet extends AbstractCharSet implements java.io.Serializable, java.lang.Cloneable
A simple, brute-force implementation of a set based on a backing array.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.
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description CharArraySet()
Creates a new empty array set.CharArraySet(char[] a)
Creates a new array set using the given backing array.CharArraySet(char[] a, int size)
Creates a new array set using the given backing array and the given number of elements of the array.CharArraySet(int capacity)
Creates a new empty array set of given initial capacity.CharArraySet(CharCollection c)
Creates a new array set copying the contents of a given collection.CharArraySet(CharSet c)
Creates a new array set copying the contents of a given collection.CharArraySet(java.util.Collection<? extends java.lang.Character> c)
Creates a new array set copying the contents of a given set.CharArraySet(java.util.Set<? extends java.lang.Character> c)
Creates a new array set copying the contents of a given set.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
add(char k)
Ensures that this collection contains the specified element (optional operation).void
clear()
CharArraySet
clone()
Returns a deep copy of this set.boolean
contains(char k)
Returnstrue
if this collection contains the specified element.boolean
isEmpty()
CharIterator
iterator()
Returns a type-specific iterator on the elements of this collection.boolean
remove(char k)
Removes an element from this set.int
size()
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Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharSet
equals, hashCode, rem
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Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharCollection
add, addAll, contains, containsAll, remove, removeAll, retainAll, toArray, toCharArray, toCharArray, toString
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Methods inherited from class java.util.AbstractCollection
addAll, containsAll, removeAll, retainAll, toArray, toArray
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Methods inherited from interface it.unimi.dsi.fastutil.chars.CharCollection
addAll, containsAll, removeAll, removeIf, removeIf, retainAll, toArray, toCharArray, toCharArray
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Methods inherited from interface it.unimi.dsi.fastutil.chars.CharIterable
forEach, forEach
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Constructor Detail
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CharArraySet
public CharArraySet(char[] a)
Creates a new array set using the given backing array. The resulting set will have as many elements as the array.It is responsibility of the caller that the elements of
a
are distinct.- Parameters:
a
- the backing array.
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CharArraySet
public CharArraySet()
Creates a new empty array set.
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CharArraySet
public CharArraySet(int capacity)
Creates a new empty array set of given initial capacity.- Parameters:
capacity
- the initial capacity.
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CharArraySet
public CharArraySet(CharCollection c)
Creates a new array set copying the contents of a given collection.- Parameters:
c
- a collection.
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CharArraySet
public CharArraySet(java.util.Collection<? extends java.lang.Character> c)
Creates a new array set copying the contents of a given set.- Parameters:
c
- a collection.
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CharArraySet
public CharArraySet(CharSet c)
Creates a new array set copying the contents of a given collection.- Parameters:
c
- a collection.
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CharArraySet
public CharArraySet(java.util.Set<? extends java.lang.Character> c)
Creates a new array set copying the contents of a given set.- Parameters:
c
- a collection.
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CharArraySet
public CharArraySet(char[] a, int size)
Creates a new array set using the given backing array and the given number of elements of the array.It is responsibility of the caller that the first
size
elements ofa
are distinct.- Parameters:
a
- the backing array.size
- the number of valid elements ina
.
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Method Detail
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iterator
public CharIterator iterator()
Description copied from interface:CharCollection
Returns a type-specific iterator on the elements of this collection.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 extendsCollection
.- Specified by:
iterator
in interfaceCharCollection
- Specified by:
iterator
in interfaceCharIterable
- Specified by:
iterator
in interfaceCharSet
- Specified by:
iterator
in interfacejava.util.Collection<java.lang.Character>
- Specified by:
iterator
in interfacejava.lang.Iterable<java.lang.Character>
- Specified by:
iterator
in interfacejava.util.Set<java.lang.Character>
- Specified by:
iterator
in classAbstractCharSet
- Returns:
- a type-specific iterator on the elements of this collection.
- See Also:
Iterable.iterator()
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contains
public boolean contains(char k)
Description copied from class:AbstractCharCollection
Returnstrue
if this collection contains the specified element.This implementation iterates over the elements in the collection, looking for the specified element.
- Specified by:
contains
in interfaceCharCollection
- Overrides:
contains
in classAbstractCharCollection
- See Also:
Collection.contains(Object)
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size
public int size()
- Specified by:
size
in interfacejava.util.Collection<java.lang.Character>
- Specified by:
size
in interfacejava.util.Set<java.lang.Character>
- Specified by:
size
in classjava.util.AbstractCollection<java.lang.Character>
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remove
public boolean remove(char k)
Description copied from class:AbstractCharSet
Removes an element from this set.Note that the corresponding method of a type-specific collection is
rem()
. This unfortunate situation is caused by the clash with the similarly named index-based method in theList
interface. Delegates to the type-specificrem()
method implemented by type-specific abstractCollection
superclass.- Specified by:
remove
in interfaceCharSet
- Overrides:
remove
in classAbstractCharSet
- See Also:
Collection.remove(Object)
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add
public boolean add(char k)
Description copied from class:AbstractCharCollection
Ensures that this collection contains the specified element (optional operation).This implementation always throws an
UnsupportedOperationException
.- Specified by:
add
in interfaceCharCollection
- Overrides:
add
in classAbstractCharCollection
- See Also:
Collection.add(Object)
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clear
public void clear()
- Specified by:
clear
in interfacejava.util.Collection<java.lang.Character>
- Specified by:
clear
in interfacejava.util.Set<java.lang.Character>
- Overrides:
clear
in classjava.util.AbstractCollection<java.lang.Character>
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isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interfacejava.util.Collection<java.lang.Character>
- Specified by:
isEmpty
in interfacejava.util.Set<java.lang.Character>
- Overrides:
isEmpty
in classjava.util.AbstractCollection<java.lang.Character>
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clone
public CharArraySet clone()
Returns a deep copy of this set.This method performs a deep copy of this array 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 set.
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