WeakHashMap (Codename One API)

java.lang.Object
- com.codename1.ui.util.WeakHashMap<K,V>

All Implemented Interfaces:: Map<K,V>

public class WeakHashMap<K,V>
extends Object
implements Map<K,V>

Helper weak hash map substitute

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

Constructor Summary

Constructors
Constructor and Description

WeakHashMap()

Constructors
Constructor and Description
`WeakHashMap()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`clear()` Removes all elements from this `Map`, leaving it empty.
`boolean`	`containsKey(Object key)` Returns whether this `Map` contains the specified key.
`boolean`	`containsValue(Object value)` This method is unsupported in the weak hash map
`Set<Map.Entry<K,V>>`	`entrySet()` Unsupported operation
`V`	`get(Object key)` Returns the value of the mapping with the specified key.
`boolean`	`isEmpty()` Returns whether this map is empty.
`Set<K>`	`keySet()` Returns a set of the keys contained in this `Map`.
`V`	`put(K key, V value)` Maps the specified key to the specified value.
`void`	`putAll(Map<? extends K,? extends V> m)` Copies every mapping in the specified `Map` to this `Map`.
`V`	`remove(Object key)` Removes a mapping with the specified key from this `Map`.
`int`	`size()` Returns the number of mappings in this `Map`.
`Collection<V>`	`values()` Unsupported operation

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Map
equals, hashCode

- Constructor Detail
  - WeakHashMap
```
public WeakHashMap()
```
- Method Detail
  - size
```
public int size()
```
    Returns the number of mappings in this Map.
    
    Specified by:
    
    size in interface Map<K,V>
    
    Returns:
    
    the number of mappings in this Map.
  - isEmpty
```
public boolean isEmpty()
```
    Returns whether this map is empty.
    
    Specified by:
    
    isEmpty in interface Map<K,V>
    
    Returns:
    
    true if this map has no elements, false otherwise.
    
    See Also:
    
    Map.size()
  - containsKey
```
public boolean containsKey(Object key)
```
    Returns whether this Map contains the specified key.
    
    Specified by:
    
    containsKey in interface Map<K,V>
    
    Parameters:
    
    key - the key to search for.
    
    Returns:
    
    true if this map contains the specified key, false otherwise.
  - containsValue
```
public boolean containsValue(Object value)
```
    This method is unsupported in the weak hash map
    
    Specified by:
    
    containsValue in interface Map<K,V>
    
    Parameters:
    
    value - the value to search for.
    
    Returns:
    
    true if this map contains the specified value, false otherwise.
  - get
```
public V get(Object key)
```
    Returns the value of the mapping with the specified key.
    
    Specified by:
    
    get in interface Map<K,V>
    
    Parameters:
    
    key - the key.
    
    Returns:
    
    the value of the mapping with the specified key, or null if no mapping for the specified key is found.
  - put
```
public V put(K key,
             V value)
```
    Maps the specified key to the specified value.
    
    Specified by:
    
    put in interface Map<K,V>
    
    Parameters:
    
    key - the key.
    
    value - the value.
    
    Returns:
    
    the value of any previous mapping with the specified key or null if there was no mapping.
  - remove
```
public V remove(Object key)
```
    Removes a mapping with the specified key from this Map.
    
    Specified by:
    
    remove in interface Map<K,V>
    
    Parameters:
    
    key - the key of the mapping to remove.
    
    Returns:
    
    the value of the removed mapping or null if no mapping for the specified key was found.
  - putAll
```
public void putAll(Map<? extends K,? extends V> m)
```
    Copies every mapping in the specified Map to this Map.
    
    Specified by:
    
    putAll in interface Map<K,V>
    
    Parameters:
    
    m - the Map to copy mappings from.
  - clear
```
public void clear()
```
    Removes all elements from this Map, leaving it empty.
    
    Specified by:
    
    clear in interface Map<K,V>
    
    See Also:
    
    Map.isEmpty(), Map.size()
  - keySet
```
public Set<K> keySet()
```
    Returns a set of the keys contained in this Map. The Set is backed by this Map so changes to one are reflected by the other. The Set does not support adding.
    
    Specified by:
    
    keySet in interface Map<K,V>
    
    Returns:
    
    a set of the keys.
  - values
```
public Collection<V> values()
```
    Unsupported operation
    
    Specified by:
    
    values in interface Map<K,V>
    
    Returns:
    
    a collection of the values contained in this map.
  - entrySet
```
public Set<Map.Entry<K,V>> entrySet()
```
    Unsupported operation
    
    Specified by:
    
    entrySet in interface Map<K,V>
    
    Returns:
    
    a set of the mappings

Class WeakHashMap<K,V>

Nested Class Summary

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

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Map

Constructor Detail

WeakHashMap

Method Detail

size

isEmpty

containsKey

containsValue

get

put

remove

putAll

clear

keySet

values

entrySet