- java.lang.Object
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- io.netty5.util.collection.IntObjectHashMap<V>
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- Type Parameters:
V
- The value type stored in the map.
- All Implemented Interfaces:
IntObjectMap<V>
,Map<Integer,V>
public class IntObjectHashMap<V> extends Object implements IntObjectMap<V>
A hash map implementation ofIntObjectMap
that uses open addressing for keys. To minimize the memory footprint, this class uses open addressing rather than chaining. Collisions are resolved using linear probing. Deletions implement compaction, so cost of remove can approach O(N) for full maps, which makes a small loadFactor recommended.
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Nested Class Summary
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Nested classes/interfaces inherited from interface io.netty5.util.collection.IntObjectMap
IntObjectMap.PrimitiveEntry<V>
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Field Summary
Fields Modifier and Type Field Description static int
DEFAULT_CAPACITY
Default initial capacity.static float
DEFAULT_LOAD_FACTOR
Default load factor.
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Constructor Summary
Constructors Constructor Description IntObjectHashMap()
IntObjectHashMap(int initialCapacity)
IntObjectHashMap(int initialCapacity, float loadFactor)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
boolean
containsKey(int key)
Indicates whether or not this map contains a value for the specified key.boolean
containsKey(Object key)
boolean
containsValue(Object value)
Iterable<IntObjectMap.PrimitiveEntry<V>>
entries()
Gets an iterable to traverse over the primitive entries contained in this map.Set<Map.Entry<Integer,V>>
entrySet()
boolean
equals(Object obj)
V
get(int key)
Gets the value in the map with the specified key.V
get(Object key)
int
hashCode()
boolean
isEmpty()
Set<Integer>
keySet()
protected String
keyToString(int key)
Helper method called bytoString()
in order to convert a single map key into a string.V
put(int key, V value)
Puts the given entry into the map.V
put(Integer key, V value)
void
putAll(Map<? extends Integer,? extends V> sourceMap)
V
remove(int key)
Removes the entry with the specified key.V
remove(Object key)
int
size()
String
toString()
Collection<V>
values()
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll
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Field Detail
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DEFAULT_CAPACITY
public static final int DEFAULT_CAPACITY
Default initial capacity. Used if not specified in the constructor- See Also:
- Constant Field Values
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DEFAULT_LOAD_FACTOR
public static final float DEFAULT_LOAD_FACTOR
Default load factor. Used if not specified in the constructor- See Also:
- Constant Field Values
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Method Detail
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get
public V get(int key)
Description copied from interface:IntObjectMap
Gets the value in the map with the specified key.- Specified by:
get
in interfaceIntObjectMap<V>
- Parameters:
key
- the key whose associated value is to be returned.- Returns:
- the value or
null
if the key was not found in the map.
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put
public V put(int key, V value)
Description copied from interface:IntObjectMap
Puts the given entry into the map.- Specified by:
put
in interfaceIntObjectMap<V>
- Parameters:
key
- the key of the entry.value
- the value of the entry.- Returns:
- the previous value for this key or
null
if there was no previous mapping.
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remove
public V remove(int key)
Description copied from interface:IntObjectMap
Removes the entry with the specified key.- Specified by:
remove
in interfaceIntObjectMap<V>
- Parameters:
key
- the key for the entry to be removed from this map.- Returns:
- the previous value for the key, or
null
if there was no mapping.
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containsKey
public boolean containsKey(int key)
Description copied from interface:IntObjectMap
Indicates whether or not this map contains a value for the specified key.- Specified by:
containsKey
in interfaceIntObjectMap<V>
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containsValue
public boolean containsValue(Object value)
- Specified by:
containsValue
in interfaceMap<Integer,V>
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entries
public Iterable<IntObjectMap.PrimitiveEntry<V>> entries()
Description copied from interface:IntObjectMap
Gets an iterable to traverse over the primitive entries contained in this map. As an optimization, theIntObjectMap.PrimitiveEntry
s returned by theIterator
may change as theIterator
progresses. The caller should not rely onIntObjectMap.PrimitiveEntry
key/value stability.- Specified by:
entries
in interfaceIntObjectMap<V>
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hashCode
public int hashCode()
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equals
public boolean equals(Object obj)
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containsKey
public boolean containsKey(Object key)
- Specified by:
containsKey
in interfaceMap<Integer,V>
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keyToString
protected String keyToString(int key)
Helper method called bytoString()
in order to convert a single map key into a string. This is protected to allow subclasses to override the appearance of a given key.
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