java.lang.Object
- com.jogamp.common.util.ArrayHashMap<K,V>

All Implemented Interfaces:

Cloneable, Map<K,V>
```
public class ArrayHashMap<K,V>
extends Object
implements Cloneable, Map<K,V>
```
HashMap implementation backed by an ArrayList to preserve order of values. Implementation properties are:
- Unique elements utilizing Object.hashCode() for O(1) operations, see below.
- Java 1.5 compatible
O(1) operations:
- put new key-value-pair(s)
- test for containment
- trying to remove non existent elements
O(n) operations:
- put existing key-value-pair(s)
- removing existing elements
For thread safety, the application shall decorate access to instances via RecursiveLock.

Nested Class Summary
- Nested classes/interfaces inherited from interface java.util.Map
  Map.Entry<K extends Object,V extends Object>

Field Summary

Fields
Modifier and Type Field Description

static int DEFAULT_INITIAL_CAPACITY
The default initial capacity: 16

static float DEFAULT_LOAD_FACTOR
Default load factor: 0.75f

Constructor Summary

Constructors
Constructor	Description
`ArrayHashMap(boolean supportNullValue, int initialCapacity, float loadFactor)`
`ArrayHashMap(ArrayHashMap<K,V> o)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`
`Object`	`clone()`	Implementation uses `ArrayHashMap(ArrayHashMap)`.
`boolean`	`containsKey(Object key)`
`boolean`	`containsValue(Object value)`
`Set<Map.Entry<K,V>>`	`entrySet()`
`boolean`	`equals(Object arrayHashMap)`
`V`	`get(Object key)`
`ArrayList<V>`	`getData()`	Returns this object ordered ArrayList.
`HashMap<K,V>`	`getMap()`	Returns this object hash map.
`int`	`hashCode()`
`boolean`	`isEmpty()`
`Set<K>`	`keySet()`
`V`	`put(K key, V value)`
`void`	`putAll(Map<? extends K,? extends V> m)`
`V`	`remove(Object key)`
`int`	`size()`
`boolean`	`supportsNullValue()`	Returns `true` for default behavior, i.e.
`ArrayList<V>`	`toArrayList()`
`String`	`toString()`
`Collection<V>`	`values()`

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

Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

- Field Detail
  - DEFAULT_LOAD_FACTOR
```
public static final float DEFAULT_LOAD_FACTOR
```
    Default load factor: 0.75f
    
    See Also:
    
    Constant Field Values
  - DEFAULT_INITIAL_CAPACITY
```
public static final int DEFAULT_INITIAL_CAPACITY
```
    The default initial capacity: 16
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - ArrayHashMap
```
public ArrayHashMap(boolean supportNullValue,
                    int initialCapacity,
                    float loadFactor)
```
    Parameters:
    
    supportNullValue - Use true for default behavior, i.e. null can be a valid value. Use false if null is not a valid value, here put(Object, Object) and remove(Object) will be optimized.
    
    initialCapacity - use DEFAULT_INITIAL_CAPACITY for default
    
    loadFactor - use DEFAULT_LOAD_FACTOR for default
    
    See Also:
    
    supportsNullValue()
  - ArrayHashMap
```
public ArrayHashMap(ArrayHashMap<K,V> o)
```
- Method Detail
  - supportsNullValue
```
public final boolean supportsNullValue()
```
    Returns true for default behavior, i.e. null can be a valid value.
    Returns false if null is not a valid value, here put(Object, Object) and remove(Object) are optimized operations.
    
    See Also:
    
    ArrayHashMap(boolean, int, float)
  - clone
```
public final Object clone()
```
    Implementation uses ArrayHashMap(ArrayHashMap).
    
    Overrides:
    
    clone in class Object
    
    Returns:
    
    a shallow copy of this ArrayHashMap, elements are not copied.
  - getData
```
public final ArrayList<V> getData()
```
    Returns this object ordered ArrayList. Use w/ care, it's not a copy.
    
    See Also:
    
    toArrayList()
  - toArrayList
```
public final ArrayList<V> toArrayList()
```
    Returns:
    
    a shallow copy of this ArrayHashMap's ArrayList, elements are not copied.
    
    See Also:
    
    getData()
  - getMap
```
public final HashMap<K,V> getMap()
```
    Returns this object hash map. Use w/ care, it's not a copy.
  - toString
```
public final String toString()
```
    Overrides:
    
    toString in class Object
  - clear
```
public final void clear()
```
    Specified by:
    
    clear in interface Map<K,V>
  - keySet
```
public Set<K> keySet()
```
    Specified by:
    
    keySet in interface Map<K,V>
  - values
```
public Collection<V> values()
```
    See getData() and toArrayList().
    
    Specified by:
    
    values in interface Map<K,V>
    
    See Also:
    
    getData(), toArrayList()
  - entrySet
```
public Set<Map.Entry<K,V>> entrySet()
```
    Specified by:
    
    entrySet in interface Map<K,V>
  - get
```
public final V get(Object key)
```
    Specified by:
    
    get in interface Map<K,V>
  - put
```
public final V put(K key,
                   V value)
            throws NullPointerException
```
    This is an O(1) operation, in case the key does not exist, otherwise O(n).
    
    Specified by:
    
    put in interface Map<K,V>
    
    Throws:
    
    NullPointerException - if value is null but supportsNullValue() == false
  - putAll
```
public void putAll(Map<? extends K,? extends V> m)
```
    Specified by:
    
    putAll in interface Map<K,V>
  - remove
```
public final V remove(Object key)
```
    This is an O(1) operation, in case the key does not exist, otherwise O(n).
    
    Specified by:
    
    remove in interface Map<K,V>
  - containsKey
```
public final boolean containsKey(Object key)
```
    Specified by:
    
    containsKey in interface Map<K,V>
  - containsValue
```
public boolean containsValue(Object value)
```
    Specified by:
    
    containsValue in interface Map<K,V>
  - equals
```
public final boolean equals(Object arrayHashMap)
```
    Specified by:
    
    equals in interface Map<K,V>
    
    Overrides:
    
    equals in class Object
  - hashCode
```
public final int hashCode()
```
    Specified by:
    
    hashCode in interface Map<K,V>
    
    Overrides:
    
    hashCode in class Object
  - isEmpty
```
public final boolean isEmpty()
```
    Specified by:
    
    isEmpty in interface Map<K,V>
  - size
```
public final int size()
```
    Specified by:
    
    size in interface Map<K,V>

Modifier and Type	Field	Description
`static int`	`DEFAULT_INITIAL_CAPACITY`	The default initial capacity: 16
`static float`	`DEFAULT_LOAD_FACTOR`	Default load factor: 0.75f

Class ArrayHashMap<K,​V>

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Map

Field Detail

DEFAULT_LOAD_FACTOR

DEFAULT_INITIAL_CAPACITY

Constructor Detail

ArrayHashMap

ArrayHashMap

Method Detail

supportsNullValue

clone

getData

toArrayList

getMap

toString

clear

keySet

values

entrySet

get

put

putAll

remove

containsKey

containsValue

equals

hashCode

isEmpty

size

Class ArrayHashMap<K,V>