Package com.google.common.collect
Class ForwardingMap.StandardValues
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- <V>
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- com.google.common.collect.ForwardingMap.StandardValues
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- All Implemented Interfaces:
<V>
,<V>
- Enclosing class:
- ForwardingMap<K,V>
@Beta protected class ForwardingMap.StandardValues extends <V>
A sensible implementation of in terms of the following methods:ForwardingMap.clear()
,ForwardingMap.containsValue(java.lang.Object)
,ForwardingMap.isEmpty()
, method ofForwardingMap.entrySet()
. In many cases, you may wish to overrideForwardingMap.values()
to forward to this implementation or a subclass thereof.- Since:
- 10.0
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Constructor Summary
Constructors Constructor Description StandardValues()
Constructor for use by subclasses.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Removes all of the elements from this collection (optional operation).boolean
o)
Returnstrue
if this collection contains the specified element.void
<? super V> action)
Performs the given action for each element of theIterable
until all elements have been processed or the action throws an exception.boolean
isEmpty()
Returnstrue
if this collection contains no elements.<V>
iterator()
Returns an iterator over the elements contained in this collection.boolean
o)
Removes a single instance of the specified element from this collection, if it is present (optional operation).boolean
<?> c)
Removes all of this collection's elements that are also contained in the specified collection (optional operation).boolean
<?> c)
Retains only the elements in this collection that are contained in the specified collection (optional operation).int
size()
Returns the number of elements in this collection.
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Constructor Detail
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StandardValues
public StandardValues()
Constructor for use by subclasses.
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Method Detail
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iterator
public <V> iterator()
Description copied from class:Returns an iterator over the elements contained in this collection.- Specified by:
in interface
<K>
- Specified by:
in interface
<K>
- Specified by:
in class
<V>
- Returns:
- an iterator over the elements contained in this collection
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forEach
public void forEach(<? super V> action)
Description copied from interface:Performs the given action for each element of theIterable
until all elements have been processed or the action throws an exception. Actions are performed in the order of iteration, if that order is specified. Exceptions thrown by the action are relayed to the caller.The behavior of this method is unspecified if the action performs side-effects that modify the underlying source of elements, unless an overriding class has specified a concurrent modification policy.
- Parameters:
action
- The action to be performed for each element
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remove
public boolean remove( o)
Description copied from class:Removes a single instance of the specified element from this collection, if it is present (optional operation). More formally, removes an elemente
such thatObjects.equals(o, e)
, if this collection contains one or more such elements. Returnstrue
if this collection contained the specified element (or equivalently, if this collection changed as a result of the call).- Specified by:
in interface
<K>
- Overrides:
in class
<V>
- Parameters:
o
- element to be removed from this collection, if present- Returns:
true
if an element was removed as a result of this call
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removeAll
public boolean removeAll(<?> c)
Description copied from class:Removes all of this collection's elements that are also contained in the specified collection (optional operation). After this call returns, this collection will contain no elements in common with the specified collection.- Specified by:
in interface
<K>
- Overrides:
in class
<V>
- Parameters:
c
- collection containing elements to be removed from this collection- Returns:
true
if this collection changed as a result of the call- See Also:
- ,
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retainAll
public boolean retainAll(<?> c)
Description copied from class:Retains only the elements in this collection that are contained in the specified collection (optional operation). In other words, removes from this collection all of its elements that are not contained in the specified collection.- Specified by:
in interface
<K>
- Overrides:
in class
<V>
- Parameters:
c
- collection containing elements to be retained in this collection- Returns:
true
if this collection changed as a result of the call- See Also:
- ,
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size
public int size()
Description copied from interface:Returns the number of elements in this collection. If this collection contains more thanInteger.MAX_VALUE
elements, returnsInteger.MAX_VALUE
.- Specified by:
in interface
<K>
- Specified by:
in class
<V>
- Returns:
- the number of elements in this collection
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isEmpty
public boolean isEmpty()
Description copied from class:Returnstrue
if this collection contains no elements.- Specified by:
in interface
<K>
- Overrides:
in class
<V>
- Returns:
true
if this collection contains no elements
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contains
public boolean contains( o)
Description copied from class:Returnstrue
if this collection contains the specified element. More formally, returnstrue
if and only if this collection contains at least one elemente
such thatObjects.equals(o, e)
.- Specified by:
in interface
<K>
- Overrides:
in class
<V>
- Parameters:
o
- element whose presence in this collection is to be tested- Returns:
true
if this collection contains the specified element
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clear
public void clear()
Description copied from class:Removes all of the elements from this collection (optional operation). The collection will be empty after this method returns.- Specified by:
in interface
<K>
- Overrides:
in class
<V>
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