CharOpenCustomHashSet (fastutil 8.1.0)

java.lang.Object
- java.util.AbstractCollection<Character>
- - it.unimi.dsi.fastutil.chars.AbstractCharCollection
  - - it.unimi.dsi.fastutil.chars.AbstractCharSet
    - - it.unimi.dsi.fastutil.chars.CharOpenCustomHashSet

All Implemented Interfaces:

CharCollection, CharIterable, CharSet, Hash, Serializable, Cloneable, Iterable<Character>, Collection<Character>, Set<Character>
```
public class CharOpenCustomHashSet
extends AbstractCharSet
implements Serializable, Cloneable, Hash
```
A type-specific hash set with a fast, small-footprint implementation whose hashing strategy is specified at creation time.
Instances of this class use a hash table to represent a set. The table is filled up to a specified load factor, and then doubled in size to accommodate new entries. If the table is emptied below one fourth of the load factor, it is halved in size; however, the table is never reduced to a size smaller than that at creation time: this approach makes it possible to create sets with a large capacity in which insertions and deletions do not cause immediately rehashing. Moreover, halving is not performed when deleting entries from an iterator, as it would interfere with the iteration process.
Note that clear() does not modify the hash table size. Rather, a family of trimming methods lets you control the size of the table; this is particularly useful if you reuse instances of this class.

See Also:

Hash, HashCommon, Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.Hash
  Hash.Strategy<K>

Field Summary
- Fields inherited from interface it.unimi.dsi.fastutil.Hash
  DEFAULT_GROWTH_FACTOR, DEFAULT_INITIAL_SIZE, DEFAULT_LOAD_FACTOR, FAST_LOAD_FACTOR, FREE, OCCUPIED, PRIMES, REMOVED, VERY_FAST_LOAD_FACTOR

Constructor Summary

Constructors
Constructor and Description
`CharOpenCustomHashSet(char[] a, CharHash.Strategy strategy)` Creates a new hash set with `Hash.DEFAULT_LOAD_FACTOR` as load factor copying the elements of an array.
`CharOpenCustomHashSet(char[] a, float f, CharHash.Strategy strategy)` Creates a new hash set copying the elements of an array.
`CharOpenCustomHashSet(char[] a, int offset, int length, CharHash.Strategy strategy)` Creates a new hash set with `Hash.DEFAULT_LOAD_FACTOR` as load factor and fills it with the elements of a given array.
`CharOpenCustomHashSet(char[] a, int offset, int length, float f, CharHash.Strategy strategy)` Creates a new hash set and fills it with the elements of a given array.
`CharOpenCustomHashSet(CharCollection c, CharHash.Strategy strategy)` Creates a new hash set with `Hash.DEFAULT_LOAD_FACTOR` as load factor copying a given type-specific collection.
`CharOpenCustomHashSet(CharCollection c, float f, CharHash.Strategy strategy)` Creates a new hash set copying a given type-specific collection.
`CharOpenCustomHashSet(CharHash.Strategy strategy)` Creates a new hash set with initial expected `Hash.DEFAULT_INITIAL_SIZE` elements and `Hash.DEFAULT_LOAD_FACTOR` as load factor.
`CharOpenCustomHashSet(CharIterator i, CharHash.Strategy strategy)` Creates a new hash set with `Hash.DEFAULT_LOAD_FACTOR` as load factor using elements provided by a type-specific iterator.
`CharOpenCustomHashSet(CharIterator i, float f, CharHash.Strategy strategy)` Creates a new hash set using elements provided by a type-specific iterator.
`CharOpenCustomHashSet(Collection<? extends Character> c, CharHash.Strategy strategy)` Creates a new hash set with `Hash.DEFAULT_LOAD_FACTOR` as load factor copying a given collection.
`CharOpenCustomHashSet(Collection<? extends Character> c, float f, CharHash.Strategy strategy)` Creates a new hash set copying a given collection.
`CharOpenCustomHashSet(int expected, CharHash.Strategy strategy)` Creates a new hash set with `Hash.DEFAULT_LOAD_FACTOR` as load factor.
`CharOpenCustomHashSet(int expected, float f, CharHash.Strategy strategy)` Creates a new hash set.
`CharOpenCustomHashSet(Iterator<?> i, CharHash.Strategy strategy)` Creates a new hash set with `Hash.DEFAULT_LOAD_FACTOR` as load factor using elements provided by an iterator.
`CharOpenCustomHashSet(Iterator<?> i, float f, CharHash.Strategy strategy)` Creates a new hash set using elements provided by an iterator.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`add(char k)` Ensures that this collection contains the specified element (optional operation).
`boolean`	`addAll(CharCollection c)` Adds all elements of the given type-specific collection to this collection.
`boolean`	`addAll(Collection<? extends Character> c)` Adds all of the elements in the specified collection to this collection (optional operation).
`void`	`clear()` Removes all of the elements from this collection (optional operation).
`CharOpenCustomHashSet`	`clone()` Returns a deep copy of this set.
`boolean`	`contains(char k)` Returns `true` if this collection contains the specified element.
`int`	`hashCode()` Returns a hash code for this set.
`boolean`	`isEmpty()` Returns `true` if this collection contains no elements.
`CharIterator`	`iterator()` Returns an iterator over the elements contained in this collection.
`boolean`	`remove(char k)` Removes an element from this set.
`int`	`size()` Returns the number of elements in this collection.
`CharHash.Strategy`	`strategy()` Returns the hashing strategy.
`boolean`	`trim()` Rehashes this set, making the table as small as possible.
`boolean`	`trim(int n)` Rehashes this set if the table is too large.

Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharSet
equals, rem

Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharCollection
add, contains, containsAll, remove, removeAll, retainAll, toArray, toCharArray, toCharArray, toString

Methods inherited from class java.util.AbstractCollection
containsAll, removeAll, retainAll, toArray, toArray

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.chars.CharSet
add, contains, remove

Methods inherited from interface it.unimi.dsi.fastutil.chars.CharCollection
containsAll, removeAll, retainAll, toArray, toCharArray, toCharArray

Methods inherited from interface it.unimi.dsi.fastutil.chars.CharIterable
forEach, forEach

Methods inherited from interface java.util.Set
containsAll, removeAll, retainAll, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection
parallelStream, removeIf, stream

- Constructor Detail
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(int expected,
                             float f,
                             CharHash.Strategy strategy)
```
    Creates a new hash set.
    The actual table size will be the least power of two greater than expected/f.
    
    Parameters:
    
    expected - the expected number of elements in the hash set.
    
    f - the load factor.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(int expected,
                             CharHash.Strategy strategy)
```
    Creates a new hash set with Hash.DEFAULT_LOAD_FACTOR as load factor.
    
    Parameters:
    
    expected - the expected number of elements in the hash set.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(CharHash.Strategy strategy)
```
    Creates a new hash set with initial expected Hash.DEFAULT_INITIAL_SIZE elements and Hash.DEFAULT_LOAD_FACTOR as load factor.
    
    Parameters:
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(Collection<? extends Character> c,
                             float f,
                             CharHash.Strategy strategy)
```
    Creates a new hash set copying a given collection.
    
    Parameters:
    
    c - a Collection to be copied into the new hash set.
    
    f - the load factor.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(Collection<? extends Character> c,
                             CharHash.Strategy strategy)
```
    Creates a new hash set with Hash.DEFAULT_LOAD_FACTOR as load factor copying a given collection.
    
    Parameters:
    
    c - a Collection to be copied into the new hash set.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(CharCollection c,
                             float f,
                             CharHash.Strategy strategy)
```
    Creates a new hash set copying a given type-specific collection.
    
    Parameters:
    
    c - a type-specific collection to be copied into the new hash set.
    
    f - the load factor.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(CharCollection c,
                             CharHash.Strategy strategy)
```
    Creates a new hash set with Hash.DEFAULT_LOAD_FACTOR as load factor copying a given type-specific collection.
    
    Parameters:
    
    c - a type-specific collection to be copied into the new hash set.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(CharIterator i,
                             float f,
                             CharHash.Strategy strategy)
```
    Creates a new hash set using elements provided by a type-specific iterator.
    
    Parameters:
    
    i - a type-specific iterator whose elements will fill the set.
    
    f - the load factor.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(CharIterator i,
                             CharHash.Strategy strategy)
```
    Creates a new hash set with Hash.DEFAULT_LOAD_FACTOR as load factor using elements provided by a type-specific iterator.
    
    Parameters:
    
    i - a type-specific iterator whose elements will fill the set.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(Iterator<?> i,
                             float f,
                             CharHash.Strategy strategy)
```
    Creates a new hash set using elements provided by an iterator.
    
    Parameters:
    
    i - an iterator whose elements will fill the set.
    
    f - the load factor.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(Iterator<?> i,
                             CharHash.Strategy strategy)
```
    Creates a new hash set with Hash.DEFAULT_LOAD_FACTOR as load factor using elements provided by an iterator.
    
    Parameters:
    
    i - an iterator whose elements will fill the set.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(char[] a,
                             int offset,
                             int length,
                             float f,
                             CharHash.Strategy strategy)
```
    Creates a new hash 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.
    
    f - the load factor.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(char[] a,
                             int offset,
                             int length,
                             CharHash.Strategy strategy)
```
    Creates a new hash set with Hash.DEFAULT_LOAD_FACTOR as load factor 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.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(char[] a,
                             float f,
                             CharHash.Strategy strategy)
```
    Creates a new hash set copying the elements of an array.
    
    Parameters:
    
    a - an array to be copied into the new hash set.
    
    f - the load factor.
    
    strategy - the strategy.
  - CharOpenCustomHashSet
```
public CharOpenCustomHashSet(char[] a,
                             CharHash.Strategy strategy)
```
    Creates a new hash set with Hash.DEFAULT_LOAD_FACTOR as load factor copying the elements of an array.
    
    Parameters:
    
    a - an array to be copied into the new hash set.
    
    strategy - the strategy.
- Method Detail
  - strategy
```
public CharHash.Strategy strategy()
```
    Returns the hashing strategy.
    
    Returns:
    
    the hashing strategy of this custom hash set.
  - addAll
```
public boolean addAll(CharCollection c)
```
    Description copied from interface: CharCollection
    
    Adds all elements of the given type-specific collection to this collection.
    
    Specified by:
    
    addAll in interface CharCollection
    
    Overrides:
    
    addAll in class AbstractCharCollection
    
    Parameters:
    
    c - a type-specific collection.
    
    Returns:
    
    true if this collection changed as a result of the call.
    
    See Also:
    
    Collection.addAll(Collection)
  - addAll
```
public boolean addAll(Collection<? extends Character> c)
```
    Description copied from class: java.util.AbstractCollection
    
    Adds all of the elements in the specified collection to this collection (optional operation). The behavior of this operation is undefined if the specified collection is modified while the operation is in progress. (This implies that the behavior of this call is undefined if the specified collection is this collection, and this collection is nonempty.)
    This implementation iterates over the specified collection, and adds each object returned by the iterator to this collection, in turn.
    Note that this implementation will throw an UnsupportedOperationException unless add is overridden (assuming the specified collection is non-empty).
    
    Specified by:
    
    addAll in interface Collection<Character>
    
    Specified by:
    
    addAll in interface Set<Character>
    
    Overrides:
    
    addAll in class AbstractCollection<Character>
    
    Parameters:
    
    c - collection containing elements to be added to this collection
    
    Returns:
    
    true if this collection changed as a result of the call
    
    See Also:
    
    AbstractCollection.add(Object)
  - 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 interface CharCollection
    
    Overrides:
    
    add in class AbstractCharCollection
    
    See Also:
    
    Collection.add(Object)
  - 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 the List interface. Delegates to the type-specific rem() method implemented by type-specific abstract Collection superclass.
    
    Specified by:
    
    remove in interface CharSet
    
    Overrides:
    
    remove in class AbstractCharSet
    
    See Also:
    
    Collection.remove(Object)
  - contains
```
public boolean contains(char k)
```
    Description copied from class: AbstractCharCollection
    
    Returns true 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 interface CharCollection
    
    Overrides:
    
    contains in class AbstractCharCollection
    
    See Also:
    
    Collection.contains(Object)
  - clear
```
public void clear()
```
    Description copied from class: java.util.AbstractCollection
    
    Removes all of the elements from this collection (optional operation). The collection will be empty after this method returns.
    This implementation iterates over this collection, removing each element using the Iterator.remove operation. Most implementations will probably choose to override this method for efficiency.
    Note that this implementation will throw an UnsupportedOperationException if the iterator returned by this collection's iterator method does not implement the remove method and this collection is non-empty.
    
    Specified by:
    
    clear in interface Collection<Character>
    
    Specified by:
    
    clear in interface Set<Character>
    
    Overrides:
    
    clear in class AbstractCollection<Character>
  - size
```
public int size()
```
    Description copied from interface: java.util.Collection
    
    Returns the number of elements in this collection. If this collection contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.
    
    Specified by:
    
    size in interface Collection<Character>
    
    Specified by:
    
    size in interface Set<Character>
    
    Specified by:
    
    size in class AbstractCollection<Character>
    
    Returns:
    
    the number of elements in this collection
  - isEmpty
```
public boolean isEmpty()
```
    Description copied from class: java.util.AbstractCollection
    
    Returns true if this collection contains no elements.
    This implementation returns size() == 0.
    
    Specified by:
    
    isEmpty in interface Collection<Character>
    
    Specified by:
    
    isEmpty in interface Set<Character>
    
    Overrides:
    
    isEmpty in class AbstractCollection<Character>
    
    Returns:
    
    true if this collection contains no elements
  - iterator
```
public CharIterator iterator()
```
    Description copied from class: java.util.AbstractCollection
    
    Returns an iterator over the elements contained in this collection.
    
    Specified by:
    
    iterator in interface CharCollection
    
    Specified by:
    
    iterator in interface CharIterable
    
    Specified by:
    
    iterator in interface CharSet
    
    Specified by:
    
    iterator in interface Iterable<Character>
    
    Specified by:
    
    iterator in interface Collection<Character>
    
    Specified by:
    
    iterator in interface Set<Character>
    
    Specified by:
    
    iterator in class AbstractCharSet
    
    Returns:
    
    an iterator over the elements contained in this collection
    
    See Also:
    
    Iterable.iterator()
  - trim
```
public boolean trim()
```
    Rehashes this set, making the table as small as possible.
    This method rehashes the table to the smallest size satisfying the load factor. It can be used when the set will not be changed anymore, so to optimize access speed and size.
    If the table size is already the minimum possible, this method does nothing.
    
    Returns:
    
    true if there was enough memory to trim the set.
    
    See Also:
    
    trim(int)
  - trim
```
public boolean trim(int n)
```
    Rehashes this set if the table is too large.
    Let N be the smallest table size that can hold max(n,size()) entries, still satisfying the load factor. If the current table size is smaller than or equal to N, this method does nothing. Otherwise, it rehashes this set in a table of size N.
    This method is useful when reusing sets. Clearing a set leaves the table size untouched. If you are reusing a set many times, you can call this method with a typical size to avoid keeping around a very large table just because of a few large transient sets.
    
    Parameters:
    
    n - the threshold for the trimming.
    
    Returns:
    
    true if there was enough memory to trim the set.
    
    See Also:
    
    trim()
  - clone
```
public CharOpenCustomHashSet clone()
```
    Returns a deep copy of this set.
    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.
    
    Overrides:
    
    clone in class Object
    
    Returns:
    
    a deep copy of this set.
    
    See Also:
    
    Cloneable
  - hashCode
```
public int hashCode()
```
    Returns a hash code for this set. This method overrides the generic method provided by the superclass. Since equals() is not overriden, it is important that the value returned by this method is the same value as the one returned by the overriden method.
    
    Specified by:
    
    hashCode in interface Collection<Character>
    
    Specified by:
    
    hashCode in interface Set<Character>
    
    Overrides:
    
    hashCode in class AbstractCharSet
    
    Returns:
    
    a hash code for this set.
    
    See Also:
    
    Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

Class CharOpenCustomHashSet

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.Hash

Field Summary

Fields inherited from interface it.unimi.dsi.fastutil.Hash

Constructor Summary

Method Summary

Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharSet

Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharCollection

Methods inherited from class java.util.AbstractCollection

Methods inherited from class java.lang.Object

Methods inherited from interface it.unimi.dsi.fastutil.chars.CharSet

Methods inherited from interface it.unimi.dsi.fastutil.chars.CharCollection

Methods inherited from interface it.unimi.dsi.fastutil.chars.CharIterable

Methods inherited from interface java.util.Set

Methods inherited from interface java.util.Collection

Constructor Detail

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

CharOpenCustomHashSet

Method Detail

strategy

addAll

addAll

add

remove

contains

clear

size

isEmpty

iterator

trim

trim

clone

hashCode