public class Long2LongArrayMap extends AbstractLong2LongMap implements Serializable, 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 pairs: just put them into two parallel arrays and scan linearly to find an item.
AbstractLong2LongMap.BasicEntryLong2LongMap.Entry, Long2LongMap.FastEntrySet| Constructor and Description |
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Long2LongArrayMap()
Creates a new empty array map.
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Long2LongArrayMap(int capacity)
Creates a new empty array map of given capacity.
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Long2LongArrayMap(long[] key,
long[] value)
Creates a new empty array map with given key and value backing arrays.
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Long2LongArrayMap(long[] key,
long[] value,
int size)
Creates a new array map with given key and value backing arrays, using
the given number of elements.
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Long2LongArrayMap(Long2LongMap m)
Creates a new empty array map copying the entries of a given map.
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Long2LongArrayMap(Map<? extends Long,? extends Long> m)
Creates a new empty array map copying the entries of a given map.
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| Modifier and Type | Method and Description |
|---|---|
void |
clear()
Removes all of the mappings from this map (optional operation).
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Long2LongArrayMap |
clone()
Returns a deep copy of this map.
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boolean |
containsKey(long k)
Returns true if this function contains a mapping for the specified key.
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boolean |
containsValue(long v)
Returns
true if this map maps one or more keys to the specified
value. |
long |
get(long k)
Returns the value to which the given key is mapped.
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boolean |
isEmpty()
Returns true if this map contains no key-value mappings.
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LongSet |
keySet()
Returns a type-specific-set view of the keys of this map.
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Long2LongMap.FastEntrySet |
long2LongEntrySet()
Returns a type-specific set view of the mappings contained in this map.
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long |
put(long k,
long v)
Adds a pair to the map (optional operation).
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long |
remove(long k)
Removes the mapping with the given key (optional operation).
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int |
size()
Returns the number of key/value mappings in this map.
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LongCollection |
values()
Returns a type-specific-set view of the values of this map.
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equals, hashCode, putAll, toStringdefaultReturnValue, defaultReturnValuecompute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsValue, defaultReturnValue, defaultReturnValue, entrySet, get, getOrDefault, getOrDefault, merge, merge, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replaceapplyAsLongandThen, compose, identityforEach, replaceAllpublic Long2LongArrayMap(long[] key,
long[] value)
It is responsibility of the caller that the elements of key are
distinct.
key - the key array.value - the value array (it must have the same length as
key).public Long2LongArrayMap()
public Long2LongArrayMap(int capacity)
capacity - the initial capacity.public Long2LongArrayMap(Long2LongMap m)
m - a map.public Long2LongArrayMap(Map<? extends Long,? extends Long> m)
m - a map.public Long2LongArrayMap(long[] key,
long[] value,
int size)
It is responsibility of the caller that the first size elements
of key are distinct.
key - the key array.value - the value array (it must have the same length as
key).size - the number of valid elements in key and value.public Long2LongMap.FastEntrySet long2LongEntrySet()
Long2LongMap
This method is necessary because there is no inheritance along type
parameters: it is thus impossible to strengthen Map.entrySet() so
that it returns an ObjectSet of
type-specific entries (the latter makes it possible to access keys and
values with type-specific methods).
long2LongEntrySet in interface Long2LongMapMap.entrySet()public long get(long k)
Long2LongFunctionget in interface Long2LongFunctionk - the key.Function.get(Object)public int size()
Long2LongMapInteger.MAX_VALUE elements, returns
Integer.MAX_VALUE.public void clear()
Long2LongMapclear in interface Long2LongMapclear in interface Map<Long,Long>Map.clear()public boolean containsKey(long k)
Long2LongMapcontainsKey in interface Long2LongFunctioncontainsKey in interface Long2LongMapcontainsKey in class AbstractLong2LongMapk - the key.key.Map.containsKey(Object)public boolean containsValue(long v)
Long2LongMaptrue if this map maps one or more keys to the specified
value.containsValue in interface Long2LongMapcontainsValue in class AbstractLong2LongMapMap.containsValue(Object)public boolean isEmpty()
java.util.Mappublic long put(long k,
long v)
Long2LongFunctionput in interface Long2LongFunctionk - the key.v - the value.Function.put(Object,Object)public long remove(long k)
Long2LongFunctionremove in interface Long2LongFunctionk - the key.Function.remove(Object)public LongSet keySet()
AbstractLong2LongMap
The view is backed by the set returned by Map.entrySet(). Note
that no attempt is made at caching the result of this method, as
this would require adding some attributes that lightweight
implementations would not need. Subclasses may easily override this
policy by calling this method and caching the result, but implementors
are encouraged to write more efficient ad-hoc implementations.
keySet in interface Long2LongMapkeySet in interface Map<Long,Long>keySet in class AbstractLong2LongMapMap.keySet()public LongCollection values()
AbstractLong2LongMap
The view is backed by the set returned by Map.entrySet(). Note
that no attempt is made at caching the result of this method, as
this would require adding some attributes that lightweight
implementations would not need. Subclasses may easily override this
policy by calling this method and caching the result, but implementors
are encouraged to write more efficient ad-hoc implementations.
values in interface Long2LongMapvalues in interface Map<Long,Long>values in class AbstractLong2LongMapMap.values()public Long2LongArrayMap clone()
This method performs a deep copy of this hash map; the data stored in the map, however, is not cloned. Note that this makes a difference only for object keys.